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Chapter 9: Q76 E (page 511)

A 2.50Lsample of a colorless gas at STP decomposed to give 2.50L of N2 and 1.25L of O2 at STP. What is colorless gas?

Short Answer

Expert verified

The colorless gas's formula is N2O or dinitrogen oxide.

Step by step solution

01

Define Gas

One of the four fundamental states of matter, gas is made up of particles with no definite volume or structure.

02

What is colorless gas?

Using Avogadro’s law at the constant pressure and the temperature is:

\[{\rm{V \alpha n or V = k \times n}}\]

The 2.5Lsample will be 2.5L N2+ 1.25LO2.

The 2L sample will be 2L N2+ 1.O2.

The sample decomposes to generate the same volume of N2 but half the volume of O2, indicating that the sample has the same amount of nitrogen atoms as N2 but half the number of oxygen atoms as O2. As a result, the colorless gas's formula is N2O or dinitrogen oxide.

Therefore, the colorless gas is N2O.

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