The winner of a 10 km road race took half an hour to complete the race. Calculate her average speed. Give your answer in metres per second.

Calculate the hydronium ion concentration of a solution containing 0.200 mole of acetic acid in 1.00 liter of solution. What is the percent ionization of this acid solution?

Which is a key element found in all carbohydrates, lipids, proteins, and nucleic acids? a. ammonia b. carbon c. nitrogen d. legumes

A scientist is trying to identify an unknown substance. The answer to which of the following questions would give the scientist information about a chemical property of the substance? a. Is it possible to change the shape of the substance? b.

Identify the element that has a ground state electronic configuration of [ar]4s23d104p 6

Electrolysis is the flow of electric current through an electrolyte A. to cause a nonspontaneous acid-base reaction. B. to cause a nonspontaneous redox reaction. C. as a result of a spontaneous acid-base reaction. D.

Polarity of a molecule depends on the polarity of individual bonds in that molecule. a. True b. False

What causes dipole interactions

What do holes in volcanic rock illustrate about the conditions in which

Susan dropped a nail into a graduated cylinder filled with water. She then recorded the number of millimeters the water rose in the cylinder. Which property of the nail can be determined by the change in height of the water?

Por que un solido mantiene su forma?