How many grams of cacl2 are needed to make3.5l (3500ml)
of a 15% calcium chloride solution?

525 grams

Explanation:

Assuming the solution to be prepared is 15% by weight calcium chloride, it means 15 grams of calcium chloride will be in 100 mL of solution.

To calculate the amount needed to make 3500 mL solution;

15 g is required to make 100 mL

X g is required to make 3500 mL

X = 15 x 3500/100

          = 525 g

Therefore, 525 grams of calcium chloride will be needed to make 15%, 3500 mL of calcium chloride solution.

i need

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.