The molecular weight of vincristine, a pharmaceutical drug, is 923.04 g/mol. It

Question

The molecular weight of vincristine, a pharmaceutical drug, is 923.04 g/mol. It is supplied in 1 mg per vial. You want to treat your culture cells with a final concentration of 7 hM vincristine and will need 12 mL of cells for your experiment. You only want to add 21 mL of vincristine solution to your cells. What concentration should you make your stock solution of vincristine in order to make this 21 uL addition?

**Using .001mL is not correct!!*

The molecular weight of vincristine, a pharmaceutical drug, is 923.04 g/mol. It is supplied in 1 mg per vial. You want to treat your culture cells with a final concentration of 7 hM vincristine and will need 12 mL of cells for your experiment. You only want to add 21 mL of vincristine solution to your cells. What concentration should you make your stock solution of vincristine in order to make this 21 uL addition? **Using .001mL is not correct!!*

Explanation / Answer

mol wt = 923.04

Final conc = 7 nano molar

I think you wish to prepare 12 mL of 7 nanomolar solution from a solution ( whose conc is to be determined) so that you will take its only 21 micro L if so then

m1v1 = m2v2

7 X 10^-9 X 12 X 10-3 L = 21 X 10-6 X M2

M2 = 4 micro molar solution will be prepared

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