Question

according to the law of conservation of mass, how much zinc was present in the zinc carbonate? (1 point) 256 g 88.0 g 40.0 g 104 g

Explanation:

Step1: Apply the law of conservation of mass

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. So, the mass of reactants equals the mass of products.
Mass of reactants: \(64\space g+ 192\space g\)
Mass of products: \(152\space g + x\space g\) (where \(x\) is the mass of \(Zn\))
Set up the equation: \(64 + 192=152+x\)

Step2: Solve the equation for \(x\)

First, calculate the left - hand side of the equation: \(64 + 192=256\)
The equation becomes \(256 = 152+x\)
Subtract \(152\) from both sides: \(x=256 - 152\)
\(x = 104\)

Answer:

\(104\space g\)