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If 45 g sugar sucrose C12H22O11 is dissolved in .65L H2O, define what is the molality and molarity? As well give the Kf of the solution if the freezing point changed from 0oC to -4.3oCelsius
calcium chloride cacl2 is added to 3.0 l of 0.050 m k2so4 until a precipitate forms. how many grams of cacl2 were
The dioxouranium(vi) cation (urany1,uo2)can be seperated and identified using the procedure described in the experiment. the spot test results for this cation with the with the following test reagents are k4fe(cn)6 red-brown
3.2 x 10-3 moles of O2 gas effuse from a container in 10.0 minutes. How many moles of CH4 gas could effuse from the same container in 10.0 minutes under the same conditions
Calculate the cell potential (emf) for a galvanic cell at 298 K composed of a standard aluminum electrode (Al metal and Al 3+ ions at 1.0 M) and a standard cadmium electrode (Cd metal and Cd 2+ ions at 1.0 M.)
For the following reaction, 6.72 grams of chlorine gas are mixed with excess water. The reaction yields 5.13 grams of hydrochloric acid.
Since most potassium salts and nitrates are soluble in water, PbCrO4 must be the precipitate. The equation for this reaction is: Pb2+ + CrO4 2- -> PbCrO4. Calculate the theoretical yield using the starting quantities of both reactants.
2.00 moles of a gas occupies 62.2 L at a par- ticular temperature and pressure. Its density is 0.900 g/L. What is the molar mass?
oxygen molecules absorb uv radiation of wavelength less than and equal to 242 nm calculate the frequency and energy of the least energitic of these photons.
The 13C nucleus is a spin 1/2 particle, which means it can orient in two directions in a magnetic field (with the field and against it). The difference in energy between the two orientations is given by:
question calculate the energy change in a system in which 56.38 kj of heat is given off at 2.360 atm pressure and the
A sample of gas occupies 250 mL at STP. What is the temperature if the gas expands to 1500 mL at a pressure of 0.500 atm?
Coniine, a toxic substrate solution isolated from poison hemlock, contains only Carbon, Hydrogen, and Nitrogen. combustion analysis of a 5.024g sample yields 13.90mg of CO2 and 6.048mg of H20. what is the empirical formula of Coniine
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