Consider the equations below. 4 equations. 1, Upper C Upper H Subscript 4 Baseline (g) right arrow Upper C (s) + 2 Upper H Subscript 2 Baseline (g) Delta H Subscript 1 Baseline = 74.6 kilojoules. 2, Upper C (s) + 2 Upper C l Subscript 2 Baseline (g) right arrow Upper C Upper Cl Subscript 4 Baseline (g) Delta H Subscript 2 Baseline = negative 95.7 kilojoules. 3, 2 Upper H Subscript 2 Baseline (g) + 2 Upper C l Subscript 2 Baseline (g) right arrow 4 Upper H Upper Cl (g) delta H Subscript 3 Baseline = negative 284.6 kilojoules. 4, Upper C Upper H Subscript 4 Baseline (g) + 4 Upper C l Subscript 2 Baselines (g) right arrow Upper C Upper C l Subscript 4 Baseline (g) + 4 Upper H Upper C L (g) Delta H 4 = negative 205.7 kilojoules.

Complete the following based on the diagram.

Arrow A:

Arrow B:

Arrow C:

Arrow D:

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.