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An unknown gas is found to effuse at a rate that is 1.864 times faster than Br2 at the same temperature. What is the identity of the gas?
Explain what it means that the atomic mass of naturally occurring Ag, is a mixture of its two isotopes forms, is 107.868 u.
The valence shell of the element X contains 2 electrons in a 5s subshell. Below that shell, element X has a partially filled 4d subshell. What type of element is X?
Calculate the length in km of a row containing 1 mole of hydrogen atoms laid side to side if diameter of a hydrogen atom =.212 nm?
Calculate the change in Gibbs free energy for each of the following sets of ΔH ° rxn , ΔS ° rxn , and T .
Compute ΔU for the transformation; a = 0.136 m6Pa mol-2 ; b = 0.0391 L/mol.
How many grams of water can be cooled from 36 degrees celsius to 23 degrees celsius by the evaporation of 53g of water.
Chlorine consists of two major isotopes with the following atomic masses: 35Cl (34.9689 amu) and 37Cl (36.9659 amu). The average atomic mass of chlorine is 35.4527 amu.
Compute the thermal-equilibrium values of hole and electron concentrations while Considering a homogeneous gallium arsenide semiconductor at the given temperature of T = 300 K with Nd = 1016 cm-3 and Na = 0?
Calculate the pH of this solution? if we want to lower the pH by one unit of this solution then How many mL of 0.1 M H 3 PO 4 should be added to this solution?
What is the osmotic pressure of human blood at 37°C if human blood is isotonic to 0.16 M NaCl solution? Remember that NaCl almost completely ionizes in water.
Boyle's apprentice observes that the air trapped in air tube occupies 24.8 cm3 at 1.12 atm.by adding mercury to the tube increases the pressure on the trapped air to 2.64atm. assuming constant temperature, determine the new volume of air?
A certain substance has a molar heat of vaporization of 31.6 kj/mol. How much of the sunstance is in a sample that requires 57 kj to vaporize.
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