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A water sample was found to contain [Ca2+]=35 mg/L and [Mg2+]=20 mg/L. Determine the water hardness in terms of mg/L CaCO3.and state whether it has low, medium or high hardness.
Explain in detail why these bacteria don't begin to excrete this metabolite before using up the phenylalanine in the medium.
What is the theoretical mass of xenon tetrafluoride that should form when 130 g of xenon is reacted with 100 g of F2? What is the percent yield if only 145 g of XeF4 is actually isolated?
Calculate the solubility of zinc hydroxide, Zn(OH)2, in 1.00 M NaOH. Ksp = 3.0 × 10-16 for Zn(OH)2, Kf = 3.0 × 1015 for Zn(OH)42-
the water-cyclohexanone-diethyl ether mixture. Explain how the addition of sodium chloride aids in isolation of the cyclohexanone product.
if 100% of the NaCl molecules dissociated, the van't Hoff factor i=2 calculate the experimental van't Hoff factor of NaCl from your data. I dissolved 30 g of salt into 100ml of water
A Buffer solution with a pH reading of 8.50 was prepared by mixing 0.25 mole acid(HA) and 0.05 mole NaOH in 500.0ml DI water.
What is the silver ion concentration in a solution prepared by mixing 373 mL of 0.366 M silver nitrate with 383 mL of 0.563 M sodium chromate?
when companies sell compressed gas in steel cylinders, they usually quote the contents as volume of gas at 1 atm pressure at tempertaure of 20 degrees celcius.
Calculate the molar mass of a vapor that has a density of 6.735 g/L at 13°C and 825 torr.
A mixture containing 2.37 g each of CH4(g), C2H4(g) and C4H10(g) is contained in a 1.50 L flask at a temperature of 45°C.
The concentration of glucose inside a cell is 0.14mM. outside the cell the concentration of glucose is 12.8 mM. Calculate the change in Gibbs free energy for the transport of 5.00 moles of glucose
What is the theoretical yield(in grams) of aspirin ,C9H8O4, when 2.00g of salicylic acid,C7H6O3, is reacted with4.00g of acetic anhydride
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