The directions for a laboratory activity call for 50 ml of solution A. A student accidentally takes 55ml from the stock bottle. What should the student do with the extra 5 ml of solution A? a-Return the extra 5ml to the stock bottle and replace the cap.
b-pour the extra 5 ml down the drain and rinse the sink with cold water
c-dilute the extra 5 ml with 100 ml of water and pour it down the drain
d-set the extra 5 ml aside in a labeled beaker and ask the teacher for advice

In English: Airplanes are pressurized to ensure that there is enough oxygen in the air we are breathing when we are at such great heights. This is why when you are on a flight, you (hopefully) don't pass out. Rather, the worst you get is your ears popping. Maybe a headache.  

Google Translate Indonesian translation: Pesawat terbang diberi tekanan untuk memastikan bahwa ada cukup oksigen di udara yang kita hirup ketika kita berada di ketinggian yang luar biasa. Inilah sebabnya mengapa ketika Anda sedang dalam penerbangan, Anda (semoga) tidak pingsan. Sebaliknya, hal terburuk yang Anda dapatkan adalah telinga Anda muncul. Mungkin sakit kepala. Saya taruh ini di Google Translate jadi saya harap Anda bisa mengerti.