1: Mercury - Hg
2: Silver - Ag
3: Gold - Au
4. Aluminium - Al
5: Iron - Fe
6: Helium - He
7: Calcium - Ca
8: Magnesium - Mg
9: Nickel - No
6,02·10²³ --- 1 mol
X -------------- 6,5 mol
X = 6,02·10²³×6,5
X = 39,13·10²³ molecules of Cl₂
Answer:
Organisms and humans depend on each other to get by. Environmental science is important because it enables you to understand how these relationships work.
For example, humans breathe out carbon dioxide, which plants need for photosynthesis. Plants, on the other hand, produce and release oxygen to the atmosphere, which humans need for respiration.
Animal droppings are sources of nutrients for plants and other microorganisms. Plants are sources of food for humans and animals. In short, organisms and humans depend on each other for survival.
Explanation:
<span>The stopper should be held until it can be safely re-inserted. Placing it on any other type of surface or table could run the risk of cross-contamination. This could cause issues with the reagent when the stopper is replaced.</span>