Answer:
Bubbles will be formed when two solutions will be combined.
Explanation:
When the solution containing
and
as a solute will be combined, the reaction will be as follows,

As a result of combination of the two solutions bubbles will be formed which will depict the evolution of carbon dioxide gas.
Answer:
The molar mass of the gas is 44.19 g/mol
Explanation:
Amount of sample of gas = m = 13.5 g
Volume occupied by the gas = V = 5.10 L
Pressure of the gas = P = 149.83 KPa
1 KPa = 0.00986 atm
P = 
Assuming M g/mol to be the molar mass of the gas
Assuming the gas is behaving as an ideal gas

The molar mass of gas is 44.19 g/mol
I believe the answer is true
A polyatomic ion is a charged chemical species<span> made up of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as one unit. I hope this helped, sweetie.</span>