1. How many atoms are in a 2.4 moles
2. How many moles would 42.2 grams
of oxygen equal?
3. What is the molecular weight of
elemental chlorine? (Hint: There's something kind of unique about chlorine.)
4. How much would 3.6 moles of NaCl
5. How many molecules are in 64.3
grams of water?
6. If you react 3 moles of hydrogen
gas with oxygen, how many moles of water will you get. Write the
balanced reaction equation.
7. For the reaction 2 Mg + O2 ->
2 MgO we did in the crucible at the beginning of the semester, say you
burned 15.3 g of magnesium. How much would the product weigh?
8. Balance the following equation:
____ C6H12O6 + _____O2 -> ____CO2
9. If you had 3 liters of an 8.0
molar solution of salt water, how many moles of salt would remain if the
water was removed (boiled away)?
10. You want to neutralize .33 L
of 1.0 M HCl solution. There is a container of 4.0 M NaOH solution
in the lab. How much of the basic solution should you use to completely
neutralize the acid. Further, should you use a little bit more, just
to be sure you got it all?
11. How many moles of salt will the
reaction above yield? (This problem has a number of steps -all of
which you have attempted in the previous problems- but show all your
work so you can demonstrate mastery even if the final answer is incorrect
due to mathematical error).
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