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A student wishes to establish experimentally the number of fungal particles in a fixed volume of air. He uses a liquid medium suitable for the growth of most fungi and exposes the liquid to air in a rectangular container of dimensions 15 cm × 15 cm, he then seals the container. He then measures the depth of air above the liquid inside the sealed container and finds it to be 10 cm. After a period of 1 week there are 9 patches of fungus growing on the liquid medium. 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. Type your answer in to the box below; the correct units are already given. Number of fungal particles in 1 m3 of air = Superscript (↑) fungal particles m-3
A sample of laughing gas occupies 500.0Ml at a standard temperature and pressure . what volume will the gas occupy at 95.0oC and 525 torr.
Find reactant and product information, Balance the following reaction: Mn + HCl --> MnCl2 + H2, If you have 100g of Mn and 100g of HCl find
a soulution is prepared by mixing 25.0ml of .100M HCL and 2.00mL of .200M NaCl. what is the molarity of the chloride ion solution
Calculate the radius of a Au (gold) atom if Au atom has a face-centered unit cell ? it is given that its density = 19.32 g/cm 3 .?
Use the de Broglie relationship to determine the wavelengths of the following objects: an lithium atom moving at 2.5*10^5m/sUsing Heisenberg's uncertainty principle,
Using a phosphorus 12.39 g sample that reacts with 42.54 grams of chlorine to produce only phosphorus Trichloride (PCl3). If it is the only product, determine what mass of PCl3 is formed?
What is the total volume of gaseous products formed when 198 liters of propane (C3H8) react completely according to the following reaction? (All gases are at the same temperature and pressure.) propane (C3H8) (g) + oxygen (g) --> carbon dioxide (g..
A camping lantern uses the reaction of calcium carbide, CaC2 (s) , and water to produce acetylene gas C2H2 (g) , and calcium hydroxide, Ca(OH)2 (s) . How many grams of water are required to produce 1.55 moles of acetylene gas
A solution is prepared by adding 5.00 grams of an unkown compound to 217 g of cyclohexane (C6H12). This solution freezes at 4.5 degree C.
If you have 60.5 g NH3, how many grams of F2 are required for complete reaction?
How many electrons must aluminum lose before it can reach a stable electronic configuration? Use the table of ionization energy to justify your answer.
If the spectrophotometer that was used was miscalibrated so that each absorbance reading was too high by 0.100 units
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