anyone down to write me a one page essay on why different safety rules and safety equipment are needed to use in science class​

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.