Is acetylene heavier than air

Answer 1

In some sorts it is heavier than air based on recent test. so YES!!!!

ANS 2:There is only one sort of acetylene: H-CΞC-H. It does have two names, "Ethyne" being the other. The formula is C2H2. The formula weight (rounded) is thus 26 amu.

Dry air is ~79% Nitrogen (FW 28 amu) and ~21% Oxygen (FW 32 amu)

The weight for dry air is found by multiplying the partial pressures times the formula weights of the associated gas and totalling them up.

0.79 * 28 amu + 0.21 * 32 amu = 29 amu

Since 29>26 you can state with absolute certainty that Acetylene gas is less dense than air...so long as you are not near the very cold temperatures where any of the gases in question cease behaving as ideal gases.

NOTE: Before you scribble this down and turn it in, you would do well to rework the problem with the FW values rounded out to enough decimal points to allow you to meet the precision requirements of the assignment. For instance, the FW of (atomic) Oxygen is 15.9994 amu. I rounded to 16 amu to get the FW of 32 amu for Oxygen gas. There is a good chance that you'll also be able to pick up more precision on the composition of dry air if you happen to crack your textbook open.

Answer 2

Yes: The gram molecular mass of propane is about 44, greater than the gram molecular mass of either nitrogen (about 28) or oxygen (about 32), which are the principal constituents of air. Since propane, nitrogen, and oxygen are all nearly ideal gases at standard temperature and pressure, the concentrations of molecules of propane and air will be about the same, and the propane molecules have greater mass.

Answer 3

Yes. Propane's relative gas density is 1.55 times that of air.

Answer 4

Propane is more dense than air.

Answer 5

Yes.