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Tritium (symbol T) is produced in the upper atmosphere by neutron cosmic rays primarily through the 14N(n,T)12C and 16O(n,T)14N reactions. Tritium has a half-life of 12.3 years and decays by emitting a beta-particle with a maximum energy of 18.6 keV. Tritium exists in nature almost exclusively as HTO. and in the continental surface waters and the human body it has an atomic T:H ratio of 3.3 x 10^-18. Since the human body is about 10% hydrogen by weight, estimate the tritium activity (Bq) in a 100-kg person.
For the synthesis of ammonia given below, calculate the free energy change, delta G, from the elements under standard conditions at 25 degrees celcius. N2 (g) + H2(g) -> NH3(g)
The bp of the solution was 104.3C when 40 g was dissolved in 150mL of water. I lose points if I am more than 5% off. Any ideas what the actual substance might have been? Keep in mind this is a college gen chem lab.
Draw the Lewis structures of the following compounds and find out number of electron groups, number of lone-pairs, geometry of electron
Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH = 10.10 [CH3NH2]/[CH3NH3CL] = ? I know that the answer is 0.34 but is not wright to write it in this way in mastering chemistry and they are errors in the submission
If water had not been added to your initial product, what error in the percentage magnesium determined would have resulted(that is if the part of the product has been magnesium nitride)? Explain.
What is the heat of reaction (kJ) per mole of acid? Assume the mixture has a specific heat capacity of 4.18 J/(g·K) and that the densities of the reactant solutions are both 1.00 g/mL.
If 25.0g of sodium peroxide(Na2O2, MW = 78.0g/mol) is reacted with 12.1g of water (H2O, MW = 18.0 g/mol) according to the following thermochemical equation: What quantity of heat is released?
How many moles of NaOH must be added to 0.550 L of 0.191 mol/L HC3H5O2(aq) to obtain a solution with pH=4.7? Assume the temperature is 25oC. (For HC3H5O2, pKa=4.89 at 25oC).
Calculate the molality and molarity of an NH3 solution made up of 28.5 g of NH3 in 70.0 g of water. The density of the solution is 0.982 g/mL.
The pKa of acetic acid, HC2H3O2, is 4.76. A buffer solution was made using an unspecified amount of acetic acid and 0.30 mol of NaC2H3O2 in enough water to make 1.50 L of solution. Its pH was measured as 4.50 on a meter.
What is the activation energy for a reaction whose rate is tripled by a temperature increase from 22.5°C to 58.0°C?
A particular brand of gasoline has a density of 0.737 rm g/mL at 25 C. How many grams of this gasoline would fill a 15.1 gal tank?
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