Calculate the number of moles in ` 1m^3` of gas at N. T. P

Calculate the number of moles in 10g of CH_4 .

Calculate the number of moles is 60g NaOH.

Calculate the mean KE of one mole of helium gas at 300 K.

An ambulance blowing a siren of frequency 700 Hz is travelling towards a wall with a speed 2 m(s)^-1.Calculate the number of beats heard in one second by the driver of the ambulance.(velocity of sound = 350 m(s)^-1 )

Calculate the amount of work done on 1gm-mole gas at 27^@C when volume increase twice isothermally.

Suppose a pure Si crystal has 5xx16^28 atoms. m^(-3) . It is doped by 1ppm concentraction of pentabalent As. Calculate the number of electron and holes. Given that n_i=1.5xx10^16m^(-3) .

The angular speed of a motor wheeen is increased from 1200 r.p.m to 3000 r.p.m. in 10 seconds. Calculate the number of revolutions made by the engine during the time.

Calculate the number of unpaired electrons in Cr^(3+) and V^(3+) ions.

Calculate the maximum nuber of electrons in the shell with principal quantum number n=3

Calculate the pH of 10^(-3) M HCI.