What is the number of representative particles in 7.50 mol #SO_2#?

Answer 1

The mole is simply a number, #N_A# #=# #6.022140857xx10^23*mol^-1#

So if there are #7.50# #mol# #SO_2# molecules; there are #7.5xxN_A# individual #SO_2# molecules, and in that quantity there are #7.5xxN_A# individual #S# ATOMS, and #15xxN_A# individual #O# atoms. Are you with me?

We can use this number to specify the mass of the sulfur dioxide, because each of those individual particles has a definite and measurable mass, and this mass appears on the Periodic Table. Thus #1# #mol# #SO_2# has a mass of #32.06*g+2xx15.999*g#, approx. #64# #g#.

Can you tell the number of representative particles in a molar quantity of #SO_3# gas? How many sulfur atoms? How many oxygen atoms.

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Answer 2

Noah Aldrich

Approximately 4.53 x 10^24 representative particles are present in 7.50 mol SO2.

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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.