7. Which of the following observations do not indicate that zinc reacted with the copper II chloride solution? (Place letter in the blank)
a. Copper precipitated out of solution.
b. Washing the copper with water and acid
c. The solution changed color from blue to a greenish color
d. The zinc lost mass after sitting in the copper chloride solution

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explanation:

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?