Which of the following gases are typically used for colorful lighting when an electric current is applied?

A) hydrogen and helium

B) argon and krypton

C) fluorine and chlorine

D) oxygen and nitrogen

If a solution A has twice as much solute as solution B. Is it possible for the solutions to have the same concentration?

A mixture of two compounds, a and b, was separated by extraction. after the compounds were dried, their masses were found to be: 105 mg of compound a and 91 mg of compound b. both compounds were recrystallized and weighed again.

Write the Ka expression for an aqueous solution of hydrofluoric acid: (Note that either the numerator or denominator may contain more than one chemical species.

A solid reactant is placed into a beaker of warm water. The liquid vigorously bubbles as the soild dissolves into the solution. What will most likely happen if the temperature of the liquid is slightly reduced

What is the name of the compound CrPO4 • 5H2O?

Which choice is an example of an endothermic process? . conversion of steam to ice . conversion of steam to water . conversion of water to ice . conversion of ice to steam

Cobalt chloride hexahydrate has a formula weight of 237.9 g/mol. how much would you use to make 0.5 liter of a 0.3 m solution?

Describe what happens when you take a antacid

According to Table F, which compound is soluble in water? (1) barium phosphate (3) silver iodide (2) calcium sulfate (4) sodium perchlorate

The temperature of a liquid is 75k what is the temperature im celsius