Write chemical formula of galena

Write chemical formula of ore of zinc

Write the chemical formula of gypsum. How is it converted into plaster of Paris ?

Write the chemical formula of plaster of paris. Why should it not be left exposed to air?

What is meant by the term chemical formula ? Write the chemical formula of calcium oxide. Calculate its formula unit mass. ("Atomic mass of Ca"=40u, O=16u) .

Write the chemical formula of ammonium chloride. Explain why an aueous solution of ammonium chloirde is acidic in nature? Illustrate your answer with the help of a chemical equation.

Chemical Formulas

Write the chemical formula of cryolite

Write the chemical formula of chlorophyll a.