If you have a certain mass of a substance and want to use the mole ratio from th

Question

If you have a certain mass of a substance and want to use the mole ratio from the balanced equation in dimensional analysis, what calculation should first be done? No first step needed. Mole ratio is the same as mass ratio. Convert mass of the substance into moles using the molar mass. Then the molar ratio can be used. Use the ideal gas equation to solve for moles. Use avogadro's number to solve for the number of atoms or molecules. The limiting reactant in a reaction. has the lowest coefficient in a balanced equation. is the substance which is totally consumed when the chemical reaction is complete. is the substance for which you have the lowest mass in grams. is the substance that has the smallest molar mass.

Explanation / Answer

Question (4)

We know that Number of moles = mass / molar mass

Given mass so we have to convert this mass into moles by using its molarmass.

So the correct option is convert mass of the substance into moles using the molar mass .Then the molar ratio can be used.

Question (5)

The limiting reactant in a reaction is a substance which is totally consumed when the chemical reaction is complete.

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