On a separate piece of paper, show ALL of your hand written work and include the correct units for each calculation. Write the chemical formula for all substances first if not provided.
CALCULATE THE MOLAR MASS FOR THE FOLLOWING COMPOUNDS/ELEMENTS 1-9.
1.
K2SO4
2.
CuO
3.
Barium phosphate chemical formula
molar mass
4.
Cobalt(II) fluoride chemical formula
molar mass
5.
Cu (CN)
Pb (C, H,02)
6.
7.
Tin (IV) chromate
chemical formula
molar mass
8.
Fluorine
chemical formula
molar mass
9.
Calculate the percentage (by mass) of each element in lead (II) acetate.
chemical formula
molar mass
% Pb
%C
% H
% O

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole

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