Ethiopian University Entrance Examination chemistry 2007 - 2013 E.C answer with explanation

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Part 2 please 🙏🏾🙏🏾🙏🏾

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when you round the given number it said put in 3sf but you did as an ambiguity, how? why????????????? please answer

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OK thank you, please see this video to understand how to determine number of significant figure ruclips.net/video/pUKUMqaFvAc/видео.html

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11 lmn A alihonem teacherye? Gilits alihonelignm please

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34,495 has 5 significant figure, the question said that, , round to third significant figure? the third significant figure is 4 . therefore next to 4 the number is 9 which is greater than 5 . so, 34,495 round to 34,500

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Number 1 endet new nitrogen fixation mihonew nitrification bacteria adelem ende algebagn teacher pls tell me😥

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The key difference between nitrogen fixation and nitrification is that the nitrogen fixation is the process of converting atmospheric nitrogen gas into ammonium ions, nitrites, and nitrates, but the nitrification is the process of converting nitrogen compounds like ammonium ions into nitrite or nitrate ions.

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25 incorrect