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Author Archives: Anonymous

Calculate ∆E of a gas for a process in which the gas absorbs…

Calculate ∆E of a gas for a process in which the gas absorbs 60J of heat and does 17 J of work by expanding.

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Gold has a specific heat of 0.129 J/(g×°C). How many joules…

Gold has a specific heat of 0.129 J/(g×°C). How many joules of heat energy are required to raise the temperature of 15 grams of gold from 22 °C to 85°C?

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Use a standard enthalpies of formation table to determine th…

Use a standard enthalpies of formation table to determine the change in enthalpy this reaction. CH4(g) + 2 O2(g) —> CO2(g) + 2 H2O(l)  Compound      Enthalpy value CH4 (g)                            -74.8 kJ/mol O2 (g)                                  0 kJ/mol CO2 (g)                                -393.5 kJ/mol H2O (l)                                 -285.8 kJ/mol

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   How would you prepare a 0.5 M solution of sodium hydroxid…

   How would you prepare a 0.5 M solution of sodium hydroxide? 

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What is the main component of vinegar that is titrated?

What is the main component of vinegar that is titrated?

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Select all facts about titrations from the statements below.

Select all facts about titrations from the statements below.

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 How many atoms are in 1 mole of calcium?   

 How many atoms are in 1 mole of calcium?   

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  What is the total number of atoms contained in 2.11 moles…

  What is the total number of atoms contained in 2.11 moles of nickel? 

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 How many grams are in 2.05 x 10+23 molecules of dinitrogen…

 How many grams are in 2.05 x 10+23 molecules of dinitrogen pentoxide? 

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What is the molar mass of (NH4)3PO4?    

What is the molar mass of (NH4)3PO4?    

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