Please help, I'm being timed! this was the question!
2 Al + 6 HBr --> 3 H2 + 2 AlBr3

If 16.5g of aluminum reacts with 21.2g of HBr, how many grams of aluminum bromide will be produced? what is the excess and limiting factors?

did anyone actually do this? like if anyone has submitted this i rly need .

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.