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Throughout the weighing of their unknown for this experiment a student inadvertently contaminated their sample with a few grains of sand (SiO2), recorded the weight of the of the contaminated sample, as well as proceeded with the experiment.
Would that student's computed molecular weight be too high, too low or would this type of contamination lead to no error in the final result? the sand wouldn't dissolve in water, and hence would just lie on top of the resin column as well as lead to no ion exchange results.
Draw the lewis structures for NO2Cl and NO3Cl include lone pairs of electrons, resonance structures, and formal charges (minimized)
What volume of hydrogen can be produced at 22.0C and 1.01atm pressure by the reaction of 25.0ml of 2M HCL with 0.3g Zn?
If the final temperature was the same for both processes, what is the difference between for the two-step process and for the one-step process in joules
Calculate the activation energy of this reaction in kJ/mol At what temperature would the half-life be 12.0 min?
Calculate the minimum concentration of Cr3+ that must be added to 0.095 M NaF in order to initiate a precipitate of chromium(III) fluoride. (For CrF3, Ksp = 6.6 x10^-11.)
the complex ion [Cr(CN)6]4- and draw out its d-orbital energy level diagram CN- is strongly interacting ligand. The wavelength of maximum absorption in the absorption spectrum of the complex ion is 320nm. Compute the d-orbitials splitting Δo, in k..
At 25°C, the vapor pressure of pure benzene is 100.84 torr. Explain what is the vapor pressure of a solution made from dissolving 12.3 g of biphenyl in 31.8 g of benzene
The acid dissociaton constant Ka, for nitrous acd is 4.4x10^-4, what is the basicity constant Kb for the conjugaed base, nitrite, NO2-? HNO2+H20 H3O+ +NO2-
A 0.3459 g tablet that contains bicarbonate generates 1.24 x 10?3 moles of CO2. What is the percent bicarbonate in the tablet? Bicarbonate is 61.0138 g/mol.
What minimum voltage is required to electrolyze anhydrous HF? Hint: the H-F bond is so polar that liquid HF is essentially composed of H+ and F- ions.
a) How many pi bonds are in a molecule of N2. b)What is the hybridization of the NItrogen
1. what are the average calories not calories per gram for each of your food items?2. use the nutritional information
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