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Tatiana [17]
3 years ago
9

If you are given the number of molecules in an unidentified chemical compound, can you calculate the number of moles in this sam

ple?
yes, because you know that each mole contains 6.02 x 1023 molecules

yes, as long as you can also measure the mass of the sample

no, because the number of moles depends on the volume of the sample

no, because the number of moles depends on the identity of the substance
Chemistry
2 answers:
natta225 [31]3 years ago
6 0
3rd one i hope that helps

sasho [114]3 years ago
6 0

Answer:

The correct option is A

Explanation:

Avogadro's number (6.02 × 10²³) is used to calculate the actual number of ions/atoms/moles present in the molecules of a chemical compound. To do that, avogadro's number is multiplied by the number of molecules of the compound - this is because the number of atoms/ions/moles present in one mole of any substance/compound is 6.02 × 10²³. Hence, one can calculate the the number of moles in the sample because the avogadro's number and the number of molecules of the unknown sample is known.

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What source of thermal energy does an internal combustion engine use?
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Answer:

D

Explanation:

The source of the thermal energy in a combustion engine is the spark from the spark plug that ignites the fuel and air mixture converting chemical energy into thermal energy.

5 0
3 years ago
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If 0.138g of cyclohexene (c6h10) was obtained from 0.240g of cyclohexanol (c6h120), what is the percentage yield of cyclohexene?
tino4ka555 [31]
<span>Given in the question- 1 mole of cyclohexanol = > 1 mole of cyclohexene Molar mass 100.16 g/mol moles of cyclohexanol = .240 / 100.16= 0.002396 moles Molar mass 82.143 g/mol moles of cyclohexene formed @100 % yield = 0.002396 Molar mass 82.143 g/mol mass of cyclohexene @ 100 % = .002396 x 82.143 = 0.197g bur we have .138g so % yield = .138 / .197 = 70.0 % Ans- 70 percentage yield of cyclohexene.</span>
4 0
3 years ago
The energy released by nuclear fission can be used to ________ and turn a turbine to produce ________ energy.
enyata [817]
Heat water; mechanical (the movement of a turbine is based off of mechanical energy, not chemical or potential).
6 0
3 years ago
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MARK BRAINLIEST AND 14 POINTS
LekaFEV [45]

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Explanation:

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3 years ago
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Choose the statement below that is TRUE. A weak acid solution consists of mostly insoluble acid molecules. The term 'strong elec
lora16 [44]

Answer: Option (A) is the correct answer.

Explanation:

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A solution in which solute particles completely dissociate into ions in a solvent is known as a strong electrolyte.

Whereas a solution in which solute particles partially dissociate into ions is known as a weak electrolyte.

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Therefore, we can conclude that the true statement is weak acid solution consists of mostly insoluble acid molecules.

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3 years ago
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