Which three phenomena occur during a double-slit experiment and support the wave model of light? A. The light passes through the slit
B. Bright areas appear on the screen
C. Light bends around the edges of the slit
D. Dark areas appear on the screen

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-