More Stoichiometry

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

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

The Haber process for producing ammonia commercially is represented by the equation N₂ + 3H₂ → 2NH₃.  To completely convert 7.1 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?

• 14 mol
• 3.6 mol
• 11 mol
• 4.7 mol

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
 What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

• 13.8 g O₂
• 3.86 mol of O₂
• 124 g O₂
• 12.4 g O₂

Using the following equation:
2I₂(s) + KIO₃(aq) + 6HCl(aq) --> 5ICl(aq) + KCl(aq) + 3H₂O(l)
Calculate how many grams of iodine are needed to prepare 28.6 grams of ICl by this reaction.

• 17.88 g I₂
• 34.77 g I₂
• 29.50 g I₂
• 5.61 g I₂

C₅H₁₂O (l) combusts in air.  How many grams of water are produced when 56.44 grams of C₅H₁₂O combusts?

• 69.21 g H₂O
• 55.44 g H₂O
• 20.55 g H₂O
• 35.46 g H₂O

Using the following equation:
4NH₃(g) + 5O₂(g) --> 4NO(g) + 6H₂O(l)
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?

• 45.08 g O₂
• 133.33 g O₂
• 260.77 g O₂
• 75.92 g O₂

Tags

NGSS.HS-PS1-7

  In a Chemical Reaction, the Law of Conservation of Mass states? 

• Matter is present.
• Matter is NOT created or destroyed.
• Matter is created and destroyed. 

Tags

NGSS.HS-PS1-7

What is the mass of one mole of aluminum?

• 26.982 g
• 13 g
• 53.985 g
• 14 g