Please help The thermochemical equation for the combustion of propane gas is:

CH4 (g) + 2O2 (g)  CO2 (g) + 2H2O (I), ΔH = -890 kJ/mol

Calculate much heat is released when 3.5 moles of propane have a combustion reaction.

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

How many atoms are there in 5.70 mol of mg

What will most likely happen when two bromine atoms bond together?