Phản ứng phân hủy phenol: C6H5OH  sản phẩm, cho biết R = 8.314 J. mol-1.K-1. a. Xác định mức độ giảm năng lượng hoạt hóa khi sử dụng xúc tác biết ở 20 oC, 30 oC và không có xúc tác k20oC = 1.2, k30oC = 2 (đơn vị k), khi có xúc tác k20oC = 1.5 (đơn vị

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

What can be found in the ionosphere

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign