identify the options below that are results of adding a catalyst to a chemical system. (select all that apply) select all that apply: the reaction rates are increased. the reaction quotient is unaffected. the reaction quotient decreases. the equilibrium constant is unaffected
Answers
Adding a catalyst to a chemical system has some certain effects including increased reaction rates, reaction quotient is unaffected.
What is a catalyst?A catalyst is an element or compound that speeds up the rate of a chemical reaction by lowering the activation energy barrier. The catalyst provides an alternative mechanism with a smaller activation energy that is followed by the reactants. As a result, adding a catalyst to a chemical system increases the reaction rate.
The reaction quotient is unaffected: When a catalyst is added to a chemical system, the reaction quotient is not affected because it does not change the composition of the equilibrium mixture. Therefore, adding a catalyst to a chemical system does not have an effect on the reaction quotient.
Therefore, the correct options are A and B.
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Related Questions
Balance the following equation: __ NH3 + __O2 à __ NO2 + __H2O
The balanced equation shows that 1.00 mol of NH3 requires __ mole(s) of O2.
Answers
The balanced equation is:
8 NH3 + 7 O2 → 8 NO2 + 12 H2O.
Also, 1.00 mol of NH3 requires (7/8) mole(s) of O2.
Balancing chemical reactions involves adjusting the coefficients (numbers in front of the chemical formulas) in the chemical equation to ensure that the same number of atoms of each element are present on both sides of the equation.
Step 1: Write the unbalanced equation:
NH3 + O2 → NO2 + H2O
Step 2: Balance the nitrogen atoms:
4 NH3 + O2 → 4 NO2 + H2O
Step 3: Balance the hydrogen atoms by placing a coefficient of 6 in front of H2O:
4 NH3 + O2 → 4 NO2 + 6 H2O
Step 4: Balance the oxygen atoms by placing a coefficient of 7/2 in front of O2:
4 NH3 + (7/2) O2 → 4 NO2 + 6 H2O
Step 5: To remove the fraction, multiply all coefficients by 2:
8 NH3 + 7 O2 → 8 NO2 + 12 H2O
So, the balanced equation is: 8 NH3 + 7 O2 → 8 NO2 + 12 H2O.
According to the balanced equation, 1.00 mol of NH3 requires 7/8 moles of O2.
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what differentiates a nonpolar covalent bond from a polar covalent bond? i. unequal sharing of electrons ii. ions iii. atoms of partial charge
Answers
The key differentiating factor between a nonpolar covalent bond and a polar covalent bond is the unequal sharing of electrons.
i. Unequal sharing of electrons: In a nonpolar covalent bond, electrons are shared equally between the atoms. This occurs when the atoms have similar electronegativity, meaning they have similar abilities to attract electrons. As a result, there is no significant difference in the electron distribution, and the atoms do not acquire partial charges.
ii. Ions: Ions are charged particles that have gained or lost electrons. Unlike ionic bonds, which involve the complete transfer of electrons, covalent bonds involve the sharing of electrons between atoms. Therefore, the presence of ions does not differentiate between nonpolar and polar covalent bonds.
iii. Atoms of partial charge: In a polar covalent bond, there is an unequal sharing of electrons due to differences in electronegativity between the atoms. One atom has a stronger pull on the shared electrons, resulting in a partial negative charge (δ-) on that atom, while the other atom has a partial positive charge (δ+).
This imbalance in electron distribution creates atoms of partial charge.
Therefore, the key distinguishing characteristic between a nonpolar covalent bond and a polar covalent bond is the unequal sharing of electrons, leading to the development of partial charges on the atoms in a polar covalent bond.
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Calcium + Sodium Bromide
balance
Answers
If the density of a gas is 1.2 g/L at 745 torr and 20 degree celsius, what is its molecular mass?R = 0.0821 L.atm/K.mol
Answers
The question requires us to calculate the molecular mass of a gas, given its density (1.2 g/L) and conditions of pressure (745 torr) and temperature (20°C).
Density is defined as the mass of a compound over its volume. From this definition, we can calculate the molecular mass of the gas knowing the density, as given by the question, and the volume of 1 mol of the gas.
\(\text{density = }\frac{mass}{\text{volume}}\to\text{mass = volume }\times\text{ density}\)We can calculate the volume of a gas considering the equation of Ideal Gases:
\(P\times V=n\times R\times T\)where P is the pressure of the gas, V is its volume, n is the number of moles, R is the constant of gases and T is the temperature.
Note that the constant of gases R was given in units of L.atm/K.mol, while the pressure and temperature were given in Torr and °C, respectively. Thus we need to convert these values to the appropriate units.
Knowing that 1 Torr corresponds to 0.00131579 atm:
1 Torr --------------------- 0.00131579 atm
745 Torr ---------------- x
Solving for x, we have that 745 Torr corresponds to 0.980 atm.
To convert the temperature from Celsius degrees to Kelvin, we must add 273.15:
T = 20 + 273.15 K = 293.15 K
Therefore, the pressure and temperature we'll use in our calculation are 0.980 atm and 293.15 K. Also, since we are calculating the molecular mass, we'll consider 1 mol of gas.
Rearranging the equation of ideal gases to calculate the volume and applying the values to the equation, we'll have:
\(\begin{gathered} P\times V=n\times R\times T\to V=\frac{n\times R\times T}{P} \\ V=\frac{(1mol)\times(0.0821L.atm/K.mol)\times(293.15K)}{(0.980\text{atm)}}=24.6L \end{gathered}\)Therefore, the volume of 1 mol of the gas under the conditions given is 24.6L.
Next, we'll use this value to calculate the molecular mass using the density given by the question:
\(\begin{gathered} \text{mass = volume }\times\text{ density} \\ \text{mass = 24.6L}\times1.2g/L \\ \text{mass = }29.5g/\text{mol} \end{gathered}\)Therefore, the gas given by the question presents 29.5g per mol.
What is meant by the term isotopes?
Answers
Describe two ways in which humans have
negatively affected groundwater.
Answers
The two ways in which humans have negatively affected groundwater are Fertilizers and pesticides.
What is fertilizers?
Fertilizers were chemical substances that are applied to crops in order to boost their yield.
What is pesticides?Pesticides are chemicals that are being used to keep pests at bay. Herbicides, insecticides, nematicides, and molluscicides are examples.
Fertilizers and pesticides applied to the land, manure from livestock as well as other animals, landfills, mining operations, even unintended releases such as chemical spills or storage tank leaks are all factors that affect groundwater quality.
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What was the second most used type of material during the 1960 s? Select one:a) Semiconductors b)Composites c) Metals d) Polymers and Elastomers e) Ceramics and glasses
Answers
The correct answer to the given question is option c) Metals.
What were the materials used during the 1960s?
The materials used during the 1960s included metals, ceramics, glasses, semiconductors, polymers, and elastomers.
The 1960s were a period of significant technological advances.
A number of new and innovative materials emerged during this time that would shape the world for decades to com. Metals were the second most used material during the 1960s. During this time, there was significant demand for materials that could withstand high temperatures and pressures, as well as resist wear and tear and corrosion .Metals were used for a wide range of applications, including the construction of aircraft, automobiles, and other machinery.
They were also used in the production of electronic components, such as resistors and capacitors, and for the manufacture of a wide range of consumer goods, from kitchen utensils to jewellery. Metals remain a critical material in today's world, with a wide range of applications in industries ranging from aerospace and automotive to electronics and construction.
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Which of the compounds in the table below is listed in the wrong colum?
Answers
Answer: C
Explanation: This is because of a nice thing called guessing
A sample of copper is heated to 100°C and placed into a calorimeter containing 50 g of water at 25°C after a few minutes the final temperature of the system reaches 40°C how much heat in joules was released by the copper Sample
Answers
Answer:
Heat = 3138J
Explanation:
In the system, the sample of Copper is releasing heat that produce the increasing in the temperature of water.
Using the equation of calorimeter, we can find the heat released for the sample of copper (The same that is absorbed for the water):
Q = C×m×ΔT
Where Q is heat, C is specific heat (For water: 4.184J/molK), m is the mass of water (50g) and ΔT is change in temperature of water (40°C-25°C = 15°C)
Replacing:
Q = 4.184J/molK×50g×15°C
Q = 3138J is the heat released for the sample of Copper (The same absorbed for the water).
Answer:
heat=3138j
Explanation:
In the system, the sample of Copper is releasing heat that produce the increasing in the temperature of water.
Using the equation of calorimeter, we can find the heat released for the sample of copper (The same that is absorbed for the water):
Q = C×m×ΔT
Where Q is heat, C is specific heat (For water: 4.184J/molK), m is the mass of water (50g) and ΔT is change in temperature of water (40°C-25°C = 15°C)
Replacing:
Q = 4.184J/molK×50g×15°C
Q = 3138J is the heat released for the sample of Copper (The same absorbed for the water).
what is fractional distinction?
Answers
Answer:
ANSWERFractional distillation is a technique used to separate miscible liquids that have boiling point difference of less than 25 ºC. The only difference in apparatus between simple and fractional distillation methods is the use of a fractionating column used during fractional distillation.\(\sf\large\underline\purple{Fractional\: Distillation:-}\)
Fractional distillation is a type of distillation which involves the separation of miscible liquids.\(\rightarrow\)The process involves repeated distillations and condensations and the mixture is usually separated into component parts. The separation happens when the mixture is heated at a certain temperature where fractions of the mixture start to vaporize.
\(\rightarrow\)The basic principle of this type of distillation is that different liquids boil and evaporate at different temperatures. So when the mixture is heated, the substance with lower boiling point starts to boil first and convert into vapours.
\(\sf\underline\green{Applications\: Of\:Fractional\: Distillation:-}\)
Fractional distillation is used for the purification of water as well as separating acetone and water.Fractional distillation is used in several industries like oil refineries and chemical plants mainly for purification and separation of many organic compounds.Fractional distillation is also used for the separation of (liquefied) air. Components like liquid nitrogen and oxygen as well as concentrated argon are obtained.Distillation is used in the production of high-purity silicon from chlorosilanes. The silicon is widely used in semiconductors.________________________________
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If an atmosphere consisting of an ideal gas were indeed homogeneous (constant density) all the way to the top at z = H, find the temperature at that top. Could such an atmosphere actually exist, even in principle? Why or why not?
Answers
The temperature at the top of an atmosphere consisting of an ideal gas with constant density can be found using the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
Assuming the density of the gas is constant throughout the atmosphere, we can express the pressure as P = ρgh, where ρ is the density, g is the acceleration due to gravity, and h is the height.
Since the atmosphere is homogeneous, the pressure at the top (P_top) is the same as the pressure at the bottom (P_bottom), so we have P_top = P_bottom = ρgh.
Using the ideal gas law, we can write ρghV = nRT, where V is the volume of the gas.
Assuming the volume of the gas is constant, we can cancel out V, and rearranging the equation, we get T_top = (nRT_bottom)/(nR) = T_bottom.
Therefore, the temperature at the top of the atmosphere would be the same as the temperature at the bottom.
In practice, however, it is not possible for an atmosphere to have constant density all the way to the top. As we go higher in the atmosphere, the density decreases due to decreasing pressure and temperature. This is because gravity becomes weaker at higher altitudes. Therefore, in reality, the temperature would decrease as we move higher in the atmosphere.
So, while a homogeneous atmosphere with constant density all the way to the top cannot exist in practice, it can be considered as an idealized scenario for understanding certain aspects of atmospheric behavior.
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Chymotrypsin has an α-helix that contains 2.5 turns. Approximately how many amino acids are involved in this helix?A. 20.25B. 9C. 13.5D. 3.75E. 2.5
Answers
Chymotrypsin has an α-helix that contains 2.5 turns. Approximately 9 amino acids are involved in this helix.
What is chymotrypsin?
The pancreas produces chymotrypsin. Chymotrypsinogen is its precursor. By cleaving peptide bonds in locations Arg15–Ile16, trypsin activates chymotrypsinogen and generates –chymotrypsin. The "oxyanion hole" and the hydrophobic "S1 pocket" are the results of the interaction between the aminic group (-NH3+) of the Ile16 residue and the side chain of Asp194. Additionally, chymotrypsin causes its own activation by cleaving at positions 14, 15, 146, and 148 to create -chymotrypsin, which is both more active and stable than -chymotrypsin. A three-polypeptide molecule with disulfide bonds connecting them makes up the final product.To know more about chymotrypsin, click the link given below:
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Zoe, a nutritionist, is giving a presentation about childhood obesity to a group of teachers. She ends her speech with this statement: "We can do better. We must eat healthier and exercise. Will you join me?”
This is an effective conclusion because it
leaves a lasting impression for the audience.
gives supporting details for the main idea.
establishes the main idea of the presentation.
gets the audience interested to hear more.
Also The answer is A) leaves a lasting impression for the audience.
Thx me latter!
Answers
Answer:
A
Explanation:
The statement made by Zoe as follows "We can do better. We must eat healthier and exercise. Will you join me?” is an effective conclusion because it leaves a lasting impression for the audience.
How is an effective conclusion made?Public speakers are those who speak to a group of people in a structured manner.
However, asides presenting a spectacular body message, the conclusion must leave a lasting impression on the audience to enable them practice what was presented.
According to this question, Zoe made a conclusive statement as follows: "We can do better. We must eat healthier and exercise. Will you join me?”. This statement is an effective conclusion because it makes a lasting impression.
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3. Energy information Potential energy of reactants is 250 KJ/mole
Activation energy is 200 KJ/mole
Potential energy of products is 10 KJ/mole
a. HAND DRAW an energy diagram- please label all the parts and axis.
b. Is the reaction exothermic or endothermic? EXPLAIN HOW YOU KNOW
c. How could you lower the activation energy?
Answers
a. The Potential Energy (PE) of reactants is 250 KJ/mole. When the reactants are reacting, the Potential Energy is transformed into Kinetic Energy, which is also referred to as the Activation Energy (AE), and the PE of the products.
b. The potential energy diagram of the reaction is shown below. In this diagram, all axes, i.e. Y-axis (Potential Energy) and X-axis (reaction coordinates) have been labeled.
c. One may lower the activation energy (AE) of the reaction by using the following methods:
Temperature: The activation energy of an exothermic reaction decreases with increasing temperature.
Catalyst: A catalyst is a substance that reduces the activation energy of a reaction and increases the reaction rate. The catalyst's role is to provide a different reaction mechanism that has a lower activation energy.
Increasing the concentration of reactants: The rate of the reaction increases with an increase in the concentration of the reactants. Because an increase in the concentration of the reactants increases the frequency of their collisions, which also increases the chance of successful collisions.
Increasing surface area: The rate of the reaction also increases with an increase in the surface area of the reactants because more particles are exposed to collisions, which increases the frequency of successful collisions.
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What is true of gas?
Answers
Answer:
Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. ... The particles exert more force on the interior volume of the container
Explanation:
Answer:
Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. ... The particles exert more force on the interior volume of the container.
Explanation:
While watching a popular space-based science fiction movie, space
vehicles loudly shoot each other with lasers and explode with a booming
sound. Students of science know that sound does not travel through
space and these movie scenes showing space sounds are factually
incorrect. Why are there no sounds in space?
Answers
Answer:
Sound waves required a medium.
Explanation:
In space, there is only vacuum hence no any medium for sound wave travel.
Since sound waves are mechanical waves, they require a material medium such as air, hence no sound transmission.
Answer: There is no air.
Explanation:
Because there is no air in space, there is no way for air to travel in space.
Air needs to push on your eardrums or air in general to move through space when there is no air your eardrums won’t move from the air making it quiet.
Suppose that 18.53 mL of 0.493 M Ca(OH)2 is required to neutralize 17.7 mL of aqueous HCl solution. What is the molar out of the HCl solution?
Answer in units of M.
Answers
The molar concentration of the HCl solution is 1.03 M.
StepsThe balanced chemical equation for the reaction between calcium hydroxide (Ca(OH)2) and hydrochloric acid (HCl) is:
\(Ca(OH)_2 + 2HCl -- > CaCl_2 + 2H_2O\)
From the equation, we can see that one mole of Ca(OH)₂ reacts with two moles of HCl. Therefore, the number of moles of HCl can be calculated as:
moles of HCl = moles of Ca(OH)₂ × 2
First, we need to determine the number of moles of Ca(OH)₂ :
moles of Ca(OH)₂ = concentration × volume
= 0.493 M × (18.53 mL / 1000 mL)
= 0.00912 moles
Next, we can calculate the number of moles of HCl:
moles of HCl = 0.00912 moles × 2
= 0.01824 moles
We can calculate the molarity of the HCl solution:
molarity of HCl = moles of HCl / volume of HCl
= 0.01824 moles / (17.7 mL / 1000 mL)
= 1.03 M
The molar concentration of the HCl solution is 1.03 M.
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Why is sublimation an effective technique for the isolation of pure caffeine?
Select one or more:
O The impurities of caffeine synthesis are expected to decompose at high temperatures.
O The purified caffeine will vaporize and can be collected as a solid, leaving impurities behind.
O When heated, caffeine will sublime at a lower temperature than it melts.
O The synthesis of caffeine tends not to produce impurities, so a more thorough purification technique is not needed.
Answers
Sublimation is an effective technique for the isolation of pure caffeine because: The purified caffeine will vaporize and can be collected as a solid, leaving impurities behind.
So, the answer is B.
Sublimation is a chemical technique that is used to isolate the pure form of a substance from impure or mixed form. It is the phase transition of a solid directly to a gas without passing through a liquid phase.
It is an effective technique for the isolation of pure caffeine due to the following reasons:During sublimation, the purified caffeine will vaporize and can be collected as a solid, leaving impurities behind.
The caffeine is heated, and the heat causes the solid to vaporize directly from the solid phase to the gas phase, skipping the liquid phase. Thus, it separates the caffeine from impurities and provides pure caffeine. Therefore, option B is correct.
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Lana balanced an equation so that the result was 2C2H3Br + 5O2 → 4CO2 + 2H2O + 2HBr. Which most likely represents the starting equation?
Answers
Answer:
C2H3Br + O2 → CO2 + H2O + HBr
Explanation:
The term balancing of chemical reaction equation has a unique meaning in chemistry. What it actually means is to ensure that the number of atoms of each element on the left hand side of reaction equation becomes equal to the number of atoms of the same element on the right hand side of the reaction equation.
When we look at the equation; C2H3Br + O2 → CO2 + H2O + HBr, the number of atoms of each element on the left and right hand sides of the given equation are not the same hence the equation is unbalanced.
If we look at the equation; 2C2H3Br + 5O2 → 4CO2 + 2H2O + 2HBr, the number of atoms of each element on both sides of the reaction equation are now equal, thus the later equation is the balanced version of the former.
Answer:
C2H3Br + O2 → CO2 + H2O + HBr
Explanation:
PLEASEE HELPPP
what is the ph of 1.0 times 10^-2 M HBr
Answers
Answer:
The pH of a solution with the [H + ] = 1 × 10 -2 M is 2 and the pH of a solution with the [H + ] = 1 × 10 -10 M is 10. ( I think this is correct ).
Explanation:
Can you help me with my question
Answers
Answer:
A
Explanation:
DNA and RNA being nucleic acids are proteins in nature hence same theory but just modified.
Which two conditions can cause water or liquids to backflow into a water system?
a) Valvue maintenance and Pump Maintenance
b) Service Leak and Water Hammer
c) Backsiphonage and Cross-Connection
d) Backsiphonage and Backpressure
Answers
The two conditions that can cause water or liquids to backflow into a water system are back siphonage and back pressure. Option (d) is the correct answer.
Back siphonage occurs when there is a sudden decrease in water pressure in the water supply system, causing the water to flow in the opposite direction, leading to backflow. This can happen when there is a break in the main water supply line, or when there is a sudden high demand for water, such as during firefighting activities. Backpressure, on the other hand, occurs when the pressure in the downstream water system is higher than the pressure in the upstream water system.
This can happen when a pump is connected directly to a potable water system without proper backflow prevention devices or when a boiler or other heating device is connected to a water system without proper safety valves. Both of these conditions can result in contaminated or unsafe water entering the potable water supply, leading to health hazards and water quality issues. It is important to have proper backflow prevention devices installed and regularly maintained to prevent such occurrences.
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CAN ANYONE TELL THE ANSWER
Answers
When water falls from great heights, its potential energy transforms to kinetic energy and this energy is converted electrical energy by power generators which produce a heat energy also. Thus, option b is correct.
What is energy transformation?One form of energy can be transformed to the other form naturally or mechanically. When a body is at rest, it possess potential energy. When it starts to move potential energy convert to kinetic energy.
When water falls from great heights it acquires more kinetic energy and it can be converted to electrical energy using turbines where some energy is lost as heat energy.
Therefore, the heat energy produced by the mechanical work of the turbine make the water heated. Hence, option b is correct.
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Which of these is an example of how engineers have contributed to society?
A. Our current understanding of viruses
B. Nomadic tribes traveling in search of food to hunt and gather
C. The theoretical mathematics describing the orbits of planets
around the sun
D. The seven-mile bridge that spans across the Gulf of Mexico to
connect two cities of the Florida Keys
Answers
An example of how engineers have contributed to society is option D. The seven-mile bridge that spans across the Gulf of Mexico to connect two cities of the Florida Keys.
It is an example of how engineers have contributed to society. Engineers played a crucial role in designing, planning, and constructing the bridge, which provides an essential transportation link between the two cities.
The bridge enables efficient and safe travel, connecting communities, promoting economic development, and improving accessibility for residents and visitors. Engineering expertise is necessary to address various challenges such as designing a structure capable of withstanding environmental conditions, ensuring structural integrity, and incorporating appropriate safety measures.
This example showcases how engineers contribute to society by creating infrastructure that enhances connectivity and supports the growth and well-being of communities. The correct answer is option d.
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) which one of the following is most soluble in hexane, c6h14? a) ch3-o-ch3 b) ch3ch2ch3 c) ch3ch2oh d) ch3oh
Answers
The molecule that is most soluble in hexane (C6H14) is option B, CH3CH2CH3 (propane). This is because hexane is a non-polar solvent and propane is also a non-polar molecule, so they can mix well together. The other options (A, C, and D) are polar molecules and will not dissolve well in hexane.
Based on the principle "like dissolves like," the most soluble substance in hexane (C6H14) would be the one with a similar structure and non-polar properties. Among the given options, b) CH3CH2CH3 (propane) would be the most soluble in hexane due to its non-polar, hydrocarbon nature.
Hexane is a nonpolar solvent, which means it primarily dissolves nonpolar substances. It has low solubility for polar compounds due to the lack of polar interactions.
In general, substances with nonpolar characteristics, such as hydrocarbons and other nonpolar organic compounds, are soluble in hexane. This includes many organic solvents, oils, fats, and waxes.
However, polar substances like water, alcohols, and most inorganic salts are not soluble in hexane. The polar nature of these compounds prevents them from effectively interacting with the nonpolar hexane molecules.
It's important to note that solubility can vary depending on the specific compound in question. While hexane is generally a good solvent for nonpolar substances, the solubility of a particular compound should be determined experimentally or referenced from reliable sources such as solubility tables or databases.
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Select the most likely product for this reaction: upper k subscript 2 upper c upper o subscript 3 (a q) plus upper c upper o subscript 2 (g) right arrow question mark. k2co3(aq) h2o(l) k(s) h2(g) o2(g) k(s) co3(g) h2
Answers
The most likely product for this reaction will be A. K2CO3(aq) + H20(l).
What is a chemical reaction?It should be noted that a chemical reaction simply means a process where one or more substance which are known as the reactants are converted to another substance which is the product.
In this case, the most likely product for this reaction will be K2CO3(aq) + H20(l). It should be noted that the products are the result of the chemical reaction that is gotten from the reaction. It's the rearrangement of the reactants.
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Answer:The most likely product for this reaction will be A. K2CO3(aq) + H20(l).
Explanation:
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objectives(s):
In your own words, what is the purpose of this lab?
Hypothesis:
In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.
Data:
Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.
Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One
Moon Two
Planet One
Planet Two
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?
Answers
Answer:
I don't no this answer do you know then telle
(01.02 LC) Which of the following is the unit of length in the metric system?
Group of answer choices
A:Foot
B:Inch
C:Meter
D.Mile
Answers
Answer:
Meter.
Explanation:
A foot is a American standard. Inch is also. A Mile is for a American. Kilometers are the metric. That leaves only the Meter.
A reaction yields 6.26 grams of a CuCl2. What is the percent yield of CuCl2 if the theoretical yield is 18.81g?
% Yield = (Actual Yield/Theoretical Yield) x 100
Answers
Answer:
33% yield
Explanation:
6.26/18.81 =0.33280170122 = 33%
Given the reaction:
NH3(g) + H2O() NH4+(aq) + OH–(aq)
Which is the conjugate acid-base pair?
A) H2O() and NH4+(aq)
B) H2O() and NH3(g)
C) NH3(g) and OH–(aq)
D) NH3(g) and NH4+(aq)