Question

which of the following is part of the first step when using stoichiometry to go from grams of a reactant to grams of a product?

mole ratio
mass of reactant
molar mass of product
mass of product

Explanation:

Identify the starting quantity in the stoichiometric conversion

$$ \text{Starting point} = \text{grams of reactant} $$

Determine the first conversion step

$$ \text{Step 1: } \text{grams of reactant} \xrightarrow{\text{divide by molar mass of reactant}} \text{moles of reactant} $$

Match the required quantity for the first step with the options

$$ \text{Required input quantity} = \text{Mass of reactant} $$

Answer:

• Mole ratio
• Mass of reactant (Correct answer)
• Molar mass of product
• Mass of product