Hòa tan 19,35 gam hỗn hợp Zn và Mg bằng b (ml) dung dịch HCl nồng độ 2,5M thu được 12,32 lít khí H2 (đktc) 1, Viết PTHH của các phản ứng xảy ra
2, Tính phần trăm khối lượng mỗi kim loại trong hỗn hợp đầu
3, Xác định giá trị của b

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Draw two cyclic constitutional isomers of cis-1