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

1 Answer
anor277
Apr 9, 2016

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

Explanation:

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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