Ca(OH)2 + Na2CO3 --> CaCO3 + NaOH

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

The vapor pressure of water at 25.0°c is 23.8 torr. determine the mass of glucose (molar mass = 180 g/mol) needed to add to 500.0 g of water to change the vapor pressure to 22.8 torr.

Aresearcher finds that white bread contains more preservatives and has a higher moisture content than wheat bread. she designs a test to sermons whether the type of bread, white or wheat, affects the amount of mold growth. what must be done for the researcher to accurately measure the dependent variable?