Question

1. Balance the following nuclear equations a) 194        190               Pt -> Os + ___________ 78      &nbs

1. Balance the following nuclear equations

a)

194        190         

     Pt -> Os + ___________

78           76

b)

228                                  0

     Ra -> _________ +   e

88                                   -1

2.

Predict the formula when the following monatomic ions combine

a. Ca and S _______________

b. Mg and Br _________________

c. K and N_____________________

d. Al and O _______________

e. Na and F ______________________

3.

Predict the formula of the following containing polyatomic ions

a. Ca and PO4-3 ______________

b. Al and OH-1 _________________

Name the following compounds containing polyatomic ions

c. (NH4)2O ______________

d. Mg(NO3)2 ____________________

4. How many grams are in 1.4 moles of Ca(NO3)2?

5. How many moles are in 25 g of CaCl2?

6. What is the percent composition of Al(OH)3?

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