Answer/Explanation:
62.559%
mass of an element X 100%
mass of the compound
Scientific Notation: 3.45 x 10^5
E Notation: 3.45e5
Answer:
His displacement is 0 km because he ends his walk where he started. The total distance of his walk is 20 km because he walks 10 km to the store + 10km back home.
Explanation:
Hope this helps:)
Answer: add 2 valence electrons
Explanation:
You have to make up for the negative electrons so you add them
