Question

Gram Formula Mass
Zn(C2H3O2)2 x 2H2O
i need help on how to add the #'s inside the ( )

Answer 1

do u want to find the molar mass inside ( ) ?

Answer 2

the whole problem please

Answer 3

ok....
to calculate the gram formula mass of (C2H3O2)2 [ which u say u need help of ]

first find the no.of atoms in that part
there r
C = 2 x 2 = 4
H = 2 x 3 = 6
O = 2 x 2 = 4


now find it in the usual way
the relative atomic mass of
Zn - 65
C - 12
H - 1
O - 16
so the Gram formula mass of Zn(C2H3O2)2
= 1zn + 4C + 6H + 4O
= 65 + (4x12) + (6x1) + (4x16)
= 65 + 48 + 6 + 64
= 183 g

but u have to find the G F M of Zn(C2H3O2)2 x H2O
which mean u have to add the G F M of H2O to 183 g

G F M of H2O = 2H + O = (2x1) + 16 = 18

then the G F M of Zn(C2H3O2)2 x H2O
= 183 + 18
= 201 g

hope this will help ya!