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A solution is prepared by dissolving 307 g of sucrose (C12H22O11) in 684 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
what are the pH and the change in pH after the addition of 0.054 mol hydrochloric acid to the buffer solution?
A 4.10 g nugget of pure gold absorbed 278 J of heat. What was the final temperature of the gold if the initial temperature was 25.0°C? The specific heat of gold is 0.129 J/(g·°C).
given the balanced equation representing a reacction: 2C2H6+7O2=4CO2+6H2O determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6
calculate the concentration of sodium formate that must be present in a 0.10 M solution of formic acid to produce a buffer with a pH of 3.80
How much heat is required to warm 229 g of ice from -47.1°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
How many orbitals are there in a atom with the following combinations of quantum numbers? A). n=3 l=1 B). n=4 l=2 ml=2
The initial rates at various substrate concentrations for an enzyme-catalyzed reaction are as follows.
Determine how many grams of the following solutes would be needed to make 550 mL of a 0.700 M solution.
Select all of the correct statements about reaction quotients and equilibrium constants from the choices below. A reaction quotient equals the equilibrium constant at equilibrium. In a reacting mixture K is the ratio of product to reactant concent..
At 50 degrees Celsius and atmospheric pressure, water is in the liquid phase. What two things could be done to liquid water to change it to a vapor?
Here are some data collected on a sample of cesium exposed to various energies of light. Light energy ({\rm eV}) Electron emitted. Electron KE ({\rm eV}) 3.87 no - 3.88 no - 3.89 yes 0 3.90 yes 0.01 3.91 yes 0.02 Part A What is the threshold frequ..
Which of the following isotopes is more likely to decay via positron emission rather than electron emission.
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