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please answer 17,18 & 19????
Question 17 (1 point) What mass of Ba contains the same number of atoms as 3.0 g Li? 0.15 g 3.0 g 59 8 290 g Question 18 (1 p
T-shaped bent trigonal-pyramidal Question 19 (1 point) Which of the following molecules or ions will have a Lewis (electron-d
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