Stoichiometry Quiz

• 327.7 g NaCl

• 300.0 g NaCl

• 350.0 g NaCl

• 275.0 g NaCl

• 874 g Na₂SO₄

• 800 g Na₂SO₄

• 900 g Na₂SO₄

• 850 g Na₂SO₄

Tags

NGSS.HS-PS1-7

• 26.4 g NaOH

• 30.0 g NaOH

• 25.0 g NaOH

• 28.0 g NaOH

Tags

NGSS.HS-PS1-7

• 5.80 mol NaOH

• 6.00 mol NaOH

• 5.50 mol NaOH

• 5.90 mol NaOH

What is the balanced equation for the reaction between sodium and water?

• 2Na + 2H₂O → 2NaOH + H₂

• Na + H₂O → NaOH + H₂

• 2Na + H₂O → NaOH + H₂

• Na + 2H₂O → 2NaOH + H₂

What is the balanced equation for the reaction between calcium hydroxide and sodium sulfate?

• Ca(OH)₂ + Na₂SO₄ → CaSO₄ + 2NaOH

• Ca(OH)₂ + Na₂SO₄ → CaSO₄ + NaOH

• Ca(OH)₂ + 2Na₂SO₄ → CaSO₄ + 2NaOH

• Ca(OH)₂ + Na₂SO₄ → CaSO₄ + Na₂OH

Tags

NGSS.HS-PS1-7

What is the balanced equation for the decomposition of potassium chlorate?

• 2KClO₃ → 2KCl + 3O₂

• KClO₃ → KCl + O₂

• 2KClO₃ → KCl + O₂

• KClO₃ → 2KCl + 3O₂

• 1.5 mol O₂

• 1 mol O₂

• 2 mol O₂

• 0.5 mol O₂

Tags

NGSS.HS-PS1-7

What is the molar mass of sodium chloride (NaCl)?

• 58.44 g/mol

• 60.00 g/mol

• 55.00 g/mol

• 50.00 g/mol

How many of each type of atom are in Ca(OH)₂?

​ (a)   Ca

​ (b)   O

2 ​ (c)  

​ (d)   atoms total

• 1
• 2
• H
• 5
• 3
• OH
• Ca

Answer explanation

There is no number after the Ca, so there is one calcium. There is one O inside the parentheses, and a 2 outside the parentheses, so you multiply 1 x 2 = 2 oxygen. The same applies to the hydrogen.

1 Ca + 2 O + 2 H = 5 atoms total

Tags

NGSS.MS-PS1-1