Question

15.6 grams of lead(II) nitrate is in a test tube. A 4.8-g sample of potassium iodide is an Erlenmeyer flask. The substance in the test tube is poured into the Erlenmeyer flask so that the two substances react. The mass of the Erlenmeyer flask 115.6 grams. What is the mass of the combined products & Erlenmeyer flask?

Answer 1

Mass of combined products = 20.4 grams

Mass of combined product and Erlenmeyer flask = 136 grams

Step-by-step explanation:

By law of mass conservation, mass cannot be destroyed or created. So mass before reaction is mass after reaction.

Mass of lead(II) nitrate = 15.6 grams

Mass of potassium iodide = 4.8 grams

Mass of the Erlenmeyer flask = 115.6 grams

Mass of reactants = 15.6 + 4.8 = 20.4 grams

So mass of products = 20.4 grams

Mass of combined product and Erlenmeyer flask = 115.6 + 20.4 = 136 grams