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A sample containing 15ug of Scandium Sc-45 is irradiated to where 0.01% of the atoms have captured a neutron and become Sc-46. Half life 831d. Explain what is the activity of the sample upon removal from the reactor and 45 days later?
What is the equilibrium constant, Kc, for the reaction at this temperature?
Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose that a can contains a residual amount of gas at a pressure of 765mmHg and a temperature of 20?C.
An acqueous solution of Kl has a freezing point of -1.80 C and an osmotic pressure of 26.0 atm at 25.0C. Assume Kl completely dissociates in water. What is the density of the solution
In your laboratory you're studying a chemical reaction that follows the general rate law: rate = k[A]. Initial experiments show a rate of 0.001412 M/s when [A] = 0.519 M at 299 K.
What is the concentration in moles per liter of SbCl5 in the container before any decomposition occurs. What is the preassure in atmospheres of SbCl5 in the container before any decomposition occurs. PV=nRT
If 358 mL of H2SO4 is neutralized with 60.0 mL of 1.50 M NaOH, what is the initial concentration of the acid?
Place the following gases in order of increasing average molecular speed at 300. K: CO, SF6, H2S, Cl2, HBr. (Use the appropriate symbol to separate substances in the list.) chemPadHelp SF6
How does C 10 H 12 O 2 eugenol combine with Br bromine in CCl 4 carbon tetrachloride and concentrated H 2 SOP 4 at the temperature of 20 degrees Celsius?
C3H8 + 5O2 reacts to yield 3CO2 + 4H2O +488 kJ What is the heat released if 2.5 moles of C3H8 reacts completely with oxygen?
What is the theoretical yield of acetic acid when 22.5 g of methanol reacts with 32.0 g of carbon monoxide in the following equation: CH3OH + CO --> HC2H3O2
aluminum oxide decomposes to produce aluminum metal and oxygen gas. when 9.8g of aluminum oxide decomposes how many
what is the density of a block of marble that occupies 306 cm3 and has a mass of 804 g? answer in units of g/cm3.
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