How many milligrams is 40 micro-moles of glucose?

Answer 1

Answer: 7 x 10-3 g glucose

Process below:

First convert 40 µmol to moles. 1 µmol = 1 x 106 mol.

40 µmol x (1 mol)/(1 x 106µmol) = 4 x 10-5 mol

Multiply 4 x 10-5 mol by the molar mass of glucose (180.156 g/mol).

4 x 10-5mol glucose x (180.156 g glucose)/(1 mol glucose) = 7 x 10-3 g glucose

Answer 2

180.156 grams of glucose make 1 mole of glucose. So one mole of glucose will have 180,156 mg of glucose. One millimole of glucose will have 180,156/1000 = 180.156 mg of glucose. One micromole of glucose will have 180.156/1000 = 0.180156 mg of glucose. 40 micromole of glucose will have 7.2 mg of glucose. It is about 7 mg of glucose. Hence the answer. (You may not be able to weigh this exact quantity of glucose. For that you take one liter of distilled water. Add one gram of glucose to it. Stir well. Take out 7.2 ml solution. It contains 7.2 milligram of glucose in the solution.)

Answer 3

No of moles =Wt(g)/M.wt(g.mole-1)
=40 g/18 g.mole-1
=2.222 moles

Answer 4

0.040 mole