What three things happen in order for a chemical reaction to occur?

Which of the following correctly compares UV rays and x-rays? A) X-rays have the same wavelength as UV rays. B) UV rays have the same energy as X-rays. C) X-rays have a higher frequency. D) UV rays have lower energy.

A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy and cannot be separated into oil and water by filtration or centrifuge. What type of mixture is it?

If two balls have the same volume, but ball A has twice as much mass as ball B, which one will have the greater density? If ball C is 3 times the volume of ball D and ball D has 1/3 the mass of ball C, which has the greater density?

A 10.0-L vessel contains gas A at a pressure of 300.0 torr. Gas A is forced into the second 3.00-L vessel. Calculate the resulting pressure in torr. Assume the temperature remains constant

Give two examples each for conduction, convection, and radiation

How much energy must be added to 2 mol H2O (g) to cause it to decompose into H2 and 02? KJ

How many moles are there in 270.4 g sample of NaOH

Suppose a 10.0 L reaction vessel is filled with 0.86 mol of BrOCl and 0.86 mol of BrCl. What can you say about the composition of the mixture in the vessel at equilibrium?

Formula for zinc nitrate

Definition: One of a class of elements having properties intermediate to metals and nonmetals.