Stoichiometry Moles

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

• Write a Balanced Equation

• Panic

• Write an Unbalanced Equation

• Ask for help

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

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NGSS.HS-PS1-7

How many molecules are in 1 mole of CO₂?

• 4.6 molecules

• 4.6 grams

• 6.02 x 10 ²³ molecules

• 1.806x 10 ²⁴ atoms

Given the equation: 2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g) 2.00 moles of NaClO₃ will produce how many grams of O₂? (mass of O₂ = 32g/mol)

• 56 g of O₂

• 96 g of O₂

• 64 g O₂

• 32 g O₂

Tags

NGSS.HS-PS1-7

2H₂   +   O₂    −−〉 2H₂O
8.3 moles H₂ −−〉 ? moles H₂O

• 4.15

• 8.3

• 16.6

• 74.04

Tags

NGSS.HS-PS1-7

What is stoichiometry?

• The study of how the quantities of reactants and products are related in chemical reactions

• The study of the speed of reactions

• The study of how chemical reactions occur

• The study of types of reactions

What is a limiting reactant?

• the reactant that determines how much product can be made

• the reactant that is in excess

• the product that you can make the most of

• the amount of reactants that react with each other

SO₂ + PCl₅ --> SOCl₂ + POCl₃
How much SOCl₂ is produced when 16.2g SO₂ react with 13.7g PCl_5? 

• 7.87g

• 30.1g

• 26.4g

• 19.8g 

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NGSS.HS-PS1-7

The limiting reactant

• slows the reaction down

• is used up first

• is the reactant that is left over

• controls the speed of the reaction

4NH₃ + 5O₂ --> 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen? 

• 0.37g

• 0.045g

• 1.35g

• 11.1g

Tags

NGSS.HS-PS1-7