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What is the length of a cubic lose-packed unit cell of an element, in picometers, if the atomic radius is 187.0pm?
A reaction was conducted in benzene as the solvent. Because the reaction was very exothermic, the mixture was cooled in a salt-ice bath. This was a bad choice. Why?
A balloon contains 0.128 mol of gas and has a volume of 2.76L. If an additional 0.073 mol of gas is added to the balloon (at the same temperature and pressure), what will its final volume be.?
A 0.456 gram sample of an unknown monoprotic acid (let's call it HZ) was dissolved in some water . Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
An unknown compound having the molecular formula C3H6O was tested in the laboratory. It was found to be soluble in water; it showed a negative reaction when it was tested with a chromic acid solution.
A 26.1 g sample of pure iron at 77°C is dropped into 93 g of water at 17°C. What is the final temperature of the water-iron mixture.
A certain metal hydroxide, M(OH)2, contains 32.8oxygen by mass. What is the identity of the metal
if 12.5 g of ironiii oxide rust are pro- duced from 8.74 g of iron how much oxygen gas is needed for this
neon has a volume of 445 mL when it is at a pressure of 719 mmHg. What will be the volume when the pressure is increased to 1122 mmHg
If He(g) has an average kinetic energy of 6410 J/mol under certain conditions, what is the root mean square speed of Cl2(g) molecules under the same conditions?
Sulfamic acid (FM 97.094) is a primary standard that can be used to standardize NaOH. What is the molarity of a sodium hydroxide solution if 38.92 mL react with 0.3341 g of sulfamic acid
A 248 mL gas sample has a mass of 0.436 g at a pressure of 753 mm Hg and a temperature of 27 degrees celcius.what is the molar mass of the gas
What is the density of the air in the hot-air balloon and is it less dense or more dense with the density of air at STP
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