Part C Place the copper strips in test tubes 3 and 6. If the strips are too wide, you may bend them to fit them in the test tubes.
Place the magnesium strips in test tubes 1 and 4. If necessary, use the stirring rod to push the strips down until they're
entirely submerged.
Place the zinc strips in test tubes 2 and 5.
Record your observations of the appearance of the substances in the test tubes immediately after adding the metal
strips. Include any evidence of a chemical reaction. If there's no evidence of a reaction, write "no reaction."

a corroding iron, if that's one of your choices

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o