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The half-life of cobalt-60 is 5.2 yr. How many milligrams of a 2.000-mg sample remains after 6.55 years? Show your work.
For a protein w/ a molar mass of 1x10 6 u, calculate the molar concentration required to obtain an osmotic pressure of 10 matm at 25 degrees C
Calculate the boiling point of a solution prepared by dissolving 70.0 g of naphthalene, C10H8 (a nonvolatile nonelectrolyte), in 220.0 g of benzene, C6H6. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
A titanium rod of length 10 cm and circular diameter of 2 cm is pulled in tension with a load of 100000 N. The rod elongates by 0.01 cm under the load but recovers to its original length when the load is released.
Write an equation for determining the average atomic mass number of an element that has two isotopes. Isotope 1 has a relative abundance of 33%, and isotope 2 has a relative abundance of 66%.
How much magnesium chloride would you have to purchase to make up 10.0 L of bath water saturated with magnesium chloride
Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.
A 41 kg person drinks 250. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 17% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
Aluminum reacts with oxygen gas in a combination reaction to produce aluminum oxide. How many moles of oxygen gas are needed to react with 1.64 moles of aluminum
Draw line-angle structural formulas for 8 constitutional isomers that have a molecular formula C4H8O.
when 10cm3 of a gaseous hydrocarbon cahb was exploded with an excess of oxygen a contraction of 35cm3 occured all
calculate the concentration of a monotropic basic solution given that 99.3ml of the basic solution is neutralized by
What products result from the addition of aqueous solutions of F_e (C_2 H_3 O_2 )_2 (aq)and N_a3 PO_4 (aq)?
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