30 ! a friend needs these answers and i don't know what to say. if you don't know the answer, ask somebody who might know, and tell @tracysparkle1 a student heats a 15.0 gram metallic sphere of unknown composition to a temperature of 98°c. the sphere is transferred to a calorimeter containing 100. ml of water at a temperature of 25.0°c. the student observes that the resulting temperture of both the water and the object is 27.1°c after the object is submerged. 1. describe, in terms of the object and the water, the flow of heat energy that took place during the experiment. 2. calculate the amount of heat energy gained by the water in the calorimeter. q = mc∆ 3. using the quantity of heat calculated in the previous question, determine the specific heat of the object.

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

Why is nh3 classified as a polar molecule

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.