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A thin layer of gold can be applied to another material by an electrolytic process. The surface area of an object to be gold plated is 49.7cm2 and the density of gold is 19.3g/cm3. A current of 3.25A is applied to a solution that contains gold in the +3 oxidation state.Calculate the time required to deposit an even layer of gold 1.10×10?3
What is the percent recovery of caffeine from tea leaves in the procedure here? Compare the amount of caffeine isolated to the mass of the tea leaves.
Discuss what you would observe after elution and visualization of a TLC plate having made the following mistakes in carrying out the anaylsis.
How many grams of potassium nitrate are required to prepare 0.250 L of a 0.700 M solution?
sample of carbon monoxide gas occupies a volume of 0.225 L. The gas is transferred to a 1.50-L flask and the temperature is reduced to -15 degrees C. What is the pressure of the gas in the flask?
Write the concentration of cations in mEq/L and total the concentration of cations in the solutions. Repeat for anions.
What is the pressure (in atm) exerted by a 2.00 mole sample of gas that occupies 2.50 L at 307.15K? The value of R = 0.0821 L atm mol - 1 K - 1 .
Enzyme labeling can be used to map the structure of the active site of an enzyme using an affinity label, a molecule that is structurally similar to the substrate
If 1.50 g of X reacts with 3.54 g of M to produce 4.22 g of a compound with the formula M4X3, and the atomic mass of M is 48.5 amu.
What's the purpose of acetic acid and sodium acetate in the lab bromination and debromination of cholesterol?
An experiment identical to the one you just preformed is done by another student.except the amperage is continuously increased while the sulfuric acid concentration is kept constant
Calculate the final temperature of 37 mL of ethanol initially at 11 degrees C upon absorption of 624 J of heat. (density of ethanol =0.789 g/mL).
What is the theoretical yield of aluminum oxide if 2.40 of aluminum metal is exposed to 2.10 of oxygen?
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