Which is a fossil fuel?
O A. Coal
O B. Biomass
O C. Geothermal
O D. Nuclear

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

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

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-