Use the periodic table to answer this question. sodium reacts with chlorine gas to form sodium chloride. 2na + cl2 → 2nacl what mass of chlorine gas will react with 92.0 g of sodium? 246 g cl2 298 g cl2 142 g cl2 63 g cl2

Answer is: mass of chlorine gas is 142 grams.
Chemical reaction: 2Na + Cl₂ → 2NaCl.
m(Na) = 92,0 g.
n(Na) = m(Na) ÷ M(Na).
n(Na) = 92 g ÷ 23 g/mol.
n(Na) = 4 mol.
From chemical reaction: n(Na) : n(Cl₂) = 2 : 1.
n(Cl₂) = 4 mol ÷ 2.
n(Cl₂) = 2 mol.
m(Cl₂) = 2 mol · 71 g/mol.
m(Cl₂) = 142 g.

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