The heat content of a system is?

What is the molality of a solution containing 10.0 g of Na2SO4 dissolved in 1000.0 g of water?

If 0.7 moles of potassium chloride are dissolved in 0.5 L of water, what is the concentration of the solution? 1.4 M 0.7 M 0.5 M 0.35 M

If a gas occupies a volume of 0.25 L at - 2.3°C, by what amount would the volume increase if the gas were heated to 82°C at constant pressure? Could somebody include the whole process? I'm really confused

A pound is approximately 0.45 kilogram. A person weighs 87 kilograms. What is the person's weight, in pounds, when expressed to the correct number of significant figures? A. 190 lb B. 180 lb C. 52 lb D. 39 lb

What is the specific heat of mercury if it requires 167 J to change the temperature of 15.0 g of mercury from 25.0°C to 33.0°C?

The density of a metal is 9.80 g/mL. What is the mass of a sample of metal when dropped in 28.9 mL of water, the volume increases to 56.4 mL?

Does sound travel best through solids, liquids, or gases?

Which term refers to the number of molecules or atoms that participate as reactants in an elementary step in a chemical reaction? molecularity particulates reactants submolecular

Due to food scarcity in ancient times people had to spend

A group of the same species makes up a?