A student takes a measured volume of 3. 00 M HCl to prepare a 50. 0 mL sample of 1. 80 M HCl. What volume of 3. 00 M HCl did the student use to make the sample? Use M subscript i V subscript i equals M subscript f V subscript f. 3. 70 mL 16. 7 mL 30. 0 mL 83. 3 mL.

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

What is the molar mass of ca(cio4)2

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)