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What weight of potassium formate should be added to make 900 mL of a pH 4.00 buffer solution that is 0.20 M in formic acid?
0.05 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?
420 g of butane reacts with 1510 g of oxygen to produce 1390 g of carbon dioxide and 652 g of water.What is wrong with this description?
What volume of 0.1M NaOH is required to fully neutralize 20 mL of 0.1M acetic acid? of 50 mL of 0.04M Phosphoric acid
Does ammonium chloride added to water produce a simple solution, does the ammounium chloride dissociate or does a chemical reaction occur resulting in a new set of compounds.
The student did not pre-heat the gravity filtration apparatus in Part 3. c) The student forgot to cool 5 mL of solvent in Part 5 and washed the crystals with room-temperature solvent.
The elemental mass percent composition of malonic acid is 34.63% C, 3.87% H, and 61.50% O. Determine the empirical formula of malonic acid. Express your answer as a chemical formula.
A 10.9-g mixture of nitrogen and carbon dioxide is found to occupy a volume of 8.88 L when measured at 641.9 mmHg and 28.5oC. What is the mole fraction of nitrogen in this mixture?
compare the stabilities of each of the four conjugate bases that would be formed from the doprotonation of the four different OH groups and determine which of hte OH is most acidic.
A red laser pointer emits light with a wavelength of 650 nm. What is the energy (in J) of a photon of light of this wavelength?
Calculate [CO32- ] in a 0.025 M solution of CO2 in water (H2CO3). If all the CO32- in this solution comes from the reaction shown below, what percentage of the H+ ions in the solution is a result of the dissociation of HCO3‾?
Tween-20 is a detergent that is often used in immunological assays. Concentrated Tween-20 a viscous liquid and is difficult to accurately pipette in small amounts. Because of thism it is common to make a 10% stock of Tween 20 i nwater and use this..
In the experiment aniline and acetic anhydride are reacted to form acetanilide, how do you calculate the theoretical yield of acetanilide?
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