When Mr$.$ Paul marks a question, he looks at the final answer first. If it is incorrect, he must then work backwards to determine where the student went wrong. Below is a student's solution to the given question. Note that the errors must be independent of each other. The solution contains two errors.

a$.$ Identify the two errors.

b$.$ Explain why they are incorrect.

c$.$ Determine the correct answer.

Question

$10\mathrm{.}0$ g of sodium nitrate reacts with excess potassium. What mass of sodium is produced? When Mr$.$ Paul marks a question, he looks at the final answer first. If it is

incorrect, he must then work backwards to determine where the student

went wrong. Below is a student's solution to the given question. Note that

the errors must be independent of each other. The solution contains two

errors.

a$.$ Identify the two errors.

b$.$ Explain why they are incorrect.

c$.$ Determine the correct answer.

Question

$10\mathrm{.}0g$ of sodium nitrate reacts with excess potassium. What mass of

sodium is produced?

Student's Solution