Question

calculate the numbers of moles in 18g of C2H2​

Answer 1

Answer:

0.69 moles

Explanation:

Molar mass of C2H2= 12×2+1×2 = 26gmol^-1

So, 26g C2H2 = 1mole C2H2

Therefore, 18g C2H2 = (1/26)×18 = 0.69 moles (Ans)

Answer 2

Answer:

The numbers of moles of C2H2 in 18g of C2H2 are 0.69 moles.

Explanation:

As, C2H2 = Ethyne

Data:-

Mass in grams of Ethyne = 18 grams.

Molecular Mass of Ethyne = (12×2)+(1×2).

Molecular Mass of Ethyne = 26 grams/mole.

Number of moles of Ethyne = n = ?

Solution:-

$number \: of \: moles \: of \: ethyne = \frac{mass \: in \: grams \: of \: ethyne}{molecular \: mass \: of \: ethyne} .$

$n = \frac{18g}{26g {mol}^{ - 1} } .$

$n = 0.69moles.$

Therefore,

Number of moles of Ethyne = n = 0.69 moles.

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