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A mobile phone is comprised of 15.5% of copper, and nickel and silver comprise 2.5% . These three metals represent 83% of the potential toxicity that the components of the phone can exert on the environment. Describe how copper is toxic to the environment, and how this can affect the residents of an area (300 WORDS).
Mg3N2 + 6H2O ----> 3Mg(OH)2 + 2NH3 When 36.0g of H2O react, how many grams of NH3 are produced?
12.0 moles of gas are in a 8.00 L tank at 23.2 C. Calculate the difference in pressure between methane and an ideal gas under these conditions.
What is chlorphyll a in spinach. What is chlorphyll b in spinach. What is pheophytin a in spinach
Calculate the amount of heat in kilojoules released when 50 grams of steam at 125 degrees C are converted to 50 grams of ice at -125 degrees
How many kilograms of CaCl need to be added to 25L of ice slush to lower the melting point by 5 degrees C? Please show work. kfp=1.86
What is the molecular formula of a compound with a percentage composition 26.7% P, 12.1% N, and 61.2% Cl and a molecular mass of 695u.
Write balanced reactions for the complete combustion of each fuel and use standerd enthalpies of formation to calculate the amount of heat relesed per kilogram pf the fuel.
The rule works particularly well for weakly interacting molecules, such as those of a noble gas, but not so well for water among other substances. Assuming the rule is exact, estimate the molar enthalpy of evaporation for Argon (in kJ/mol), whose ..
How will each of these changes affect the cell potential and why? a) Solid sodium hydroxide is added to the copper cell. b) 0.15 M iron (II) sulfate is added to the iron cell. c) Water is added to each cell so that the volume of each solution is d..
Write the equilibrium expression that agrees with the equilibrium constant in part a. Calculate the equilibrium pressure of hydrogen gas needed to give an equilibrium ratio of CH3OH to CO equal to 10,000:1
sodium fluoride naf melts at 993c whereas sodium chloride fluoride melts nacl at 801c. explain why this is the case in
bromobutane can be converted to butan- ol using aqueous potassuim hydroxide solution. outline one possible method. that
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