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Moles; Chemical Formula of Stable Molecule; Valence Electrons; Theoretical Yield etc.

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Question 1
OH is a common ingredient in all...
a) alcohols
b) benzene rings
c) amines
d) organic molecules

Question 2
One mol of chromium weighs 24 grams, true or false?

Question 3
Cesium and oxygen combine to form a stable molecule. The chemical formula is
a) CsO
b) CsO3
c) Cs2O
d) Cs3O2

Question 4
How many valence electrons does a carbon atom have?
a) 1
b) 2
c) 3
d) 4
e) 6

Question 5
What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr2O3 with 8.00 g of aluminum according to the following equation?
2Al + Cr2O3 Al2O3 + 2Cr
a) 7.7 g
b) 15.4 g
c) 27.3 g
d) 30.8 g
e) 49.9 g

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Solution Summary

The solution gives short explanations to answer each multiple choice question.

Solution Preview

1. b) alcohol
2. False
because Cr's molar mass is 52.0 g /mol. So, each mole of Cr weighs 52.0 g
3. c) Cs2O
because Cs has a ...

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