The total number and the total mass of neutrons in 7 mg of `^(14)C`(assume the mass of a neutron = `1.675 xx 10^(-27) kg)`

Find the total mass of 'neutrons in 7 mg of ""^(14)C.

Find the total mass of protons in 34 mg of NH_(3) at STP.

One atomic mass unit is equal to 1.67 xx 10^-27 g .

Find the wavelength for a beam of neutrons,whose kinetic energy is 100 eV.Given that mass of neutron = 1.676 xx 10^(-24) g and h= 6.62 xx 10^(-27) erg s. .

The total number of neutrons present in 54mL H_2O(l) are :

Determine the de-Broglie wavelength of a proton, whose kinetic energy is equal to the rest mass energy of an electron. Given that the mass of an electron is 9.1 xx 10^(-31) kg and the mass of a proton is 1,837 times as that of the electron.

Assuming that protons and neutrons have equal masses,calculate how many times nuclear matter is denser than water.Given that nuclear radius is given by R=1.2 xx 10 ^(-15) A^(1//3) metre and mass of a nucleon = 1.67 xx 10^(-27) kg .