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A swan can float on a lake with only 33% of its volume below the surface. What is the average density of the swan?
A quantity of Oxygen (g is originally at 4.75 atm and 26 degree Celsius in a 5.00 Litre container is transferred into the same container determine the total pressure in the new container?
Calculate the number of moles of Cl atoms in 1.81×1024 formula units of magnesium chloride,MgCl2 . Express your answer numerically in moles.
Find the Density of a substance with a mass of 51.2g and a volume of 150mL
Suppose you want to cook pasta in boiling, salty water. What is effect of salt (NaCl) addition to water on the boiling point temperature of the resulting solution?
When a positron and an electron collide and annihilate each other, two photons of equal energy are produced.
Iodine is prepared both in the laboratory and commercially by adding Cl2(g) to an aqueous solution containing sodium iodide. How many grams of sodium iodide, NaI must be used to produce 19.1g of iodine, I2
The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning the formation and decomposition of ozone in the stratosphere
Many cigarette lighters contain liquid butane. Using standard enthalpies of formation, calculate the quantity of heat produced when 5.00 g of butane is completely combusted in air under standard conditions.
If you are given sodium acetate and asked to make a .5 M acetate buffer at pH 4.75, will you have to add acid, base, or nothing in order to achieve the proper pH? What is the approximate pH after adding the sodium acetate?
How much heat is required to vaporize 55.8g of acetone at its boiling point? The heat of vaporization of acetone at its boiling point is 29.1 kJ/mol
What is the value of Kc for the decomposition of ammonium carbamate into ammonia and carbon dioxide?
You have weighed out 520 mg of methyl oleate. Knowing that the sample you received only contains 70 % of methyl oleate, how many mmole of methyl oleate did you weigh out
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