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The Ideal Gas Law

Q. Calculate the density (in g/L) of Freon-12 , CF2Cl2 , at 31.3 Celsius and 0.937 atm.

Solved • May 4, 2020

Naming Ionic Compounds

Q. 2.6) Determine which of the following chemical formulas may represent a real compound. a) CaCl b) Ca3(CO3)2 c) (CH3COO)2Ca·2 H2O d) CH3COOCa

Solved • May 4, 2020

Physical & Chemical Changes

Q. 2.4) An example of a change where the chemical composition of a substance is not changed would be a) oxidation b) burning c) rusting d) melting

Solved • May 4, 2020

Isotopes

Q. Calculate the average atomic mass of antimony.

Solved • May 4, 2020

Ionic and Covalent Bonds

Q. For the bonds in these molecules: CaO H2 LiF SO2 ClF Which two bonds have the same ionic character?

Solved • May 4, 2020

Significant Figures

Q. Carry out these operations as if they were calculations of experimental results, and express each answer in the correct units and with the correct number of significant figures: (a) 7.1243 m + 0.2 m + 2.45 m = (b) 3.63 g- 2.2653 g = (c) 4.71 cm x 3.2595 cm = (d) (2x10^3 g + 8.013 g)/(0.057 cm^3 - 0.013 cm^3) =

Solved • May 4, 2020

Wavelength and Frequency

Q. A particular form of electromagnetic radiation has a frequency of 5.31 ×10^11 Hz. What is the wavelength in nanometers? In meters? Enter your answers in scientific notation. To what region of the electromagnetic spectrum would you assign it?

Solved • May 4, 2020