How many moles of Pb(NO3)2 are there in 10.0 mL of a 0.10 M solution?

Question

parthkohli · Answer

Hi!  0.10 M means that the number of moles of Pb(NO3)2 divided by the number of liters of the solution is 0.10.

parthkohli · Answer

$$0.10=\dfrac{\rm no~ of ~moles ~of~Pb(NO_3)_2 }{1/100}$$

parthkohli · Answer

Note that the 1/100 is there because 10 mL = 1/100 of a litre.  Now solve the equation.

anonymous · Answer

to find the number of moles of Pb(NO3)2, I first find the molar mass which comes to 331, and then how do I convert from g and ml to moles?

parthkohli · Answer

No... you don't need to do that.  I gave an equation above. Take a look at it.

anonymous · Answer

I don't understand how to solve without a value for the numerator

parthkohli · Answer

You want to get the number of moles of Pb(NO3)2.  The equation is$$0.10=\dfrac{\rm no~ of ~moles ~of~Pb(NO_3)_2 }{1/100}$$

parthkohli · Answer

Take 1/100 to the other side.