Cho 7,2 gam hỗn hợp gồm Cu và Zn tác dụng với dung dịch HCl du, khi phản ứng xảy ra hoàn toàn thấy thoát ra 2,24 lít khí H2 (đktc). Khối lượng muối khan thu được là: (cho Cu= 64; Zn=65; Cl=35,5)

Why is the vapor pressure of a warm lake higher than the vapor pressure of a cold lake? o a. warm water has a greater heat of vaporization. ob. warm water evaporates more quickly. cool water evaporates more quickly. od. cool water has a greater heat of vaporization.

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)