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The total surface area of the earth consisting of forest, cultivated land, grassland, and desert is 1.49 x 108 km2 . Every year, the mass of carbon fixed by photosynthesis by vegetation covering this land surface according to the reaction 6CO2 (g) + 6H2 O (l)------> C6H12O6(s) + 6O2 (g) is about 450. metric Tons km-2 . Calculate the annual enthalpy change resulting from photosynthetic carbon fixation over the land surface given above. Assume P=1 bar and T=298K.
Explain why the benzyl carbocation is more stable than the allyl carbocation?
7.5g of ammonia at STP is heated to a temperature of 25C and simultaneously compressed to a volume of 8.0L. Calculate the new pressure of the gas.
Draw a Lewis structure for each of the following molecules and determine its molecular geometry. What kind of intermolecular forces are present in each substance?
Calculate the number of fungal particles present in 1 m3 in the original air sample and express your answer in scientific notation, to one significant figure.
Consider an electrolysis cell that might be used to electroplate nickel onto other metal surfaces. Label the anode and the cathode
What is the entropy of the combustion above?
How does the hydrogen ion (H+) [or the hydronium ion (H3O+)] and the hydroxide ion (OH-) fit into all of this? What is their role in this reaction?
Organelles compartmentalize a cell like a department store displays similar items together. What advantage does such compartmentalization offer a large cell and what are two examples of oraganelles and the activities they compartmentalize?
Consider the lewis structure for the polyatomic oxyanion shown below, where X is the element from the 3rd period (Na- Ar). By changing the overall charge
A chemist wants to make 6.0L of a .350M CaCl_2 solution. What mass of CaCl_2 should the chemist use?
A reaction has a rate consant of 1.23/mol*s at 433 Celcius and 24/mol*s at 533celcius.
The temperature of 55.6 g of a material decreases by 14.8C when it loses 3080 J of heat. What is its specific heat?
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