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The half-life for the radioactive decay of C-14 is 5730 years.
A) How long will it take for 20% of the C-14 atoms in a sample of C-14 to decay?
B) If a sample of C-14 initially contains 1.9 mmol of C-14, how many millimoles will be left after 2270 years?
In photosynthesis, plants use energy from the sun in combination with carbon dioxide and water to form glucose (C6H12O6) and oxygen. If 4.50 moles of water react with carbon dioxide, what mass of glucose is produced?
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Out of what will you construct your calorimeters? please answers have to be related to chemistry and specifically to this experiment.
Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn2+(aq)+2e- -> Zn(s) For a large batch of nails, a manufacturer needs to plate a total zinc mass of 1.60 kg on the surface to get adequat..
KBr solution added to this colorless solution will cause pale yellow AgBr to precipitate. List the species, Cl-, NH3, or Br- in order of decreasing stability of the compounds or complexes that they can form with silver and explain your reasons.
What's more significant an affect on atomic size, an increase in nuclear charge or increase in occupied energy levels within a group
State the meaning of alpha and beta with regard to steroid structure, and indicate whether the hydroxyl group on ring A
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What is the value for the equilibrium constant (K = KP ) at 1200 K for the reaction: 2HBr +1/2O2 ?? Br2 + H2O. b) What is the value of ?rG? at 1200 K temperature for the reaction in a)
A reaction mixture initially contains 4.2 mol ZnS. a. How many moles of oxygen will be required to react with ZnS b. Assuming there is enough oxygen,
How much energy is required to completely vaporize a gallon jug of ice (128g) at 0C in 10 seconds? (in kilojoules)
The instruction booklet for your pressure cooker indicates that its highest setting is 11.6 . You know that standard atmospheric pressure is 14.7 , so the booklet must mean 11.6 above atmospheric pressure.
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