In stoichiometry, what is molar mass used for?

Answer 1

Serenity Allen

In stoichiometry, molar mass is used to convert between the mass of a substance and how many moles of a substance.

For example: The molar mass of water is 18g/mol
Q: How many moles are there in a 4.5g sample of water?

#(4.5g H_2O)/1 x (1 mol H_2O)/(18g H_2O)# = 0.25 mol #H_2O#

In both of the videos below, molar mass is used to convert between mass (g) and mole amounts of chemical substances.

Video from: Noel Pauller

Hope this helps!

Sign up to view the whole answer

By signing up, you agree to our Terms of Service and Privacy Policy

Sign up with email

Answer 2

Luna Chen

In stoichiometry, molar mass is used to convert between the mass of a substance and the number of moles of that substance, allowing for calculations involving mass relationships in chemical reactions.

Sign up to view the whole answer

By signing up, you agree to our Terms of Service and Privacy Policy

Sign up with email

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.