% by mass of O in H2O - 88.9%, % by mass of O in Ca(NO3)2 - 58.5%, % by mass of Li in lithium oxide - 46.7%, % by mass of N in ammonium iodide - 9.7%, % by mass of O in calcium hydroxide - 43.2%, % by mass of Na in Na2CO3 - 43.4%,

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