05/16/20

Thermochemistry

Acetone (molar mass of 58.08 g/mol) is a common industrial solvent and has a heat of vaporization of +31.3 kJ/mol. If 1.0g of acetone is spilt, how much energy (in J) will it absorb as it... more
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05/16/20

Thermochemistry

The molar enthalpy of solution for ammonium chloride is +14.8 kJ/mol. What is the final temperature observed when 20.0g of ammonium chloride is added to 125 mL of water at 20.0°C . Give only the... more
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05/16/20

Thermochemistry

Acetone (molar mass of 58.08 g/mol) is a common industrial solvent and has a heat of vaporization of 31.3 kJ/mol. If 1.0g of acetone is spilt, how much energy will it absorb as it vaporizes, in kJ?... more
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05/16/20

Thermochemistry
A 100.0 mL volume of 1.0 mol/L hydrochloric acid was mixed with 100.0 mL of 1.0 mol/L sodium hydroxide at 23.5 °C in a coffee cup calorimeter. After the reactants mix, the temperature increases to... more
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05/16/20

Thermochemistry
Calculate the amount of energy required to raise the temperature of 10.5 g of iron from 25.2°C To 30.5°C. The specific heat capacity of iron is 0.444J/g°C Give the quantity and the unit (e.g. 3.5 cm). more
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05/16/20

Determine the concentrations
Determine the concentrations of BaBr2, Ba^2+, and Br− in a solution prepared by dissolving 2.91 × 10^−4 g BaBr2 in 2.00 L of water. Express all three concentrations in molarity. Additionally,... more
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05/16/20

Determine the concentrations

Determine the concentrations of BaBr2, Ba^2+, and Br− in a solution prepared by dissolving  × 10^−4 g BaBr2 in 2.00 L of water. Express all three concentrations in molarity. Additionally, express... more
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05/15/20

What is the pH?
What is the pH of the solution formed when 35 mL of 0.22 mol/L HCl are mixed with 55 mL of 0.15 mol/L Mg(OH)2.
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05/15/20

A solution with 4.17 g of a nonelectrolyte solute in 37 grams of water has a boiling point elevated by 1.20 degree C. What is the molar mass of the solute? (Kb= .51 degree C/m)
I understand most of this and I have a grasp on the material I just need a little assistance on this problem. Thank you!
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05/15/20

What is the Ksp?
If it takes 0.048 g BaF2 in 15.0 mL of water to make a saturate solution  of BaF2, calculate its Ksp.
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05/15/20

How much KI is needed to prepare 750 mL of a 0.250 M solution?
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05/15/20

The amount of salt that will dissolve in 100g of water at 50C is called the ?
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05/15/20

Ionic equation of Fe(NO3)3 + KSCN -> (Fe(SCN))?
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05/14/20

For any acidic or basic salts, ​complete the chemical equations​ that show how those substances react with water.
HCO​3-​ +H​2O⇋AndHC8H​4O​4-​ + H​2O⇋
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05/14/20

For any acidic or basic salts, ​complete the chemical equations​ that show how those substances react with water.
HCO​3-​ +H​O⇋ AndH8C4​H​4O​-​ + H​O⇋
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05/14/20

Develop a plan for making 1000 mL of a 5% by volume solution of sulfuric acid in water.

Develop a plan for making 1000 mL of a 5% by volume solution of sulfuric acid in water. Your plan should describe the amounts of solute and solvent necessary, as well as the steps involved in... more
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05/14/20

- If 600 mL of a Ba(OH) 2 solution are needed to neutralize 300 mL of a 4 M HC solution, what is the molarity of the Ba(OH) 2 solution?
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05/14/20

How many mL of 2.0 M Ca(OH) 2 are required to completely neutralize 100 mL of 4.0 M H3PO4
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05/14/20

HELP PLEASE! I need to find the molar mass!
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent.When 1.62 g of quinine is dissolved... more
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05/14/20

please help me with this question!
A solution is made by dissolving 0.559 mol of nonelectrolyte solute in 757 g of benzene. Calculate the freezing point, 𝑇f, and boiling point, 𝑇b, of the solution. Constants can be found in... more
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05/14/20

ΔHof for nitromethane
Nitromethane, CH3NO2, can be used as a fuel. When the liquid is burned, the (unbalanced) reaction is mainlyCH3NO2 (l) + O2 (g) à CO2 (g) + N2 (g) + H2O (g)a.) The standard enthalpy... more
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05/14/20

What is the pH of an aqueous solution with a hydroxide ion concentration of 1.8E–3 M?
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05/14/20

What is the hydrogen ion concentration of a solution with a pH = 8.25?

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05/14/20

What is the hydroxide ion concentration in an aqueous solution with a hydrogen ion concentration of 2.70E–2 M?

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05/13/20

A sample of oxygen gas occupies a volume of 230 cm3 at 101° C. What will be volume of oxygen when the temperature drops to - 15° C ?
Please explain how you got the answer, thank you
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