Stoichiometry (Ar, Mr, % mass, mole & calculations)

__NaOH + __H₂SO4 --> __Na₂SO₄ + __H₂O

What coefficients are needed to balance the reaction?

• 2, 2, 1, 2

• 2, 1, 2, 2

• 2, 1, 1, 2

Using the following equation:

Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)

How many moles of iron can be made from 6 moles H₂?

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)

12.00 moles of NaClO₃ will produce how many moles of O₂?

• 36 mol

• 18 mol

• 6 mol

2H₂ + O₂ −−〉 2H₂O

How many grams of H₂O can be produced from 3.20 g of O₂?

• 7.2 g

• 3.6 g

• 2.2 g

• 1.8 g

In the equation 2 Al₂O₃ --> 4 Al + 3 O₂, what is the mole ratio of aluminum to oxygen?

• 10:6 
• 3:4
• 4:3
• 2:3

Tags

NGSS.HS-PS1-7

What is the relative molecular mass of (NH₄)₂CO₃ ?

• 144

• 138

• 96

• 96 g

What is the volume of 6 moles of carbon dioxide gas?

• 264 dm³

• 144 dm³

• 144 cm³

N₂ + 3H₂ → 2NH₃

What is the volume of hydrogen are needed to react with 2.8g of nitrogen?

• 7.2 dm³

• 14.4 dm³

• 8.4 dm³

• 0.6 dm³

2Na + Cl₂ --> 2NaCl

5.85g of NaCl is formed. What is the mass of Na used?

• 4.6 g

• 1.15 g

• 2.3 g

• 1.1 g

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Tags

NGSS.HS-PS1-7