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What is the pressure in atmospheres of 25.0g of NH3 gas in a 3.00L container at 25.0oC ?
How much heat is released by 100.0 mL of a dilute solution of NH4NO3 as it changes its temperature from 22.4C to 19.1C when it is being prepared?
write a program to compute the diameter in centimeters of a steel rod an aluminum rod and a copper rod which can
When aqueous solutions of lead( II) ion are treated with potassium chromate solution, a bright yellow precipitate of lead( II) chromate, PbCrO4, forms
Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm^3. A fitting composed of common brass has a total volume of 127.0 cm^3. How many atoms of copper does the fitting contain
What is the pH of this buffer solution? (Neglect the volume change that occurs with addition of solid sodium nitrite) b.) Calculate the pH when 2.00 mL of 0.0275 M NaOH are added to 50.0 mL of buffer solution.
What is the molar concentration of an aqueous solution whose total volume is 150.0 mL if the solution contains 0.3512 mol of NaOH
use the appropriate relationships from the chapter of electrons in Atoms to determine the wavelength of the line in the emission spectrum of He+ produced by an electron transition from n=5 to n=2
Write the chemical equations representing the first, second, and third acid dissociations. 100mL 0.050 M phosphoric acid is titrated with 0.10 M NaOH. Calculate the pH of the solution after 25mL of NaOH have been added.
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 2+ in aqueous NaCN. You can assume sodium is a secator ion and does not need
esters are normally unreactive toward sodium borohydride but they react readily with lithium aluminum hydride to
The specific heats of ice and water are 2.09 and 4.184 J/g.°C, respectively. The heat of fusion for water is 334 J/g.
when 2.45 g of an unknown weak acid ha with a molar mass of 85.0 gmol is dissolved in 250.0 g of water the freezing
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