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Multiple Choice Questions

6 ) Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is:

7 ) Which pair of elements would be most likely to form an ionic compound?
P and Br
Cu and K
C and O
O and Zn
Al and Rb

8 ) Which is the formula for the binary compound of potassium and nitrogen?
KN
K2N
NK2
K3N
NK3

9) On the average an atom of uranium (U) is approximately how many times heavier than an atom of potassium?
6.1 times
4.8 times
2.4 times
12.5 times
7.7 times

10
How many protons and electrons are present in a Br– ion?
35 p, 35 e
80 p, 81 e
35 p, 34 e
35 p, 36 e
80 p, 34 e

Solution Preview

6) Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is:

Density = Mass / Volume

7.86 g/cm3 = (55.85 g) / Volume
or Volume = (55.85 g) / (7.86 g/cm3) = 7.10 cm3

Answer: Volume = 7.10 cm3

7) Which pair of elements would be most likely to form an ionic compound?
P and Br
Cu and K
C and O
O and Zn
Al and Rb

Answer: O and Zn

When the electro negativity of two bonded atoms differ greatly the ...

Solution Summary

Answers to Multiple Choice Questions

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