Question 1

How many protons are there in a molecule of adrenaline (C9H13NO3) , a neurotransmitter and hormone?

Accepted Answer

A)  22
B)  26
C)  43
D)  98
E)  183F) A) and E)
G) B) and D)

Question 2

Sodium bromate is used in a mixture which dissolves gold from its ores. Calculate the mass in grams of 4.68 mol of sodium bromate.

Accepted Answer

A)  706 g
B)  482 g
C)  383 g
D)  32.2 g
E)  0.0310 gF) A) and B)
G) B) and D)

Question 3

In the combustion analysis of 0.1127 g of glucose (C6H12O6) , what mass, in grams, of CO2 would be produced?

Accepted Answer

A)  0.0451 g
B)  0.0825 g
C)  0.1652 g
D)  0.4132 g
E)  1.466 gF) A) and B)
G) A) and C)

Question 4

Which of the following samples contains the greatest total number atoms?

Accepted Answer

A)  50.0 g of Li 2O
B)  75.0 g of CaO
C)  200.0 g of Fe 2O 3
D)  50.0 g of CO 2
E)  100.0 g of SO 3F) B) and E)
G) B) and C)

Question 5

Calculate the molar mass of (NH4) 3AsO4.

Accepted Answer

A)  417.80 g/mol
B)  193.03 g/mol
C)  165.02 g/mol
D)  156.96 g/mol
E)  108.96 g/molF) A) and B)
G) A) and C)

Question 6

Copper(II)  sulfate pentahydrate, CuSO4·5H2O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO4·5H2O.

Accepted Answer

A)  249.7 g
B)  144.0 g
C)  96.00 g
D)  80.00 g
E)  64.00 gF) A) and D)
G) A) and E)

Question 7

Which of the following samples has the most moles of the compound?

Accepted Answer

A)  50.0 g of Li 2O
B)  75.0 g of CaO
C)  200.0 g of Fe 2O 3
D)  50.0 g of CO 2
E)  100.0 g of SO 3F) A) and C)
G) A) and B)

Question 8

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides)  are needed to form 485 g of sulfur tetrafluoride? 3SCl2(l)  + 4NaF(s)  → SF4(g)  + S2Cl2(l)  + 4NaCl(s)

Accepted Answer

A)  1940 g
B)  1510 g
C)  754 g
D)  205 g
E)  51.3 gF) A) and B)
G) A) and C)

Question 9

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl3. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

Accepted Answer

A)  214 g
B)  245 g
C)  321 g
D)  489 g
E)  643 gF) B) and D)
G) A) and D)

Question 10

Balance the following equation: UO2(s)  + HF(l)  → UF4(s)  + H2O(l)

Accepted Answer

A)  UO 2( s) + 2HF( l) → UF 4( s) + H 2O( l) 
B)  UO 2( s) + 4HF( l) → UF 4( s) + 2H 2O( l) 
C)  UO 2 ( s) + H 4F 4( l) → UF 4 ( s) + H 4O 2( l) 
D)  UO 2( s) + 4HF( l) → UF 4( s) + 4H 2O( l) 
E)  UO 2( s) + 8HF( l) → 2UF 4( s) + 4H 2O( l) F) None of the above
G) A) and E)

Question 11

Magnesium fluoride is used in the ceramics and glass industry. What is the mass of 1.72 mol of magnesium fluoride?

Accepted Answer

A)  43.3 g
B)  62.3 g
C)  74.5 g
D)  92.9 g
E)  107 gF) B) and D)
G) C) and D)

Question 12

A single atom of hydrogen has a mass of 1.0 amu, while a mole of hydrogen atoms has a mass of 1.0 g. Select the correct conversion factor between atomic mass units and grams.

Accepted Answer

A)  1 amu = 1 g exactly
B)  1 amu = 6.0 × 10 23 g
C)  1 g = 6.0 × 10 23 amu
D)  1 g = 1.7 × 10 −24 amu
E)  None of these choices are correct.F) A) and B)
G) D) and E)

Exam 3: Stoichiometry of Formulas and Equations

In the combustion analysis of 0.1127 g of glucose (C₆H₁₂O₆) , what mass, in grams, of CO₂ would be produced?

Correct Answer
verified

How many protons are there in a molecule of adrenaline (C₉H₁₃NO₃) , a neurotransmitter and hormone?

Correct Answer
verified

Magnesium fluoride is used in the ceramics and glass industry. What is the mass of 1.72 mol of magnesium fluoride?

Correct Answer
verified

Copper(II) sulfate pentahydrate, CuSO₄·5H₂O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO₄·5H₂O.

Correct Answer
verified

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride? 3SCl₂(l) + 4NaF(s) → SF₄(g) + S₂Cl₂(l) + 4NaCl(s)

Correct Answer
verified

Calculate the molar mass of (NH₄) ₃AsO₄.

Correct Answer
verified

Which of the following samples contains the greatest total number atoms?

Correct Answer
verified

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl₃. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

Correct Answer
verified

Balance the following equation: UO₂(s) + HF(l) → UF₄(s) + H₂O(l)

Correct Answer
verified

Which of the following samples has the most moles of the compound?

Correct Answer
verified

Sodium bromate is used in a mixture which dissolves gold from its ores. Calculate the mass in grams of 4.68 mol of sodium bromate.

Correct Answer
verified

A single atom of hydrogen has a mass of 1.0 amu, while a mole of hydrogen atoms has a mass of 1.0 g. Select the correct conversion factor between atomic mass units and grams.

Correct Answer
verified

Exam 3: Stoichiometry of Formulas and Equations

In the combustion analysis of 0.1127 g of glucose (C6H12O6) , what mass, in grams, of CO2 would be produced?

Correct AnswerverifiedShow Answer

How many protons are there in a molecule of adrenaline (C9H13NO3) , a neurotransmitter and hormone?

Correct AnswerverifiedShow Answer

Magnesium fluoride is used in the ceramics and glass industry. What is the mass of 1.72 mol of magnesium fluoride?

Correct AnswerverifiedShow Answer

Copper(II) sulfate pentahydrate, CuSO4·5H2O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO4·5H2O.

Correct AnswerverifiedShow Answer

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride? 3SCl2(l) + 4NaF(s) → SF4(g) + S2Cl2(l) + 4NaCl(s)

Correct AnswerverifiedShow Answer

Calculate the molar mass of (NH4) 3AsO4.

Correct AnswerverifiedShow Answer

Which of the following samples contains the greatest total number atoms?

Correct AnswerverifiedShow Answer

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl3. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

Correct AnswerverifiedShow Answer

Balance the following equation: UO2(s) + HF(l) → UF4(s) + H2O(l)

Correct AnswerverifiedShow Answer

Which of the following samples has the most moles of the compound?

Correct AnswerverifiedShow Answer

Sodium bromate is used in a mixture which dissolves gold from its ores. Calculate the mass in grams of 4.68 mol of sodium bromate.

Correct AnswerverifiedShow Answer

A single atom of hydrogen has a mass of 1.0 amu, while a mole of hydrogen atoms has a mass of 1.0 g. Select the correct conversion factor between atomic mass units and grams.

Correct AnswerverifiedShow Answer

In the combustion analysis of 0.1127 g of glucose (C₆H₁₂O₆) , what mass, in grams, of CO₂ would be produced?

Correct Answer
verified

How many protons are there in a molecule of adrenaline (C₉H₁₃NO₃) , a neurotransmitter and hormone?

Correct Answer
verified

Correct Answer
verified

Copper(II) sulfate pentahydrate, CuSO₄·5H₂O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO₄·5H₂O.

Correct Answer
verified

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride? 3SCl₂(l) + 4NaF(s) → SF₄(g) + S₂Cl₂(l) + 4NaCl(s)

Correct Answer
verified

Calculate the molar mass of (NH₄) ₃AsO₄.

Correct Answer
verified

Correct Answer
verified

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl₃. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

Correct Answer
verified

Balance the following equation: UO₂(s) + HF(l) → UF₄(s) + H₂O(l)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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