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The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.
What are the differences between atoms and molecules?
How many atoms are in the human body?
What is atoms and molecules in chemistry?
What is the mass of –
(a) 1 mole of nitrogen atoms?
Write the chemical formula of the following.a) Magnesium chloride(b) Calcium oxide(c) Copper nitrate