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A recipe for onion to serve 30 people needs 4.2 pounds of onions. Arrange the dinner party for 18 people. Explain how many pounds of onions require making onion soup for the 18 guests?
Cyanogen is a gas which contains 46.2 % C and 53.8 % N by mass. At a temperature of 25oC and a pressure of 750 mmHg, 1.50 g of cyanogen occupies 0.714 L.
What is the osmotic pressure of a solution prepared by dissolving 4.00 g of CaCl2 in enough water to make 540. mL of solution at 28.5°C?
Our quality control department is being moved to a different location and will not be able to handle any projects for a few weeks.
consider an excited-state hydrogen atom. What is the energy of the electron in the n = 3 level? ground state energy
A solution is initially 0.050M in acetate, CH3COO- (Kb = 5.6 x 10^-10). 10.0mL of 0.10 M HCl is added. Write a chemical equation for the neutralization reaction that occurs.
Find the standard enthalpy of formation of ethylene, C2H4(g), given the following data: heat of combustion of C2H4(g) = -1411 kJ/mol; ?H°f[CO2(g)] = -393.5 kJ/mol; ?H°f[H2O(l)] = -285.8 kJ/mol.
Precisely 14.3 mL of water at 30.0 degrees Celsius are additional to a hot iron skillet. All of the water is rehabilitated into steam at 100 degrees Celsius. The mass of the pan is 1.25 kg also the molar heat capacity of iron is 25.19 J/(mol*degre..
-an experiment was done using NaCl and KCl for solubilty purposes, would the results be different if Nacl and LiCl were used instead?
The temp rises to 17.9 degrees celsius. Neglecting heat capacity of container, what is the specific heat of the metal? The specific heat of H2O(l) is 4.18 J/(g*degree Celsius)
wo aliquots of serum are added to 5.00 mL portions of water. To one portion is added 20.0 microL of 0.0750 M KCl solution. The net emission signals in arbitrary units are 23.2 and 68.6, What is the magnitude of the emission signal produced by the s..
What is the total pressure in a 11.0 L flask 20.0°C, which contains 0.127 moles of H2 and 0.288 moles of N2
preparing semicarbazone derivatives, what is the purpose of adding sodium acetate to semicarbazide hydrochloride?
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