Transcript POTCHROM_molarmass.ppt

CALCULATION OF MOLAR
MASS
CALCULATE THE MOLAR MASS OF K2Cr2O7
LIST
ELEMENTS
HERE
X
=
X
=
X
=
CALCULATION OF MOLAR
MASS
CALCULATE THE MOLAR MASS OF K2Cr2O7
LIST
ELEMENTS
HERE
K
X
=
Cr
X
=
O
X
=
CALCULATION OF MOLAR
MASS
LIST
SUBSCRIPTS
LIST
ELEMENTS
HERE
MULTIPLY
By atomic mass
K2Cr2O7
K
2 X
=
Cr
2 X
=
O
7 X
=
CALCULATION OF MOLAR
MASS
LIST
SUBSCRIPTS
MULTIPLY
By atomic mass
INSERT
ATOMIC MASS
FROM PERIODIC TABLE
LIST
ELEMENTS
HERE
K
2 X 39.00 g/MOL
=
Cr
2 X 51.99 g/MOL
=
O
7 X 15.99 g/MOL
=
CALCULATION OF MOLAR
MASS
LIST
SUBSCRIPTS
MULTIPLY
By atomic mass
INSERT
ATOMIC MASS
FROM PERIODIC TABLE
LIST
ELEMENTS
HERE
K
2 X 39.00 g/MOL
=
79.98 g
Cr
2 X 51.99 g/MOL
=
103.98 g
O
7 X 15.99 g/MOL
=
111.93 g
Add SUBTOTALS
295.89 g/mol