A. A student weighs out 635.94 g Na2CO3 and dissolves it in 2.0 L water. What is the molarity of his solution? (4 points) b. The student's lab manual says to mix some of his Na2CO3 solution with an aqueous solution of copper(II) sulfate (CuSO4). (6 points)

i. What evidence of a chemical reaction would he expect to see? Explain your answer. (2 points)

ii. Write a balanced chemical equation to show the reaction. Use state symbols. (4 points)

c. At very high temperatures, copper(II) sulfate undergoes the reaction CuSO4(s) CuO(s) + SO3(g). (6 points)

i. What kind of reaction is this? (2 points)

ii. If 319.22 g CuSO4(s) reacted completely in the reaction, how many grams of CuO(s) would be produced? (4 points)

Agas occupies 475 cm^3 at 313k. find its volume at 367k. you must show all of your work to receive credit. be sure to identify which of the gas laws you will be using

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

In most resting cells, the concentration of sodium ions is higher outside of cells compared with the intracellular fluid. when cells are stimulated, sodium ion channels open, and sodium diffuses from the outside of the cell to the inside of the cell. sodium ion concentrations in a resting cell are an example of and sodium ion movement in a stimulated cell is an example of in most resting cells, the concentration of sodium ions is higher outside of cells compared with the intracellular fluid. when cells are stimulated, sodium ion channels open, and sodium diffuses from the outside of the cell to the inside of the cell. sodium ion concentrations in a resting cell are an example of and sodium ion movement in a stimulated cell is an example of potential energy; kinetic energy kinetic energy; potential energy the energy of motion; stored energy chemical work; energy stored in chemical bonds