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What does assessment look like in the science classroom and why is it important?
Differentiate between diamond and graphite. How is combustion different from pyrolysis?
How much perspiration is evaporated per gram of glucose metabolized? Assume the heat of vaporization of perspiration (H2O) is 40.6 MJ/kgmole.
Calculate the pH of a solution that results from mixing 19.5 mL of 0.145 M HCN(aq) with 22.1 mL of 0.108 M NaCN. The Ka value for HCN is 4.9 x 10-10.
Write down the electron configurations for C2 and F2. What is the bond order for each? Which one is likely to have larger bond dissociation energy.
What is the pOH of a solution that is prepared by mixing 25.0 mL of 0.200 M HNO3 and 25.0 mL of 0.150 M KOH
A chemist wants to make 6.0L of a .350M CaCl_2 solution. What mass of CaCl_2 should the chemist use?
A 25.0 mL sample of 0.1 M acetic acid is titrated with 0.125 M NaOH. Calculate the pH at 25 degrees C of the titration mixture after 10.0, 20.0, and 30.0 mL of the base have been added.
The stopcock connecting a 2.25 L bulb containing oxygen gas at a pressure of 4.00 atm, and a 5.25 L bulb containing neon gas at a pressure of 8.00 atm, is opened and the gases are allowed to mix.
A 25.00 mL sample of a .1028 M monoprotic weak acid solution has a pH of 3.48 after the addition of 12.45 mL of .1106M NaOH. What is the pka of this weak acid
If photons of green light (wavelength=530 nm) are used to locate the position of the basketball (thrown with a velocity of 30 m/s) with precision of one wavelength of the green light, what would be minimum spread in the speed of the baseball?
tetrafluorethylene c2f4 effuses at rate of 4.6x10-6 moles per hour. unknown gas effuses at rate of 6.5x10-6 moles per
From the 1HNMR spectrum of dibenzalacetone can you assume which geometric isomer(s) is (are) formed
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