Cho a gam hỗn hợp X gồm BaO và Al2O3 vào nước, thu được dung dịch Y. Cho dung dịch H2SO4 vào Y, khối lượng kết tủa (m, gam) theo số mol H2SO4 được biểu diễn theo đồ thị sau: Giá trị của a là: A. 40,8. B. 56,1. C. 66,3. D. 51,0.

6. what does the symbol ah stand for? o one calorie given off by a reaction the specific heat of a substance the heat capacity of a substance the heat of reaction for a chemical reaction

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils. the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.