21: potassium has 20 neutrons
22: is d
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.
Rubidium is the alkali metal that would melt on a hot day.
Single replacement.
Mg replaces the H in HCl to become MgCl2.
Muscle – able to contract (shorten) to move body
