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Final Exam Review Worksheet

1)How many milligrams are there in 420 micrograms?  

0.42 mg

2)How many feet are there in 341 centimeters?  (There are 2.54 centimeters in 1 inch)

11.2 feet

3)How many significant figures are in the following numbers?

a)4.30      3c)120      2

b)1020      3d)1020.010      7

4)How many protons, neutrons, and electrons are there in 40K?

19 protons, 21 neutrons, 19 electrons

5)What is the electron configuration of mercury?

1s22s22p63s23p64s23d104p65s24d105p66s24f145d10

[Xe] 6s24f145d10

6)Name the following chemical compounds:

a)PbBr2 lead (II) bromide

b)NH3 ammonia

c)P4 phosphorus

d)CaS calcium sulfide

e)H2SO4 sulfuric acid

f)V(CO3)2 vanadium (IV) carbonate

g)P2O5 diphosphorus pentoxide

7)Write the chemical formulas for the following compounds:

a)ammonium nitrate NH4NO3

b)fluorine F2

c)boron trichloride BCl3

d)iron (III) phosphate FePO4

e)nitric acid HNO3

f)potassium carbonate K2CO3

g)dinitrogen tetrachloride N­2Cl4

For chemistry help, visit www.chemfiesta.com© 2002 Cavalcade Publishing, All Rights Reserved

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