Answer:
3
Explanation:
If oxygen reacts with iron, then both must be reactants and rust the product of that reaction
False, a gas that produces a pop is hydrogen
Hope this helped :)
Answer:

Explanation:
We already know that the mass number of an atom is the sum of the number of protons and the number of neutrons.
So, the mass number of this isotope is;
Number of protons = 7
Number of neutrons = 8
Mass number = 7 + 8 = 15
Hence, the isotope is;

Answer:
B
Explanation:
Planting trees sequesters CO2
all of the other choices produce more CO2 in the atmosphere