How much heat energy (in megajoules) is to convert 7 kilograms of ice at -9 degrees celcius to water at 0 degrees c

What provides structure to the human body?

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?