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Topic 6: Mole : Mathematics of formulas and equations
1. Mole interpretation: Interpret ting quantity of mole in formulas
1. Which quantity can correctly be represented by the symbol “Ar” ?
1) 1 gram of atoms
3) 1 mole of atoms
2) 10 grams of atoms 4) 10 moles of atoms
2. Which quantity best describe the formula “N2”?
1) 2 grams of atoms 3) 1 Liter of atoms
2) 2 moles of atoms
4) 1 mole of atoms
3. Which quantity of particles is correctly represented by the formula “CO2” ?
1) 1 mole of molecules 3) 1 mole of atoms
2) 3 moles of molecules 4) 44 moles of atoms
4. In a sample of oxygen gas at STP., which represents the greatest number of molecules?
1) One molecule 3) One gram
2) One liter
4) One mole
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5. Which sample of water, H2O, contains the greatest number of water molecules?
1) One mole of H2O 3) One gram of H2O
2) Two moles of H2O 4) Two grams of H2O
2. Chemical formulas: Determining mole of atoms in formulas
1. How many different types of atoms are present in the formula (NH4)2HPO4 4) 16
1) 2
2) 4
3) 5
2. How many different types of atoms are in the formula Ba(OH)2. 8H2O ?
1) 3 2) 2 3) 3 4) 8
3. What is the total number of moles of nitrogen atoms in the formula NH4NO3?
1) 1 2) 2 3) 3 4) 4
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4. How many moles of oxygen atoms are present in the formula Be3(PO4)2?
1) 4 2) 8 3) 6 4) 12
5. What is the total number of moles of hydrogen in 1 mole of (NH4)2HPO4? 4) 9
2) 7
3) 8
1) 5
6. How many moles of oxygen atoms are present in one mole of CaSO4.3H2O? 4) 5
2) 4
3) 3
1) 7
7. What is the total number of atoms in one mole of Mg(ClO4)2?
1) 13 2) 3 3) 8 4) 11
8. The total number of atoms in one mole of BaCl2.2H2O is
1) 6 2) 7 3) 8 4) 9
9. What is the total number of moles of hydrogen atoms in 2 mole of (NH4)2SO4?
1) 8 2) 4 3) 16 4) 2
10. The total number of oxygen atoms in 0.5 mole of CaCO3.7H2O is
1) 10 2) 2 3) 5 4) 4
11. What is the total number of moles of atoms in 2 moles of H2SO4? 4) 6
3) 12
1) 14
2) 7
12. What is the total number of atoms in the 0.5 mole of formula Na2S2O3?
1) 7.0 2) 6 3) 14 4) 3.5
13. How many moles of hydrogen atoms are there in 2.5 moles of (NH4)2CO3.5H2O?
1) 8 2) 32.5 3) 45 4) 37.5
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 223
Topic 6: Mole : Mathematics of formulas and equations
1. Mole interpretation: Interpret ting quantity of mole in formulas
1. Which quantity can correctly be represented by the symbol “Ar” ?
1) 1 gram of atoms
3) 1 mole of atoms
2) 10 grams of atoms 4) 10 moles of atoms
2. Which quantity best describe the formula “N2”?
1) 2 grams of atoms 3) 1 Liter of atoms
2) 2 moles of atoms
4) 1 mole of atoms
3. Which quantity of particles is correctly represented by the formula “CO2” ?
1) 1 mole of molecules 3) 1 mole of atoms
2) 3 moles of molecules 4) 44 moles of atoms
4. In a sample of oxygen gas at STP., which represents the greatest number of molecules?
1) One molecule 3) One gram
2) One liter
4) One mole
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5. Which sample of water, H2O, contains the greatest number of water molecules?
1) One mole of H2O 3) One gram of H2O
2) Two moles of H2O 4) Two grams of H2O
2. Chemical formulas: Determining mole of atoms in formulas
1. How many different types of atoms are present in the formula (NH4)2HPO4 4) 16
1) 2
2) 4
3) 5
2. How many different types of atoms are in the formula Ba(OH)2. 8H2O ?
1) 3 2) 2 3) 3 4) 8
3. What is the total number of moles of nitrogen atoms in the formula NH4NO3?
1) 1 2) 2 3) 3 4) 4
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4. How many moles of oxygen atoms are present in the formula Be3(PO4)2?
1) 4 2) 8 3) 6 4) 12
5. What is the total number of moles of hydrogen in 1 mole of (NH4)2HPO4? 4) 9
2) 7
3) 8
1) 5
6. How many moles of oxygen atoms are present in one mole of CaSO4.3H2O? 4) 5
2) 4
3) 3
1) 7
7. What is the total number of atoms in one mole of Mg(ClO4)2?
1) 13 2) 3 3) 8 4) 11
8. The total number of atoms in one mole of BaCl2.2H2O is
1) 6 2) 7 3) 8 4) 9
9. What is the total number of moles of hydrogen atoms in 2 mole of (NH4)2SO4?
1) 8 2) 4 3) 16 4) 2
10. The total number of oxygen atoms in 0.5 mole of CaCO3.7H2O is
1) 10 2) 2 3) 5 4) 4
11. What is the total number of moles of atoms in 2 moles of H2SO4? 4) 6
3) 12
1) 14
2) 7
12. What is the total number of atoms in the 0.5 mole of formula Na2S2O3?
1) 7.0 2) 6 3) 14 4) 3.5
13. How many moles of hydrogen atoms are there in 2.5 moles of (NH4)2CO3.5H2O?
1) 8 2) 32.5 3) 45 4) 37.5
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 223
