In this question, you are asked to make 5% Calcium chloride(CaCl2) solution. For every 1000ml of water, the weight should be 1000grams. Then for 5% solution, the CaCl2 needed would be:
5% * 500 ml * 1gram/ml= 25grams
Calcium chloride is made from 1 calcium and 2 chlorine, so the molecular mass would be (1*40) + (2*35.5)= 111 gram/moles. Then, 25 grams of CaCl2 would be: 25gram / (111 gram/moles)= 25/111 moles.
Molarity unit is mole per 1000ml of solvent. So the molarity of the solution would be: (25/111 moles) / (500ml/1000ml)= 50/111M= 0.45M
Answer:
If there were no plants, the carbon dioxide level in the world would have risen in a much steeper way and the oxygen level would deplete in a much steeper way too.
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Conduction, idk if this is what you’re looking for but i hope this helps
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