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Question: A 30.6 g sample of gas coverage 22,414 L at STP. What is the molecular weight of this gas?

Here is our question:

A 30.6 g sample of gas occupies 22.414 L at STP. What is the molecular weight of this gas?

Answer

We have:

Molar mass =g/mol

molar volume of gas at STP: 1mol = 22.414L

Molar mass and molecular weight are numerically the same. Units differ (9.mol vs amu)

So, here is our answer

Relevant knowledge

The mass of a molecular molecule is called its relative molecular mass, or molecular weight. It is the sum of all the relative atomic masses for each constituent element divided by the number of elements in the molecular formula.

The atomic mass of each nucleus in a molecule is used to calculate molecular mass, while the molar mass of an element is taken from its standard atomic weight. Standard atomic weights are calculated using the element’s isotope distribution in the sample. This is usually considered “normal”.

Conclusion

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