The molecular formula of calcium chloride is CaCl2. What is the molecular weight of this drug?

1 Answer
Grace
Dec 23, 2015

#111# #g#/#"mol"#

Explanation:

Weight of #Ca# = #40#
Weight of #Cl# = #35.5#

Molecular formula is #CaCl_2# i.e. #1# atom of #Ca# and #2# atoms of #Cl#.

Hence, molecular weight = #"1 x 40 + 2 x 35.5"# = 40 + 71 = #111# #g#/#"mol"#. But if you look at the weight online, it says #110.98# #g#/#"mol"#, which is close to #111#.

Hope this helps!

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