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1.How many molecules of NH3 do you have when you have 2.6 moles of NH3 ?
2.How many moles of water do you have when you have 1.12 x 10 26 molecules of water?
3.How many moles of zinc, Zn, do you have when you have 94.6 g of zinc?
The water temperature was 24 degrees Celsius, and the barometric pressure in the laboratory was 30.50 in. Hg. After the student immersed the yeast in the peroxide solution
Use equations to obtain expressions for the following partial derivative for a diatomic ideal gas, assuming that the temp of the system is sufficiently low that only translational and rotational motions are thermally active.
Triethylamine, (ch3ch2)3n, is a liquid that boils at 89C and has a viscosity of about 4 x10^-4 kg/ms. Explain the differences in properties of these two componds.
Nitric oxide, sometimes used in the treatment of lung disease in premature children, is provided to the healthcare professionals as a solution of NO in nitrogen.
What is the molar mass of 35 g of an unknown substance that depresses the freezing point of .350 kg of water .50°C? Kf for water is 1.86C/m.
A mixture of gases conssists of CH4 at a partial pressure of 143 mm Hg, N2 at a partial pressure of 469 mm Hg, and O2 at a partial pressure of 563 mm Hg
the 1H NMR spectrum contains a triplet at 1.08 ppm (3H), a singlet at 2.5 ppm (3H), and a quartet at 2.45 ppm (2h). the magnitudes of the splitting of both the quartet and triplet are identical. deduce the structure of this compound and assign all..
Water has a specific heat of 4.184 J/g x Celsius, weighs 130.00 g, and goes from 25 to 28 degrees Celsius when a metal is placed in the water. The metal weighs 45.00 g, and the temperature changes from 23 to 89 degrees Celsius. Calculate the speci..
A mole of sodium hydroxide has a mass of 40 g. In order to prepare a .1M solution, how many grams of sodium hydroxide must be added to 500 mL of water
The pH difference across the membrane of a glass electrode is 6.45. How much voltage is generated by the pH gradient at:25degreesC and 40 degreesC
Calculate the number of theoretical plates N in the column of length L in 17 cycles. The observed resolution is 1.51.Now, calculate the plate height in the column in ?m.Estimate the resolution in 2 cycles
A sample of neon is collected at 2.7atm and 12.0C.It has a volume of 2.25L. what would be the volume of this gas at STP.
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