02/07/22

Answers of the description
Given: 150.0 mL of 0.130 hydrobromic acid (HBr)0.0200 barium hydroxide (Ba(OH)2)Wanted; mL of 0.0200 Ba(OH)2 necessary to neutralize HBr?
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02/07/22

Liquid octane (CH3(CH2)6 (CH3) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O).

If 8.68g of water is produced from the reaction of 29.7g of octane and 43.7g of oxygen gas, calculate the percent yield of water. Round your answer to 3 significant figures.= ____ %
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02/07/22

The vapor pressure of ethanol, CH3CH2OH , at 40.0 °C is 17.88 kPa . If 2.05 g of ethanol is enclosed in a 3.00 L container, how much liquid will be present?
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02/07/22

A 0.579 g sample of steam at 103.5 ∘C is condensed into a container with 4.79 g of water at 14.3 ∘C. What is the final temperature of the water mixture if no heat is lost?

The specific heat of water is 4.18 J g⋅ ∘C, the specific heat of steam is 2.01 J g⋅ ∘C, and Δ𝐻vap=40.7 kJ/mol.
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02/07/22

A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 274.0 Torr at 45.0 ∘C.
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02/07/22

A chemical reaction is run in which 596 Joules of work is done on the system and the internal energy changes by + 966 Joules. Calculate q for the system.
A chemical reaction is run in which 596 Joules of work is done on the system and the internal energy changes by + 966 Joules.Calculate q for the system.
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02/06/22

Limiting Reactants
1. If 132.0 grams of copper(II) chloride reacts with 160.0 grams of sodium nitrate, how many grams of sodium chloride can be formed?c. What is the limiting reactant of this reaction? d. How many... more
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02/06/22

A gas has a solubility in water of 14.8 g/L at 19°C and 607 kPa of pressure. What is its solubility in water at 14°C and 706 kPa of pressure?

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02/06/22

Aqueous sulfuric acid (H2SO4) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium sulfate (Na2SO4) and liquid water (H2O).
If 3.23g of sodium sulfate is produced from the reaction of 2.9g of sulfuric acid and 3.3g of sodium hydroxide, calculate the percent yield of sodium sulfate. Round your answer to 2 significant... more
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02/06/22

molecular and empirical formula

Hydrocarbons are organic compounds that are made up of only carbon and hydrogen atoms. A hydrocarbon was found to contain 84.63% of carbon by mass. Determine the empirical and the molecular formula... more
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02/06/22

The boiling point of an aqueous solution is 101.13 ∘C. What is the freezing point?

Consult the table of colligative constants.freezing point: ___°C
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02/06/22

The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 3.2 cm by 2.7 cm by 12.7 cm
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02/06/22

Chemistry 101 help
A sample of solid iodine is heated with an electrical coil. If 19.2 calories of energy are added to a 12.4 gram sample and the final temperature is 38.8°C, what was the initial temperature of... more
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02/05/22

For the following reaction, 5.05 grams of potassium hydroxide are mixed with excess potassium hydrogen sulfate. The reaction yields 13.3 grams of potassium sulfate.
For the following reaction, 5.05 grams of potassium hydroxide are mixed with excess potassium hydrogen sulfate. The reaction yields 13.3 grams of potassium sulfate.KHSO4 (aq) + KOH (aq)  K2SO4 (aq)... more
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02/05/22

The rate constant for a first order reaction is 4.60 x 10-4 s -1 at 350°C. If the activation energy is 104 kJ mol-1 , calculate the temperature at which its rate constant is 5.28 x 10-2 min-1
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02/05/22

Calculate the equilibrium constant at 453 K for the following chemical equilibrium
CO (g) + H2O (g) ⇄ CO2 (g) + H2 (g)
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02/05/22

Bovine serum albumin (BSA) is a biochemically useful protein. A 0.400 g sample of bovine serum albumin is dissolved in water to make 0.179 L of solution
the osmotic pressure of the solution at 25 ∘C is found to be 0.835 mbar. Calculate the molecular mass of bovine serum albumin
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02/05/22

When 11.1 g of an organic compound known to be 55.81% C , 7.0% H , and 37.17% O by mass is dissolved in 909.6 g of benzene, the freezing point is 5.01 ∘C .

The normal freezing point is 5.49 ∘C . What is the molecular formula for the organic compound?
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02/05/22

There are four oxygen acids in which the chlorine atom has oxidation numbers I, III, and VII. Write the names and formulas of their calcium salts.?
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02/05/22

equation of the chemical reaction taking place in the removal of rust with sofic acid?
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02/05/22

Number of moles in 9 g of carbon

Option 0.25 0.500.750.95
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02/05/22

Chemistry - prepare a solution
Chemist Samo wants to prepare a 100 cm³ solution of sodium chloride with a concentration of c (NaCl) = 0.500 mol / dm³. In the periodic table, he found that the molar mass of Na is 23.0 g / mol... more
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02/05/22

Chemistry - molar mass
parameters of TurboJoda elixir for master Yoda entered: 1. TurboJoda elixir is an aqueous solution of potassium iodate. 2. The daily dose of potassium iodate for Yoda is exactly 90 mg. 3. The... more
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02/05/22

chemical reactions
Decide whether the following substances will react together. If so, write the equations of the chemical reactions. 1. bromine and potassium iodide 2. chlorine and potassium fluoride
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02/04/22

If the final temperature of the water and metal is 58.4 ∘C , what is the specific heat of the metal? Express your answer in J/(g⋅∘C) using three significant figures.
A 127 g piece of metal is heated to 286  ∘C and dropped into 90.0 g of water at 26.0 ∘C.
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