The main engines of the Space Shuttle burn hydrogen to produce water. How much heat (in kJ) is associated with this process if 1.32 x 105 kg of liquid H2 is burned? 2 H2 (l ) + O2 (l ) → 2 H2O (l ) ΔHºrxn = – 571.6 kJ

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium