Question

calculate the moles and millimoles of sulfuric acid in 100ml of 4M sulfuric acid

Answer 1

Given that volume = 100 ml

Molarity = 4 M

We know that moalrity = number of moles / volume in L

AND 1000 ml = 1.0 L

Therefore  

100 ml *1 L/1000 ml = 0.100 L

Number of moles =  molarirty * volume in L

= 4*0.1

= 0.4 moles

And 1000 milli mole = 1 moles  

Then  

0.4 mole * 1000 milli mole / 1 moles

= 400 millimolles