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- 1. Multiple Choice
6CO2 + 6H2O --> C6H12O6 + 6O2
What is the total number of moles of CO2 needed to make 2 moles of C6H12O6?
2.5
6
12
15
- 2. Multiple Choice
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)
12.00 moles of NaClO3 will produce how many grams of O2?
256 g of O2
576 g of O2
288 g O2
32 g O2
- 3. Multiple ChoiceCalculate the % composition by mass of oxygen present in H2SO4.16.3%65.25%32.6%57.14%
- 4. Multiple ChoiceDetermine the number of
atoms in
2.50 moles of zinc.1.51 x 1024 atoms4.15 x 10-24 atoms2.71 x 10-22 atoms163 atoms - 5. Multiple ChoiceA mole of carbon dioxide contains 6.02 x 1023 _____.atomsformula unitsionsmolecules
- 6. Multiple ChoiceHow many moles are 98.3 grams of aluminum hydroxide, Al(OH)3?1.26 moles0.8 moles7,673.4 moles150 moles
- 7. Multiple Choice
Convert 25 g of NaBr to molecules
102.96 molecules
0.24 molecules
1.45x1023 molecules
2.34 x 1020molecules
- 8. Multiple ChoiceBalance this equation
_Al +_HCl --> _H2 +_AlCl32, 6, 3, 2it is already balanced4, 12, 3, 42, 1, 4, 5 - 9. Multiple Choice
How many conversion factors are needed to solve the problem?
How many formula units of MgO can be produced from 345 g of Mg?
2 Mg + O2 → 2 MgO
1
2
3
4
- 10. Multiple Choice
XCO3 ---------- XO + CO2
The equation above shows the action of heat on the carbonate salt of metal X.
How many moles of XCO3 are needed to produced 4.0 g of oxide X?
[Relative atomic mass: C, 12; O, 16; X, 64]
0.03
0.05
0.08
0.09
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