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Q. a boy has a newly minted penny that is composed of zinc and copper in actual composition it contains 2.7 percent of Cu ; determine the density of this newly minted penny if densities of zinc and copper 7.14 and 8.72 g/cm3?
Q. consider the given chemical equation when Aluminum sulfide(Al2S3) reacts with water(H2O) to form aluminum hydroxide(Al(OH)3 and hydrogen sulfide(H2S) as ( Al2S3 (aq) + 6 H2O (l) -----> 2 Al(OH)3 (s) + 3 H2S (g)..Now determine how many grams of aluminum hydroxide will get from 18.2g of aluminum sulfide?
What volume of 0.140 M Hydrochloric acid is required to neutralize 2.68g of Magnesium hydroxide.
Advantages and disadvantages of using Alternative Fuel and Would you consider buying one of these in the future? Why or Why Not and Why do you think there are not more of these vehicles in use?
Question enthalpy and entropy values are given and were asked to find boiling point of mercury
Quantum number representations - What are the possible values of the four quantum numbers for one electron in a 5d orbital?
A buffer solution containing 0.25 M Acetic acid and 0.56 m Sodium acetate. After addition of 0.0060 mol HCL what is Ph of buffer.
How many grams of water should be produced and What is the theoretical yield of nitrogen?
Write a balanced molecular equation for these ten combinations.
A boy receives 10mg of medicine for every kg he weighs. How much medicine should he receive if he weighs 48 pounds and the conversion factor for pounds to kilograms is 1 pound = 0.4536kg.
With respect to the corrosion of steel in concrete, explain the significance of the following terms: carbonation of concrete, passivity of steel, electrical resistivity of concrete, state of oxidation of iron.
Explain what it means that the atomic mass of naturally occurring Ag, is a mixture of its two isotopes forms, is 107.868 u.
Give explanation for arrangements how you decide the boiling points comparison - Arrange all these compounds in order of increasing boiling points
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
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