How many air molecules are in a
10.5×12.0×10.0 ft
room (
28.2 l=1 f
t
3
)? assume atmospheric pressure of 1.00
atm
, a room temperature of 20.0
∘
c
, and ideal behavior.

try answer.com that works for me

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

explanation: