Direction: A solution was prepared by dissolving 100 mg of protein X in 100 ml of water.
Molecular weight of protein X is 15,000 Da; Avogadro’s number = 6.022 × 1023.
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Calculate the molarity (µM) of the resulting solution.
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- 66.6
- 6.6
- 0.67
- 0.067
Correct Option: A
Given, Molecular weight of the Protein X, m = 15,000
Da = 15,000 g/mol = 15 mg/mol
Weight of the Protein in solution, W = 100 mg
Volume of the solution, V = 100 mL
Therefore, molarity of the solution = (W/m) × (1000/V) M
= (100/15) × (1000/100)
= 66.67 M
