Credit Protection #2

What is a mole ratio?

• An animal that burrows underground.

• How many moles of reactant are used up in a chemical reaction.

• The ratio of a reactant / product to a different one - compared by the number of particles.

• The process by which we multiply fractions by using numbers from a chemistry problem.

Tags

NGSS.HS-PS1-7

Where are the numbers for a mole ratio found?

• They are part of the chemical formulas for the reactants / products.

• They are given in the problem.

• They are found on the periodic table for those elements.

• They are found as coefficients in the reaction's balanced chemical equation.

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂ and NH₃ in the above reaction?

• 1 moles NH₃ / 2 moles N₂

• 2 moles NH₃ / 1 moles N₂

• 2 moles N₂ / 3 moles NH₃

• 1 moles N₂ / 3 moles NH₃

Tags

NGSS.HS-PS1-7

N₂ +  3H₂ → 2NH₃ 
What is the mole ratio between Nitrogen and Ammonium in the above reaction?

• 1 moles NH₃ / 2 moles N₂ 
• 2 moles NH₃ / 1 moles N₂ 
• 2 moles N₂ / 3 moles NH₃ 
• 1 moles N₂ / 3 moles NH₃ 

Tags

NGSS.HS-PS1-7

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

Balance the following equation using coefficients

___C₃H₈ +___O₂ --> ___CO₂ + ___H₂O

• 1,5,3,4

• 2,10,6,8

• already balanced

• 1,5,5,4

Balance the following equation using coefficients

__Na + __Cl₂ --> __NaCl

• 1,1,2

• 2,1,2

• 2,1,1

• already balanced

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

What is the oxidation number of nitrogen in N₂?

• -3

• 0

• +4

• -1