Answer:
The real answer for a is-He(helium)4,002602
The answer for b is-Mg(Magnesium) 24.305
All colors but red is being absorbed by the material.
20 calories equals to 8.368 joules.
4.184 J is needed to raise 1 gram of water.(Heat capacity of water)
for 2 grams of water 8.368 joules.
So the answer is 16 c.
¿What? For you bye, i love you, no sabo ingles.
The starting substances in a chemical reaction are called reactants - they are written on the left side of a chemical equation.