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Related Topic: The Mole: Formulae and Chemical Equations

Related Subtopic: Empirical and Molecular formula

Questions 2.4(b)

1. A compound X, consists of 3.5 g of nitrogen and 8 g of oxygen as the only components. Determine the empirical formula of X (N = 14; O = 16).
2. If the molar mass of X (in question 1) is 92 g, find its molecular formula.
3. In a compound, 4 g of hydrogen is found to be combined with 32 g of oxygen. Determine the empirical formula of the compound (H = 1; O = 16).
4. The empirical formula of a compound is ZQ₂. The masses of Z and Q in a sample of the compound are 2.5 g and 17.75 g respectively. Determine the molar mass of (a) Z and (b) ZQ₂
   (Q = 35.5).

Answers to Questions 2.4(b)

Plate 2.4b Answers to Questions 2.4(b)