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Consider the reaction of phosphorus and nitric acid. Determine how the oxidation number of phosphorus changes during this reaction. The phosphorus compound formed is phosphoric acid.
a. goes from +3 to +5
b. goes from 0 to -5
c. goes from 0 to +7
d. goes from +5 to +7
e. goes from 0 to +5
Consider the reaction: 2 A + B + 2452 J --- 2C at 25 celcius. The entropy change dor the reaction is 10.0 J/k. At what temperature would you expect it to be spontaneous
the volume of a sample of oxygen gas collected over water is 258 mL at 27 degrees C and 620.0 torr. Calculate the volume in milliliters of dry oxygen gas at STP. (the vapor pressure of water at 27 degrees C is 26.7 torr.)
Determine the change in Ssys for the process if specific heat capacity for ethanol = 2.42 J/g K. express your answer in units of J/K
an aqueous solution is prepared by diluting 3.30mL acetone, CH3COH3, (d= 0.789g/mL) with water to a final volumeof 75.0 mL. The density of the solution is 0.993 g/mL. what are the molarity and the molality of acetone in this solution?
What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m
What is the mass in grams of 2.50 x 10^12 lead (Pb) atoms. Enter your answer in scientific notation.
Identify the type of interactions involved in each of the following processes taking place during the dissolution of sodium chloride (NaCl) in water.
Why are masses in the chemistry laboratory usually determined by a difference method(using a beaker to contain the object to be weighed rather than just placing the object directly on the pan of the balance
Construct a table that shows the relationship among the group number, valence electrons lost or gained and the formula metallic
which molecule will undergo only London dipersion forces when interacting with other molecules of the same kind?
A certain gaseous oxide of sulfur has an effusion rate that is 0.707 times the effusion rate of oxygen gas
calculate the molarity of a solution made by dissolving 0.850 grams of na2so4 in enough water to form exactly 930 ml of
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