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A 65.25 g sample of CuSO4•5H2O (M = 249.7) is dissolved in enough water to make 0.800 L of solution. What volume of this solution must be diluted with water to make 1.00 L of 0.100 M CuSO4?
c2h4g o2g co2g h2oghow many moles of o2 would be required to react with 0.410 moles of c2h4 in the above unbalanced
A box contains 126000 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
A scientist measures the standard enthalpy change for the following reaction to be -1053.4 kJ : 2H2S(g) + 3 O2(g) 2H2O(g) + 2 SO2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of fo..
A large positive overall voltage from redox, metabolic step means: a. the process is very non-spontaneous b. change of G is large and positive
given the unbalanced equation ag2co3 yeild ag o2 co2 how many moles can be produced from 2.5 moles of ag2co3in a
Quinine emits fluorescence at the wavelength of 347 nm. An unknown quinine solution gave fluorescence reading of 400 (after background subtraction) at the 347nm.
A certain atom has a doubly degenerate ground level pair and an upper level of four degenerate states at 450 cm?1 above the ground level. In an atomic beam study of the atoms it was observed that 30 per cent of the atoms were in the upper level
For a solution having 1 x 10-3 equivalents/liter total alkalinity (contributions from HCO3-, CO32- and OH-) at [H+]=4.69 e-11, what is the percentage contribution to the alkalinity from CO32-
I understand that the height of a peak in NMR spectroscopy indicates the number of identical hydrogens in that particular group. But what does it mean when peak height is measured in non-H units lacking a common denominator
At 25 degrees Celsius, .87 atm of No2(g) was allowed to decompose. At equilibrium it was found that the partial pressure of no2(g) was .81 atm. Calculate the value of kc at the temperature
A 0.479 g sample of nitrogen, oxygen or neon gas occupies a volume of 265 mL at 157 kPa and 20?C. What is the molar mass and identity of the gas
Calculate the vapor pressure of a solution containing 25.3g of glycerin C3H8O3 in 125mL of water at 30.0C. The vapor pressure of pure water at this temperature is 31.8torr}. Assume that glycerin is not volatile and dissolves molecularly (i.e., it ..
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