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How many moles is 2.80x1024 atoms of silicon?
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The decomposition reaction of NOBr is second order in NOBr, with a rate constant at 20°C of 25 M1 min 1. If the initial concentration of NOBr is 0.025 M, find
(a) the time at which the concentration will be 0.020 M.
On passing an electric current in copper II chloride solution, the concentration of the
solution decreased -as time passed- due to the reduction of some copper cations at the cathode. If a quantity of electricity is passed in a solution of 2 L and concentration of 0.5M, what is the concentration of the solution after passing a quantity of electricity of 48250 Coulombs?
Calculate the volume of oxygen involved at room temperature and pressure when 0.01 mole of potassium chlorate is decomposed
Calculate the AH°m for the reaction 2S+20F₂ (0) using the following thermochemical reactions: 2(0) 1 SO₂+ SF
Calculate the AH°m for the reaction 2S+20F₂ (0) using the following thermochemical reactions: 2(0) 1 SO₂+ SF
Calculate the AH°m for the reaction 2S+20F₂ (0) using the following thermochemical reactions: 2(0) 1 SO₂+ SF
how many moles of pb(no3)2 are required to react with 10L of 31 m of kcl
How does a chemist illustrate the molecular structure of THC
At 2.00K the vapour pressure of liquid helium is 3173 PA and the heat of vaporisation is 92.048J/mol. Calculate the Lowest temperature which can be obtained by pumping on a a Dewar flask of liquid helium with a pumping system which will achieve an ultimate steady-state pressure of 133.32 PA. You may assume that the molar volume of the liquid is negligible and the vapour behaves like an ideal gas.
b) If the heat into the Dewar is 4.184J per minute, estimate the pumping speed in m^3 per minute at 133.32 PA and 309K ( temperature of gas at the pump).
#339914 on Dec 2023