0%
Explanation:
IF YOU BURNED THE PAPER THERE WILL BE ONLY ASHES
which Substance can be used to Neutralize nitric acid? A Acetic acid C Hydrogen peroxide b milk of magnesia D Ethanol
Answer:B
Explanation:
Hbr(aq) h2o(l)→h3o (aq) br−(aq) express your answers as a chemical expressions. enter your answers in order given in the question separated by commas.
Hbr(aq) h2o(l)→h3o (aq) (aq) br−(aq) Write your responses in chemical terms. Enter your responses using commas to separate them in the question's sequence. Compound acid - H3O+, Composite base - Br-, Bronsted-lowry acid - HBr, and Brønsted - lowry bases - H2O.
Any material with a different compositions is a chemical. To put it another way, every chemical always consists with same "stuff." There are some substances in nature, like water. Other chemicals, including chlorine, are produced Covalent compounds hold together molecules, ionic compounds hold together ions, metallic bonds keep together intermetallic compounds, and coordinate covalent bonds hold coordination complexes together.
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How many moles of Ba(NO3)2 are there in 0. 25 L of a 2. 00 M Ba(NO3)2 solution? Use Molarity equals StartFraction moles of solute over liters of solution EndFraction. 0. 13 mol 0. 50 mol 2. 25 mol 8. 0 mol.
The moles of barium nitrate in the solution has been 0.5 mol. Thus, the correct option is B.
Molarity has been defined as the moles of substance in a liter of solution. Molarity has been expressed as:
\(\rm Molarity=\dfrac{Moles}{Volume} \)
Computation for moles of Barium nitrateThe given barium nitrate solution has the volume of 0.25 L.
The molarity of the solution has been 2 M.
Substituting the values for the moles of Barium nitrate
\(\rm 2=\dfrac{Moles}{0.25}\\ Moles=2\;\times\;0.25\;mol\\ Moles=0.5\;mol\)
The moles of barium nitrate in the solution has been 0.5 mol. Thus, the correct option is B.
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the water in a beaker has a volume of 50 millimeters, is this an extensive property?
No, the volume of water in a beaker is not an extensive property.
Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.
In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.
Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.
It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.
In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.
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Reading Check
Check your understanding by answering the question below.
In(BLANK)
a general idea is used to draw specific conclusions.
Drawing conclusions is the process of making sense of information that has been hinted at or implied. As a result, the information is seldom given in an obvious way.
What does "draw a conclusion" mean?To arrive at trustworthy findings, careful evidence collecting, analysis, and judgements that can withstand scrutiny are required. As an author, you are presenting your findings for readers to assess, thus you must be compelling based on the information you present in your piece.
Posing a sound question, formulating a working hypothesis, conducting research, identifying and controlling factors, recording observations during testing, gathering data, and drawing conclusions are all necessary steps. If you use spec sheets, diagrams, and graphs, your results are simpler to organise and present.
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A 30g piece of metal absorbs 1,200 joules of heat energy, and its
temperature changes from 25°C to 175°C. Calculate the specific capacity of
the metal. What is the likely metal?
Answer:
Niobium (Columbium)
Explanation:
Specific heat capacity has the units J/(kg °C). To find the heat capacity, all we need to do is organize the values so the units match up.
1200 J / (0.03 kg * 150°C) = 266.67 or 267 J/(kg °C)
The closest metal to a 267 heat capacity is Niobium I believe.
A sample of iron receives 50 J of heat energy that raises the temperature of the iron to a delta T of 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?
(Show working out)
Answer: 20 g
Explanation: heat received Q = m c dT
Q= 50J , dT= 25 C anc c= 0.10 J / g C
And m = Q / c dT
The mass of the iron sample that received the heat is determined as 20 g.
Mass of the iron sampleThe mass of the iron sample is calculated as follows;
Q = mcΔT
where;
m is mass of the iron sampleC is the specific heat capacityΔT is change in temperaturem = Q/cΔT
m = (50) / (0.1 x 25)
m = 20 g
Thus, the mass of the iron sample that received the heat is determined as 20 g.
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Three students are asked to discuss the sources of error that might have affected the outcome of the lab. Select the student that employs correct scientific reasoning.
Student 1: If the spot was placed below the solvent level, this would cause the sample to be dissolved into the solvent pool before traveling up the plate.
Student 2: If the solvent used has the opposite polarity of the stationary phase this will cause unequal movement of the sample.
Student 3: If the developing chamber was closed too quickly than the sample wouldn't be able to travel on the TLC plate.
Student 1 is correct. He discovered the mistake as;
If the spot was placed below the solvent level, this would cause the sample to be dissolved into the solvent pool before traveling up the plate.
TLC should be positioned so that just the lowest edge of the plate touches the solvent.
Differential affinities (strength of adhesion) of the analyte components towards the stationary and mobile phases result in differential separation of the components. Affinity, in turn, is determined by two molecular properties: adsorption and solubility.
Adsorption is the property of how well a component of a mixture clings to the stationary phase, whereas solubility is the quality of how well a component of a mixture dissolves in the mobile phase.
The greater the adsorption to the stationary phase, the slower the molecule will move across the column.
The more the molecule adsorbs to the stationary phase, the slower it moves across the column.
The greater the molecule's solubility in the mobile phase, the faster it will travel across the column.
Thus, Student 1 is correct. He detected the error by placing the area below the solvent level, which caused the sample to disintegrate into the solvent pool before migrating up the plate.
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KClO₃ → Kelt Oz
1. Potassium chlorate is decomposed to form potassium chloride and oxygen gas. How many
moles of potassium chlorate are needed to produce 7.8 moles of oxygen?
Answer:
5.2 moles of KClO₃ are needed
Explanation:
Given data:
Number of moles of potassium chlorate needed = ?
Number of moles of O₂ formed = 7.8 mol
Solution:
Chemical equation:
2KClO₃ → 2KCl + 3O₂
now we will compare the moles of KClO₃ and O₂.
O₂ : KClO₃
3 : 2
7.8 : 2/3×7.8 = 5.2
5.2 moles of KClO₃ are needed.
Which statement provides the best example of a scientific conclusion?
O A. Graphite can be used to make pencils.
O B. Diamond is mined in South Africa
O C. Diamond and graphite are both composed of carbon.
D. Diamond jewelry is prettier than graphite jewelry.
Answer:
c
Explanation:
In science, there is always processing of an item or sample to get an end product. So if the diamond is mined; there is a processing stage used to come out with the final product as Diamond through carbon in the heating process
Why is the temperature of the liquid in the flask on the previous page measured when the liquid in the thermometer has stopped rising?.
The temperature of the liquid in the flask on the previous page measured when the liquid in the thermometer has stopped rising to measure confirmed or fixed temperature.
When the liquid in the flask is heated, its temperature rises, and when a thermometer is inserted into the flask to gauge the liquid's temperature, the liquid within the thermometer also begins to warm up.
The temperature of the liquid rises as a result of heat being transferred from a high temperature to a low temperature until the temperatures are equal. Therefore, when the liquid stops rising, both are at the same temperature, and this is how the liquid in the flask is being measured.
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Which of the following statements about buffers is false? a) a buffer resists changes in pH upon addition of small amounts of strong acids and bases b) a buffer solution can react with either HjOor OH ions c) a buffer solution resists change in pH upon small dilutions d) a buffer always consists of a weak acid and a soluble ionic salt of the weak acid e) most body fluids contain natural buffer systems
The false statement about buffers is: d) a buffer always consists of a weak acid and a soluble ionic salt of the weak acid.
Buffers are solutions that can resist changes in pH when small amounts of acids or bases are added. They typically consist of a weak acid and its conjugate base (or a weak base and its conjugate acid). The weak acid and its conjugate base are present in equilibrium, allowing the buffer to accept or donate protons to maintain a relatively constant pH. Option d is false because a buffer can consist of a weak acid and its conjugate base, or a weak base and its conjugate acid. It is not necessary for a buffer to always include a soluble ionic salt.
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What is the compound Cu₂SO4 called?
Answer:
Cu2SO4 is referred to as copper sulphate
Cosmic background radiation is:
O High energy radiation from black holes.
O Leftover radiation from the big bang.
O The part of the electromagnetic spectrum after ultraviolet.
O Radiation that can cause sunburns.
Cosmic background radiation is Leftover radiation from the big bang.
What is Cosmic radiation?
When primary photons and particles from outside of the solar system interact with elements of the earth's atmosphere, cosmic radiation, an ionising radiation, is created. The sun's discharge of charged particles, also known as solar flares or "sun storms," is a secondary source of cosmic radiation. The environment in which we live naturally contains ionising radiation, which can be found in the soil, structures, food we eat, and even the bones in our bodies.
Nonionizing radiation, which also includes UV light, radio waves, as well as microwaves, is the other type. Natural radiation has been present in the environment where humans, animals, as well as plants have all evolved, and, with very few exceptions, it poses little danger to human health.
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2. How are genes related to organisms’ traits?
Type your answer here: genes carry the information that determines your traits
Experimental Methods
3. Describe the procedure that you followed to test the paper airplanes.
Type your answer here:
Data and Observations
4. Record your observations in the data table.
Type your answer here:
Table 1. Distance Travelled by Paper Airplanes Released from the Same Height
Airplane Qualitative distance travelled compared to airplane 1 (greater, shorter, equal)
Trial 1 Qualitative distance travelled compared to airplane 1 (greater, shorter, equal)
Trial 2 Qualitative distance travelled compared to airplane 1 (greater, shorter, equal)
Trial 3
2
3
4
Conclusions
5. What conclusions can you draw about how structural changes to genes (mutations) affect proteins and may result in harmful, beneficial, or neutral effects to the structure and function of the organism? Write an evidence-based claim that cites evidence from the results of the paper airplane test as a model.
Type your answer here:
6. Which fruit fly wing mutation(s) do you think is/are harmful to the fruit fly’s ability to fly? Explain by comparing the wing structure of the fly with the mutation to the wing structure of a fly without a mutation.
Type your answer here:
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- [ ]
Genes are related to organisms’ traits in that they carry the information that determines your traits.
The procedure to test the paper airplanes was by comparing the distances traveled by each plane.
The results of the paper airplane test illustrate the impact of mutations on protein function since changes to the shape and structure of a paper airplane can affect its flight performance, and changes to the structure of a protein can impact its function within an organism.
In fruit flies, mutations in the genes that control wing development can have significant impacts on the structure and function of the wings, which are critical for flight. For example, mutations that disrupt the formation of key wing structures such as veins or the wing margin may render the wings non-functional, leading to impaired flight ability.
What are the effects of muations on organisms?Structural changes to genes, known as mutations, can have a variety of effects on proteins and ultimately impact the structure and function of an organism. These changes can be harmful, beneficial, or neutral depending on the specific mutation and the gene or protein involved.
Mutations may alter the amino acid sequence of a protein, resulting in changes to its three-dimensional structure and function.
Harmful mutations may disrupt important protein interactions, rendering the protein non-functional or even toxic to the organism. Beneficial mutations may enhance the function of a protein or provide new functions altogether, leading to adaptations that increase an organism's fitness. Neutral mutations may have no discernible effect on protein structure or function and may accumulate over time as genetic variation in a population.Learn more about mutations at: https://brainly.com/question/17031191
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Mike Trout of the Los Angeles Angels has a contract worth $426,500,000. If you earn $100,000 per year, how many years would it take for you to earn what Mike Trout will earn from his contract?
Answer:
The number of years it would take you to earn what Mike Trout will earn on his contract is 4,265
Explanation:
Mike Trout of the Los Angeles Angels has a contract worth $426,500,000
On the other side, you earn $100,000 per year.
To calculate the number of years it would take for you to earn what Mike Trout will earn from his contract, you must divide the amount Mike earned by the amount you earned during a year:
$426,500,000 ÷ $100,000 per year= 4,265
The number of years it would take you to earn what Mike Trout will earn on his contract is 4,265
the gram staining procedure is best described as a(n) __ staining technique.
Answer:
differential
Explanation:
According to openstax.org, "Gram-staining is a differential staining technique that uses a primary stain and a secondary counterstain to distinguish between gram-positive and gram-negative bacteria."
A solution was found to have a 15. 6 % transmittance at 500 nm, its wavelength of maximum absorption, using a cell with a path length of 5. 00 cm. Calculate the absorbance of the solution in a 1. 00 cm cell at 500 nm.
Absorbance of the solution in a 1. 00 cm cell at 500 nm is 0.161
Absorption measure the amount of light of a particular wavelength that a particular substances block from passing and the two main factor that affect absorption are substances concentration and optical path length and the net absorption rate is calculated using the formula of the total vacant area at the beginning of the period plus square feet
Here given data is
Percentage transmittance of the sample = 15.6 %
Therefore absorbance 2 - log (%T) = 2 - log(15.6) = 0.8069
Then use beer's law :
A = ε×c×l
Where ε = molar absorptivity of the solution
c = concentration of the solution
l = path length of the solution
Then A = 0.8069 and l = 5.00 cm
0.8069 = ε×c×(5.00cm)
ε×c = 0.16138cm⁻¹
For the next part then assume that ε×c remain constant and we have
A' = ε×c×l where l = 1.00cm
Then put the values
A' = (0.16138cm⁻¹)×(1.00cm) = 0.16138
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Do the rocks get older or younger as you go away from the Mid Atlantic Ridge
towards the continents? Why? EXPLAIN.
Answer:
Rocks get older as we go away from the Mid Atlantic Ridge towards the continents
Explanation:
As the plates move away from each other, new ocean lithosphere is created at the ridge. This also widens the ocean basin and leads to sea floor spreading.
The rock of the ocean floor are symmetrically aligned and they get become older as they move away from the crest of the ridge.
Thus, rocks get older as we go away from the Mid Atlantic Ridge towards the continents
Which has the larger atomic radius Ga Or B
Answer:
Ga-135 is the largest atomic radius because B atomic radius is 85
Does the conductivity increase or decrease?
O It increases at first, then decreases.
O It continuously decreases
O It continuously increases
O lt decreases at first, then increases
Answer:
It continuously decreases.
Explanation:
the thermal motion makes the electrons to collide and disturb the free flow. Thus, conductivity is decreased.
3) What are the three types of sedimentary rocks?
Answer:
clastic, organic, and chemical
what happens when magnesium is burnt in air?
It forms magnesium oxide by reacting with oxygen
The balanced equation is provided by
\(\\ \rm\hookrightarrow 2Mg+O_2=2MgO\)
On both sides
Mg=2O=2Hence balanced
Question 55 Marks: 1 If sufficient amounts of activated carbon in the powdered form are used, practically all tastes and odors are removed from water byChoose one answer. a. absorption b. polymerization c. adsorption d. oxidation
If sufficient amounts of activated carbon in the powdered form are used, practically all tastes and odors can be removed from water by adsorption.
Why will be sufficient amounts of activated carbon in the powdered form are used?Activated carbon is a highly porous form of carbon that is treated with oxygen to open up millions of tiny pores between the carbon atoms. These pores increase the surface area of the carbon and make it an excellent adsorbent material.
When activated carbon is added to water, it adsorbs a wide range of organic and inorganic contaminants, including tastes and odors, onto its surface.
Adsorption is a process by which a substance in a fluid is attracted to and adheres to the surface of a solid. In the case of activated carbon, contaminants in the water are attracted to and adhere to the surface of the carbon pores.
The carbon pores are so small that they can trap molecules of various sizes, including those responsible for tastes and odors in water.
Activated carbon can be used in a variety of water treatment applications, including municipal water treatment, industrial water treatment, and home water filters.
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difference between electroplating and sacrificial protection
Answer:
Explanation:
Sacrificial protection is a corrosion protection method in which a more electrochemically active metal is electrically attached to a less active metal. The highly active metal donates electrons to replace those which may have been lost during oxidation of the protected metal.
Electroplating is a general name for processes that create a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current. The part to be coated acts as the cathode (negative electrode) of an electrolytic cell; the electrolyte is a solution of a salt of the metal to be coated; and the anode (positive electrode) is usually either a block of that metal, or of some inert conductive material. The current is provided by an external power supply.
which is renewable energy source?
A) oil
B) coal
C) solar
D) natural gas
correct answer is C)
Answer:
The renewable energy source among the options you provided is solar power (option C). Solar energy is derived from the sun and can be converted into electricity or used for heating and other applications. It is a clean and sustainable form of energy.
Explanation:
which of the following is a poor functional group for promoting covalent catalysis? a. the imidazole group of his b. the hydroxyl group of ser c. the sulfhydryl group of cys d. the hydroxyl group of tyr e. the amino group of lys
Imidazole group of Histidine is called as a poor functional group for promoting covalent catalysis because it doesn't participate in any reaction where a covalent modification on it occurs. Option (a) is correct.
Imidazole group is defined as an organic compound that has the formula C₃N₂H₄. It is called as a white or colorless solid which has the tendency to soluble in water producing a mildly alkaline solution. Imidazole group called as an aromatic heterocycle group that is classified as a diazole which has the nitrogen atoms in meta-substitution. Histidine is defined as an essential amino acid which has a positively charged imidazole functional group. The imidazole group makes the histidine a common participant in enzyme catalyzed reactions. The unprotonated imidazole group is generally serve as a common base of the reaction and the protonated form can serve as a common acid of the reaction.
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On a job application how should you list the schools you attended
Answer:
Usually, you should lay down your educational background by listing the most recent or advanced degree first, working in reverse chronological order. But there are exceptions. Say you earned a degree in geography, but are now working in the field of online marketing. If you more recently completed coursework specific to social media or digital marketing, list that first to grab the reviewer’s attention.
Explanation:
Answer:
Start with the most recent or advanced degree first, working in reverse chronological order.
Explanation:
How can these predictable winds, which scientists call "prevailing winds", help us predict whether a place will get precipitation?
Answer:
The direction of prevailing winds determines which type of air mass generally moves over an area. For illustration, a west wind might bring warm wettish air from over an ocean. An east wind might bring cold dry air from over a mountain range. Which wind prevails has a big effect on the climate
Prevailing winds are the result of atmospheric rotation cells. They impact the climate of a region.
Rising and sinking air can impact the rush of a region.
Atmospheric rotation cells produce the general climate of a region.
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What is the [HF] in a solution with a pOH of 12.5?
The concentration of the HF solution is 0.03.
What is the concentration?We know that the concentration has to do with the amount of the substance that is present in the system. We know that what we have is an acid hence we can only talk about the concentration of the acid if we can obtain the amount of the hydrogen ion.
We know that the acid is defined as any substance in which there is the presence of the hydrogen ion is what we call and acid. Since the hydrogen fluoride does have the hydrogen, we can say that the substance that we are dealing with here is an acid.
Thus;
pH = 14 - pOH
pOH = hydroxide ion concentration
pH = hydrogen ion concentration
pH = 14 - 12.5
= 1.5
[HF] = Antilog (-1.5)
= 0.03
The acid would have a concentration of 0.03.
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