Fe2+ and Sn2+; Fe3+ and Sn2+; Fe2+ and MnO4; Fe3+ and MnO4; Fe2+ and Cr2O7 2-; Fe3+ and Cr2O7 2-. Which ions will coexist in solutions? Indicate the equations.

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

Which metals are called noble metals

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.