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The mass of 800cm3 of a gas X at s.t.p. is 1.0g. What is the...

Chemistry
WAEC 2004
The mass of 800cm3 of a gas X at s.t.p. is 1.0g. What is the molar mass of X? [1 mole of a gas at s.t.p occupies 22.4dm 3]
  • A. 18.0g mol-1
  • B. 22.4g mol-1
  • C. 28.0gmol-1
  • D. 36.0gmol-1
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Correct Answer: Option C
Explanation
The mass of 0.8dm3 of a gas at s.t.p. is 1.0g :. 22.4dm> of gas at s.t.p. will have a molar mass of 22.4/0.8 = 28.0g mol-1
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