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Calculate the mass percent of a solution that is prepared by adding 32.2 g of NaOH to 262 g of H2O.
Compute the amount of heat essential to fully sublime ninety grams of solid dry ice (CO 2 ) at its temperature of sublimation if it is given that the heat of sublimation for CO 2 = 32.3 kj/mol express your answers in kilojoules?
Compute the changes in the degree of polymerisation and the rate of the polymerisation caused by raising the temperature of polymerisation of styrene in C6H6, initiated by azobisisobutyronitrile from 60 0C to 70 0C.
A 35.0ml sample gas is enclosed is in a gas tight syringe at 22 degress celcius. If the syringe is immersed in an ice bath a 0 degress celcius, what is the new gas volume.
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
Recommend an explanation why the cyclic intermediate might have two important groups in a trans relationship that could factor the E-alkene.
How many mL of a 0.10 m solution of NaOH are needed to completely react with 120 mL of a 0.15 m solution of H2CO3.
What is the pH of a propanoic acid - propanoate buffer that is 0.25M in CH3CH2COONa and 0.15M with respect to CH3CH2COOH.
A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide, mica (which is quartz or SiO2), and iodine.
I am trying to understand the effects of leachate from landfills and its effects on groundwater, and since I am in environmental health- its effects on the human health.
Why is lip gloss long lasting containing petroleum? How many metric tonnes of 5%-S coal would be required to yield the H2SO4 needed to produce a 2.0-cm rainfall of pH 2.00 over an area of 100 square kilometers?
Calculate the enthalpy change for the dissolution of NH 4 NO 3 and expree your answer in units of kJ/mol.
magnesium sulphate MgSO4 has an observed osmotic pressure =7.6 atm at the temperature of twenty five degree celsius. Determine the observed van't Hoff factor?
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