Which is an example of a chemical change?

A) mixing of poster colors

B) formation of clouds

C) metal corroding in salt water

D) sugar dissolving in water

E) separating salt from seawater

It is found when an unknown solid solute is dissolved in water that the solubility of the solid increases if temperature is increased. What can be determined about the entropy and enthalpy of the dissolution of this unknown solid?

What is the dissociation equation for magnesium nitride?

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Each period in the periodic table corresponds to an energy sublevel or the principle energy level?

An unknown quantity of gas is held at a temperature of 295 K in a container with a volume of 25 L and a pressure of 742 kPa. How many moles of gas are in the container?

What kind of changes occur between atoms when substances undergo chemical reactions?

What is the most stable part of the periodic table of elements

2. A solution of potassium cyanide, KCN, is made by dissolving 3.2 g of KCN in water. When this solution reacts with excess hydrochloric acid, HCl, it produces 0.30 g of poisonous hydrogen cyanide gas, HCN.

Which is correct for kinetic particle theory. (It can be all correct or 2 of them correct) A. In a solid, the particles are close together B. All particles move at a constant speed C. The higher temperature, the faster the particles move

At what temperature will 6.21 g of oxygen gas exert a pressure of 5.00 atm in a 10.0-L container?