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:
coccyx can be another name for a Tailbone
Explanation:
The coccyx is a triangular arrangement of bone that makes up the very bottom portion of the spine below the sacrum. It represents a vestigial tail, hence the common term tailbone.
Bull run was the first land battle of the civil war.
Answer:
When two plates come together, it is known as a convergent boundary. The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench. ... Two plates sliding past each other forms a transform plate boundary.