Which best describes ionic compound formulas? they have more positive charges than negative. they have more negative charges than positive. they have an equal number of positive and negative charges. they have an unbalanced chemical formula.

They have an equal number of positive and negative charges.

Explanation: Ionic compounds are compounds that are formed by transfer of electrons. They consists of a metal and a non metal.

Metal loses electron to give and the non metals accept those electrons to give . The oppositely charged ions attract each other and form an ionic bond.

The charges are equal to result into a neutral and stable compound. Thus calcium bearing +2 charge () will combine with 2 chloride ions () to form a neutral and stable ionic compound.

d) center of the mid-ocean ridge

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these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.