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A solid substance X has a vapor pressure of 300mm Hg at 25oC and does not conduct electricity. Solid substance Y has an undetectably small vapor pressure at 25oC and is a good electrical conductor. Which of the following statements is consistent with these data?
X is a molecular solid and Y is an ionic solid.X is an ionic solid and Y is a metallic solid.X is a network covalent solid and Y is an ionic solid.X is a molecular solid and Y is a metallic solid.X is a network covalent solid and Y is a metallic solid.
Sodium metal reacts with water to produce hydrogen gas and sodium hydroxide according to the chemical equation shown below. When 0.030 mol of Na is added to 100.00 g of water, the temperature of the resulting solution rises from 25.00°C to 37.90°C
A 135 mL sample of a 15.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.50 L.What is the freezing point of the final solution.
The half life of a first-order reaction was found to be 439 s; what is the time constant for the reaction
You are titrating 50.0ml of a 2.64M benzoic acid solution with a 0.445M potassium hydroxide solution.
Oxygen is more electronegative than nitrogen; fluorine is more electronegative than the other halogens. Fluoride is a stronger field ligand than the other halogens, but ammonia is a stronger field ligand than water. Why
the solubility of O2(g) in water is 4.43 mg O2/100 g H20 at 20 degree Celsius when the gas pressure is maintained at 1 atm. What is the molarity of the saturated solution?
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.100M solution of ammonia, NH3, to prepare a buffer solution that ahs a pH of 8.80?
Given the following two half-reactions, write the overall balanced reaction in the direction in which it is spontaneous and calculate the standard cell potential.
What is the value of the reaction quotient (Qc ) for the reaction below if a 2.75-L flask contains 0.0282 mol NO2(g) and 0.612 mol N2O4(g) at 25°C
Identify the reagents for all three steps. Draw the structures of organic compounds A and B.
calculate the apparent degree of dissociation of the nh4cl if the freezing point of this solution is -15.3oc?molal
Calculate the amount of heat energy in joules required to heat 50.0g of each substance from 25.0 c to 37.0 c
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