Well, because solids are..solid. When you mix things together like to make a cake, the ingredients are either very small solids that dissolve or liquids.
Ideal gas law PV = nRT or PM = dRt ( M is molecular mass of gas ) and d is gas density
where m/ M ( m is mass of gas sample )
m = dRT / P ( 2.78 g/L ) ( 0.082 L atm/ K mole )( 310K ) / 1.2 atm =
58.9 g/mol
gas must be butane ( C4H10) has molecular mass = 58.9 g/mol
The answer to the question is A.
As per the Equation,
Acceleration = Force/Mass
We Can Conclude That,
Acceleration of an object is affected by A). Net Force Acting On the Object and C). Object's Mass.
!! Hope It Helps !!