The volume occupies by 1.58g of a gas at s.t.p is 500cm3. What is the relative molecular mass of the gas?
(G.M.V at s.t.p = 22.40dm3)
- A. 28
- B. 32
- C. 44
- D. 71
Correct answer is D
Explanation
To find the relative molecular mass (M) of the gas, we can use the formula:
M = (mass of gas x G.M.V) / volume of gas
Given values:
- mass of gas = 1.58 g
- G.M.V (at S.T.P) = 22.40 dm³ = 22,400 cm³
- volume of gas = 500 cm³
Plugging in the values:
M = (1.58 g x 22,400 cm³) / 500 cm³
M = 35,763.2 / 500
M = 71.53 g/mol
So, the relative molecular mass of the gas is approximately 71 g/mol.
Jamb 1990 question 6
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