Answer: (1)CaSO4 -> (2)O2 + (1)CaS
Explanation: edge 2020 chem
A should be the answer because the more you test an experiment the more data you have to rely on changing the experiment would cause you to have different outcomes making the results different and unreliable so B, C, and D is not going to be the answer Hope this helps
A heterogeneous mixture is a mixture that it's components can be easily seen and separated.
c. a jar of mixed nuts
Answer:
0.0000159
Explanation:
Divide 15.9 by 1000000, because 1 kilometer equals 1000000 millimeters.
