First slide

Gaseous state

Question

What weight of hydrogen at STP could be contained in a vessel that holds 4.8 g oxygen at STP?

Moderate

A

4.8 g
B

3.0 g
C

0.6 g
D

0.3 g

Solution

$Moles of O_{2} = Moles of H_{2} 4 .8 {gO}_{2} = \frac{4 .8}{32} = 0 .15 mol O_{2} = 0 .15 {molH}_{2} = 0 .30 g H_{2}$

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