Ca + Cl2 ->CaCl2 <span>synthesis (check your chemistry lesson)</span>
Answer:They indicate the number of molecules of each substance
Explanation:
When we write chemical reaction equations, we usually put a number before the symbol of each reactant.
These coefficient shows the number of molecules of that specie that is involved in the balanced reaction equation for the reaction.
These coefficients are important because they are used in carrying out stoichiometric calculations.
Mark Brainliest please
Answer :
In my opinion , answer is A
A, as carbon is an atomic substance - element
Answer: 22920 years
Explanation:
Every 5730, the carbon-14 is halved.
After 4 of such cycles, meaning 5730 * 4 = 22920 years