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Why is the H-O-H bond angle in a water molecule (H2O) smaller than the H-C-H bond angles in methane (CH4)?
Suppose a black-body chamber is constructed from 55.8 g (one mole) of iron and heated to 500 K. Classical theory and the observations of Dulong and Petit indicate that the total energy of vibration of iron atoms is 3RT per mole.
the volume of a sample of oxygen gas collected over water is 258 mL at 27 degrees C and 620.0 torr. Calculate the volume in milliliters of dry oxygen gas at STP. (the vapor pressure of water at 27 degrees C is 26.7 torr.)
A 1L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 850 torr. It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath. To what temperature (oC) will the oil bath need to be heated to first ..
How many moles of Cr(OH)3 will dissolve in 1.00 L of a solution with a pH of 4.85. (Assume the pH does not change as the Cr(OH)3 is placed in the water.) (Ksp for Cr(OH)3 is 6.7 x 10-31)
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid
Calculate the number of grams of sulfuric acid in 0.460 of battery acid if the solution has a density of 1.27 and is 37.8 sulfuric acid by mass.
How many grams of phosphorus react with 38.1 L of O2 at STP to form tetraphosphorus decaoxide. P4(s) + 5 O2(g) P4O10(s)
What mass of CaCl is needed to make 350 mL of a 0.233M CaCl solution?
Lead (II) nitrate and ammonium iodide react to form lead (II) iodide and ammonium nitrate according to the reaction. Pb (NO3)2 (aq) + 2NH4i (aq) --> Pbi2 (s) + 2NH4NO3(aq)
Construct a microstate table for a np3. I know that the # of microstates is going to be 6!/(3!(3!))= 20 microstates. really sure how to go about setting up a microstate table, could someone please explain
The vapor pressure of pure water at 25C is 23.8 torr. A solution is made by mixing 18.52g of an unknown non-ionic substance into 200.00g of water and the vapor pressure of the solution is found to be 23.3 torr. What is the molecular weight of the ..
Mixture of equal amounts of both enantiomers of given compounds does not rotate the plane of polarized light. (e) Racemic mixture has the same melting point as both corresponding enantiomer.
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