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Explain is the mass percent of a solution if 42.9 grams of aspirin is dissolved into 175mL of ethanol? Density of ethanol is 0.789 g/mL
What is the concentration of Ethanol (CH3CO2H) in (PPM)m that is 1 microgram ethanol per liter of water
Rex Ryan mixed peroxide with yeast to generate oxygen gas and collected the gas in a graduated cylinder, using the same set up as was used in Experiment 11. He collected the following data
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.080 M in NH4Cl
Write ionic equations that illustrate how each pair of compounds can serve as a buffer pair. Do not include physical states and use the smallest possible integer coefficients.
What amount of HCl gas must be added to 1.00 L of a buffer solution that contains [acetic acid] =2.0 M and [acetate]=1.0 M in order to produce a solution with pH =4.24
a sample of H2O with a mass of 46.0 grams has a temperature of -58.0 C. how many joules of energy are necessary to heat the steam from 100.0 degrees Celcius to 114.0 degrees celcius if the specific heat of steam 2.01J/g degrees celcius.
Assume the radius of a neutron to be approximately 1.0; times ;10^{ - 13} {rm cm}, and calculate the density of a neutron. [Hint: For a sphere V = (4/3)pi r^3.]
What is the electron configuration of the atom in the third row of the periodic table that has the smallest ionization energy?
Presume that your 100-mL tea solution contained 0.30 g of caffeine. If you had extracted with only one 15-mL portion of dichloromethane, Explain how much caffeine would have been left in the water solution
At 1 atm, how much energy (kJ) is required to heat 65.0 g of H2O(s) at -20.0 degrees C to H2O(g) at 135.0 degrees C?
If the reaction of 0.650 g of rhodium(III) sulfate with excess sodium hydroxide produces 0.320 g of rhodium(III) hydroxide, what is the percent yield
determine how many kgs of ca are there in a 205-pound man if 1.4 percent of the mass of a human body is calciumca?an
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