A certain particle carries `2.5 xx 10^-16C` of static electric charge. Calculate the number of electrons present in it.

Calculate the total number of electrons present in one mole of methane.

Calculate the total number of electrons present in 1.4g of dinitrogen gas.

In Milikan's experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is -1.282 xx 10^-18 C, Calculate the number of electrons present on it.

A current of 0.2 A passes through a metal wire for 20 seconds. Calculate the number of electrons passing through the cross section of the wire during this time. (The charge on an electron = 1.6 times 10^(-19) C)

A current of 800 mA is passed through an electric lamp for one minute. Find the number of electrons passing through it if the charge of electron is 1.6 xx 10^-19 C.

A pure silicon crystal has 4 xx 10^28 atoms m^-3 . It is droped by 1ppm concentration of antimony. Calculate the number of electrons and holes n_i = 1.2 xx 10^16//m^3

The value of K_w is 9.55 xx 10^(-14) at a certain temperature. Calculate the pH of water at this temperature.

A simplified model of hydrogen atom consists of an electron revolving about a proton at a distance of 5.3 xx 10^-1 1m. The charge on a proton is +1.6 xx 10^-19 C. Calculate the intensity of the electric field due to proton at this distance.

Choose correct alternative. A current of 3.2 ampere is flowing in a conductor. The number of electrons per second through the conductor will be [Charge on the electron = 1.6 xx 10^-19 coulomb].