Molar Ratio

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?

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How many moles of Aluminum oxide are produced if you have 2 moles of Al?

• 3 mole

• 2 mole

• 1 mole

• 0.5 mole

Tags

NGSS.HS-PS1-7

What is the total number of moles of water needed to produce 2.5 moles of C₆H₁₂O₆?

• 2.5

• 6

• 12

• 15

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

A problem asks how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C₂H₆). What is the second step in setting up the problem?

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Tags

NGSS.HS-PS1-7

Mole ratios are obtained from the

• balanced chemical equation

• periodic table

• molar mass

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

Tags

NGSS.HS-PS1-7

In a balanced equation, the ratio between the coeffients of any two substances is called the _______.

• mole ratio

• stoichiometry

• limiting reactant

• excess reactant

Tags

NGSS.HS-PS1-7

The coefficients in a chemical equation represent the

• number of atoms in each compound in a reaction

• relative numbers of moles of reactants and products

• masses, in grams, of all reactants and products

• number of valence electrons involved in the reaction

Tags

NGSS.HS-PS1-7

Mole ratios are obtained from the ________________.

• balanced chemical equation

• molar masses

• periodic table

• subscripts

Select the correct molar ratio taken from this balanced equation:

• N­₂ = 3 H₂

• 1 mol N­₂ = 2 mol NH₃

• 2 mol N­₂ = 1 mol NH₃

• 3 mol N­₂ = 3 mol NH₃

Tags

NGSS.HS-PS1-7