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The Carbohydrate content of a glycoprotein is determined to be 12.6, 11.9, 13.0, 12.7, 12.5 g of carbohydrate per 100 g protein in replicate analysis. Find the 50% and 90% confidence intervals for the carbohydrate content t for 50% confidence interval = 0.741 and t for 90% confidence interval = 2.132
What is the pH of a solution that is 0.75 M in sodium acetate and 0.50M in acetic acid? (Ka for acetic acid is 1.85 x 10-5).
Definition for electrophilic, transition state and Markovnik , electrophilic, transition state
A saturated solution of an unknown solid reacted with AgNO3 to give a pale yellow precipitate and also reacted with Pb(NO3)2 to give a white precipitate.
The lattice points in zinc chloride are occupied by molecules while the lattice points in zinc metal are occupied by atoms.
What mass of this substance must evaporate in order to freeze 250 g of water initially at 15 C? (The heat of fusion of water is 334 {J/g}; the specific heat of water is 4.18 {J/g c.K}.)
Europium crystallizes in a body-centered cubic lattice (the Eu atoms occupy only the lattice points).The density of Eu is 5.26 g/cm3. Calculate the unit cell edge length in pm.
Calculate the pH at the equivalence point for the titration of 0.170 M methylamine (CH3NH2) with 0.170 M HCl. The Kb of methylamine is 5.0× 10-4.
Calculate the mass/volume percent [% (m/v)] of 0.278 g of potassium chloride in a 987.8 mL solution.
Determine ΔSsys separately for the volume and temperature changes and show that ΔSsys=0 for a reversible adiabatic process. Also, if the expansion had instead occurred irreversibly against a constant external pressure of 1 atm
How many moles of nitrate ions are present in a sample that contains 4.82 moles of chromium(III) nitrate, Cr(NO3)3
Write a complete reaction mechanizm for this based catalysed transesterification reaction. Rather than starting with a complete oil molecule , given for thereaction between the follwoing ester andmethanol in the presence of NaOH
Acetylene (C2H2) can be produced from the reaction of calcium carbide (CaC2) with water. Draw the localized electron orbital model (hybridized orbital model) for the acetylide anion (C22-), showing and lone pair electron orbital.
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