8.5gm/250ml = (x)gm/630ml

To make up a solution of phosphate buffered saline (PBS), you need 10 mM Na2HPO4 (anhydrous) (FW: 141.96 g/mol), 3 M NaCl (FW: 58.44 g/mol), and 5mM KH2PO4 (FW: 136.09 g/mol). How many grams of each will you need to make up 850 mL of PBS?

10 mL of 0.5 M CuSO₄ * 5H₂O solution from 10 M CuSO₄ * 5H₂O solution

Find the number of moles for acetylsalicylic acid when the mass is 5.08g.

How many mg in 1.35 g ? Report your answer to 3 decimal places (examples 1.042, 0.050, 0.198, 3.000).

Units of weight 23 0.0625 milligrams (mg) to micrograms (mcg) 24 600 grams (g) to kilograms (kg) 25 50 nanograms (ng) to micrograms (mcg)

How many moles of KBr are there in 89.5 mL of 0.150 M KBr?

6 x 10⁻⁵¹ = (0.15 M)² [S²⁻] [S²⁻] = (6 x 10⁻⁵¹) / (0.15 M)² Calculating, we find the minimum concentration of sulfide ion required: [S²⁻] ≈ 2.7 x 10⁻⁴⁹ M. check it calcution is write

A microorganism was cultured in a flask containing a liquid medium. Samples were taken hourly and number of cells counted using a counting chamber. The data are provided below in cells per mL. Draw a growth curve in Excel and use it to calculate generation time. The answer must be provided as a number (in minutes). Time Cells per mL 81235849 0 6 7 10 26 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 2.00E+04 2.20E+04 2.30E+04 2.40E+04 3.10E+04 5.00E+04 8.06E+04 1.30E+05 2.09E+05 3.38E+05 5.44E+05 8.78E+05 1.41E+06 2.28E+06 3.68E+06 5.93E+06 9.56E+06 1.54E+07 2.48E+07 4.01E+07 6.46E+07 1.04E+08 1.68E+08 2.71E+08 2.72E+08 2.73E+08

You are asked by the pharmacist to add 45 mEq of Ca Gluconate in an IV bag of D5W 1000mL. You have a concentrated vial of Ca Gluconate 4.4 mEq/mL, 50 mL. How many mL of this concentrated vial needs to be added to the IV bag?