CHEM 210 Organic Chemistry I Quick Revision Notes and Key Concepts Summary

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CHEM 210 KSU Exam | Premium
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What is the chemical symbol for an atom that has 29 protons and 36 neutrons?

A) Cu
B) Kr
C) N
D) Tb
E) S - Correct Answer✔✔-A) Cu

How many SO2 molecules are there in 1.80 mol of SO2?

A) 1.08 X 10^23 molecules SO2
B) 6.02 x 10^24 molecules SO2
C) 1.80 x 10^24 molecules SO2
D) 1.08 x 10^24 molecules SO2
E) 6.02 x 10^23 molecules SO2 - Correct Answer✔✔-D) 1.08 x 10^24

1.80 mol SO2 X
6.022x10^23 SP2 moles/1 mol SO2

=D

One of the choices below, which one is NOT an ionic compound? (Molecular
Compound)

A) PCl5
B) MoCl6
C) RbCl
D) PbCl2
E) NaCl - Correct Answer✔✔-A) PCl5

P: Non-metal Cl:
Non-metal

Which compounds do not have the same empirical formula?


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A) C2H2, C6H6
B) CO, CO2
C) C2H4, C3H6
D) C2H4O2, C6H12O6
E) C2H2, C8H8 - Correct Answer✔✔-B) CO, CO2

There are protons, neutrons, and electrons in 238 U 5+

A) 146 p, 92 n, 92 e-
B) 92 p, 146 n, 87 e-
C) 92 p, 146 n, 92, e-
D) 92 p, 92 n, 87 e-
E) 146 p, 92 n, 146 e- - Correct Answer✔✔-B) 92 p, 146 n, 87 e-

U => Atomic #:
92 => 92 p

Atomic Mass- Atomic #
238-92= 146 => 146 n

5+ charge => 92-5= 87 >> 87 e-

Predict the charge that an ion formed from Tellurium (Te) would have.

A) 1-
B) 6-
C) 3-
D) 4-
E) 2- - Correct Answer✔✔-E) 2-

Te will accept Xe- to gain Xe configuration

The ions Ca 2+ and (PO4) 3- forma and ionic compound with the formula .

A) CaPO4
B) Ca2(PO4)3
C) Ca2PO4
D) Ca(PO4)2
E) Ca3(PO4)2 - Correct Answer✔✔-E) Ca3(PO4)2

Ca 2+ (PO4) 3-
X
Ca 3- (PO4) 2+


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