Why the potassium reacts with oxygen
Potassium reacts with oxygen to make potassium oxide,K2O. What is the maximum mass (g) of K2O(s)that could be prepared from 8.24 g of K(s) and 2.64 g ofO2(g)?
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A 0.6407 g sample containing chloride & iodine gave a silverhalide precipitate weighing 0.4430 g. This precipitate was thenstrongly heated in a steam of Cl2 gas to convert AgI toAgCl; upon completion of this treatment, the precipitate weig
A 4.476 g sample of a petroleumproduct was burnt in a tubefurnace, and the SO2 produced was collected in 3%H2O2. Reaction: SO2(g) +H2O2--> H2SO4.
The enthalpy of solution of KBr in water is about +198 kJ/mol.Nevertheless the solubility of KBr is water is relatively high. Why does the solution process occur even though it is endothermic?
What is the molar concentration of Cl- in a solution prepared by mixing 25.0 ml of 0.025 M NaCl with 35.0 mLof 0.05 m BaCl2 ? What is the pCl for the mixture?
The force in the cable is F= (3200 t^2) N, where t is in seconds. (Incline is a 17-8-15 triangle) If the car has an initial velocity v1= 2m/s at s= 0 and t= 0, determine the distance it moves up the plane when t= 3s.
Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 3200 N on the car. (a) What is the coefficient of static friction between the track and the car's tires?
Calculate the fraction of atom sites that are vacant for lead at its melting temperature of 327°C (600 K). Assume an energy for vacancy formation of 0.55 eV/atom.
Calculate the energy for vacancy formation in silver,given that the equilibrium number of vacancies at 800°C (1073K) is 3.6 x 10^23 m-3. The atomic weight and density (at800°C) for silver are, respectively, 107.9 g/mol and 9.5g/cm3
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