Which equation is balanced?

Mg+O2→2MgO

2Na+F2→2NaF

2Al+3O2→Al2O3

2Al+F2→2AlF3

2Na + F2 → 2NaF

Explanation:

A balanced equation is an equation in which the number of the individual atoms on the left side is the same with that on the right side of the equation. This is true as explained by the law of conservation of matter.

From the options above only the equation given below is balanced :

2Na + F2 → 2NaF

There are 2 atoms of Na both on the left and on the right. There are also 2 atoms of F both on the left and right side

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

hurricanes form in warm water