A sample of N2O gas has a density of 2.697 g/L at 298 K. What must be the pressure of the gas (in mmHg)?

Explanation:

Given data

To find

Pressure

Solution

From Ideal gas law we know that

Substitute the given values to find pressure

So

Convert Atm to mmHg

Multiply the pressure values by 760

So

multiply 2kg by latent heat of vap

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s