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15 D Câu hỏi 25 Calculate the atomic mass of element "X", if it has 2 naturally occurring isotopes with the following masses and natural abundances: 44.82 amu 47.056 amu X-45 5 diem 77.7% X-47 (not given) (Hint: The percentages of the two isotopes must add up to 100%. The answer must be exact to the nearest hundredth.) Instructions: 1. Enter only a numerical value. Do not enter the unit. For example, 19.31 amu should be entered as "19.31", 2. Round off your answer to the nearest hundredth (0.01). For example, 19.344 amu should be entered as "19.34". Do not include the unit. 3. If your answer is something like 40.00 or 40.10, know that Canvas Quiz will not let you type in 40.00 or 40.10. It will automatically change it to 40 and 40.1, respectively. But don't worry, Canvas Quiz will count 40 to be the same as 40.00. It will count 40.1 to be the same as 40.10.