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If a house has a carbon monoxide concentration of 5.0 ppm. Explain what volume of carbon monoxide is present in 1.0 l of air
Write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water, H2O. Phases, such as (aq) or (l), are optional.
Strong base is dissolved in 615 mL of 0.400 M weak acid (Ka = 4.50 × 10-5) to make a buffer with a pH of 3.95. Assume that the volume remains constant when the base is added.
Draw a lewis dot structure for ketoisophorone to figure out how many non bonding pairs of electrons there are in the molecule.
Calculate the heat evolved when 306 g of white phosphorus (P4) burns in air according to the equation below.
an automobile gasoline tank holds 49 of gasoline. when the gasoline burns 172 of oxygen are consumed and carbon dioxide
The energy required to ionize boron is 801 kJ/mol. What minimum frequency of light is required to ionize boron?
A bacterial culture isolated from sewage produced 35.0 mL of methane, CH4, at 31°C and 753 mmHg. What is the volume of this methane at standard temperature and pressure (0°C, 760 mmHg)?
The electrolysis of molten A12O3 at 980 ºC is used to produce metallic aluminum. A current of 777 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms per hour
Pu-239 (nuclear mass of 239.0006 amu) decays by alpha emission to U-235 (nuclear mass of 234.9934). Calculate how much energy is given off by the decay of 2.00 mg of Pu-239.
a gas occupies a volume of 458 mL at a pressure of 1.01kPa abd temperature of 295 K. When the pressure is changed, the colume becomes 477 mL. If there had been no change in temperature, what is the new pressure?
Determine the molarity of Fe+3 ions and SO4-2 ions in a solution prepared by dissolving 48.05g of Fe2(SO4)3 in enough water to make 800.0mL of solution.
If solar radiation is 1010 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 for solar radiation.
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