Which of the following statements is true of 19.0 g of F₂(g) at STP? A) It contains 6.02 * 10²³ molecules. B) It contains the same number of molecules as mol of O₂(g) at STP. C) It occupies a volume of 22.4 L. D) It exists only in the form of ions. E) none of the above

Question

Quizplus · Accepted Answer

According to Avogadro's law, equal volumes of gases at the same temperature and pressure contain the same number of molecules. Therefore, 11 mol of O₂(g) at STP contains the same number of molecules as 19.0 g of F₂(g) at STP. The other options are incorrect: A is incorrect because it assumes a specific number of molecules for a given mass, which is dependent on the molar mass and the Avogadro constant, not a given value; C is incorrect because 19.0 g of a gas at STP occupies a volume of 22.4 L only if it is a gas with a molar mass of 22.4 g/mol, which is not the case for F₂(g); D is incorrect because F₂(g) is a molecular compound, not an ionic compound.

Which of the Following Statements Is True of 19