Three elements, A, Q, and Z, have the molar masses indicated in the table below. Given a compound with a composition of 15.66% A and 84.34% Z by mass, what is the empirical formula of this compound? Remember to enter subscripts as normal numbers (ie H2O is entered as H2O) and to enter elements in the same order they were given.
element symbol molar mass
A 15.45 g/mol
Q 20.05 g/mol
Z 41.62 g/mol
Answers
The empirical formula of the compound containing 15.66% A and 84.34% Z as given from the question is AZ₂
Data obtained from the questionA = 15.66%Z = 84.34%Empirical formula =?How to determine the empirical formulaDivide by their molar mass
A = 15.66 / 15.45 = 1.014
Z = 84.34 / 41.62 = 2.026
Divide by the smallest
A = 1.014 / 1.014 = 1
Z = 2.026 / 1.014 = 2
Thus, the empirical formula of the compound is AZ₂
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Related Questions
Anders Celsius made the __________
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Periodic Table of the Elements
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Anders Celsius made the centigrade thermometer.
the fastest train on earth, the TGV in france, can travel 800 miles in 2.5. what is the speed?
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Answer:
s= 3.20 mph
Explanation:
s=t/d
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A species that has experienced a severe bottleneck event would be expected to _______. a. be better able to adapt to changing environmental pressures b. have few instances of inbreeding c. be more susceptible to disease and famine d. retain significant genetic diversity
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Answer:
hi the answer is C
Explanation:
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Answer:
be more susceptible to disease and famine
Explanation:
Describe the problem you have chosen to investigate. Plan your investigation and write out the steps in your procedure. Include a sketch of your set up. Explain how this procedure and set-up will help you investigate the problem.
Answer:
Answer both asap for brainliest
Carry out your experiment. Present evidence that you have carried out the experiment below. You may upload photos as evidence. Record your data in a chart. Be sure you have starting data and several data points. Analyze your results. You may want to present your data as a graph. Did the investigation you planned determine the relationships among temperature, the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample? How do you know? Use complete sentences and paragraph form for your analysis.
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Answer:
Six step guide to help you solve problems
Step 1: Identify and define the problem. State the problem as clearly as possible. ...
Step 2: Generate possible solutions. ...
Step 3: Evaluate alternatives. ...
Step 4: Decide on a solution. ...
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In IR spectroscopy, a primary amine will produce two signal(s) above 3300 cm-1, because the amino group ________________________.
Answers
A primary amine will produce two signal(s) above 3300 [tex]cm^1[/tex], because the amino group has two possible modes of stretching (symmetric and asymmetric)
What is IR?Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm).
The N-H stretches of amines are in the region 3300[tex]cm^1[/tex].
These bands are weaker and sharper than those of the alcohol O-H stretches which appear in the same region.
In primary amines ([tex]RNH_2[/tex]), there two bands in this region, the asymmetrical N-H stretch and the symmetrical N-H stretch.
Hence, In IR spectroscopy a primary amine will produce two signal(s) above 3300 cm-1, because the amino group has two possible modes of stretching (symmetric and asymmetric).
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24. Explain why a saturated solution is not necessarily a concentrated solution.
Answers
Answer:
A saturated solution may not be a concentrated solution IF the solute is only sparingly or slightly soluble in the solution.
Fill in the blanks to create the lesson question, which is the broad question about gases that Boyle’s law answers. You will explore this question in the lab experiment.
Lesson Question: What is the effect of on the volume of a gas?
A. pressure
B. the number of moles
C. temperature
D. molecular structure
E. The mass of the Gas
Hypothesis: If the pressure on a gas is increased, then its volume will ..
A. Decrease
B. increase
C. Stay the same
D. fluctuate randomly
because the gas molecules will ...
A. scatter at random
B. Break apart
C. change into solid form
D. be pushed closer together
E. be pushed farther apart
Answers
Answer:
The kinetic energy would decrease with increasePart A The first step to engineering is to define the problem. Write down the problem the students have to solve, and describe the challenges they will face when coming up with a solution.
WILL MARK BRAINLIEST!!
Answers
Answer:
Engineering is all about solving problems using math, science, and technical knowledge. And engineers have solved a lot of problems in the world by designing and building various technologies. We have everything from machines that can breathe for you in hospitals to suspension bridges to computers we use every day. All of these things were once designed by engineers using the engineering design process.
Explanation:
Answer:
Students will have to use their brains to solve problems and challenges they will face to find a solution to cleaning up oil spills. Students will face failures after completing their solution, lots of research, and problems during the making of their solutions. What will work? What won't?
Explanation:
Hope this helps!
A. Match the term with its definition. (1 point)
A. Frequency
B. Wavelength
C. Velocity
_____ The direction and speed at which a wave is traveling
_____ The distance between two adjacent wave peaks
_____ The number of waves passing a point in 1 second
B. What is the equation that illustrates the relationship between wave velocity, frequency, and wavelength? (1 point)
Answers
Taking into account the definition of wavelength, frecuency and propagation speed:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.The equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
WavelengthWavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).
FrequencyOn the other side, frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).
Propagation speed or velocityFinally, the propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement.
The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:
v = f×λ
All electromagnetic waves propagate in a vacuum at a constant speed of 2,998 x 10⁸ m / s, the speed of light.
Therefore, the previous expression establishes an inversely proportional relationship between the frequency and the wavelength: The higher the frequency, the lower the wavelength and when the frequency is lower, the greater the wavelength.
SummaryIn summary, the definition of frequency, wavelength and velocity are:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.Finally, the equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
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1. How can the rate of a chemical reaction be controlled?
Answers
Answer:
it can be controlled by balancing of the reaction
identify two ways recycling can reduce energy use?
Answers
Name these compounds according to IUPAC.
Answers
Functional groups are alcohol, carboxylic acids, ester, ketone, etc. The compounds are 2,2 dimethyl propane, 2-methyl butane, and ethanol.
What are functional groups?Functional groups provide specific chemical properties that are linked to the main chain of the compound and define the role of the compound. The first compound has two methyl (CH₃) groups at the second carbon and a total of three carbons making the compound, 2,2 dimethyl propane.
In the second compound, there is a methyl group on the second carbon and total of four carbons making it 2-methyl butane, and the third compound is two carbon with alcohol as the functional group making it ethanol.
Therefore, the compounds are 2,2 dimethyl propane, 2-methyl butane, and ethanol.
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Express your opinion for or against the theory of evolution
Answers
Explanation:
Critics of evolution commonly appeal to past scientific hoaxes such as the Piltdown Man forgery. It is argued that because scientists have been mistaken and deceived in the past about evidence for various aspects of evolution, the current evidence for evolution is likely to also be based on fraud and error.
Which has the most thermal energy?
1 points
200 ml of cold water
200 ml of hot water
100 ml of hot water
100 ml of cold water
Answers
Calculate the heat absorbed when 31.6 g of ice at 0°C is completely melted
Answers
Latent heat of fusion for ice is 33600J/k
Mass=31.6J/kHeat absorbed
k_f×m31.6×336001061,740mJ1061JI answered all of the previous questions, but I'm not sure I understand questions 4 and 5, so I'm hoping you can assist me.
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For 2. Look up what bonds the elements make when combined.
For 3. Look up the detention of the bond.
I hope this helps!
The diagram depicts the flow of
water through a dam. The flow
of water causes the turbine
blades to turn. This, in turn,
causes : generator to provide
energy to the power lines.
Which of the flowcharts best
outlines the conversion of
energy
A) chemical energy to kinetic
energy to electrical energy
B) Solar energy to mechanical
energy to electrical energy
C) kinetic energy to mechanical
energy to electrical energy
D) mechanical energy to
electrical energy to kinetic
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Mention five characteristics of an ideal fuel
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Answer:
Ideal fuel shows the following characteristics:
• It should be less expensive,
• It should be easily available,
• It should produce a large amount of heat,
• It can be transported easily.
• It has high calorific value.
• It should burns easily in air at a moderate rate.
the planet saturn rotates much more rapidly than earth. this would affect the length of saturn's...
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The planet Saturn rotates much more rapidly than earth, this would affect the length of Saturn's day and night.
How day and night occur?Day and night occur on any planet due to the rotation of the planet in its own axis with respect to the position of the sun.
As speed of planet Saturn is much more as compared to the speed of planet Earth. So occurring of day and night in the Saturn takes place faster as compared to earth.
Hence, length of day and night is get affected due to the fast movement.
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What is the molality of a solution in which 13.7 grams of nacl have been dissolved in 500 grams of water?
Answers
Answer: 0.5 M
Explanation:
molarity = (moles of solute)/(liters of solution)
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Draw a complete enthalpy diagram for the following reaction: 4Na(s) + O2(g) → 2Na2O(s). H=-178kJ
Answers
The enthalpy change of the given reaction is negative, so the reaction is an exothermic reaction.
What is enthalpy change of a reaction?Enthalpy change of a reaction is the energy changes that occur when reactant molecules form products.
Enthalpy is the heat content of a substance.
When enthalpy change is positive, the heat content of the product is greater than that of the reactant and the reaction is an endothermic reaction.
Whereas, when enthalpy change is negative, the heat content of the reactant is greater than that of the product and the reaction is an exothermic reaction.
Therefore, since the enthalpy change of the given reaction is negative, the reaction is an exothermic reaction.
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Question:
the initial pressure of a 4.0 l sample of helium gas is measured to be 12 atm.
if the pressure of the sample is reduced 3.0 atm, what is the resulting volume?
options:
a. 12l
b. 16l
c. 1.0 l
d. 9.0 l
Answers
Answer:
B
Explanation:
Recall the ideal gas law:
[tex]\displaystyle PV = nRT[/tex]
Because n, R, and T remain constant, we can rewrite the equation as:
[tex]\displaystyle k = P_1V_1 = P_2V_2[/tex]
Where k is some constant. This form of the ideal gas law is referred to as Boyle's Law.
Substitute and evaluate:
[tex]\displaystyle \begin{aligned} (4.0\text{ L})(12\text{ atm}) & = (3.0\text{ atm})V_2 \\ \\ V_2 & = 16\text{ L} \end{aligned}[/tex]
In conclusion, the answer is B .
What is the compound N₂O3 called?
Answers
Answer:
Explanation:
Dinitrogen trioxide is a nitrogen oxide. Nitrogen trioxide appears as a blue liquid with a sharp, unpleasant chemical odor.
Description: Dinitrogen trioxide is a nitrogen oxide.ChEBINitrogen trioxide appears as ...
Synonyms: Dinitrogen trioxideNITROGEN TRIOXIDENitrogen oxide (N2O3)10544-7...
Molecular Formula: N2O3
Molecular Weight: 76.012 g/mol
Answer:
It is called Dinitrogen trioxide. Hope this helps!
is there enough oxygen for complete combustion?
Answers
Answer:
Complete combustion occurs when there is enough oxygen to completely use up all the reactants. Incomplete combustion occurs when there is not enough oxygen resulting in the production of smoke, and less energy is produced when compared with complete combustion.
What happens when a saturated solution is further heated?
Answers
Answer:
If a saturated solution is heated to a higher temperature, it becomes unsaturated. Hence, the saturation point of a solution increases with the increase in temperature as there is an increase in solubility of the solute.
Explanation:
I hope this is able to help you! Please feel free to give feedback :)
why is the ring around saturn
Answers
Answer:
Saturn's rings are made up of ice, dust, rocks, moons and other satellite that orbit the gas giant as its equator, where gravity is strongest.
Explanation:
what is an unsaturated solution
Answers
Unsaturated solution: a solution in which more solute can be dissolved.
Explanation:
Salt dissolved in water or even sugar dissolved in water is an unsaturated solution if the quantity of dissolved salt/sugar is below the saturation point.
unsaturated solution: a solution in which more solute can be dissolved.
Explanation:
A solution in which the maximum amount of solvent has been dissolved. Any more solute added will sit as crystals on the bottom of the container.
Which describes interactions between substances and stomata during photosynthesis? Check all that apply.
Oxygen enters stomata.
Oxygen is released through stomata.
Carbon dioxide enters stomata.
Carbon dioxide is released through stomata.
Hydrogen enters stomata.
Hydrogen is released through stomata.
Answers
During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.
What is photosynthesis?Photosynthesis is defined as the process by which green plants use sunlight, water, and carbon dioxide to manufacture their own food in the form of sugar.
The stomata is a pore found on the leaves stem and roots which controls the movement of molecules in and out of the plant.
During photosynthesis, Oxygen is released through stomata and Carbon dioxide enters stomata.
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Answer:
The answer is B, and C
Explanation:
find out about the irish scientist, Robert Boyle and highlight his contributions to scientific concepts and ideas
Answers
Answer:
Known for his law of gases, Boyle was a 17th-century pioneer of modern chemistry. Every general-chemistry student learns of Robert Boyle (1627–1691) as the person who discovered that the volume of a gas decreases with increasing pressure and vice versa—the famous Boyle's law.
which device requires electrical energy to produce a chemical change
Answers
Electrolytic cell is the device which requires electrical energy to produce a chemical change.
What is an Electrolytic cell?This is referred to as electrochemical cell that requires an external source of electricity to effect a chemical change.
Without the source of the electricity, the chemical change won't have been produced at all.
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