Identifying compounds caffeine is the most widely used psychoactive drug in the world and is found in coffee beans, tea leaves, cola nuts, and other plant products. for many plant species, caffeine serves as a natural pesticide, protecting the plant from insect damage. in our bodies, caffeine affects the rate at which brain cells fire to one another. the chemical formula for caffeine is c₈h₁₀n₄o₂. which of the following terms correctly describe caffeine? check all that apply. element isotope matter compound

Does the temperature affect the solubility of sugar and salt in water? if it does tell me like different temperatures with different solubilities so i can sketch down a graph

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.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.