1. why is it necessary to balance chemical equations?
i need this is due in 10 minutes

Which compound contain an iron with a 3+ charge

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

Use the half-reactions of the reaction au(oh)3 + hi -> au +i2 +h2o to answer the questions