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Author Archives: Anonymous

Of the substances below, which will hydrogen bond with water…

Of the substances below, which will hydrogen bond with water?  

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How much time (in seconds) is needed to deposit 0.0125 g of…

How much time (in seconds) is needed to deposit 0.0125 g of chromium from a solution of Cr(NO3)3 with a current of 1.50 A? The molar mass of chromium is 52.00 g/mol.  

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What isotope is depicted in the figure?      

What isotope is depicted in the figure?      

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For the reduction of silver with hydrogen: 2Ag+(aq) + H2(g)…

For the reduction of silver with hydrogen: 2Ag+(aq) + H2(g) → 2H+(aq) + 2Ag(s) Given the thermodynamic data in the table, what is the standard change in Gibbs free energy for this reaction at 298 K?   ΔHfo / kJ∙mol–1 So / J∙mol–1∙K–1 Ag+(aq) 105.58 72.68 Ag(s) 0 42.55 H2(g) 0 130.68 H+(aq) 0 0  

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Which solution all at 25 oC will have the highest vapor pres…

Which solution all at 25 oC will have the highest vapor pressure? Assume all solutions are ideal.

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For the decomposition of mercury(II) oxide, HgO, to mercury…

For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen: 2HgO(s) → 2Hg(l) + O2(g)   ΔGo = 117.1 kJ What is the standard Gibbs free energy of formation (ΔGfo) of mercury(II) oxide?

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Which set of quantum numbers is correct and consistent with…

Which set of quantum numbers is correct and consistent with n = 3?

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What is the limiting reactant when 10.0 g of carbon monoxide…

What is the limiting reactant when 10.0 g of carbon monoxide (CO, molar mass = 28.01 g/mol) and 15.0 g of iron(III) oxide (Fe2O3, molar mass = 159.70 g/mol) are allowed to react completely to form carbon dioxide (CO2) and iron (Fe).                         Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)

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A mixture is made of 100.0 mL of water and 1.0 g of silver c…

A mixture is made of 100.0 mL of water and 1.0 g of silver chloride, AgCl.  What does this solution look like and what mass of silver chloride is in the solution? The molar solubility of AgCl is 1.3×10–5 and the molar mass is 143.32 g/mol.

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The formation of hydrazine, N2H4, is: N2(g) + 2H2(g) ⇌ N2H4(…

The formation of hydrazine, N2H4, is: N2(g) + 2H2(g) ⇌ N2H4(l) This reaction has the energy diagram shown. Which change will increase the value of K?

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