What is the volume, in liters, of 3.75 moles of O2 gas at STP?
2 answers:
Answer : The volume of oxygen gas is 84.0 liters.
Explanation : Given,
Moles of oxygen gas = 3.75 moles
Now we have to determine the volume of oxygen gas at STP.
As we know that at STP, 1 mole of substance occupies 22. 4 L volume of gas.
As, 1 mole of gas occupies 22.4 L volume of
gas
So, 3.75 moles of gas occupies
volume of
gas
Therefore, the volume of oxygen gas is 84.0 liters.
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Answer: The mole ratio of Zn to ZnO is 3: 3.
Explanation:
According to law of conservation of mass, mass can be neither be created nor be destroyed. The mass on reactant side must be equal to the mass on product side. Thus the atoms of each element on both side of the reaction must be same.
The balanced chemical reaction is:
Here 3 moles of Zn combine with 2 moles of to give 1 mole of
and 3 moles of
. Thus the mole ratio of Zn to ZnO is 3: 3.