On Level Stoichiometry Review

To determine the limiting reactant in a chemical reaction, one must know the

• amount of product formed
• available amount of one of the reactants
• available amount of each of each reactant
• speed of the reaction

Tags

NGSS.HS-PS1-7

The coefficients in a chemical equation represent the

• number of atoms in each compound in a reaction
• relative numbers of moles of reactants and products
• masses, in grams, of all reactants and products
• number of valence electrons involved in the reaction

Which reactant controls the amount of product formed in a chemical reaction?

• mole ratio
• composition reactant
• excess reactant
• limiting reactant

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation 2Fe + O₂ → 2FeO, how many grams of iron(II) oxide are produced from 8.55 mol of iron in an excess of oxygen?

• 307 g
• 8.40 g
• 447 g
• 614 g

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation Pb(NO₃)₂ + 2 KI → PbI₂ + 2 KNO₃, how many moles of lead(II) iodide are produced from 239 g of potassium iodide and an excess of lead(II) nitrate?

• 1.44 mol
• 0.722 mol
• 1.44 mol
• 0.720 mol

In the equation 2KClO₃ → 2KCl + 3O₂, how many moles of oxygen are produced when 6.7 mol of KClO₃ decompose completely?

• 6.7 mol
• 1.0 mol
• 10.1 mol
• 4.5 mol

For the reaction represented by the equation SO₃ + H₂O → H₂SO₄, how many grams of sulfur trioxide are required to produce 3.94 mol of sulfuric acid in an excess of water?

• 386 g
• 20.3 g
• 0.0492 g
• 315 g

If, in the reaction A + B → C + D, the quantity of B is insufficient to react with all of A,

• A is the limiting reactant
• B is the limiting reacant

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation 2Na + Cl₂ → 2NaCl, how many grams of sodium chloride can be produced from 500. g each of sodium and chlorine?

• 409 g
• 824 g
• 319 g
• 112 g

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation 2HNO₃ + Mg(OH)₂ → Mg(NO₃)₂ + 2H₂O, how many grams of magnesium nitrate are produced from 8.64 mol of nictric acid, HNO₃, and an excess of Mg(OH)₂?

• 156 g
• 3
  320 g
• 445 g
• 641 g

Tags

NGSS.HS-PS1-7