How many moles of NaOH are in a 50.0 g sample of NaOH?

What is an example of a physical property?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.