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Eleventh Grade (Grade 11) Stoichiometry Questions

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Grade 11 Stoichiometry
What percent of lithium chloride is lithium?
  1. 33.0%
  2. 49.5%
  3. 16.5%
  4. None of the above
Grade 11 Stoichiometry
What percent of barium chloride is chlorine?
  1. 65.8%
  2. 32.9%
  3. 17.05%
  4. 34.1%
Grade 11 Stoichiometry
Which of the following is a standard rule for determining the solubility of a salt?
  1. All alkaline earth metal compounds are soluble.
  2. All transition metal compounds are soluble.
  3. All alkaline earth metal compounds are insoluble.
  4. All alkali metal compounds are soluble.
  5. All ammonium compounds are insoluble.
Grade 11 Stoichiometry
Dividing a number by 22.4 converts between which two units?
  1. moles to liters
  2. mass to atoms
  3. liters to moles
  4. atoms to mass
Grade 11 Stoichiometry
What can you use to convert mass to moles and moles to mass?
  1. liters
  2. gram-atomic mass
  3. 6.02x1023
  4. Avogadro's number
Grade 11 Stoichiometry
Which of the following stoichiometric calculations can be executed in the absence of knowledge of the molar mass?
  1. mass-mass problems
  2. mass-particle
  3. mass-volume
  4. volume-volume
Grade 11 Stoichiometry
Which of the following does not represent a correct stoichiometric representation of the following chemical equation?

2S(s)+3O2(g)→2SO3(g)?
  1. 2atoms S (s)+3molecules O2(g)→2molecules SO3(g)
  2. 2gS(s)+3gO2(g)→2gSO3(g)
  3. 2mol S (s)+3mol O2(g)→2mol SO3(g)
  4. none of the above
Grade 11 Stoichiometry
How do we convert volume to moles?
  1. Divide by 22.4 Liters/mol.
  2. Divide by 20 Liters/mol.
  3. Multiply by 22.4 Liters/mole.
  4. Multiply by 28 mol.
Grade 11 Stoichiometry
All of the following are valid combinations EXCEPT
  1. Liters/moles.
  2. particles/moles.
  3. grams/moles.
  4. kg/ºC.
Grade 11 Stoichiometry
How do you determine gram-formula mass mathematically?
  1. Subtract the elements' subscripts
  2. Subtract each element's atomic mass from each other
  3. Add together the products of the elements' atomic masses and their respective subscripts
  4. Multiply by the number of elements
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