Every 2 million years the amount is halved
0 million = 200g
2 million = 200g/2 = 100g
4 million = 100g/2 = 50g
(0.48 gram) x (1mole / 4.0 gram) = 0.48/4.0 = 0.12 mole
Hello!
The electron configuration for helium is 1s2
The answer is A, do you want me to explain it? It’s pretty simple, you just need to follow all the signs in brackets and match them in those in the answer
Explanation:
The number of nitrogen atoms in one mole of nitrogen gas are <em><u>6.02214179×1023 nitrogen </u></em><em><u>atoms</u></em><em><u>.</u></em><em><u> </u></em>
<em>Hope this helps... </em>
