How much energy is released when 50.00 mol of glycerin melts? (Heat of fusion glycerin-91.7 KJ/mol)

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted