If you use 19 ml of 0.100 m kmno4, how many moles have you used? the answer has to be in four decimal places (do not forget the leading zero). no scientific notation.
how much 5.0 m h2so4 needs to be used to make 152 ml of 1.0 m? round answer to nearest whole number and omit units.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.