You need to make 0.500 L of a 60.0 mM CaCl2 solution from a 20.0 M CaCl2 stock solution. Determine how much stock solution and water you will need to make the dilute solution. Show your calculations.

14. The concentration of the original unknown protein solution is determined to be 0.2173 mg/mL. What is the protein concentration in the units of parts-per-million (ppm)? One ppm = 1 mg/L. 0.217 4602 217.3 217

A 50.0 mL portion of a 1.60 M solution is diluted to a total volume of 288 mL. A 144 mL portion of that solution is diluted by adding 115 mL of water. What is the final concentration? Assume the volumes are additive. concentration: M MacBook Air

Calculate the mass of NaOH in 300.0 mL of an 8.00% w/w NaOH solution. Density is 1.09 g/mL.

50.0g of NaCl was added to 500.0g of water. Calculate the mass percent of NaCl

How do you prepare 150.0 mL of a 0.340 M HCl solution from concentrated 12.0 M HCl? Group of answer choices A. 4.25 mL of concentrated HCl is added to 150.0 mL of DI water. B. 27.2 mL of concentrated HCl is added to 150.0 mL of DI water. C. 27.2 mL of concentrated HCl is diluted to a total volume of 150.0 mL of DI water. D. 4.25 mL of concentrated HCl is diluted to a total volume of 150.0 mL of DI water.

A student adds 500 mL of water to 200 mL of a 4 M KOH solution. Determine the molarity of the dilute KOH solution

Can you help me with question 1?

Given 675 milliliters of solution containing 0.365 grams Mg3(PO4)2Mg3(PO4)2, calculate the molarity of this solution. A. 0.000685 B. 0.00846 C. 0.000257 D. 0.00562 E. 0.00206

What volume of 3.25 mol/al stock solution is needed to make 2.5L of 1.50 mol/L solution?