05/04/21

Calculate the equilibrium constant for the following reaction at 25 °C, given that ΔG°f(A) = -105 kJ/mol, ΔG°f(B) = -88 kJ/mol, ΔG°f(C) = -217 kJ/mol, and R = 8.314 J/mol•K 2A + B ⇌ C
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05/04/21

Which gases deviate LEAST from ideal gas behavior?
HeNeCO2H2O2SO2CH4Cl2N2
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05/04/21

The reaction C6H6 + O2 → CO2 + H2O has an activation energy (Ea) of 425 kJ/mol, and the Ea of the reverse reaction is 960 kJ/mol. Estimate ΔE, in kJ/mol, for the reaction as written above.

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05/04/21

For the following first-order reaction, if you TRIPLE the initial concentration of A from 0.100 M to 0.300 M, which of the following is TRUE? A→B
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05/04/21

What amount of enthalpy is required to transform 100.0 g of liquid ethanol at 23°C to ethanol vapor at 95 °C?

The specific heat of liquid ethanol, C2H5OH(l), is 2.46 J/g·°C and that of ethanol vapor is 1.88 J/g·°C; the heat of vaporization is 39.3 kJ/mol. The boiling point of ethanol is 78 °C.
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05/04/21

Calculate the pH of a buffer solution that contains 0.375 M benzoic acid (C6H5CO2H) and 0.375 M sodium benzoate (C6H5COONa). [Ka = 6.5 x 10-5 for benzoic acid]

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05/04/21

How many moles of an unknown compound must be dissolved in 100 mL of water to yield an osmotic pressure of 28.1 mmHg at 20 °C (assume the unknown has negligible volume)?
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05/04/21

percent by mass and percent by volume
A solution is formed by adding 50 g of potassium chloride to 450 g of water. What is the percent by mass of potassium chloride?
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05/04/21

Effect on Reaction Rate
I was told when O2 gas is added into this reaction, the reaction rate will increase.3H2(g) + N2 (g) ----> 2NH3 (g)Using collision theory to explain this, I assume these particles are in a... more
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05/04/21

Calculate the mass percent of 3.17 g KCl dissolved in 40.6 g H2O
Calculate the mass percent of solute in each solution
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05/04/21

Explain why the systematic name of Glutathione is gamma-glutamyl-L-cysteinylglycine
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05/04/21

What is the maximum mass of KCl that will dissolve in 100g of water at 10˚C?
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05/04/21

calculate the boiling point of 500 gram aqueous solution that contains 20% ethylene glycol (C2H6O2, a non volatille liquid) if the solvent is water
helppp, how to get its boiling point
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05/03/21

When 7.9 moles of [Co(NH3)5Cl]Cl2 is dissolved in water, how many moles of ions are in solution?
When 7.9 moles of [Co(NH3)5Cl]Cl2 is dissolved in water, how many moles of ions are in solution?
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05/03/21

Titration, how to find moles of an unknown acid?
I have the mL of the NaOH released from the burette, the molarity of it, and the grams of the solid substance. Is there a formula for how I find the moles of the unknown acid given these? What... more
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05/03/21

Li(s) + I2 (s) -->LiI(s) #1 Is the chemical equation above balanced? If not, then balance the chemical equation.

2.What type of reaction(s) is/are being represented by the chemical reaction for the lithium iodine battery? 3. Is the reaction for the lithium iodine battery above an oxidation-reduction... more
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05/03/21

Vapor pressure of a certain substance
A certain substance has a heat of vaporization of 33.31 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 291 K?
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05/03/21

Ionic Bonds/Covalent Intro
Draw the Lewis structure for the ionic compound that forms from Al and N.Please explain, too.
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05/03/21

Ionic Bonds/Covalent Intro
Draw the Lewis dot structure for CaI2. Please explain, too.
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05/03/21

The boiling point of an aqueous solution with NaCl is 101.02 ∘c. Calculate the molality concentration of the solution
pls help me answering this im quite confused
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05/03/21

In the laboratory you are asked to make a 0.112 m magnesium nitrate solution using 355 grams of water. How many grams of magnesium nitrate should you add?
In the laboratory you are asked to make a 0.112 m magnesium nitrate solution using 355 grams of water.How many grams of magnesium nitrate should you add?
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05/03/21

ch. 11 An aqueous solution is made by dissolving 20.3 grams of copper(II) acetate in 367 grams of water. The molality of copper(II) acetate in the solution is ___
ch. 11 An aqueous solution is made by dissolving 20.3 grams of copper(II) acetate in 367 grams of water.The molality of copper(II) acetate in the solution is ___
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05/03/21

1 Given the constants below, calculate how much energy in Joules would be required to change 100.0 g liquid water at 100oC into steam, also at 100oC. SHOW ALL WORK
Given the constants below, calculate how much energy in Joules would be required to change 100.0 g liquid water at 100oC into steam, also at 100oC.zoom_in
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05/03/21

Use Molar Concentrations to Calculate Ion Product/Compare to Ksp
20.00 mL of a 0.077 M solution of silver nitrate, AgNO3, is mixed with 30.00 mL of a 0.043 M solution of sodium acetate, NaC2H3O2. Does a precipitate form? The Ksp of AgC2H3O2 is 2.5*10^-3. Include... more
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05/02/21

) Determine the pH of the phosphate buffer containing 100 ml 0,1M KH2PO4 and 100 ml 0,3M Na2HPO4. K (H2PO4-)=1,67*10-7
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