In VA, 30% of the electricity generated uses coal. On average, each person in VA uses 1,870 kg of coal per year to generate electricity that they use.
Use stoichiometry to calculate the amount of kilograms of carbon dioxide
produced from 1,870 kg coal. (Must show stoichiometric equation to earn
credit. Hint: 1000 grams = 1 kg)

it's c. elements are placed in rows based on how may valencies electrons have.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.