Propane is a gas used for cooking and heating. How many atoms are in 2.12 mol of propane (C₂H₂) Hint: 1 molecule C,H, 11 atoms (3 C and 8 H)
Answers
Answer:
Explanation:
First, let's determine the formula for propane. Propane has 3 carbon atoms and 8 hydrogen atoms.
CH₃CH₂CH₃
Second, use the number of moles of propane given in the problem (2.12 moles) and the formula for propane.
2.12 mol CH₃CH₂CH₃
Third, take 2.12 times the number of carbon atoms and the number of hydrogen atoms in propane.
There are 3 carbon atoms and 8 hydrogen atoms in propane.
2.12 x 3 carbon atoms = 6.36 carbon atoms
2.12 x 8 hydrogen atoms = 16.96 hydrogen atoms
Related Questions
What’s a element that is a metal, contains 1 valance electron, 3 energy levels?
Answers
Explanation:
Sodium is the element having one valance electron and 3 energy level and is a metal.Its atomic number is 11 .So in first energy level ,there is 2 electrons ,in second energy level,there is 8 electrons and in third energy level,there is one electron.The one electron in the third energy level is called valance electron and it is a metal in the sence it has only one valance electron and it can easily loose it and gain +ve charge.
What Group is this element in?
Please answer （＾∇＾）
Answers
which process are the products of the reaction glucose and oxygen?
A.
Photosynthesis
B.
Aerobic cellular respiration
C.
Lactic acid fermentation
D.
Alcoholic fermentation
Answers
Answer:
b
Explanation:
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the region of the atmosphere that is so evenly mxed that it behaves as if it were a single gas is the
Answers
The region of the atmosphere that is so evenly mixed that it behaves as if it were a single gas is called the homosphere.
The homosphere is the region of the Earth's atmosphere where the composition of gases remains relatively constant and well-mixed. In this region, gases are thoroughly mixed by atmospheric circulation, diffusion, and other processes, resulting in a relatively uniform composition throughout.
In the homosphere, the main gases present include nitrogen (N2), oxygen (O2), and trace amounts of other gases such as carbon dioxide (CO2), argon (Ar), and water vapor (H2O). These gases are distributed fairly evenly and do not exhibit significant variations in concentration with altitude.
The homosphere extends from the Earth's surface up to an altitude of approximately 80-100 kilometers (depending on various factors such as latitude and solar activity). Within this region, temperature and pressure decrease with increasing altitude, but the composition of gases remains relatively constant.
Above the homosphere, there is a transition region known as the heterosphere, where the composition of gases begins to stratify based on their molecular weights. In the heterosphere, lighter gases such as hydrogen (H2) and helium (He) are more abundant at higher altitudes due to their lower molecular weights.
Understanding the homosphere and its well-mixed nature is important for studying atmospheric processes, including air pollution, climate change, and the distribution of gases essential for life on Earth.
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Don’t really know what to do or how to solve it
Answers
The pressure is 36.9 kPa
The pOH is 10.78
The two stock solutions needed are pH = 10.00 and pH = 14.00
What is the ideal gas equation?Using;
PV = nRT
where:
P = pressure of the gas (in Pa or atm)
V = volume of the gas (in m³ or L)
n = number of moles of the gas
R = gas constant
T = temperature of the gas (in K)
\(P = nRT/V\\P = 0.15 * 8.31 * 264/8.9\\P = 36.9 kPa\)
\(pOH= -log[OH^-]\\= -log(1.66 * 10^-11)\\= 10.78\)
The ideal gas equation describes the relationship between pressure, volume, temperature, and the number of moles of a gas in a closed system.
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the intercalated disk is not a site of __________.
Answers
The intercalated disk is not a site of electrical isolation. It is a specialized structure found in cardiac muscle tissue, particularly in the walls of the heart. It plays a crucial role in coordinating the contraction of cardiac muscle cells, allowing the heart to pump effectively.
The intercalated disk contains gap junctions, which are channels that allow for direct electrical and chemical communication between adjacent cardiac muscle cells. This enables the rapid spread of electrical impulses throughout the heart, ensuring synchronized contractions.
While the intercalated disk facilitates electrical and mechanical coupling between cardiac muscle cells, it is not involved in electrical isolation.
In fact, the presence of gap junctions in the intercalated disk promotes electrical continuity and coordination, essential for the proper functioning of the heart.
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describe un modelo matemático para representar lo que sucede en cada una de las reacciones químicas (incluye toda la simbología que puedas) y clasifícalas según consideres de acuerdo con lo abordado en el tema.
1. El hidrógeno molecular reacciona con el oxígeno molecular y produce agua
2. El Óxido de calcio reacciona con el agua y produce hidróxido de calcio
3. El sulfuro de hierro (II) se produce cuando reacciona el azufre y el hierro en su forma atómica
4. El ácido sulfuroso se descompone por la acción de calor en dióxido de azufre gaseoso y agua
5. El carbonato de calcio se descompone por la acción de calor en oxido de calcio y dióxido de carbono gaseoso.
6. El magnesio reacciona con el ácido clorhídrico y produce dióxido de magnesio e hidrógeno gaseoso.
AYUDAAAAA
Answers
Responder:
2H2 + O2 → 2H2O
CaO + H2O → Ca (OH) 2
Fe + S → FeS
H2SO3 → SO2 + H2O
CaCO3 → CaO + CO2
Explicación:
2H2 + O2 → 2H2O
2 moléculas de hidrógeno gaseoso reaccionan con oxigente para producir 2 moléculas de agua
CaO + H2O → Ca (OH) 2
El óxido de calcio reacciona con el agua para producir hidróxido de calcio.
Fe + S → FeS
El hierro reacciona con el azufre para producir sulfuro de hierro.
H2SO3 → SO2 + H2O
Por descomposición, el ácido sulfuroso se descompone para producir dióxido de azufre y agua.
CaCO3 → CaO + CO2
El carbonato de calcio se descompone para producir óxido de calcio y dióxido de carbono.
A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy level?(1 point) Responses zero in the first energy level, eight in the second energy level zero in the first energy level, eight in the second energy level eight in the first energy level, zero in the second energy level eight in the first energy level, zero in the second energy level two in the first energy level, six in the second energy level two in the first energy level, six in the second energy level four in the first energy level, four in the second energy level
Answers
zero in the second energy level eight in the first energy level electrons are in each energy level
What energy level is the first?Nearest to the nucleus is the first energy level. It is a bit further to the second energy level than to the first. The distance between the third and the second increases, and so on. A varied number of electrons may fit into or "hold" each energy level before more electrons start to enter the next level.
It is how electrons are arranged within an atom's different shells, subshells, and orbitals. The numbers are 2, 8, 8, 18, 18, and 32. It is represented by the formula nlx, where n stands for the main quantum number, l for the azimuthal quantum number or subshell, and x for the total number of electrons.
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a 1) How would you make 1 liter of a 10% NaCl solution from a solid stock? Provide details of what kind of containers you would use.
Answers
To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.
Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.
Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.
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an object weighing 9.6 g is placed in a graduated cylinder containing 15 ml of water, and the water rises to 30 ml. If the mass of the object is 54g, what is the density of the object?
Answers
Answer:
1.8 g/ml
Explanation:
density = mass/volume
d = 54/30
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Answers
What is that is a link?
okay hi im jaysin my insta is iceking.cos
The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy E
a
=74.0kl/mol. If the rate constant of this reaction is 1.8×10
−4
M
−1
−s
−1
at 8.0
∘
C, what will the rate constant be at 32.0
∘
C ? Round your answer to 2 significant digits.
Answers
The rate constant of a certain reaction obeys the Arrhenius equation. The activation energy is E a= 74.0 kJ/mol. The rate constant of the reaction is known to be 1.8 104 M1s1 at 8.0 °C.
We need to determine the rate constant at 32.0 °C. Round your answer to two significant digits. The Arrhenius equation is as follows:k = Ae (-Ea/RT)
Where
k = rate constant
A = pre-exponential factor
Ea = activation energy
R = gas constant
T = temperature
We can use the Arrhenius equation to calculate the rate constant at 32.0 °C as follows:
ln(k2/k1)
= (-Ea/R) (1/T2 - 1/T1)
Substitute the values
,ln(k2/1.8×10−4)
= (-74.0 kJ/mol) (1/(0.008314 kJ/mol K) ) [1/305 K–1/281 K]
Solve for k2, k2 = 2.5 × 10-3 M-1s-1
Therefore, the rate constant at 32.0 C is 2.5 × 10-3 M-1s1.
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I'm just looking for someone to check my answers on this and correct me if I'm wrong :)This is the question:You have three elements, A, B, and C, with the following electronegativity values:A = 0.9B = 3.0C = 3.5You react the elements to form the substances AB, AC, and BC. Answer the following questions:What type of substance is AB? What types of bonds are present? Explain your answer.What type of substance is AC? What types of bonds are present? Explain your answer.What type of substance is BC? What types of bonds are present? Explain your answer.If any of the substances are ionic compounds, which element is the cation and which is the anion? Explain your answer.And these are my answers:AB is a compound. It'd be an ionic compound because the electronegativity is different in each.AC is a compound. It'd be an ionic compound because the electronegativity is different in each.BC is a compound, but the bond between them is covalent.AB is an ionic compound. A is the cation and B is the anion because the element with lower electronegativity is the cation and the element with the higher electronegativity is the anion.
Answers
Answer:
Explanations:
Given the following electronegativity of three elements as:
Nitrogen dioxide is one of the many oxides of nitrogen (often form another form of NOx, dinitrogen tetroxide A chemical engineer studying this reaction fils a 500. ML flask at 7. 9 °C with 4. 9 atm of nitrogen dioxide gas. He thèn raises the temperature considerably and when the mixture has come to equilibrium determines that it contains 2. 7 atm of nitrogen dioxide gas The engineer then adds another 1. 2 atm of nitrogen dioxide, and allows the mixture to come to equilibrium again. Calculate the pressure of dinitrogen tetroxide after equilibrium is reached the second time. Round your answer to 2 significant digits collectively called·N ' that are of interest to atmospheric chemistry. It can eact with ter to 囲 atm □-10 I Don't Know Submit
Answers
When the engineer adds an additional 1.2 atm of nitrogen dioxide, the total pressure of the mixture is 4.9 atm + 1.2 atm = 6.1 atm. At equilibrium, the pressure of dinitrogen tetroxide is approximately 2.3 atm.
This is calculated by subtracting the equilibrium pressure of nitrogen dioxide (2.7 atm) from the total pressure of the system (6.1 atm). Therefore, after equilibrium is reached the second time, the pressure of dinitrogen tetroxide is 2.3 atm.
When nitrogen dioxide gas is added to a system, the equilibrium pressure of dinitrogen tetroxide is determined by Le Chatelier's principle. This principle states that when a system is disturbed from equilibrium, it will shift to re-establish equilibrium.
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What volume would be needed to prepare 375 mL of a .45 M CaCl2 using only a solution of 1.0 M CaCl2 and water?
Answers
Answer:
168.75 ml
Explanation:
M1V1=M2V2
375ml*.45M=1M*V2
4. sawiro Lead is used to protect your torso during dental x-rays. 5. Lead is also used in car batteries. EXERCISE 1. Define carbon family 2. Where is the position of carbon family in the periodic table? 3. Write at least three physical properties of carbon family. 4. State at least three common uses of carbon family. 5. Choose two elements from carbon family and write notes about them. 1. 2. 3
Answers
The answer response are:
Lead is used to protect during dental x-rays and in car batteries.Lead has multiple uses and applications.The carbon family is a group of elements in the periodic table with similar chemical properties.The carbon family is located in Group 14 of the periodic table.Physical properties of the carbon family include having four valence electrons, a solid state at room temperature, and being non-metallic.Common uses of the carbon family include the production of semiconductors, alloys, and ceramics.Silicon is used in the production of computer chips and solar panels, while carbon is used in the production of graphite and diamond.What are the statements about?Lead is a metal that is commonly used in various applications, including protecting against radiation in dental x-rays and as a component in car batteries. The carbon family, located in Group 14 of the periodic table, includes elements such as carbon, silicon, and germanium. These elements have similar chemical properties and physical characteristics such as having four valence electrons, being non-metallic, etc.
Therefore, Some common uses of the carbon family include the production of semiconductors, alloys, and ceramics. Silicon, for example, is used in the production of computer chips and solar panels, while carbon is used in the production of graphite and diamond. Understanding the properties and applications of these elements can have important implications for various fields such as engineering, materials science, and environmental health.
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calculate the molarity of 1.75l o2 in 0.375l h2o.
Answers
It is not possible to calculate the molarity of oxygen in water based on the given information.
To calculate the molarity of a solute in a solution, we need to know the number of moles of the solute and the volume of the solution.The problem statement provides the volume of oxygen gas (1.75 L) but does not provide information on the number of moles of oxygen gas or the volume of water.
Additionally, we would need to know if any oxygen gas has actually dissolved in the water to form a solution.Therefore, we cannot calculate the molarity of oxygen in water based on the given information.
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Which of the following signs of a chemical reactioi
are observed in the reaction of potassium with
water?
precipitate formed
temperature change
smell produced
gas produced
color change
The answer is temperature change, gas produced, and color change
Answers
Answer:
temperature change
color change
Gas produced
Answer:
B: temperature change
D: gas produced
E: color change
6. I have a mixture of tomato sauce,
sugar, and carrots. I bring a
magnet close by. What does the
magnet pick up and what is left
behind?
Answers
Answer:
All the items in the mixture will not be picked up by the magnet and therefore, all of them would be left behind
Explanation:
Ferromagnetic materials are materials that can become magnetized and are also readily attracted to a magnet or by a magnetic field. Examples of ferromagnetic materials includes, iron, cobalt, and nickel, and their alloys
Ferromagnetic materials are mainly metals while all materials exhibit some form of magnetism including diamagnetism and paramagnetism, but these are not the type of magnetism seen in everyday life
Therefore, since neither of the tomato sauce mixture, the sugar or the carrots are not ferromagnetic materials none of them will be picked up by the magnet.
Which statement is most likely true?
Ernest Rutherford’s experiment led to the nuclear model of the atom.
Ernest Rutherford’s experiment established the plum pudding model of the atom.
Robert Millikan’s postulates form the most accepted theory for the atomic structure.
Robert Millikan’s results had little impact on determining of the charge of an electron.
Answers
Answer : Option A) Ernest Rutherford’s experiment led to the nuclear model of the atom.
Answer:
A: Ernest Rutherford’s experiment led to the nuclear model of the atom.
Explanation:
What is the volume of a 492.2g sample of Kr gas?
0.007601 L
131.6 L
5.870 L
21.97 L
Answers
Answer:
131.6 L
Explanation:
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the correct option is option B that is 131.5l. There is no force of attraction between the particles.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal behave as ideal gas at high temperature and low pressure.
Mathematically,
PV=nRT
where,
P = pressure=1 atm
V= volume=?
n =number of moles=given mass/ molar mass
= 492.2/ 83.79
= 5.87 moles
T =temperature = 273K
R = Gas constant = 0.0821 L.atm/K.mol
1× V = 5.87 × 0.0821 L.atm/K.mol × 273 K
V =131.5l
131.5l is the volume of a 492.2g sample of Kr gas.
Therefore, the correct option is option B that is 131.5l.
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a railroad car with a mass of 90,000 kg is traveling along a straight, horizontal track at a constant speed of 2 m/s. the car collides with a second railroad car, also with a of 90,000 kg that is initially at rest. The railroad cars stick together after the collision, as shown in the figure.
1) 0.5 m/s
2) 1 m/s
3) 2 m/s
Answers
Answer:
I think it's 2.
Explanation:
The weight should transfer half of it's velocity to the other one. or its 1
Subject: Earth Science
Explain the differences in structure and use for life between oxygen gas in the atmosphere and ozone.
(I would like a paragraph)
Answers
Answer:
The only difference is that ozone is made up of three oxygen atoms, while the stuff we breathe (molecular oxygen) is made up of only two atoms. Solar rays high in the atmosphere convert O2 to O3. In the upper atmosphere, rays from the Sun break a normal oxygen molecule into two separate oxygen atoms.
Step 7: Determine the Limiting Reactant (Trial 2)
50
Analysis: The limiting reactant(s) appeared to be
because ...
Answers
Answer:
aluminum
no aluminum is left over
Explanation:
the next answers for step 7 are 0.019, 0.0093, aluminum
Answer:
Aluminum because no aluminum is left over
Explanation:
what is the formulaa for H2O
Answers
Answer:
:)
Explanation:
Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.
Answer:
H2O
Explanation:
Thats the formula :P
Which of the following describes the net reaction that occurs
in the cell,
Cd Cd?*(1 MI Cu?* (1 M) Cu?
a. Cu + Cd?+ - Cu?+ + Cd
b. Cu + Cd - Cu?+ + Ca?+ c. Cu?* + Cd?* - Cu + Cd d. Cu?* + Cd - Cu + Cd?*
e. 2Cu+ Cd?+ > 2Cu* + Cd
Answers
The correct answer is e. The net reaction that occurs in the cell involves the oxidation of copper (Cu) to form copper ions (Cu+), and the reduction of cadmium ions (Cd2+) to form cadmium metal (Cd). This is represented by the equation: 2Cu+ Cd2+ > 2Cu* + Cd.
In this reaction, Cu+ is the oxidizing agent, as it gains electrons and becomes reduced, while Cd2+ is the reducing agent, as it loses electrons and becomes oxidized. This reaction can be used to generate electrical energy in a cell, such as a battery. Overall, the net reaction involves the transfer of electrons from one species to another, resulting in the formation of a metal and an ion.
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Titanium metal will react with liquid water to form solid titanium (IV) oxide and hydrogen gas. How many moles of titanium will be needed to fully react with 12.0 moles of water?
Answers
Answer:
Total we want 48 titanium to make 12.0moles
Which of the following is not a work practice control when working with corrosive materials:Group of answer choicesUse corrosive resistance containers such as glass or plasticWhen diluting, add water to acid, never vice versaStore acids separate from basesWhen pouring large volumes of corrosive liquids, use a fume hoodUtilize personal protective equipment when working with corrosive materials
Answers
Answer:
H
Explanation:
because the thing goes there and that goes there
The work practice control that is not directly related to working with corrosive materials is Utilize personal protective equipment when working with corrosive materials.
The correct option is D.
While personal protective equipment (PPE) is an important safety measure when working with corrosive materials, it is not specifically a "work practice control." The other options mentioned are examples of work practice controls that involve specific actions and procedures to mitigate the risks associated with handling corrosive materials.
Work practice controls are measures or practices that are put in place to minimize exposure to hazards in the workplace. The options like using corrosive-resistant containers, storing acids separately, adding water to acid while diluting, and using a fume hood when pouring large volumes are all examples of work practice controls aimed at reducing the risks associated with working with corrosive materials.
Hence , D is the correct option
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How are birds and mammals characterized?
Answers
Answer:
Vertebrates: both birds and mammals are vertebrates, which means that they have backbones.
Explanation:
Water 3.0 deals mainly with sewage treatment.
Describe which chemicals are currently not broken down by currently
used wastewater technologies and why that is important.
Answers
Water 3.0 deals mainly with sewage treatment. The primary aim of this project is to reduce the harmful impacts of chemical pollutants from industrial and agricultural activities on natural water resources.
Currently, used wastewater treatment technologies can break down some of the chemicals in wastewater but not all of them. Chemicals that are not broken down are referred to as persistent organic pollutants. These chemicals persist in the environment for long periods, and they can cause severe damage to aquatic life and human health.
Currently, the primary challenge facing water treatment technologies is the removal of persistent organic pollutants such as pesticides, pharmaceuticals, and endocrine-disrupting chemicals from wastewater.
These pollutants are generally water-soluble and resist microbial degradation, making them hard to remove from wastewater using current water treatment technologies. For example, conventional activated sludge treatment used in wastewater treatment plants does not remove some persistent organic pollutants from wastewater.
Failure to remove these pollutants from wastewater can have significant environmental and health impacts.
For example, pharmaceutical chemicals can cause antibiotic resistance, while endocrine-disrupting chemicals can cause birth defects, cancer, and other health problems.
Therefore, there is a need to improve wastewater treatment technologies to remove persistent organic pollutants from wastewater.
In conclusion, wastewater treatment technologies can break down some chemicals but not all. Chemicals that are not broken down are persistent organic pollutants and pose a significant risk to the environment and human health. Therefore, it is important to develop wastewater treatment technologies that can remove these pollutants from wastewater.
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