mole ratios

What part of a balanced chemical equation gives information about the number of moles?

• the subscripts

• the chemical symbol

• the mass

• the coefficients

How are mole ratios used in chemical calculations?

• to convert between moles of different substances

• to convert between mass units of the same substance

• to convert from mass to volume of different substances

Tags

NGSS.HS-PS1-7

How many moles of iron are needed to react with oxygen to produce 2 moles of iron(III) oxide in this equation?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

What is the mole ratio of oxygen to iron(III) oxide?

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Tags

NGSS.HS-PS1-7

How many moles of phosphine (PH₃) are produced when 1 mole of phosphorus reacts with 6 moles of hydrogen?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

What is the mole ratio of phosphorus to hydrogen?

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Tags

NGSS.HS-PS1-7