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1. In order for a gas to be a "greenhouse gas" it must
2. The normal process occurring on Earth that warms its surface and the lower atmosphere is called
3. Which statement about ozone and the ozone layer is true?
Ozone is found in a band of almost pure ozone several kilometers thick encircling the Earth.
The ozone in the ozone layer absorbs UV light between 200 and 300 nm. Ozone is a compound with the chemical formula CO2.
In the Earth's atmosphere, ozone exists only in the ozone layer.
4. Which one of the following reactions is an example of nitrogen fixation?
N2O5(g) ? NO3(g) + NO2(g)
N2(g) + O2(g) ? 2NO(g)
3NO2(g) + H2O(l) ? 2HNO3(aq) + NO(g)
2NO(g) + O2(g) ? 2NO2(g)
A student plans to titrate 25 mL of a .134 M HNO3 solution with .179 M NaOH solution. Calculate the volume of NaOH that will be needed to reach equivalence point.
The rate law for a hypothetical reaction is rate=k[A]2 When the concentration is 0.10 moles/liter, the rate is 2.7 * 10-5 moles/liter second. What is the value of k?
Write the formulas for each of the following ions and compounds: (a) tetrahydroxozincate(ll) (b) pentaaquachlorochromium
What is the silver ion concentration in a solution prepared by mixing 457 mL of 0.373 M silver nitrate with 475 mL of 0.442 M sodium phosphate?
A gamma ray has a frequency of 3.5 x 1019Hz. Determine the wavelength of this radiation in nm and the energy of a photon of this radiation.
Light with a wavelength of 330nm shines on a piece of metal with a threshold energy of 4.60 eV. What would you expect for the kinetic energy
A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.5 cm. Its mass is 1.2 kg. Calculate the density of the metal.
What is the correct order of decreasing heats of hydrogenation of the following Dienes. I. 3-Methyl-1,3-Hexadiene II. 3-Methyl-1,5-Hexadiene III. 4-Methyl-1,2-Hexadiene
Calculate the equilibrium constant, Ke, for the reaction assuming the concentrations for reactants and products are the following
a 5.00 gram sample of potassium chlorate/potassium chloride mixture was heated in a test tube. A total of 1.00 L of oxygen gas was collected over water at 25 degrees c and 741 torr. determine the percentage of potassium chlorate in the mixture.
At 900 titanium tetrachloride vapor reacts with molten magnesium metal to form solid titanium metal and molten magnesium chloride. Write a balanced equation.
Is the melting of wax a physical or chemical change? from the mass measurement only,( the mass of the candle at 0 minute is 10.1g, after 30 minutes is 7.4g) how could a chemical also be proved to have occured in the burning of candle.
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