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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?
A 1.0 L buffer solution is 0.250 M LiC2H3O2 and 0.050 M HC2H3O2 . Which of the actions will destroy the buffer? (a)adding 0.050 moles of LiC2H3O2(b)adding 0.050 moles of HCl(c)adding 0.050 moles of HC2H3O2(d)adding 0.050 moles of NaOH.
Calculate How many mL of the HCl solution was required for the titration.
Solving this question helps the student to understand how to find molecular formula using moles and mass and What is the molecular formula of this compound?
Draw Lewis dot structure and predict molecular geometry - Show the Lewis structures of the following molecules and then predict their geometry.
What volume of 0.200M Hydrochloric acid must combined to 250mL of 0.300M C8H7NaO3 to produce a buffer of solution with a pH of 3.37?
Determine the partial pressure. Calculate the total pressure and volume in liters at STP of Nitrogen, Helium and Neon mixture.
Determine the numbers of moles of S8 that are required to make 0.600 moles of SF4.
Find the new volume of the gas sample - What is the new volume of the gas sample
Calculate Gibbs free energy and determine the type of thermodynamic reaction and what type of thermodynamic reaction is shown.
Question : Explain and show how you would sythesise the following compounds, starting with benzene or toluene and any necessary acyclic reagents. Assume para is the major product.
By Solving this problem student is able to understand how to calculate theoretical and percent yields in an experiment - determine theoretical and percent yields for this experiment.
Uses of de-Broglie equation in electromagnetic specra - Find the mass of oxygen and decomposed potassium chlorate along with the pressure in the glass bulb.
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