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How much energy in joules is lost or gained when one mole of 90Y with a mass of 89.907152 amu undergoes beta decay to produce 90Zr with a mass of 89.904703 amu? (Mass of an electron = 0.00054858 amu) **90 is the mass number
1.710 × 1014 J
2.204 × 1011 J
1.710 × 1011 J
5.701 × 102 J
A solution is made witmlh 20.2ml of CH3OH ( density= 0.782g/ml), dissolved in 100.ml of water (density = 1.00 g/ml). Calculate the concentration in the units of:
If the temperature in the chamber is 103 °C after the charge is ignited, what is the pressure, in atmospheres, behind the cannonball when the gunpowder goes off?
The Density of the air in the room is 1.19g/L. what is the mass, in Kg of the air in a room that measures 14.5ft x 16.5ft x 8.0ft?
Calculate the ph at the equivalence point for titrating 0.170 solutions of each of the following bases with 0.170 M HBr.
AgCl precipitates first. What is the concentration of the Ag+ remaining in solution when CuCl begins to precipitate? For AgCl, pKsp = 9.74. and for CuCl, pKsp = 6.76.
What is the synthesis for the following compunds from simple organic precursors? Important Using original syntheses, not from published works.
A solution is prepared by adding 1.10 g of solid rm NaCl to 50.0 mL of 0.100 M {CaCl_2}. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
What is the Henry's law constant for the gas if the partial pressure of the gas in air is .0088 atm?
explain why addin eletcrons to a bonding orbital leads to bonding of an atom, in terms of electron distribution
a sample of argon is at a pressure of 1.24*10^4 kPa of 24 degrees c in a rigid 25-L tank. How many moles of argon does this tank contain?
What is the molecular formula of a gas that has a density of 1.88 g/L at STP? this is not the actual numbers but it would be nice to know how to do this.
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
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