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:
plants or blue-green algae
Explanation:
The plants cells have chloroplasts that contain chlorophyll. When the cells are stained and observed under the microscope, chloroplast is seen. Chloroplast is only present in photosynthetic organisms. The chloroplast traps light that is used during photosynthesis.
Yes you can write a report about rocks and minerals. Use compare and contrast in the report. Perhaps describe how minerals and rocks came from.