HELLLLLLLLLLLLP ME PLS 10 points pls
What do the symbols in parenthesis indicate?
CaCl2(aq) + 2AgNO3(aq)) → Ca(NO3)2(aq) + 2AgCl(s)
1 the catalyst used in the reaction
2 the number of atoms of each reactant and product
3 the physical state of each reactant and product
4 the number of units of each reactant and product