Question

Three balloons filled with three different gaseous compounds each have a volume of 22.4 L at STP. Would these balloons have the same mass? Would they contain the same number of molecules? Explain.

Answer 1

Answer:

A. No; B. yes  

Explanation:

A. Mass

The balloons contain different gases, which will have different densities.

Mass = volume × density

     m = V × D

However, the volume is the same for all three balloons.

Thus m = kD

And the mass of the gas is directly proportional to the density.

Since the density varies, the mass varies.

B. Number of molecules

This is Avogadro's Hypothesis:

At the same conditions of temperature, equal volumes of gases contain the same number of molecules.

Answer 2

Three balloons filled with three different gaseous compounds each having a volume of 22.4 L at STP, would have different masses and the same number of molecules.

According to Avogadro's law, the same volumes of different gases in identical conditions of pressure and temperature, contain the same number of molecules. Thus, 3 balloons with the same volume (22.4 L) in identical conditions (STP = standard pressure and temperature) contain the same number of molecules, and as a consequence, the same number of moles (n).

Regarding the mass (m), we can calculate it using the following expression.

$m = n \times M$

where,

M: molar mass of each gas

Since different compounds tend to differ in their molar masses (M), even if they have the same number of moles (n), it is unlikely that they have the same mass (m).

Three balloons filled with three different gaseous compounds each having a volume of 22.4 L at STP, would have different masses and the same number of molecules.

You can learn more about Avogadro's law here: https://brainly.com/question/4133756