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50 grams of sodium chloride to 500 grams of water, what will the freezing points be of the resulting solution? kf(H2O)=1.86 C/m
A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH3. What is the percent yield for this reaction? Reaction: N2(g) + 3 H2(g) ? 2 NH3(g)
A Power plant is the main point source of SO2 emissions for a 25 km2 area. Estimate the steady-state concentration of SO2 for this area from this point source given the following temperature data. Windspeed= 5km/hr.
A meteorological balloon of radius 1.0M at sea level and 20 degrees C. At it's maximum altitude the radius of the balloon is 3.0M and the temperature is -20 degrees C
What is the the mole fraction of a solution prepared by dissolving 0.315 g of cholesterol
Consider the following specific heats: copper, 0.384 J/g·?C; lead, 0.159 J/g·?C; water, 4.18J/g·?C; glass, 0.502J/g·?C. If the same amount of heat is added to identical masses of each of these substance
Diethyl ether C4H10O(l), a flammable compound that has long been used as a surgical anesthetic has a structure
Calculate the resulting pH if 400 mL of 0.50M HCl is mixed with 300 mL of 0.080 M NaOH.
What is the recommended daily allowance (RDA) of calcium, in mg, assuming a 2000 calorie diet for a 25 year old adult? A student carries out part 1 of this experiment and finds the equation for his/her calibration curve to be
The vapor pressure of pure ethyl bromide at this temperature is 400.0 torr. Assuming an ideal solution, what is the molecular mass of the compound?
4 KO2 + 2 H2O + 4 CO2 4 KHCO3 + 3 O2 1.86 moles of O2 were produced.Now, How many molecules of O2 does this number of moles represent.
a bomb clorimeter contains 2.5 liters of water if the combustion of .175 moles causes the temperature of the water to rise 45 degrees celsius, what is the molar heat of combustion.
How many moles of KMnO4 are present in 25.0 mL of a 0.0900 M solution?
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