An ideal gas is held in a canister of volume V, at pressure P, and temperature T. Subsequently, the movement of a piston doubles the volume (to 2 V), while the temperature is also doubled (to 2 T), in absolute units (e. g. Kelvin). What is the new pressure

Using the ideal gas law we can determine this:

PV = nRT

n and R are constants but V and T are doubled:

that is the same as multiplying the entire equation by 2:

2(PV) = 2(nRT)

Therefore if we distribute we can get what is wanted:

P*2V = n*R*2T

Which then shows that pressure would stay constant if temperature and volume were to both double.

ammonium chloride & tallow

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer