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A zero-order reaction has a constant rate of 3.40×10-4 . If after 45.0 seconds the concentration has dropped to 3.50×10-2 , what was the initial concentration?
A researcher working on a batch of a ceramic material tested two sets of samples for fracture strength. For one set of samples the specimens were tensile bars with a 10x10x100 mm^3 tensile gauge section
Draw structural formulas for all of the structural isomers of C4H10, C5H12 and C3H7Cl.
a buffer solution is formed by combining 50.0 ml of 0.022 m benzoic acid and 20.0 ml of 0.032 m sodium benzoate
Tuning proton affinity. The pKa of an acid depends part,y on its environment. Predict the effect of each of the following environmental changes on the pKa of a glutamic acid side change.
A.) An MH ion seen in a mass spectrum with composition C10H8N3S+ B.) A fragment seen in a mass spectrum with composition C3H60+ C.) C10SiH15Br2FNPO3
The boiling point of a substance is defined as the temperature at which liquid and vapor coexist in equilibrium. Use the heat of vaporization (30.91kJ/mol) and the entropy of vaporization
The volume of seawater on Earth is about 3.3 x 10^8 mi^3. Because it contains salts, mostly sodium chloride, its density is about 1.03 g/mL, a little higher than that of pure water. The concentration of sodium chloride is about 3.5% by mass.c
Calculate the volume of a balloon at the final temperature if this balloon at temperature of 279K and an initial volume of 2.3L is warmed to 406K.
.56 g of a specific gas are held at 101 degrees Celcius and 800 torr in a volume of 285 mL. Determine the molecular weight of the gas.
A 0.9161 g sample which contained monoprotic lactic acid, was dissolved in 75.0 ml of water and titrated to the equivalence point with 32.25 ml of a 0.1057 m NaOH solution.
what is the molarity of a solution prepared using the given amount of solute and total volume of solution.
How many grams of malonic acid would be needed to make 50.0 milliliters (0.0500 L) of 0.200 M malonic acid?
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