I did an experiment on determining the solubility product of calcium hydroxide and one of the questions says to find the percentage error which I found to be 353%. Could this answer be correct?

Why is the melting of ice a physical change ?

What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent? a. combustion b. decomposition c. single replacement d. synthesis

A1.50-liter sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°c. without changing the temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.00 atmospheres. the volume of the gas is