Question

Which of the following reactions is not correct according to the law of conservation of mass?

• A. $2Mg_{(s)} + O_{2(g)} \rightarrow 2MgO_{(s)}$

• B. $C_{3}H_{8(g)} + O_{2(g)} \rightarrow CO_{2(g)} + H_{2}O_{(g)}$

• C. $P_{4(s)} + 5O_{2(g)} \rightarrow P_{4}O_{10(s)}$
• D. $CH_{4(g)} + 2O_{2(g)} \rightarrow CO_{2(g)} + 2H_{2}O_{(g)}$

Answer 1

Answer: (B)

$C_{3}H_{8(g)} + O_{2(g)} \rightarrow CO_{2(g)} + H_{2}O_{(g)}$

Answer 2

(2) : The reaction

$C_{3}H_{8(g)} + O_{2(g)} \rightarrow CO_{2(g)} + H_{2}O_{(g)}$ is not a balanced equation hence, is not correct according to the law of conservation of mass.