LT5.3 Stoichiometry

N₂ +  3 H₂ → 2 NH₃

How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6 mol H₂

• 2 mol H₂

• 3 mol H₂

• 1 mol H₂

2 H₂   +   O₂  →  2 H₂O

How many moles of water can be produced if 8 moles H₂ are used?

• 4 mol H₂O

• 8 mol H₂O

• 16 mol H₂O

• 2 mol H₂O

Tags

NGSS.HS-PS1-7

What is the ratio of moles of nitrogen to ammonia in the following reaction?

N₂ + 3 H₂  → 2 NH₃

• 1 : 2

• 1 : 1

• 1 : 3

• 2 : 3

Tags

NGSS.HS-PS1-7

Fe₂O₃(s) + 3 H₂(g) → 2 Fe(s) + 3 H₂O(l)

How many moles of iron can be made from 3 moles of Fe₂O₃?

• 6 moles Fe

• 4 moles Fe

• 2 moles Fe

• 1 moles Fe

Tags

NGSS.HS-PS1-7

Fe₂O₃(s) + 3 H₂(g) → 2 Fe(s) + 3 H₂O(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 KClO₃ → 2 KCl + 3 O₂

How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.73 mol O₂

• 1.05 mol O₂

• 10.05 mol O₂

• 4.50 mol O₂

Tags

NGSS.HS-PS1-7

What is the mole ratio in the following reaction?

2 CO  +  O₂  → 2 CO₂

• 2 : 1 : 2

• 1 : 1 : 1

• 1 : 2 : 1

• Have no clue what a mole ratios is!!

Tags

NGSS.HS-PS1-7

Mg(s) + 2 HCl(aq) → MgCl₂(aq) + H₂(g)

How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?

• 3.8 mol HCl

• 15 mol HCl

• 7.5 mol HCl

• 23 mol HCl

Tags

NGSS.HS-PS1-7

NaIO₃(aq) + 6 HI(aq) → 3 I₂(s) + NaI(aq) + 3 H₂O(l)

How many moles of iodine can be made from 6.55 moles of NaIO₃?

• 4.55 moles I₂

• 23.18 moles I₂

• 19.65 moles I₂

• 34.99 moles I₂

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation

• Panic

  😳

• Nothing...I don't stoich!

• Ask for help

  ????