What is the molarity of the solution?

If dissolved 6.96mg of arginine (MW=174) in 100 ml of solution, what is the molarity of solution?

  • if dissolved 6.96mg of arginine (MW=174) in 100 ml of solution, what is the molarity of solution? molarity is something i can never get.. please helpp

  • Answer:

    m=0.00696g n=m/M=0.00696/174=4*10^-5 mol then 100mL=0.1L so Molarity =n/V=4*10^-5/0.1=4*10^-4mol/L

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formula: M=mol/L want: M know: 1000 mg = 1 g, 1000 mL = 1 L step 1: start with mg, go to g, go to mol step 2: convert mL to L step 3: use formula and solve for M step 4: ANS good luck. Note: in stoic. calc. its about lining up and canceling like units.

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