Question

How do I know how many moles of one substance will react to another?

A. By calculating the molar mass of each substance.
B. By measuring the temperature change during the reaction.
C. By counting the number of atoms in the substances.
D. By observing the color change during the reaction.

Answer 1

To determine how many moles of one substance will react with another, use stoichiometric calculations involving molar masses and mole ratios from the balanced chemical equation, along with identifying the limiting reactant if necessary.

Step-by-step explanation:

To know how many moles of one substance will react with another, you need to follow a series of stoichiometric calculations. This involves converting given information into moles using molar mass. Then you use the mole ratios from the balanced chemical equation to find out how many moles of the reacting substances will interact. This process can be summarized in the following steps:

1. Balance the chemical equation for the reaction.
2. Calculate the number of moles of each reactant by using their molar masses.
3. Determine the limiting reactant, if necessary, to find out which reactant will be used up first.
4. Use mole ratios based on the balanced equation to convert moles of one substance to moles of another substance.
5. Finally, convert the moles of the products or remaining reactants to mass, if required, using their molar masses.