Two hundred grams of a substance requires 9.76kj of heat to raise its temperature from 25 c to 45 c. it has a specific heat of 2.44j/g. use the table to identify the substance.
a ethanol
b gasoline
c ice
d air
i think it's gasoline!

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

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Find the mass, in grams, of 5.00*10^23 molecules of f2