When 127g of cooper reacts with 32g of oxygen gas to form copper oxide, no copper or oxygen is left over. How much copper oxide is in the product? * 2 points
32g
95g
127g
159g
6. In a chemical reaction, atoms are *
2 points
moved
rearranged
borrowed
categorized
7. Pure substances include *
2 points
compounds and mixtures
homogeneous and heterogenous
compounds and elements
elements and mixtures
8. The picture below is an example of *
2 points
Captionless Image
element
compound
mixture of elements
mixture of compounds
mixture of elements and compoinds
9. The picture below is an example of *
2 points
Captionless Image
element
compound
mixture of elements
mixture of compounds
mixture of elements and compounds
10. Compounds can be separated only by a *
2 points
physical reaction
chemical reaction
synthesis reaction
decomposition reaction
11. The law of conservation of mass was first demonstrated by the French chemist *
2 points
Niels Bohr
Antoine Lavoisier
Marie Curie