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Question: The U.S. National Institute of Standards and Technology (NIST) defines STP to be 20 ?C and 101.325 kPa. Calculate the number density of a gas at STP (NIST). By what percentage does it differ from the number density of a gas at STP (IUPAC)?
at 25ordmc the solubility product constant ksp for strontium sulfate srso4 is 7.6acute10-7. the solubility product
a mixture of ch4 and h2o is passed over a nickel catalyst at 1000. k. the emerging gas is collected in a 5.00 l flask
A buffer that contains 1.10 M base, B, and 0.700 M of its conjugate acid, BH+, has a pH of 9.250. What is the pH after 0.0050 mol of HCl
prepared by dissolving 33.2 g of the compound in sufficient water to form 250 mL of solution. The solution has an osmotic pressure of 1.2 atm at 25 °C. What is the molar mass (g/mole) of the compound?
Silicon carbide is produced by heating silicone polymers, forming methane gas, hydrogen gas, and silicon carbide. Balance the reaction of heating [(CH3)2Si]8 to form silicon carbide.
A voltaic cell is prepared in which copper metal is oxidized to Cu(II), and silver ion is reduced to silver metal. Which of the following represents the correctly balanced equation for this reaction?
Write the KSp expressions for each hydroxide Calculate the solubility for each compound in aqueous solutions, arrange them from the smallest to the largest.
a chemistry student dissolved 500 grams of alcl3 in 2750grams of h2o. the resulting solution had a density of1.015 gml.
why does the alcohol become a double bond instead of remaining analcohol? doesnt it only turn into a double bond if it
State whether the sign of the entropy change of the following processes will be positive or negative. a. PCl3 (l) + Cl2 (g) -> PCl5 (s)
Assume that the density of the mixed solutions is 1.00 g/mL, that the specific heat of the mixed solutions is 4.18 J/(g celcius), and that no heat is lost to the surroundings. The deltaHrxn for the neutralization of NaOH with H2SO4 is -114 kJ/mol ..
Suppose if the initial amount of phosphorus-32 is 2.0 mCi, define how much phosphorus-32 is left in the body after 42 days? If the half life of phosphorus-32 is 14 days.
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