If you are given #2.13 x10^24# atoms Au, how do you determine the moles in the sample and the mass of the sample?

Answer 1

Divide the given number by #"Avogadro's number"#, and then mulitply this number, the number of #"moles of gold"# by the #"molar mass"# of gold.

#"Moles of gold atom"# #=# #(2.13xx10^24" gold atoms")/(6.022xx10^23" gold atoms"*mol^-1)#
#~=# #3.5*mol#

Next, we multiply this figure by the gold molar mass:

#3.5*molxx197.0*g*mol^-1# #~=# #700*g#
Today's price of gold is #$38-00" USD "g^-1#.

What is the value of your mass?

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

To determine moles: ( \text{moles} = \frac{\text{given atoms}}{\text{Avogadro's number}} )

To determine mass: ( \text{mass} = \text{moles} \times \text{molar mass of gold} )

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 3

To determine the number of moles in the sample, divide the given number of atoms by Avogadro's number (6.022 x 10^23). To find the mass of the sample, multiply the number of moles by the molar mass of gold (approximately 197 grams per mole).

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.

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.

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.

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.

Not the question you need?

Drag image here or click to upload

Or press Ctrl + V to paste
Answer Background
HIX Tutor
Solve ANY homework problem with a smart AI
  • 98% accuracy study help
  • Covers math, physics, chemistry, biology, and more
  • Step-by-step, in-depth guides
  • Readily available 24/7