Approximately 10000 anti-protons were synthesized and stored in a magnetic containment device at a particle accelerator facility. Due to the containment failure, the amount of antimatter annihilated completely. Calculate the energy that was release ( in Jules) as the result of this nuclear annihilation reaction.
Hint: The annihilation energy can be calculated using Einsten's most famous equation: E=MC2
where E is the energy, is the mass of matter- antimatter in the reaction, and c is the speed of light.
In: Chemistry
In: Chemistry
NH3 is a weak base (Kb = 1.8 × 10–5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.019 M in NH4Cl at 25 °C?
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Consider a solution that is 1.5×10−2 M in Ba2+ and 1.9×10−2 M in Ca2+.
What minimum concentration of Na2SO4 is required to cause the precipitation of the cation that precipitates first?
Minimum Na2SO4 required to cause PPt is 7.1×10−9.
What is the remaining concentration of the cation that precipitates first, when the other cation just begins to precipitate?
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During the dehydration experiment, C2H4(g) and unreacted C2H5OH(g) passed through the tube into the water. The C2H4 was quantitatively collected as a gas, but the unreacted C2H5OH was not. Explain this observation in terms of the intermolecular forces between water and each of the two gases.
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A 200-L home heater tank contains butane gas (C4H10) at 26.0 °C.
When some of the butane
is removed and burned in excess air, the pressure in the tank drops
from 2.34 atm to 1.10 atm.
The energy generated in the combustion is then used to raise the
temperature of 132.5 L of
water from 19.0°C to 71.3 °C.
Useful Information:
ΔH°f (CO2 (g)) = –393.5 kJ/mol ΔH°f (H2O (l)) = –285.8 kJ/mol
Density of water = 1 g/mL
→Calculate the enthalpy of formation (ΔH°f) of butane gas.
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cetylsalicylic acid, a monoprotic weak acid, is the active ingredient in aspirin. Two aspirin tablets, each containing 500.0 mg of acetylsalicylic acid, are dissolved in 25.0 mL water. a. Calculate the pH of the solution. b. Calculate the percent ionization of acetylsalicylic acid in the solution. (2 pts)
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The following reaction can occur when a match is struck:
KClO3(s) + 3 P4(s) ------- > 3 P4O10(s) + 10 KCl(s)
(a) How many grams of KCl(s) can be produced from 38.56 milligrams of P4 assuming that we have a sufficient amount of KClO3 present?
(b) In a separate experiment, how many molecules of P4O10(s) can be obtained from 0.00625 moles of KClO3? Assume we have a sufficient amount of P4.
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In many cancer cell lines, PDH kinase (PDK) activity is increased. The result of this regulation is that pyruvate is directed towards a pathway other than the TCA cycle. Once again, using your excellent research skills, explain the reason cancer cells might direct pyruvate to an alterative pathway and what advantage this might provide to cancer cells
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A) Carbonic acd, H2CO3, can be found in a wide variety of body fluids (from dissolved CO2). Calculate the hydronium ion concentration of 6.38 x 10 ^-4 M, H2CO3 solution. What is the concentration of CO3 ^2-? Ka (H2CO3)= 4.3 x 10 ^-7 Ka (HCO3)= 4.8 x 10 ^-4
B) Calculate the base-ionizatoin constant for SO4 ^2- and PO4 ^3-. Ka (HSO4)= 1.1 x 10 ^-2 Ka (PO4^2-)= 4.8 x 10 -13
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For silicone rubber clearly states the possibility or impossibility of each process and includes the pros and cons for each possible for mold process.
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For a reaction with ΔH∘=−24 kcal/mol and ΔS∘=0.07 kcalmol−1K−1, calculate the equilibrium constant at: (1.) 30 ∘C and (2.) 150 ∘C.
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For the following reaction KClO3---->KCl+1/2 O2 assign oxidation states to each element on each side of the equation...reactants and products. Which element is oxidized? Which element is reduced?
Reactants for K, Cl, and O please.
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An undisturbed core of soil at field capacity was taken from a field site had a wet weight of 420 g. The following information was measured in the lab. The oven dry wt of the soil = 345 g Bulk Density = 1.15 g/cm3 What is the moisture content of the soil on a volume basis (volumetric water content Theta v)
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