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Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 (femtometers) and the radius of the atom is approximately 70 (picometers). Calculate the volume of the nucleus and the volume of the atom. (Assume two significant figures.)
What is the purpose of a hot filtration in a recrystallization. When would a hot filtration step not be necessary or useful in a purification by recrystallization? What experimental observation of the hot solution would let you know that it was no..
What is the percent yield of a reaction in which 260. g phosphorus trichloride reacts with excess water to form aqueous phosphorus acid (H3PO3) and 127 g HCl?
An unknown gas is placed in a 1.500L bulb at a pressure of 356mm Hg and a temperature of 22.5C, and is found to weigh 0.9847g. What is the molecular mass of the gas
A syringe filled with air can be used to test the relationship between the temperature and the volume of a sample of gas. The syringe has a movable plunger that allows an enclosed sample of gas to be held at a constant external pressure, so the ga..
To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. A chemical engineer places a mixture of noble gases consisting
What is the pH of a solution resulting from the titration of 50 mL of 0.050 M acetic acid solution, CH3COOH, with 50 mL of 0.050 M NaOH solution
1.find the ph of a 0.65 m solution of propionic acid. what is the fraction ionized at equilibrium?2. what is the
How much heat (in ) is required to warm 10.0g of ice, initially at -11.0(degrees C), to steam at 113.0(degrees C)? The heat capacity of ice is 2.09(J/g* degrees C) and that of steam is 2.01(J/g*degrees C) .
A gas at constant temperature occupies a volume of 4.59 L and exerts a pressure of 895 torr. What volume (in L) will the gas occupy at a pressure of 642 torr
a sample of riboflavin has a molar absorptivity of 1.67 x 10^3 L(mol x cm). What is the concentration of a solution with an absorbance of 0.484? The pathlength is 1.00cm.
How many moles of Ammonia gas can be produced from reacting 4.5 Moles of Nitrogen gas
Predict the major organic product of the reaction between N-propylacetamide and sodium benzoate upon heating at 140 degrees Celsius. Select one: N-propylbenzamide propyl benzoate phenyl propanoate acetic benzoic anhydride sodium acetate no reactio..
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