What happens to the density of the air in the balloon as it is heated?

An observation that requires measurement is called quantitative observable or qualitative

Given the following reaction: c3h8+5o2=3co2+4h20 how many grams of co2 will be produced 7 g of c3h8 and 98 g of o2

What is bromine+calcium iodide--> calcium bromide +iodine balanced