Questions 13 and 14 look at the pic
1 answer:
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Answer:
The volume of 4.92 grams of hydrogen gas at STP is 9.105 litter.
Explanation:
We know that, the molecular weight of hydrogen gas =
.
Moles of hydrogen gas = moles.
At STP, 1 mole of hydrogen gas = occupies 22.4 litter
So, 2.46 mole of hydrogen gas = occupies litter.
Hence, the volume of 2.46 grams of hydrogen gas at STP is 9.105 litter.
Answer:
Explanation:
The graduated cylinder contains of water
mL is a volume unit.
Water volume = 41.7 mL
The lead ball caused an increase of volume from 41.7 mL to 96.0 mL
The new volume is the lead ball volume plus the original water volume :
Final volume = Vlead ball+ Water original volume
This is actually true if we suppose that the lead ball is fully sunken in the water.
We always must consider that the volume difference is the volume that the sunken object is occupying in the water.