A 4.00 g impure sample of is heated until all of the produced has a mass of 0.88 g

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A 4.00 g impure sample of

\text{NaHCO}_3

is heated until all of the

\text{CO}_2

produced has a mass of 0.88 g.

2\,\text{NaHCO}_3(\text{s})\rightarrow \text{Na}_2\text{CO}_3(\text{s})+\text{CO}_2(\text{g})+\text{H}_2\text{O}(\text{g})

What is the percent purity of the

\text{NaHCO}_3

in the original sample? (a)

84\%

(b)

42\%

(c)

68\%

(d)

53\%