Chia hỗn hợp A gồm 2 chất hữu cơ no, đơn chức, mạch hở (chứa C, H, O) thành 2 phần bằng nhau. Phần 1 phản ứng vừa đủ với 50 ml dung dịch NaOH 1M, thu được dung dịch B chứa 1 muối và m gam 1 rượu. B có khả năng tham gia phản ứng tráng gương. Đốt cháy hoàn toàn phần 2 thu được 8,8g CO2 và 5,4 g H2O.

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.

Determine the ph of 0.10 m nh3 solution. nh3 is a weak base with a kb equal to 1.8 x 10-5 round answer to nearest whole number.

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.