Question

Sample X has a mass of 22.7 g and reacts with sample Y to form sample XY with a total mass of 86.9 g. What is the mass of sample Y?

Answer 1

The mass of sample Y can be calculated by subtracting the mass of sample X from the total mass of sample XY.

Step-by-step explanation:

The mass of sample Y can be calculated by subtracting the mass of sample X from the total mass of sample XY. In this case, the mass of sample X is 22.7 g and the total mass of sample XY is 86.9 g. Therefore, the mass of sample Y can be calculated as follows:

Mass of sample Y = Total mass of XY - Mass of sample X

Mass of sample Y = 86.9 g - 22.7 g

Mass of sample Y = 64.2 g

Answer 2

`\large \boxed{\text{64.2 g}}`

Step-by-step explanation:

X + Y ⟶ XY

mass: 22.7 g x 86.9 g

According to the Law of Conservation of Mass, the mass of the product must equal the mass of the reactants.

`\begin{array}{rcl}\text{22.7 g} + x & = & \text{86.9 g}\\x & = & \text{86.9 g} - \text{22.7 g}\\& = & \textbf{64.2 g}\\\end{array}\\\text{The mass of Y is $\large \boxed{\textbf{64.2 g}}$}`