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(a) How many atoms of helium gas fill a spherical balloon of diameter 31.0 cm at 18.0°C and 1.00 atm?
(b) What is the average kinetic energy of the helium atoms?
(c) What is the rms speed of the helium atoms?
Write the balanced reaction and determine the mass of KNO3 that should be mixed with 6.1 g of sugar to produce optimally balanced rocket candy.
18.6 grams of a solute with molecular mass of 8940 grams are dissolved in enough water to make 1.00 dm? of solution at 25 àC. What is the osmotic pressure of the solution?
Calculate the standard potential for this cell at 25 °C. Standard reduction potentials can be found here.
Two identical balloons are filled with the same volume, one with air and one with helium. The next day the volume of the air-filled balloon has decreased by 4.5%, by what percent has the volume of the helium-filled balloon decreased
Zinc metal can be obtained from zinc oxide (ZnO) by reacting the oxide with the element carbon. The products of the reaction are Zn and CO2. What mass of zinc oxide is needed to react completely with 2.22 mol of carbon? Answer in units of g
What is the minimum pH required to prevent the precipitation of SnS in a solution that is 0.0010 M Sn(NO3)2 and saturated with H2S (0.10 M)? (ksp = 1.0 x 10 ^-25 K1K2 = 1.3 x 10 ^-20)
A sample of neon gas has a volume of 282 mL AT 160 degrees celsius. The sample is cooled at constant pressure to a volume of 685 mL. What is its new temperature?
Show how to synthesize 2-methyl-2-pentene from an alkyl halide and an aldehyde or ketone, plus any other necessary reagents. Then show the reagents necessary to convert butyraldehyde into the following. There may be one more step
The solubility of calcium chromate is 1.56 ×10-3 g/100 mL of solution. What is the Ksp for CaCrO4?
some hydrated metal chlorides will decompose upon heating, evolving hydrogen chloride along with water. How could one determine if this was happening to a sample of a particular metal chloride hydrate
the value of eo for the following reaction is 0.63v. what will the cell potential be when the zn2 0.00020m and the pb2
Does anyone now the balanced equation (including moles for each reactant and product) for 1-pyrrolidino cyclohexene
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