Chapter 3, Problem 87QAP

Determine whether the statements given below are true or false.

(a) The mass of an atom can have the unit mole.

(b) In N204, the mass of the oxygen is twice that of the nitrogen.

(c) One mole of chlorine atoms has a mass of 35.45 g.

(d) Boron has an average atomic mass of 10.81 amu. It has two isotopes, B-10 (10.01 amu) and B-11

(11.01 amu). There is more naturally occurring B-10 than B-11.

(e) The compound C₆H₁₂O₂N has for its simplest formula C₃H₆ON_1/2.

(f) A 558.5-g sample of iron contains ten times as many atoms as 0.5200 g of chromium.

(g) If 1.00 mol of ammonia is mixed with 1.00 mol of oxygen the following reaction occurs,

${\text{4NH}}_{\text{3}}\left(g\right)+{\text{5O}}_{\text{2}}\left(g\right)\to \text{4NO}\left(g\right)+{\text{6H}}_{\text{2}}\text{O}\left(l\right)$All the oxygen is consumed.

(h) When balancing an equation, the total number of moles of reactant molecules must equal the total number of moles of product molecules.