A tightly sealed 5.0-l flask contains 781 mm hg of ar at 19 °c. the flask is heated until the pressure is doubled. what is the temperature of the gas?

What is a heterogeneous mixture

Which is not a possible clue that a chemical change has occurred? A. The color changes. B. The substance melts.

Iodine has 53 protons and 74 neutrons: what is the atomic number? What is the atomic mass?

The number of atoms in 12.0 grams of C-12 IS

Which statement is true of phenolphthalein? a. It can be used in combustion reactions. b. It is colorless in the presence of an acid and pink in the presence of a base. c. It gives you the exact pH of a solution. d.

You found that your wet product contains 0.362 moles of ammonium magnesium phosphate hexahydrate. How many grams of phosphorus does your wet product contain

How many electrons, protons, and neutrons does copper have?

A chemist prepares a solution of aluminum sulfite by measuring out 109 umol of aluminum sulfite into a 350 mL volumetric flask and filling the flask to the mark with water.

How many Na + ions are in 3.0 moles of Na2O?

Does a reaction stop once it has reached equilibrium? Explain