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what is the molarity of phosphoric acid in a solution that is 84% by mass phosphoric acid and has a density of 1.87 g/ml?
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.15×1014 {rm s^{-1}} when it is exposed to visible light of wavelength 4.76×10-7 {rm m}.
What is the gas pressure (in atm) inside a 2.43-L bulb that contains 2.88-g of Ne at a temperature of 32.9 C?
In an equilibrium mixture the partial pressures of SO2 and O2 are 0.165 atm and 0.755 atm, respectively. What is the equilibrium partial pressure of SO3 in the mixture?
Calculate the mass percent of a solution that is prepared by adding 61.4 g of rm NaOH to 413 g of {rm H_2O}.
one mole of silicon si has a mass of 28.086 g, and one mole of carbon has a mass of 12.011 g. what is the mass of one mole of silicon carbide ?
A proton in a linear accelerator has a de Broglie wavelength of 143 pm. What is the speed of the proton?
Predict the rate of change in the concentration of N2O over this time interval. In other words, what is dt [N2O]/ dt?
Draw both extended and Fischer representation of each of these compounds.
How much energy (in kilojoules) is required to convert 225 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 g/mL?
Which of the following statements is true regarding chiral carbons with R configuration? a. plane polarized light is rotated clockwise b. plane polarized light is rotated counterclockwise
A piston has an external pressure of 11.0 bar . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.570 liters.
Aluminum has a specific heat of 0.880 J/g-deg. How many joules are needed to heat 155g of Al from 20.0oC to 75.0oC
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