What is the mass of #4.72 * 10^23# molecules of #Cr_3I#?

1 Answer
anor277
Mar 20, 2018

Well, #6.022xx10^23# formula units of #CrI_3# have a mass of #432.71*g...#

Explanation:

And here I have quoted the molar mass of #"Cr(III) iodide"#...

And so to get the mass of the given quantity...we take the product of the quotient....

#(4.72xx10^23" formula units of "CrI_3)/(6.022xx10^23 " formula units of "CrI_3*mol^-1)xx432.71*g*mol^-1-=0.784*cancel(mol)xx432.71*g*cancel(mol^-1)-=339.15*g#

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