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During World War II, tritium (3H) was a component of fluorescent watch dials and hands. Assume you have such a watch that was made in January 1944. If 16% or more of the original tritium was needed to read the dial in dark places, until what year could you read the time at night? (For 3H, t1/2 = 12.3 yr.)
Using the same sample of gas ( P1= 695 , T2 = 27 ), we wish to change the pressure to 6950 with no accompanying change in volume or amount of gas. What temperature T2, in Celsius, is needed to reach this pressure
What are the other other concentration units. 1. mass percent 2. mass of H2SO4 in 1 L 3. mass of 1 L 4. mass percent 5. kg H20 6. molality 7. mole fraction H2SO4
The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 75.0m/s , what is its corresponding wavelength
What is the importance of chemistry to agriculture, Write summary of total one page and include references as well.
What volume of chlorine gas is produced when 0.952 mol of hydrochloric acid reacts completely according
A buffer solution is 0.10 M HAc (acetic acid) and 0.10 M NaAc (sodium acetate) and we have 1.000 Liter of it. What is the pH after 0.010 moles of HCl are added to this solution
What is the percent ionization of HA in 0.11 mol/L HA(aq) if HA is a weak acid with pKa=6.00. Enter your answer accurate to three significant figures
At 25 0C the density of a 50 % (by mass) ethanol/water solution is 0.914 g/cc. Given that the partial molar volume of water in the solution is 17.4 cc/mol.
Calculate the pH of a buffer solution formed by adding 28.75 grams of sodium lactate (NaC3H5O3) to 450.0 mL of 0.550 M lactic acid (HC3H5O3) solution
The flow-through fraction in ion exchange chromotography of amino acids in which a cation exchange resin was used is expected to contain mainly
How much heat (in kJ) is required to warm 16.0g of ice, initially at -11.0 C, to steam at 112.0 C? The heat capacity of ice is 2.09 J/g*C and that of steam is 2.01 J/g*C.
a)A 10.0 g sample of a mixture of methane (CH4) and ethane (C2H4) reacts with oxygen at 25C and 1 atm to produce carbon dioxide and water (liquid). If the reaction produces 520 kJ of heat, what is the mass percentage of methane in the mixture?
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