Very important!

How do enzymes catalyze chemical reactions?

By giving up electrons

By positioning substrates and destabilizing bonds

By acting as substrates and forming new products

By being used up in the reaction

How many moles of ethyl alcohol, C2H6O, are in a 21.0g sample

Which factor causes a decrease in the rate of dissolution? decreasing the amount of solute increasing the stirring of the solution decreasing the surface area of the solute increasing the temperature of the solvent

A solution is made by dissolving 14.0 g of potassium chloride to a final volume of 78.9 mL solution. what is the weight/weight % or the percent by mass of the solute? (use 1.00 g/mL for the density of water)

An imaginary gas that perfectly obeys all gas laws is called a (n) ___. a) ionic gas b) perfect gas c) ideal gas d) inert gas

A (n) pyramid is a model which represents levels.

A saline solution contains 1.6 % NaCl by mass. How much NaCl is present in 57.2 g of this solution?

During a laboratory experiment you discover that an enzyme-catalyzed reaction has a delta G of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the delta G for the new reaction

What is the molarity of a hydrochloric acid solution prepared by diluting 200.0 ml of 0.500m hcl to a total volume of 1.00 l?

How does a metallic bond differ from an ionic bond

Give two examples of chemical energy being transformed into electrical energy