What mass is represented by #14.8*mol# #"barium chromate"#, and by #1.23xx10^22# chlorine molecules?

1 Answer
Apr 12, 2017

Answer:

We have under #4*kg# of #"barium chromate"#............and under #2*g# of #Cl_2#.

Explanation:

The molar mass of #"barium chromate"# is #253.37*g*mol^-1#. And thus the mass of the given quantity is #14.8*cancel(mol)xx253.37*g*cancel(mol^-1)=3750*g#.

For the #Cl_2# molecule, we solve the quotient:

#(1.23xx10^22*"chlorine molecules")/(6.022xx10^23*"chlorine molecules"*mol^-1)=0.0204*mol#.

Since the chlorine molecule has a molar mass of #70.90*g*mol^-1#, the mass of dichlorine is #70.90*g*mol^-1xx0.0204*mol=1.45*g#