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If the solubility of cholesterol in methanol is 28 g/100 mL boiling methanol and 1g/100 mL of cold methanol, what is the maximum number of grams you could obtain if you recrystallize 28 g of cholesterol from 100 mL of methanol?
The temperature of a 150 gram drinking hlass decreased from 25 to 14 * C as 200 grams of water were added
The molar heat of combustion of methanol (molar mass = 32.0g/mol) is -757kJ/mol. If 2.00 g of methanol is placed in a bomb calorimeter with a heat capacity of 6.50 kJ/degree C what is the temperature rise when the sample is combusted?
The standard cell potential of the zinc-air battery is 1.65V. If at 25 dgrees celsius the partial pressure of oxygen in the air diffusing through its cathode is 0.21 atm.
Is 2-methyl-2-propanamine (C4H11N) a primary amine, secondary amine, tertiary amine, or quaternary ammonium salt? 2) Is N-methyl-2-propanamine a primary amine
Determine the entropy change for heating nitrogen gas from 25 oC to 100oC under the following conditions. Cp =29.1J·K?1 ·mol?1.
A patient needs to take 375 mg of ibuprofen twice daily. The pills in the bottle are each 250. rm mg. How many pills does the patient need to take each time she wants the 375 mg dosage? Assume that these pills are scored and can be cut in half if ..
calculate the osmotic pressure associated with 50.0 g of an enzyme of molecular weight 98,000 g/mole dissolved in 2600 mL
What is the pH of the solution resulting from the addition of 25.0 mL of .01M NaOH solution to 40.0 mL of .01M acetic acid
Can someone give me a step by step solution from the Quantatative chemical analysis text from author Daniel c. Harris(the 8th edition) problem CH4-4-E. It about a confidence level.
Which compund shown with its dipole moment is expected to exhibit the smallest percent ionic character
A frog with the a mass of 4.60 oz can catch 2.0 flies every 3.5secs. if the avg. fly has a mass of 2.5mg how long will it take the frog to increase its mass to .35kg
What is the decay constant for iodine-131? It decays by beta emission with a half-life of 8.04 days.
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