3.x Conservation Of Mass (GCSE Chemistry)

Lithium (7g) reacts with water (18g). How much lithium hydroxide and hydrogen gas are produced in total?

If hydrogen (4g) reacts with oxygen (32g), how much water is produced?

When a substance burns in 23g of oxygen, producing an oxide, how many grams of product result if the substance weighed 50g before burning?

If 5g of hydrogen reacts completely with 40g of chlorine, what mass of hydrogen chloride is formed?

In a reaction 20g of reactants produce 20g of products. This demonstrates:

Iron combines completely with 32g of sulfur forming iron sulfide. If 56g of iron are used, what is the total mass of iron sulfide formed?

If 3g of hydrogen completely reacts with 24g of oxygen, what is the mass of water formed?

What principle states that the total mass before a reaction equals the total mass afterward?

If 2.8g of iron reacts completely with 1.6g of sulfur, how much iron sulfide is produced?

Lead nitrate decomposes completely into lead oxide, nitrogen dioxide and oxygen. If the mass of lead nitrate is 33.1g, what will be the combined mass of the products?

If calcium carbonate weighing 100g decomposes to produce calcium oxide and carbon dioxide, what is the combined mass of the two products?