Mass no

Mass of products is equal to mass of reactants.

Calculate the mass of urea ("NH"_(2)"CONH"_(2)) required in making 2.5 kg of 0.25 molar aqueous solution. We know that molarity (m) =("Moles of solute")/("Mass of solvent in kg") and moles of soute =("Mass of solute")/("Molar mass of solute") So, find the molar mass of solute by adding atomic masses of different element present in it and mass by using the formula, Molality =("Mass of solute/molar mass of solute")/("Mass of solvent in kg")

calculate the mass defect of Helium [""._(2)He^(4)] mass of proton =1.007276 u, Mass of neutron =1.008665u, Mass of ""._(2) He^(4)= 1.001506 u,

Staements I: The nucleus ._Z^AX is having atomic mass as well as its mass number as A . Staements II: Mass number of an element is an integer that specifies an isotopes and has no units, while atomic mass is generally not an integer.

Assertion: The ratio of intertial mass to gravitational mass is equal to one. Reason: The inertial mass and gravitational mass of a body are equivalent.

The ratio of the mass of the proton to the mass of the electron is

If mass of the fissionable material is less than the critical mass, then

The modern atomic mass unit if based on the mass of ………

The ratio of gravitational mass to inertial mass is equal to:

The mass of a unit cell of CsCl corresponds to the combined masses of :