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Calculate the number of moles of solute present in each of the following solutions:
(a) 255 mL of 1.50 M HNO3 (aq),
(b) 50.0 mg of an aqueous solution that is 1.50 m NaCl,
(c) 75.0 g of an aqueous solution that is . 1.50% sucrose (C12H22O11) by mass
The atomic radius of main-group elements generally increases down a group because??
state how much greater the bleach should be to be considered in large excess. if the dye is 1times10-5 m how much can
a certain first-order reaction has a rate constant of 7.50times10-3 at 45 . how many minutes does it take for the
A student performs the following gravimetric analysis of iron ions in a water system:Fe2+ (aq) + 2CO32- (aq) = FeCO3 (s)If this student used excess carbonate and obtained the following data, what was the original concentration in moles/L) of Fe2+ ..
Calculate the pH of the buffer if 2.0 mL of 0.0125 M HCl is added to the buffer prepared in question 3. What is the % change in the pH of the buffer?
Draw the best Lewis structure - Determine the symmetry of the atomic orbitals on the central atom and determine the symmetry of the ligand group orbitals
Given that one mole of NaOH reacts exactly with one mole of potassium hydrogen phthalate, write the chemical reaction and calculate the number of milliliters of .100 M NaOH required to neutralize the .500 gram sample of potassium hydrogen phthalat..
Fluorescence resonance energy transfer (FRET) is a common technique to measure distances between donor (D) and acceptor (A) fluorescent molecules
if a compound has a molar mass of 156 gmol what is its molecular formula?if a compound has a molar mass of 88 gmol what
At 46 C a sample of ammonia gas exerts a pressure of 4.27 atm. what is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature
A graduated cylinder contains 131 mL of water. A 18.0 g piece of iron (density = 7.86 rm{g/cm^3}) and a 25.0 g piece of lead are added.
Very often proteins end up in a solution of high concentration of salts at the end of a purification process. Propose a method to remove these salts.
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