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1.
What is the formula mass unit of ZnO?
2.
How many atoms of oxygen are present in 300 grams of CaCO3?
3.
Which of the following represents the correct relation between Avogadro's number (No), number of particles (N) and moles (n)?
4.
Which of the following represents a correct chemical formula?
5.
A change in the physical state can be brought about
6.
The atomic mass of sodium is 23. The number of moles in 46g of sodium is ________.
7.
Molecular mass is defined as the:
8.
The molecular formula of potassium nitrate is ________.
9.
3.42 g of sucrose are dissolved in 18 g of water in a beaker. The numbers of oxygen atoms in the solution are:
10.
An element X is divalent and another element Y is tetravalent. The compound formed by these two elements will be: