The ionization energy for a hydrogen atom is 1.31*106 J/mol. What is the ionization energy for He+?

You want to remove as much CO2 gas as possible from a water solution. Which of the following treatments would? a. cool the solution b. filter the solution c. boil the solution d. aerate the solution

A sample of carbon dioxide gas at 398.15 K and 248 torr occupies a volume of 275 mL. What will be temperature needed to increase the volume to 0.321 L while pressure remains constant?

During a lab experiment, students are supposed to add small pieces of magnesium, aluminum, and calcium metal to concentrated hydrochloric acid in a test tube.

Which statement best describes a mole? It is used mainly for writing chemical formulas. It is used for chemical equations that have reversible reactions. It is used for directly comparing the amounts of substances.

What is the percent composition of chromium in BaCrO4

As transformações estão presente em nosso cotidiano, elas nunca param de acontecer, na sua maioria invisível a olho nu. Quais critérios é preciso observar para identificar se ocorreu transformação?

U human ear is measured in?

Is the earth older than any of the rock layers.

Problem page liquid hexane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water. what is the theoretical yield of water formed from the reaction of of hexane and of oxygen gas?

Calculate the mass percent of a NaCl solution in which 140g of NaCl is dissolved in 4.50L of water at 25C (density = 0.997g/mL).