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A piece of wood found in an archaeological dig has carbon-14 activity of 5 counts per minute (cpm). New wood has a cpm of 40. The half-life of carbon-14 is 5730 years? What is the age of the wood?
If an organic chemist nitrated chlorobenzene, would the ortho:para ratio be less than, equal to, or greater than the 38:62 ratio observed with the nitration of bromobenzene
How many Sr2+ ions are in a mole of Sr3(PO4)2? Also, how many PO43- ions are in a mole of Sr3(PO4)2?
Problem- An 61.32 g sample of aluminum is placed on a 60.29 g sample of copper initially at 96.9oC. If the heat is only transferred between the metals (with no loss to the surroundings) and the final temperature of both metals is 40.77oC, what is ..
Suppose a nearby storm passage causes the wind speed in the town to suddenly increase to 10.0m/s. What is the carbon monoxide concentration one hour later?
what masses ofnbsp calcium sulfate and phosphoric acid can be produced from the reaction of 1.0kgnbsp calcium phosphate
Trichloroacetic acid (CCl3CO2H) is a corrosive acid that is used to precipitate proteins. The pH of a 0.050 M solution of trichloroacetic acid is the same as the pH
Calculate the standard enthalpy change, the standard entropy change, and the standard free energy change for the reaction: N2 (g) + 3 F2 (g) ? 2 NF3 (g) How will the sign of ?G change as the temperature increases
Hydrochloric acid (HCl) reacts with sodium carbonate (Na_2CO_3), forming sodium chloride (NaCl), water (H_2O), and carbon dioxide (CO_2). This equation is balanced as written
Explain what action must take from the following error- when you go to measure the distance traveled by the spots and solvent, you discover that you didn't mark the solvent front before it dried.
A detailed mechanism for the formation of ethyl acetate from ethanol as well as acetic acid with H2SO4 as catalyst
d. If you were measuring the 5-day BOD in the lab, how many mL of this solution would you add to a 300 mL BOD bottle to ensure that the final DO doesn't drop below 1 ppm? Assume that the initial DO is 8.26 ppm. (35.4 mL)
Calculate the mass of glucose in a 110 sample of a 1.14 M glucose solution.
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