Question

Nitrogen and hydrogen combine in the ratio of 14 : 3 by mass to form ammonia. The mass of nitrogen required to react completely with 9 g of hydrogen is

• A.
  4.67 g
• B.
  36.5 g
• C.
  42.0 g
• D.
  45.0 g

Answer 1

The correct option is C

42.0 g
Nitrogen and hydrogen combine in the ratio of 14 : 3 by mass to form ammonia. This means that 14 g of nitrogen is required to react with 3 g of hydrogen.

$\therefore$ Mass of nitrogen required to react with 9 g of hydrogen $=\frac{14}{3}\times 9=42g$

Hence, the correct answer is option (c).