Some early mornings, dew drops can be found on grass or a car parked outside,
but not on other materials such as the sidewalk why is that?
a. the nighttime temperature on grass and the car went below the dew point, but
the temperature of the concrete did not drop enough to reach the dew point
level
b. temperature on the grass and sidewalk were both above the dew point levels all
night
c. the relative humidity of the air above the grass was higher than it was above the
concrete
d. none of the above

answer: a

explanation:

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

just did the assignment and the answer was #1 +2 n