A "neon" sign contains 2.4¡Ñ10^2 mL of argon. Assuming that the gas is at standard temperature and pressure, there is 1.00 moles of gas per 22.4 L of volume. How many argon atoms are present in this sign?

Question

A "neon" sign contains 2.4¡Ñ10^2 mL of argon. Assuming that the gas is at standard temperature and pressure, there is 1.00 moles of gas per 22.4 L of volume. How many argon atoms are present in this sign? 
(a). 6.5¡Ñ10^21 
(b). 2.8¡Ñ10^22 
(c). 3.2¡Ñ10^24 
(d). 9.9¡Ñ10^-23

Ms. Sue · Answer

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DrBob222 · Answer

Ms Sue is right. I have given some information and/or hints to help working all of these except two or three. Those I will be happy to critique your work