Given the enthalpies of reaction below, determine the enthalpy change for the reaction: n2o (g) + no2 (g) 3no (g). n2 (g) + o2 (g) 2no (g) δh = +180.7 kj 2no (g) + o2 (g) 2no2 (g) δh = -113.1 kj 2n2o (g) 2n2 (g) + o2 (g) δh = -163.2 kj a. 155.6 kj b. 130.6 kj c. 311.3 kj d. 65.3 kj

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

The diagram below shows a cell placed in a solution. a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution. only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it. it will expand as water moves into it. it will shrink as water moves into it.