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Consider the decay series A¡B¡C¡D where A, B, and C are radioactive isotopes with halflives of 4.50 s, 15.0 days, and 1.00 s, respectively, and D is nonradioactive. Starting with 1.00 mole of A, and none of B, C, or D, calculate the number of moles of A, B, C, and D left after 30 days.
a premature infant is born. she weighs less than normal. her mother has been on a near starvation diet for the last month. the infant's blood glucose at birth and 5 hours later is very low. the problem may have been
Calculate the distances NH3 gas and HCL gas would travel in this experiment if a 100.00-cm tube were used, based on the accepted molar masses of the two gases.
Calculate the standard cell potential at 25 degrees celsius for the reaction X(s)+2Y+(aq) -> X^2+(aq)+2Y(s) where delta H = -733 kJ and delta S = -279 J/K Express your answer to three significant figures and include the appropriate units.
if 32ml of 7.0m h2so4 was spilled what is the minimum mass of nahco3 that must be added to the spill to neutralize the
Select the IR frequency and number of NMR signals that is diagnostic for either isomer a or isomer b. Isomer A: cyclopentanecarboxamide Isomer B: 6-hydroxyhexanenitrile
If an automobile air bag has a volume of 12.2 L, what mass of NaN3 (in g) is required to fully inflate the air bag upon impact. Assume STP conditions. 2NaN3(s) --> 2Na(s) + 3N2 (g)
67 g of ice at 0 degree C added to a sample of water at 6 degrees, all the ice melts and decreases to 0 degrees. how many grams of water was in the sample?
Determine the PH of each of the following a) 10mL of .2M Acetic acid and 1.00mL of .1M sodium hydroxide, and 9.0 mL of distilled water
Determine the number of moles of O2 produced by the decomposition of 426 g of NaClO3
an alka-seltzer tablet contains 1.916 grams of sodium bicarbonate. using the formula h3c6h5o7 3nahco3-gt nac6h5o7 3h2o
Identify the acid and base on the left side of the following equations and identify their conjugate species on the right side
The atomic weight of Sm is 150.36 and that of Nd is 144.24. The isotopic percentage abundance of 147Sm is 15.0 and that of 144Nd is 23.954.
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