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If you stacked Avogadro's number of pennies one on top of the other on Earth's surface, how far would the stack extend (in km)? [For comparison, the sun is about 150 million km from Earth and the nearest star (Proxima Centauri) is about 40 trillion km from Earth.]
What is the geometry that describes how the electron pairs are arranged about the chlorine atom in ClF3
The activation energy of a certain reaction is 45.4kJ/mol. At 28 degrees celcius, the rate constant is 0.0150s^?1. At what temperature in degrees Celsius would this reaction go twice as fast?
Solution is prepared by mixing 0.025 l of 3e-3 m BaCl2 and 0.025l of 2e-3 m of na2co3. Ksp= 2.6e-9 for baco3. Write balanced equation with correct state
In the event of a severe and prolonged shortage of petroleum, suggest one alternative fuel that could be used for automobiles. What do you see as the advantages and disadvantages of your choice of alternative fuel?
The titration of 0.7910 grams of an unknown weak acid requires 41.5 mL of 0.139 M NaOH in order to reach the equivalence point.
If ΔH = -60.0kJ and ΔS = -0.200kJ/K , the reaction is spontaneous below a certain temperature. Calculate that temperature. Express your answer numerically in kelvins.
determine what amount of heat is required to increase the temperature of sixty grams of ethylene glycol from 15.1
Calcein indicator is added to the solution. The sample then requires 10.00 mL of 0.0120 M EDTA for titration. Calculate for this sample (a) the molarity of the calcium present, (b), the molarity of the magnesium present, and (c) the total hardness..
Identify whether or not solutions of these salts will form an acidic or basic or neutral solutions when added to water.
Calculate the number of fungal particles present in 1 m3 in the original air sample and express your answer in scientific notation, to one significant figure.
(heatcapacity of water : 4.184 j/g/k) if the final temperature of the system is 30c, what is the specific heat capacity of the alloy
Natural lithium is 92.58% lithium-7, with atomic weight 7.016, and 7.42% lithium-6, with atomic weight 6.015. What is the observed atomic weight of lithium as it occurs in nature?
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