Which of the following represents 1 mol of phosphine gas, PH3? A) 6.02 x 1023 phosphine molecules B) 34.00 g phosphine gas C) 22.4 L phosphine gas at STP D) all of the above E) none of the above

Question

Chemistry

Tessa Flynn

15 June, 15:56

Which of the following represents 1 mol of phosphine gas, PH3? A) 6.02 x 1023 phosphine molecules B) 34.00 g phosphine gas C) 22.4 L phosphine gas at STP D) all of the above E) none of the above

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Answers (1)

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Donte Reeves · Answer 1

D) all of the above

Explanation:

Which of the following represents 1 mol of phosphine gas, PH₃?

A) 6.02 x 10²³ phosphine molecules. YES. Considering Avogadro's number, 1 mole of a substance contains 6.02 x 10²³ molecules of such substance.

B) 34.00 g phosphine gas. YES. The molar mass of phosphine is equal to the sum of the molar masses of the elements that form it.

MM (PH₃) = MM (P) + 3 * MM (H) = 31.00 g/mol + 3 * 1.00 g/mol = 34.00 g/mol.

C) 22.4 L phosphine gas at STP. YES. At standard temperature (0 °C) and pressure (1 atm), 1 mole of any gas occupies a volume of 22.4 L.