1. B, helium
2. B, carbs-lipids-nucleic acids-proteins
hope I helped
66.8g to mg is 66800 hope this helps
Answer:
B
Explanation:
The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither <u><em>created</em></u> nor <u><em>destroyed</em></u> in chemical reactions. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.
