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When metal X is placed in a solution of Y2+, the surface of metal X changes colour. When metal Y is placed in acid solution, colourless gas bubbles form on the surface of the metal. When metal X is placed in a solution of Z2+, no change is observed in the solution or on the surface of metal X.
Will metal Z cause formation of H2 when placed in acid solution? Explain your answer.
Calculate the maximum mass of calcium metal that should be used in an equivalent mass determination with a 100-mL gas measuring tube for collection. For the purposes of calculation, assume 80.0 mL of hydrogen gas produced at standard conditions
Calculate the mole fraction of Ne in a 25.0-L vessel that contains 6.50 g of O2, 10.6 g of Ar, 20.0 g of Ne, and 3.65 g of He at 75.00C. Calculate the total pressure of the mixture in Question 3.
The specific heat capacities of the liquid and gas are 0.995 J/g.K and 0.622 J/g.K respectively. How much heat is required to convert 2.500 kg of solid SO2 at the melting pt. to a gas at 60 deg Celsius
Calculate the mass of sodium acetate that must be added to 500.0mL of 0.200M acetic acid to form a pH = 5.00 buffer solution.
Calculate the pH after 0.015 mole of gaseous HCl is added to 273.0 mL of each of the following buffered solutions. (Assume that all solutions are at 25°C.)
A material is found to have a tenth-thickness of 2.3 cm for 1.25-MeV gamma rays. a) what is the linear attenuation coefficient for this material? b) What is the half thickness? c) what is the mean-free-path length for 1.25-MeV photons in this mate..
24 mL of 0.25 M NH3 solution is titrated with 0.40 M HNO3 solution, calculate the pH of the solution when 10 ml of HNO3 is added. Kb(NH3)=1.8*10^-5.
Derive the relationship between the total energy and the molecular partition function for indistinguishable particles
An element X forms the oxalate complex X2C2O4 which is 7.91% C and 21.07 % O by mass. What is the identity of the Element X
The oxidation number of Cr changes during the reaction from ____ to ___. Because of this change, chromium is reduced/oxidized (circle one). The oxidation number of the alcoholic carbon changes from ___ to ___. Because of this change, the carbon is..
Nitric acid is usually purchased in a concentrated form that is 70.3% HNO3 by mass and has a density of 1.41 g/mL. How much concentrated solution would you take to prepare
Problem- A 0.5063g sample of a mixture of sodium and potassium carbonates required 41.84 mL of a 0.2023 M HCl solution to react the titration endpoint. What is the percentage of carbonate as CO3(2-) in the sample
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