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Calculate the expected change in temperature for 4.5 g of NH4NO3 dissolved in 100.0 mL of H2O. Assume that the calorimeter absorbs no heat.
Generation and use of a standard curve and serial dilutions, This lab provided a 100mM Glucose standard solution which you are required to dilute with water to give final concentrations of 0,0.4,0.8,1.2,1.6 and 2.0 mmol/L glucose in a final volume..
1g soil has been spiked with 0.1ml of 100 ppm (v/v) trimethylbenzene and subsequently extracted with 250 mL pentane. The extract is then measured with GC-FID.
Explain the steriochemisty of gyceraldehyde and glycerol, give reasons for absence of anomeric forms in sucrose
Determine the solubility of N2 in water exposed to air at 25 C if the atmospheric pressure is 1.2 atm. Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 10-4 M/at..
if molarity of a 2000ml solution is 4.0M NaCl, how many moles of NaCl are dissolved in that solution.
The density of germanium is 5.325 g/cm3. If you made a 5.3-nm diameter quantum dot of germanium, how many Ge atoms would it contain? Assume the dot is spherical.
Chemical analysis of the two compounds reveals that 0.25 mol ACl 2 has a mass of 100.0 g and 0.50 mol BCl 2 has a mass of 125.0 g. Determine what are the molar masses of ACl 2 and BCl 2 ?
Suppose you have a sample of sodium weighing 11.42 g. How many atoms of sodium are present in the sample.
In photography, solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 × 10-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.00 L of 0.238 M Na2S2O3.
Molecular weight and mole concept explained in this solution, The molecular weight of NaOH is 40. the molecular weight of a widely used buffer, HEPES, is 255
how many moles of gas are there in a 45.0 l container at 25.0 degress celcius and 500.0 mm hg
Imidazole, acting as a nucleophile, catalyzes the hydrolysis of phenyl acetate by attach on the carbonyl carbon atom of the ester. The imidazole displaces the phenoxide anion and forms acetyl imidazole
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