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A spherical cannonball made of an iron alloy has a density of 7.86 g cm-3, and weighs 22.12 pounds. On the other hand, spent uranium (from processing which removes the commercially important rare isotope) has a density of 19.05 g cm-3. What would be the diameter, in cm, of a uranium round shot which has exactly twice the weight as the iron ball described above? 1 pound = 0.4536 kg.
A 2.00-g sample of white solid was vaporized in a 345-mL vessel. If the vapor has a pressure of 985 mmHg at 158°C, what is the molecular mass of the solid?
Calculate the mass of calcium carbonate formed when 25 mL of a solution of calcium chloride at 0.10 M react with sodium carbonate in excess
Multiple choice questions in Radioactive Decay - electron emitted from the nucleus during some kinds of radioactive decay is known
A gas is compressed from initial volume of 5.60L to 1.23L by an external pressure of 1.00atm. During the compression the gas releases 128J of hear. What is the internal energy of the gas?
Show the orbital-filling diagram for N (nitrogen). Stack the subshells in order of energy, with the lowest-energy subshell at the bottom and the highest-energy subshell at the top.
In the following experiment, the water in the glass is stirred by slowly lowering a weight (m=3kg) through a series of pulleys. If the 3kg weight is lowered 10m, the stirrer spins, but eventually all of the kinetic energy of the stirrer is turned ..
Methane has a Henry's Law constant (k)of 9.88 × 10-2 mol/(L·atm) when dissolved in benzene at 25°C. How many grams of CH4 will dissolve in 3.00 L of benzene if the partial pressure of CH4 is 1.48 atm?
Description of amino acids, Chiral compounds occur when a carbon atom has four different things bonded to it. All but the simplest amino acids (glycine) are chiral because the alpha carbon has an amine group
What are the differences between sub-energy levels and orbitals? (My professor said they were different.)
how many milligrams of hydrazoic acid ( ka= 1.9x10^-5) must be in a 5.0-L solution that has a pH of 4.90?
what is the enthalpy change when 40.1 mL of 0.400 M sulfuric acid reacts with 19.5 mL of 0.133 M potassium hydroxide? H2SO4(aq)+2KOH(aq)->K2SO4(aq)+2H2O(L)
A sample of ammonia gas was allowed to come to equilibrium at 400 K.2NH3(g) ↔ N2(g) + 3H2(g) At equilibrium, it was found that the concentration of H2 was 0.0584 M, the concentration of N2 was 0.0195 M, and the concentration of NH3 was 0.430 M.
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