Question

In a chemical reaction, two molecules are rearranged to produce two new molecules. Reactant 1 has a mass of 12 g. Reactant 2 has a mass of 23 g. The mass of product 1 is 15 g. The mass of product 2 is _____.(1 point)
Responses

11 g
11 g

20 g
20 g

27 g
27 g

35 g

Answer 1

In a chemical reaction, the law of conservation of mass states that the mass of the reactants must equal the mass of the products.

You have the following data:

- Mass of Reactant 1 = 12 g
- Mass of Reactant 2 = 23 g
- Mass of Product 1 = 15 g
- Mass of Product 2 = ?

First, calculate the total mass of the reactants:

\[
\text{Total mass of reactants} = \text{Mass of Reactant 1} + \text{Mass of Reactant 2} = 12 \, \text{g} + 23 \, \text{g} = 35 \, \text{g}
\]

According to the law of conservation of mass:

\[
\text{Total mass of products} = \text{Total mass of reactants}
\]

Thus,

\[
\text{Mass of Product 1} + \text{Mass of Product 2} = 35 \, \text{g}
\]

We already know the mass of Product 1 is 15 g:

\[
15 \, \text{g} + \text{Mass of Product 2} = 35 \, \text{g}
\]

Now, solve for the mass of Product 2:

\[
\text{Mass of Product 2} = 35 \, \text{g} - 15 \, \text{g} = 20 \, \text{g}
\]

Therefore, the mass of Product 2 is **20 g**.