The molar heat of vaporization for liquid water is 40.6 kJ/mole. How much energy is required to change 7.0 g of liquid water to steam if the water is already at 100°C?

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

What is the percentage of hydrogen in c2h4