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Question- 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?
Please answer only if you are 100% confident
How much heat is required to warm 231 g of ice from -45.1°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C
What percentage of the 131I released by the explosion would have remained by that time? Use the first order kinetic equation: [A] = [A]o e-kt
the rate of the constants for the above gas pharse reaction is 1.438M^-2 s^-1 at exactly 642.5 Kelvin and 21.64 M^-1 s^-1 at exactly 838.1 Kelvin. What is the value of the activation energy of the reaction in KJ/mole?
Calculate the minimum wavelength of light (in nm) that could break an oxygen-oxygen double bond given that it takes 499 kJ to break on mole of these bonds.
What molecules are used and why are they colored. and how does the different composition depend on the specific ink color also, how do different components absorb different wavelengths of light in the ink
If a second-period diatomic molecule has 13 electrons in its valence shell (total of 2s and 2p electrons), what is the predicted bond order of the molecule
Suppose that you had a sample containing 75% by weight Potassium Chlorate and 25.0% inert nonvolatile material. What weight loss should you observe after intense heating, if the original sample weighed 1.100 g
when 50.0 grams of silicon dioxide is heated with an excess of carbon 32.2 grams carbonide along with carbon monoxide.
Calculate the predicted change in boiling point, in °C for your solution. What is the calculated boiling point of the solution? Compare this with the actual boiling point.
question 1 how much naoh would you need to dissolve in water in order to prepare 1.50 l of a naoh solution in which
Consider the peaks for pentafluorobenzene (12.98min) and benzene(13.20min) in the chromatogram shown above. The elution timefor the unretained solute is 1.06 minutes. The open tubularcolumn is 30.0m in length and 0.530mm in diameter, with a layer ..
A solution of .25 mol HF diluted to 1.0 L has a hydronium ion concentration of 1.3x10^-2 M. What is the percent ionization of HF
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