Answer:
21
Explanation:
Formula;
Mass number = number of protons + number of neutrons
= 9 + 12
= 21
Answer:
Option B
Explanation:
Remember that the products are on the right side of a chemical equation while the reactant is on the left.
In this case we have...
C2H6 + O2 ⇒ CO2 + H2O
Since C2H6 and O2 are on the left side that would mean they're the reactants, while CO2 + H2O are the products. Which means your answer is option B or "C2H6 + O2 are the reactants, CO2 + H2O are the products."
Hope this helps.
I dont know sorry i wish i could help you
Answer:
Magnesium is the most reactive element. it is higher than the other elements (Fe, Pb, Zn) in the electrochemical series
Answer: Most of the volume of a gas is composed of the large amounts of empty space between the gas particles.
Explanation:
