one atomic mass unit (amu) = _____ kg

Q. The disappearance of one atomic mass unit (amu) releases $x$ MeV energy, then $x$ is :

Q. The simplest formula of the compound containing 50% X (atomic mass 10 amu) and 50% Y (atomic mass 20 amu) is:

Q. Molar mass of CO 3 2- = (12+ 48) amu = 60 amu no of moles = gn. weight / molecular weight = 3/60 = 0.05 moles no of ions = 6. 022 x 10^ 23 x 0.05 no of ions = 3.011 x 10^ 22 no.of oxygen atoms =no of ions x gn weight = 3.011 x 10^22 x 3 = 9.011 x 10 ^22

Q. How many moles of electron weight one kilogram?
a. 6.023 x 10^23
b. 1/9.108 x 10^31
c. 6.023/9.108 x 10^54
d. 1/9.108x6.023 x 10^8