Page 241 - Chemistry eBook
P. 241
Mole Calculations
The question will be asked like this:TWabhlaetTis the mass of _ moles of _? Important Formulas and Equations
Look out for the words mass and moles.
d = density m = mass
V = volume
Just plug in the values and solvme!easured value – accepted value
m Reffy, Table T (p.12) V
Density d =
Mole Calculations
Percent Composition
Concentration
% composition by mass = mass of part mass of whole
number of moles =
mass of solution
molarity = moles of solute liter of solution
given mass
gram-formula mass
accepted value
× 100
Flip to the next card
The good news is that Reffy will tell us
Percent Error % error =
There are many Regents questions on this topic.
how to solve this one.
× 100 for an example. parts per million = mass of solute × 1 000 000
UNIT 6: MATH IN CHEMISTRY © 240
PV PV
P = pressure
