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Calculate the radius of an iridium atom, given that Ir has an FCC crystal structure, a density of 22.4 g/cm3, and an atomic weight of 192.2 g/mol.
An aqueous solution contains 12.7% NaCl by mass. What mass of water (in grams)is contained in 2.5L of the vapor above this solution at 55 celcius? the vaor pressure of pure water at 55 celcius is 118 torr.
Calorimeters and heat capacity, If 2.500 g of Mg is burned in a constant volume calorimeter with a heat capacity of 1.10 kJ/degrees Celsius containing 1.500 L
The use of phenols such as tert-butylcatechol as free-radical scavengers is based on the fact that phenolic hydrogens are readily abstracted by radicals
From the same container under the same conditions--same temperature and initial pressure, it takes 385 s for 7.00 L of O2 gas to effuse. Calculate the molar mass (in grams/mol) of the unknown gas.
A solution is 21.0% ethylene glycol (C2H6O2) solution in water with density of 1.02g/mL. WHat is the molarity?
The rate constant of a reaction is 7.4 x 10^-3 s-1 at 25 Celsius, and the activation energy is 33.6 kJ/mol. What is k at 75 Celsius?
Mixture where particles remain in semipermeable membrane, Particles of this mixture remain inside a semipermeable membrane. What is it Solution, colloid or suspension?
Calculate: a.the rate constant b.the half-life at 500 C c.how long will it take to decompose 65% of the drug?
account for each of the following properties of solids: the definite volume, the relatively high density of solids, the extremely low rate of diffusion.
calculate w and ?U when 1 mole of xenon gas assumed ideal under goes adiabatic expansion from 27?c to 127? assuming(heat capacity of constant volmue=12.5)
a 12.09-g sample of solid sodium bicarbonate completely decomposes into solid sodium hydroxide and carbon dioxide gas when heated.
130 mL of an HCl solution with pH of 3.90 is added to 200 mL of an HNO3 solution. The resulting solution is 1.40 mL. What was the pH of the original HNO3 solution?
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