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It is only through the study of isolated and purified elements and their combination that one can observe characteristic properties and make cause and effect relationships. What does this statement mean and why can't this be said about mixtures?
Electrum is the name given to Au-Ag alloys when Ag exceeds 20wt%. Determine the density of electrum with exactly 20 wt %Ag. If the market price of Au and Ag are $400 per ozt and $7 per ozt respectively,
what reaction will take place between sodium bicarbonate and hydrochloric acid? please show balanced equation. help
What is the molecular formula?
Sodium carbonate reacts with silver nitrate to produce sodium nitrate and solid silver carbonate
The equilibrium constant for a reaction at 800K is 14.2. If the enthalpy of the reaction is 30 kj/mole, what would be the equilibruim constant
A sample of steam with a mass of 0.552 g and at a temperature of 100 degrees C condenses into an insulated container holding 4.50 g of water at 6.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of ..
When a bulkheterojunction organic solar cell was irradiated with monochromatic light of 8 mW/cm2, it showed the short circuit photocurrent of 3 mA/cm2. Find at which wavelength (nm) the monochromatic light was irradiated. The external quantum effi..
A sample of commercial concentrated perchloric acid is 11.0 M HClO4 and has a density of 1.60 g/mL. Calculate the mass %, molality and mole fraction of HClO4.
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 of nitrogen and 4.05 of oxygen emperical formula
explain in detail the steps and the energy involved in each step for the conversion of bromine gas and lithium solid to lithium bromine solid.
Determine the molarity of a solution that is formed by dissolving 21.0 g of CaF2 in a flask and adding water to make 446.2 mL of solution
A buffer, consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system. What is the pH of a soft drink in which the major buffer ingredients are 8.00 g of NaH2PO4 and 6.70 g..
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