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Problem- A sample of rainwater is observed to have a pH of 7.4. If only atmospheric CO2 at 380 ppm and limestone dust are present in the atmosphere to alter the pH from a neutral value, and if each raindrop has a volume of 0.02 cm^3, what mass of calcium is present in each raindrop?
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You dissolve the sample in .550 mL of water and determine that the osmotic pressure of the resulting solution is .107 torr at 35 deg C (760 torr = 1.00 atm). What is the molar mass of the compound?
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a pigment suspected of being contaminated with arsenic is treated to convert any arsenic present into a solution of
Calculate the potential of a zinc electrode immersed in 0.0100M in Zn(NH3)4 2+ and 0.25M in NH3 B4 for Zn(NH3)4 2+ is 7.76*10^8
If you want to dope GaAs to make an p-type semiconductor with an element to replace As, Which element would you pick? A) Si B)Se C)N D)S E)P
Question- Iodine 131 is a radioactive isotope. After 2.00 days, 84.2% of a sample of 131-I remains. What is the half-life of 131-I
Concentrated hydrochloric acid, HCl, has a composition of 37.5 %. The solutes molar mass is 36.461 g/mol. You may assume the molar mass of water is 18.015g/mol.
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A clinic took temperature readings of 250 flu patients over a weekend as well as discovered the temperature distribution to be Gaussian, with a mean of 101.40°F as well as a standard deviation of 0.5340. Explain use this normal error curve area ta..
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