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Unit Cell

Q. Perovskite, a mineral containing calcium, oxygen, and titanium, crystallizes in the following cubic unit cell. (Figure 1) What is the formula of perovskite? Express or answer as a chemical formula.

Solved • Nov 25, 2019

Hybridization

Q. Specify the hybridization of each carbon atom.

Solved • Nov 27, 2019

Gas Stoichiometry

Q. 2 KClO3 (s) → 2 KCl (s) + 3 O2 (g). If 245.1 grams of KClO3 reacts completely in a container that is at constant pressure of 1.00 atm and constant temperature of 273 Celsius, what volume of gas in liters is produced? (The molar mass of KClO3 is 122.55 g/mol) 44.8 L 67.2 L 89.6 L 112 L 134 L

Solved • Nov 27, 2019

Electroplating

Q. How many seconds does it take to deposit 41.8 g of Zn on a steel gate when 21.0 A is passed through a ZnSO4 solution?

Solved • Nov 20, 2019

Entropy

Q. Compute the standard entropy change of the sublimation of iodine at 298K. I2(s) ΔH =0 and ΔG =0 I2(g) ΔH=62.44 and ΔG =19.36

Solved • Nov 27, 2019

Electroplating

Q. Electrolysis of molten NaCl is a Downs cell is the major isolation step in the production of sodium metal. Assuming that 212 g of Na metal forms, answer the following questions. (c) How many amps will produce this amount in 9.50 h?

Solved • Nov 20, 2019

Electroplating

Q. Electrolysis of molten NaCl is a Downs cell is the major isolation step in the production of sodium metal. Assuming that 212 g of Na metal forms, answer the following questions. (b) How many coulombs are required? Enter your answer in scientific notations.

Solved • Nov 20, 2019