Atoms and Molecules
Trending Questions
Q.
Define one mole of a substance?
Q.
Isotopes of the same element have
different atomic numbers
same mass number
same atomic mass
different mass numbers
Q. In a chemical reaction, the total mass of the reactants is 50 g. What will be the total mass of the products formed?
- 40 g
- 100 g
- 50 g
- 25 g
Q.
The word Atom is derived from Greek word - 'Atomos' which means
Tiny
Smallest
Divisible
Non - divisible
Q. The chemical properties and atomic masses of oxygen and carbon are different. This can be explained using the postulates of:
- Avogadro's law
- Dalton's atomic theory
- law of constant proportion
- law of conservation of mass
Q.
What is the mass of sulphur that would react with 5 g of iron to form ferrous sulphide (FeS)?
3.2 g
5.7 g
2.85 g
5.9 g