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Which of the following pairs of ions is expected to form a precipitate in aqueous solution? Select one: O a. Cd?/S O b. Cat/BT Oco/NO: O d. Mn? / SO- O e NHS/CO2 Which of the following substances are assigned the correct number of valence electrons? nitride ion = 3 Select one: a magnesium ion 0: O bcalcium = 0 O caluminium ion = 0; proton = +1 chloride ion = 8 d. sodium ion=1 fluoride ion-1 Oe, rubidium ion - 0: phosphide ion = 0 How many lone pairs of electrons does a molecule of dinitrogen difluoride have? Select one: 2.8 @ 6.4 Q & 10 08.12
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