Use this equation to answer the following questions: 1 Ca (s) + 2 HF (aq) → 1 CaF2 (s) +1 H2 (g)

Ifound this on google “laws of chemical combination. it states that matter can neither be created nor destroyed. it stated that a given compound always contains exactly the same proportion of elements by weight.” i hope this you for what your looking for.

Here is the link to the all information u need i mean answer key