35cm 3 of hydrogen sparked with 12cm 3 of oxygen, at 110° and 760mmHg to
CHEMISTRY
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35cm3 of hydrogen sparked with 12cm3 of oxygen, at 110° and 760mmHg to produce steam. What percentage of the total volume of gas left after the reaction is hydrogen?
- A) 11%
- B) 31%
- C) 35%
- D) 69%
Correct Answer: D) 69%
Explanation
To answer this question, we need to first understand the balanced chemical equation for the reaction between hydrogen and oxygen to form water:
\(2H_2 + O_2 \rightarrow 2H_2O\)
From this equation, we can see that 2 moles of hydrogen react with 1 mole of oxygen to produce 2 moles of water. Now, let's convert the given volumes to moles using the molar volume of a gas at STP (Standard Temperature and Pressure), which is 22.4 dm\(^3\)/mol. However, the reaction is at 110
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