Write the net ionic equation for each of the following sets of reactants. a. Ba(OH)2(aq) + HNO3(aq)

b. (NH4)2CO3(aq) + CaCl2(aq)

c. Na2S(aq) + ZnCl2(aq)

d. KCl(aq) + NaNO3(aq)

Which statement about the stamps is correct?

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

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol