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Plutonium, 244/94 PU, is a radioactive nuclide. When one of these atoms decays, a series of alpha and beta particle emissions occurs until the lead isotope, 208/82 Pb, is produced. Effectively ______ alpha particles and ______ beta particles are emitted per plutonium atom.
a. 6 and 6b. 12 and 8c. 18 and 9d. 9 and 6e. 3 and 3
How many different signals are expected for this molecule? That is, how many magnetically different hydrogens are present in the molecule? This is in general determinted by differences in bonding, and distance to an electronegative group.
Large beds of rocks are used in solar-heated homes to store heat. Assume that the specific heat of rocks is 0.82J/g-K. a. Calculate the quanituty of heat absorbed by 50.0kg of rocks if their temperature increases by 12.0 C. b. What temperature cha..
How many liters of CO2 are produced when 15 liters of O2 are consumed
What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.154 M in sodium chloride and 0.030 M in magnesium sulfate? Assume complete dissociation for electrolytes.
When aluminum metal is dipped in an aqueous solution of hydrochloric acid, hydrogen gas is produced with the formation of an aluminum chloride solution. Write the balanced chemical equation showing the phase of reactants and products.
Calculate the enthalpy of vaporization of Br2. This element has vapor pressures of 271 mm Hg and 565 mm Hg at 30.0 °C and 50.0 °C, respectively.
Show the calculation for the moles of benzaldehyde, the moles of acetone, the theoretical yield of dibenzalacetone in grams, and the calculation for the % yield of the product (dibenzalacetone). Also indicate which reagent is the limiting reagent.
In nature, the element X consists of two naturally occurring isotopes. 107X with abundance 52.84% and isotopic mass 106.9051 amu and 109X with isotopic mass 108.9048 amu. Use the given information to calculate the atomic mass of the element X to a..
A 4.9 M magnesium chloride solution needs to be created. What is the least amount of grams of magnesium chloride that I can use to create this solution.
Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 gas is 8.60 L at 899 torr and 28°C.
C2H4+3O2= 2CO+2H2O if 2.70 mol C2H4 is reacted with 6.30 mol O2 a. identify the limiting reagent
Calculate the heat of formation of Magnesium oxide (MgO). Data given are: Mg(s) +2HCl (aq) ......> MgCl2 (aq) + H2 (g) ?H = 462 kJ/mol MgO(s) + 2HCl (aq) .......> MgCl2 (aq) + H2O (l) ?H = -146.0kJ/mol H2 (g) + 1/2O2 (g) .........> MgO (aq) ?H = -..
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