Weather balloon at earths surface
A weather balloon at Earth's surface has a volume of 4 L at 285 K and 791 mmHg. If the balloon is released and the volume reaches 4.19 L at 711 mmHg, what is the temperature?
Expected delivery within 24 Hours
The enzymes used in this experiment are only a partially purified pyruvate kinase preparation. This is because complete purification would strip away co-factors and co-enzymes that are necessary for enzyme activities.
A solution is made by mixing 500 mL of .167 M NaOH with 500 mL of .1 M CH3COOH. Calculate the equalibrium concentrations of H+. CH3COOH, CH3COO-, OH- and Na+.
A chemist is commissioned to produce 50,000 liters of 0.550 M aqueous phosphoric acid. The chemist can purchase solid, 98.64% pure, phosphoric acid to dissolve in water. How many grams of this reagent are required?
For each of the following three questions 25.0 mL of 0.100 M pyridine (Kb = 1.70 x 10-9) is titrated with 0.100 M HCl. For each question calculate the pH of the final solution after the indicated amount of HCl has been added.
What is the molar mass of a nonpolar molecular compound if 5.52 grams dissolved in 36.0 grams of benzene begins to freeze at -1.87oC? The freezing point of pure benzene is 5.50 oC and the freezing point depression constant, Kfp, is -5.12oC/m."
Sugar (82.00 grams; molar mass 342.3 g/mol) was dissolved in water. The freezing point of the solution was determined to be -3.60 deg C. How many grams of water were used to make the solution? The freezing point depression constant Kf for water is
If copper has a photoelectric threshold wavelength of 279 nm, calculate the velocity (m/s) of the electron emitted when copper is illuminated with light with a frequency of 2.33 × 1015 Hz.
What is the molarity of a solution that contains 35.0 g of vitamin B1 hydrochloride (molar mass = 337 g/mol ) in 110 g of solution?
1958526
Questions Asked
3,689
Active Tutors
1449174
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
A nurse is preparing to increase the dosage of nitroglycerin by 5 mcg. The nurse should set the IV pump to deliver how many mL/hr?
Question: Where might you find information about how to summon emergency help whilst on duty? Select all that apply
Question: What is the main assessment indicator of a sudden cardiac arrest in a non-responsive adult victim?
What are the signs of cardiorespiratory arrest? Select 4 options, then Submit. Unresponsive to stimuli Abnormal or no breathing
You are working in a simulated childcare centre, Little.ly Learning Centre, which is currently updating its policies in response to recent health and safety
Explain how you think others would evaluate your driving habits? How would you describe your driving habits?
The new benefit you propose must be something new and innovative. (The benefit should not be something already commonly offered as a benefit