When the actual gas volume is greater than the volume predicted by the ideal gas law, the explanation lies in the fact that the ideal gas law does NOT include a factor for molecular.

When the equation for the reaction represented below is balanced and all coefficients are reduced to the lowest whole-number terms, the coefficient for O2(g) is …C3H8(g) + …O2(g) → …H2O(g) + …CO2(g)

Which of the following has molecules with a pyramidal shape?

Excess Na2SO4 is added to a 42.53 mL sample of Ba(NO3)2. What is the formula of the precipitate? If 3.046 g of precipitate was formed, what was the molarity of the Ba(NO3)2?

On the basis of strength of intermolecular forces, which of the following elements would be expected to have the highest melting point?

Which of the following behaves most like an ideal gas at the conditions indicated?

A 40.0 mL sample of 0.25 M KOH is added to 60.0 mL of 0.15 M Ba(OH)2. What is the molar concentration of OH-(aq) in the resulting solution? (Assume that the volumes are additive.) 

N2 molecules absorb ultraviolet light but not visible light. I2 molecules absorb both visible and ultraviolet light. Which of the following statements explains the observations?

The diagrams below represent solutes present in two different dilute aqueous solutions before they were mixed. Water molecules are not shown. When the solutions were combined, a precipitation reaction took place. Which of the diagrams below is the best particle representation of the mixture after the precipitation reaction occurred?   The figure presents two diagrams, labeled “Diagram 1” and “Diagram 2.” Both diagrams contain six randomly arranged circles. In diagram 1, there are 3 larger circles labeled C l with a negative one charge and 3 smaller circles labeled N a with a positive one charge. In diagram 2, there are 3 larger circles labeled N O 3 with a negative one charge and 3 smaller circles labeled A g with a positive one charge.

Using the wavelength information provided in the table, what is the color of the light with photon energy of 3.3 ✕ 10-19 J? ColorWavelengthRed647 – 760 nmOrange585 – 647 nmYellow575 – 585 nmGreen491 -575 nmBlue424 – 491 nmViolet300 – 424 nm