Distillation and Percentage purity

What is the one that is labeled as number 6?

A laboratory prepares 45.0 g of a sample containing 36.0 g of oxygen. What is the percentage purity of oxygen?

A block of cement weighs 300.0 g, and it contains 270.0 g of limestone. What is the percentage purity of limestone in the block?

An alloy weighs 120.0 g and contains 96.0 g of copper. What is the percentage purity of copper in the alloy?

David mixes 100.0 g of fertilizer, which contains 90.0 g of nitrogen. What is the percentage purity of nitrogen in the fertilizer?

A chemical mixture is 200.0 g in total, with 150.0 g of calcium. What is the percentage purity of calcium in the mixture?

What is the name of apparatus number 6?

A solution weighs 150.0 g, and 120.0 g of it is alcohol. What is the percentage purity of alcohol in the solution?

A batch of medicine weighs 75.0 g and contains 68.0 g of the active ingredient. What is the percentage purity of the active ingredient?

Maria makes 35.0 g of soap, which contains 28.0 g of fat. What is the percentage purity of fat in the soap?

A company produces 500.0 g of a sugar solution, containing 450.0 g of pure sugar. What is the percentage purity of sugar in the solution?

What is the name of apparatus number 4?

A sample of 60.0 g of sand contains 54.0 g of quartz. What is the percentage purity of quartz in the sand?

Sarah prepares 30.0 g of a liquid solution. It contains 24.0 g of water. What is the percentage purity of water in the solution?

What is the name of solution in number 10?

A piece of metal weighs 250.0 g, and 225.0 g of it is pure silver. What is the percentage purity of silver in the metal?

Jack produces 50.0 g of a mixture. The mixture contains 42.5 g of salt. What is the percentage purity of salt in the mixture?

A sample weighing 80.0 g is analyzed and found to contain 72.0 g of iron. What is the percentage purity of iron in the sample?

A scientist makes 25.0 g of a compound, which contains 19.0 g of carbon. What is the percentage purity of carbon in the compound?

What is the name of apparatus number 1?