GRE Subject Test: Chemistry : Chemical Equations

Study concepts, example questions & explanations for GRE Subject Test: Chemistry

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Example Questions

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Example Question #11 : Reaction Chemistry

If  of  is used for the reaction given, how many grams of  was formed?

Possible Answers:

Correct answer:

Explanation:

Based on the molecular equation, for every 4 moles of  reacted, 2 moles of  is formed as a product:

We must calculate the molecular weight of :

To calculate the number of grams of , we need to convert the number of moles of  to grams using the molecular weight as a conversion factor.

Example Question #11 : Reaction Chemistry

If  of  is formed during the reaction given, how many grams of  was used?

Possible Answers:

Correct answer:

Explanation:

Based on the molecular equation, for every 2 moles of  formed, 1 mole of  is reacted:

We must calculate the molecular weight of :

To calculate the number of grams of , we need to convert the number of moles of  to grams using the molecular weight as a conversion factor.

Example Question #12 : Reaction Chemistry

If  of  is formed during the reaction given, how many grams of  was used?

Possible Answers:

Correct answer:

Explanation:

Based on the molecular equation, for every 3 moles of  formed, 1 mole of  is reacted:

We must calculate the molecular weight of :

To calculate the number of grams of , we need to convert the number of moles of  to grams using the molecular weight as a conversion factor.

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