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2 years ago

Convert 26.02 x 1023 molecules of C2H8 to grams. Round your answer to the hundredths place.

Chemistry

1 answer:

aliina [53]2 years ago

4 0

Answer:

x= 138.24 g

Explanation:

We use the avogradro's number

6.023 x 10^23 molecules -> 1 mol C2H8

26.02 x 10^23 molecules -> x

x= (26.02 x 10^23 molecules * 1 mol C2H8 )/6.023 x 10^23 molecules

x= 4.32 mol C2H8

1 mol C2H8 -> 32 g

4.32 mol C2H8 -> x

x= (4.32 mol C2H8 * 32 g)/ 1 mol C2H8

x= 138.24 g

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1 year ago

Item 5 A solution of methanol, CH3OH, in water is prepared by mixing together 128 g of methanol and 108 g of water. The mole fra

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Answer:

Mole fraction of methanol will be closest to 4.

Explanation:

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The formula for the calculation of moles is shown below:

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Thus,

$Moles= \frac{108\ g}{18.0153\ g/mol}$

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So, according to definition of mole fraction:

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1 year ago

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Evgesh-ka [11]

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2 years ago

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2 years ago

What is the mass of a sample of NH3 containing 6.3 × 1024 molecules of NH3?

quester [9]

Answer:

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Explanation:

It is known that 1.0 mole of a compound contains Avogadro's number of molecules (6.022 x 10²³).

Using cross multiplication:

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1 year ago