A series of waves, with wavelength decreasing from left to right in the center. Above are a series of ovals labeled from left to right radio 10 superscripts 3, microwave 10 superscripts negative 2, TV remote 10 superscripts negative 5, visible 0.5 times 10 superscript negative 6 light bulb, ultraviolet 10 superscript negative 8 suns, X-ray 10 superscript negative 10 nuclear symbols shared with next label, gamma-ray 10 superscripts negative 12. Above that are pictures of the named items and above that Wavelength (meters). Below the waves says About the size of a. . . and below that from left to right and matching up with the wavelength labels, labeled images of a building, human, honey-bee, pinpoint, protozoan, molecule, atom, atomic nucleus. Which electromagnetic wave has the shortest wavelength?

Which electromagnetic wave would have a wavelength approximately the size of the tip of a pencil?

Which electromagnetic wave has the longest wavelength?

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.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.