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(1) Why should protein samples be kept at cold temperatures.
(2) Metabolic acidosis:What are the causes, symptoms, and prevention?
student performed two melting-point determination on a crystalline compound. in one determination the capillary tube contained a sample about 1-2 mm in hight and the melting range was found to be 141-142C
A flask contains a mixture of hydrogen and oxygen. The pressure exerted by these gases is 785 mmHg. If the partial pressure of the hydrogen in the mixture is 395 mmHg, what is the partial pressure of the oxygen?
Compute the first order rate constant for the reaction. Compute the time required for 95 percent of the phosphine to decompose.
calculate the volume of a chromium atom in microliters if the volume of a single chromium atomcr 8.10e-24 cm3.
Make a rough sketch showing how the following properties of a baseball depend on time, from the moment it is hit high into left field to the time it is caught by the outfielder. You may neglect the effects of friction!
Explain what is the molar concentration of the final NaOH solution at 25°C
Tincture of iodine is I2 dissolved in ethanol, C2H5OH. A 1% solution of tincture of iodine is 10.0g of solute for 1000. g of solution. How many grams of solvent are present in 1000. g of this solution? How many moles of solute are in 10.0g of I2? ..
What is the purpose of telomeres in cells? And how does this relate to progeria syndrome?
A buffer is created by combining 140.0mL of 0.25 M HCHO2 with 70.0ml of 0.20M NaOH. Explain what is the pH?
Problem- What is the proton concenteration in a solution of 102.7 mM acetic acid (this concentration represents the sum of both the acetic acid and the deprotonated acetate) at pH 5.77 if the pKa of acetic acid is 4.76? Report your answer in micro..
Given the following two half-reactions, write the overall balanced reaction in the direction in which it is spontaneous and calculate the standard cell potential.
for a particular redox reaction MnO2 is oxidized to MnO4- and Ag+ is reduced to Ag write a balanced equation
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