What happens when two or more chemical, react with eachother

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2

Five different substances are given to you to be dissolved in water. which substances are most likely to undergo dissolution in water? check all that apply. view available hint(s) check all that apply. sodium fluoride, naf octane, c8h18 propanol, ch3ch2ch2oh potassium iodide, ki benzene, c6h6

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?