If 6.5 g of propane gas (C3H8) are combusted every second at STP, what is this rate of reaction in litres of carbon dioxide gas produced per minute

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.