ChemThink Answers

ChemThink Answers:
1) Reactants
2) Products
3)Chemical Change
4) Rearrangement
5) Breaking bonds, form bonds
6) same atoms
7) missing atoms or new atom
8) rearrange the bonds in the atoms
9) 2, 2, 1, 1

10)
4 | H | 4
2 | O | 2

11) Law of Conservation of Mass
12) Number of Reactants and the same number of products
13) 2 Cu 1O2 = 2CuO

14)
1 [Cu] 1
2 [O] 1


15) CuO, O
16) reactants, CuO
17) 2 Cu + O2 = 2CuO

18) 
1 [C] 1
4 [H] 4
4 [O] 4


19)
2 [N] 2
6 [H] 6

20)
2 [K] 2
2 [Cl] 2
6 [O] 6





21)

4 [Al] 4
6 [O] 6

1) making bonds, breaking bonds or both
2) must be present before and after the reaction
3) coefficients, atom