Which of the following statements best explains the law of conservation of mass?

Question

Which of the following statements best explains the law of conservation of mass? (A) 100 g of water is heated to give steam (B) A sample of N2 gas is heated at constant pressure without any change in mass (C) 36 g of carbon combines with 32 g of oxygen to form 68 g of CO2 (D) 10 g of carbon is heated in vacuum without any change in mass

Tardigrade Admin · Accepted Answer

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Among the given option only option C involves a chemical change/reaction as:

2 C + O \to 2 CO

and

m_{reactants} = m_{products}

36 + 32 = 68 g

Q. Which of the following statements best explains the law of conservation of mass?

$100 g$ of water is heated to give steam

A sample of $N_{2}$ gas is heated at constant pressure without any change in mass

$36 g$ of carbon combines with $32 g$ of oxygen to form $68 g$ of $C O_{2}$

$10 g$ of carbon is heated in vacuum without any change in mass

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Among the given option only option C involves a chemical change/reaction as:
$2 C + O \to 2 CO$
and $m_{reactants} = m_{products}$
$36 + 32 = 68 g$

Q. Which of the following statements best explains the law of conservation of mass?

100g of water is heated to give steam

A sample of N2​ gas is heated at constant pressure without any change in mass

36g of carbon combines with 32g of oxygen to form 68g of CO2​

10g of carbon is heated in vacuum without any change in mass

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. Among the given option only option C involves a chemical change/reaction as: 2C+O​→2CO​ and mreactants​=mproducts​ 36+32=68g

$100 g$ of water is heated to give steam

A sample of $N_{2}$ gas is heated at constant pressure without any change in mass

$36 g$ of carbon combines with $32 g$ of oxygen to form $68 g$ of $C O_{2}$

$10 g$ of carbon is heated in vacuum without any change in mass

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Among the given option only option C involves a chemical change/reaction as:
$2 C + O \to 2 CO$
and $m_{reactants} = m_{products}$
$36 + 32 = 68 g$