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which of the following chemical formulas shows a covalent compound?

nacl

hbr

mgo

co2

Explanation:

A covalent compound is generally formed by non-metals.

For example, in HBr compound both hydrogen and bromine are non-metals. Whereas in compound also both carbon and oxygen atoms are non-metals.

For example, NaCl and MgO are both ionic compounds.

An ionic compound is always formed between a metal and a non-metal.

Thus, we acn conclude that out of the given options HBr and chemical formulas shows a covalent compound.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it