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A 1g sample of carbon obtain from material found in a ancient site gave 7900 carbon-14 disentegrations in a 20-hour period. In the same amount of time 1g of carbon from a source found yesterday under went 18,400 disintegrations. Calculate the age of the sample. Given - Half-life of Carbon-14 is 5.73x10^3 year Show steps
HCl according to the following chemical equation? MnO2+4(HCl) --> MnCl2 + Cl2 + 2(H2O)
You have 47.2 mL of a solution of copper(II) chloride (CuCl2?). You need to determine the concentration of Cu2+ in the solution gravimetrically.
A backpacker wants to carry enough fuel to heat 2.7 of water from 30 to 100.0 . If the fuel he carries produces 36 of heat per gram when it burns, how much fuel should he carry? (For the sake of simplicity, assume that the transfer of heat is 100 ..
How many amps are required to produce 28.7 g of lithium metal from a sample of molten lithium chloride
A 32.0-g sample of water at 260. K is mixed with 47.0 g water at 300. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Express your answer with the appropriate units. Indicate the multiplication of units explicitly either with a multiplication dot (asterisk) or a dash
A 245 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
A fire occurred in a storage room where a steel cylinder of oxygen-enriched air was kept. The pressure of the gas in the cylinder was 300 atm at 20 C.
Calculate the mass fractions of the components in the mixture and the average molecular weight of the gas mix. b)The gases are mixed with 20% excess air and completely combusted with 100% conversion
Explain What is the concentration of the HCl, A 25.00 mL sample of HCl of unknown concentration is completely neutralized with 25.00 mL
What makes a red solution, like cherry Kool-Aid appear red to your eye? What colors of light are absorbed and what colors are transmitted?
A particular diatomic molecule which contains H exhibits a 16.95 cm^-1 spacing between its rotational lines and bond length of 141.5 picometers. Determine the mass (in amu) of the unknown atom in the molecule.
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