Stoichiometry Prac

balance the equation
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)
How many grams of HCl are consumed by the reaction of 2.50 moles of magnesium?

• 5.00 g
• 7.29
• 182 g
• 218 g

Tags

NGSS.HS-PS1-7

balanced the equation
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)
What is the mass in grams of H₂ gas when 4.0 moles of HCl is added to the reaction?

• 0.99 g
• 4.0 g
• 2.0 g
• 6.0 g

Tags

NGSS.HS-PS1-7

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

Mg + 2H₂O --> Mg(OH)₂ + H₂

What volume (L) of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?

• 62.0 L

• 0.12 L

• 2.77 L

• 1.15 L

balanced the equation
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)
What is the volume of H₂ gas when 4.0 moles of HCl is added to the reaction?

• 45 L

• 44.8 L

• 89.6 L

• 90. 90. L