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Using Moles to Balance Equations (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes

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Using Moles to Balance Equations

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What is the first step when using moles to balance equations?

Convert mass to moles

When simplifying mole ratios, what should you divide all values by?

The smallest mole amount

How many moles of $N_2$ are in $5.6$ g? (Mr of $N_2 = 28$ )

$0.2$ moles

How many moles of $H_2$ are in $1.2$ g? (Mr of $H_2 = 2$ )

$0.6$ moles

How many moles of $NH_3$ are in $6.8$ g? (Mr of $NH_3 = 17$ )

$0.4$ moles

What is the Mr (relative formula mass) of $N_2$ ?

$28$

In the ammonia example, what is the simplified ratio for hydrogen after dividing by $0.2$ ?

$3$

In the ammonia example, what is the simplified ratio for ammonia after dividing by $0.2$ ?

$2$

What is the balanced equation for making ammonia from nitrogen and hydrogen?

$N_2 + 3H_2 → 2NH_3$

What is the coefficient of hydrogen in the balanced ammonia equation?

$3$

Explore OCR GCSE Chemistry A, Combined (Gateway Science Suite) Revision Notes by Topics

Measurement, Mass & Equations

Calculating Mass of Substances

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Measurement, Mass & Equations

Calculating Mass of Substances

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Measurement, Mass & Equations

Calculating Mass of Substances

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Measurement, Mass & Equations

Calculating Mass of Substances

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