Answer:
B or D
Explanation:
.....I'm pretty sure I earned on some kids tv show
<span>A </span>chemical formula<span> is a way of expressing information about the proportions of </span>atoms<span> that constitute a particular</span>chemical compound<span>, using a single line of </span>chemical element<span> symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and </span>plus<span> (+) and </span>minus<span> (−) signs. A chemical formula is not a </span>chemical name showing how the atoms are arranged.
3 is C i believe, and as for 4 minerals are solid, natural.. that's about all I can say...
Reactants on the left and products on the right
