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Explain why the mass of the crucible and anhydrous salt is less than the mass of the crucible and the hydrate.
What is the chemical formula of copper (II) sulfate?
calculate the vapor pressure lowering of water when 5.67 g of glucose c6h12o6 is dissolved in 25.2 g of water at 25
The oxygen radical reacts with other substances such as oxygen molecules to produce other secondary pollutant such as Ozone.
If 7.75 L of radon gas is at 1.55 atm and -19 degrees Celcius, what is the volume at STP
Use the van der Waals equation of state to calculate the pressure of 3.10 mol of CO2 at 469 K in a 4.90-L vessel. Use the ideal gas equation to calculate the pressure under the same conditions.
in a 100 ml sample of buffer solution made of propanoic acid concentration .35m and sodium propanoate concentration
The question is that Iron can be determined spectrophotometrically after reaction with a ligand that results in a highly colored complex. In one determination, iron is reduced with hydroquinone to ensure it is all in Fe2+ oxidation state.
calculate the maximum mass in grams of h2s that can form when 155 g aluminum sulfide reacts with excess water according
The combustion of 45.0 g of methane (natural gas) releases 2498 kJ of heat energy. How much energy in kilocalories kcal would combustion of 0.670oz of methane release.
An Arrhenius plot (ln k vs. 1/T) for a second order reaction produced a straight line with a slope of -6.81e+03 K. What is the value of the Arrhenius pre-exponential if k = 3310 M-1 s-1 at 640 K
Sodium sulfide (11.7 g) reacts with hydrochloric acid (16.7 ml, 12.0 M) to yield sodium chloride and hydrogen sulfide.
A chemist needs a buffer with a pH of 4.35. How many mLs of pure acetic acid (density=1.049 g/mL) must be added to 465 mL of 0.0941 M NaOH solution to obtain such a buffer
Write the time-independent Schrodinger equations for (a) an electron moving in one direction about a stationary proton and subjected to a Coulombic potential, (b) a free particle, (c) a particle subjected to a constant, uniform force.
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