J.R. S.

Chemistry

10/06/20

When 1337 J of heat energy is added to 39.8 g of ethanol, C2H6O, the temperature increases by 13.7 ∘C. Calculate the molar heat capacity of C2H6O.

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Chemistry

10/06/20

A 57.73 g sample of a substance is initially at 20.0 °C. After absorbing 1143 J of heat, the temperature of the substance is 169.6 °C. What is the specific heat ( 𝑐 ) of the substance?

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Answers •1

Chemistry

10/06/20

what is difference between solute and solvent?????????????????????????//give answer

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Answers •3

Chemistry

10/06/20

How many mL of 0.512 M HCl are needed to dissolve 5.42 g of BaCO3? 2HCl(aq) + BaCO3(s) BaCl2(aq) + H2O(l) + CO2(g)

How many mL of 0.512 M HCl are needed to dissolve 5.42 g of BaCO3? 2HCl(aq) + BaCO3(s) BaCl2(aq) + H2O(l) + CO2(g)2.Calculate the number of milliliters of 0.425 M NaOH required to precipitate all... more

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Chemistry Biochemistry Organic Chemistry

10/06/20

What will be the final temperature of the Aluminum bar and of the water once thermal equilibrium is achieved ?

A 10.0 g bar of aluminum initially at is placed in 100.mL of water initially at . What will be the final temperature of the Aluminum bar and of the water once thermal equilibrium is achieved ?... more

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Chemistry Biochemistry Organic Chemistry

10/06/20

Calculate the heat gained by the water if the final equilibrium temperature is 57.8 °C.

A 1.5 g iron nail is heated to 95.0 °C and placed into a beaker of water. Calculate the heat gained by the water if the final equilibrium temperature is 57.8 °C. The specific heat of iron = 0.449... more

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Chemistry Biochemistry Organic Chemistry

10/06/20

Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.

Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.Assume the specific heat capacity of ethanol under these conditions is ·2.44J·g−1K−1.Be sure your answer has the correct... more

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Chemistry

10/06/20

Which of the following is the net ionic equation for the reaction between aqueous sodium fluoride and hydrochloric acid?

a. NaF(aq)+HCl(aq)→NaCl(aq)+HF(aq)b. Na+(aq)+F−(aq)+H+(aq)+Cl−(aq)→Na+(aq)+Cl−(aq)+HF(aq)c. Na+(aq)+Cl−(aq)→NaCl(aq)d. F- (aq)+H+(aq)→HF(aq)

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Chemistry Biochemistry Organic Chemistry

10/06/20

What is the final temperature of 10.0g of water initially at C after absorption of 100.J of heat?

What is the final temperature of 10.0g of water initially at C after absorption of 100.J of heat? The specific heat of water is 4.184 J/g C.

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Chemistry Biochemistry Organic Chemistry

10/06/20

Calculate the energy required to heat 701.0mg of silver from −0.8°C to 8.9°C.

Calculate the energy required to heat 701.0mg of silver from −0.8°C to 8.9°C. Assume the specific heat capacity of silver under these conditions is ·0.235J·g−1K−1.Be sure your answer has the... more

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Chemistry

10/06/20

How many milliliters of 0.130 M HCl are needed to completely neutralize 60.0 mL of 0.100 M Ba(OH)2 solution? Express the volume in milliliters to three significant digits.

must answer with 3 sig figs

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Chemistry Biochemistry Organic Chemistry

10/06/20

What can the chemist report for the specific heat capacity of the substance?

Hello, I'm so confused on this question, can I please have a detailed explanation?A chemist carefully measures the amount of heat needed to raise the temperature of a 261.0mg sample of a pure... more

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Chemistry Biochemistry Organic Chemistry

10/06/20

What can the chemist report for the specific heat capacity of the substance?

A chemist carefully measures the amount of heat needed to raise the temperature of a 261.0mg sample of a pure substance from 2.8°C to 19.5°C. The experiment shows that 0.606J of heat are needed.... more

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Chemistry

10/06/20

0.914 g of CaCO3 heated CaCO3→CaO+ CO2. The gas was sealed 225 mL container over water at 25.0°C the pressure141.4 torr. The vapor pressure of water at 25.0°C is 23.8 torr.

A 0.914 g sample of a mixture of calcium carbonate and an inert impurity is heated strongly until the calcium carbonate fully decomposes according to the reaction below:CaCO3 (s) → CaO (s) +... more

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Chemistry Biochemistry Organic Chemistry

10/06/20

What can the chemist report for the specific heat capacity of the substance?

A chemist carefully measures the amount of heat needed to raise the temperature of a 754.0g sample of a pure substance from 2.1°C to 20.2°C. The experiment shows that 9.69kJ of heat are... more

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Chemistry

10/06/20

Equilibrium constant

Write K for this equilibrium: H2O (l) <-> H2O (g)Is my answer correct?K = [H2O(g)]Liquids, like water, are not counted when writing equilibria constants.

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Chemistry Biochemistry Organic Chemistry

10/06/20

What can the chemist report for the specific heat capacity of the substance?

A chemist carefully measures the amount of heat needed to raise the temperature of a 442.0mgsample of a pure substance from 52.4°C to 66.4°C. The experiment shows that 25.9J of heat are needed.What... more

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Answers •2

Chemistry Organic Chemistry

10/06/20

A student added 1.2 g of magnesium turnings to 100 ml of 1M HCl in a styrofoam cup calorimeter. The initial temperature of HCl was 24C and the final temperature of the solution was 50C What is the q?

Calculate the enthalpy of reaction

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Chemistry

10/06/20

Complete combustion of 7.40 g of a hydrocarbon produced 22.8 g of CO2 and 10.5 g of H2O. What is the empirical formula for the hydrocarbon?

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Chemistry

10/06/20

An unknown compound contains only C , H , and O . Combustion of 5.60 g of this compound produced 13.7 g CO2 and 5.60 g H2O . What is the empirical formula of the unknown compound?

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Chemistry

10/06/20

On another planet, the isotopes of titanium have the given natural abundances.What is the average atomic mass of titanium on that planet?

On another planet, the isotopes of titanium have the given natural abundances. IsotopeAbundanceMass (u) 46Ti 75.200% 45.95263 48Ti 10.900% 47.94795 50Ti 13.900% 49.94479 What is the... more

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Chemistry

10/05/20

How many liters at STP are in 112 grams of O2 gas?

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Chemistry

10/05/20

Acid and Base PH and Ionization Percent

Calculate the percent ionization of 0.120 M lactic acid in a solution containing 8.5×10−3 M sodium lactate.

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Chemistry

10/04/20

Daltons Law and Water

Hi!I have a question, I read somewhere that...When a reaction is exothermic, and you wish to use Daltons Law, you must take into consideration the partial pressure of water vapor.ptotal=... more

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Chemistry

10/04/20

According to the following reaction, how many grams of oxygen gas are necessary to form 0.289 moles carbon dioxide?

propane (C3H8) (g) + oxygen (g) carbon dioxide (g) + water (g)

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Answers •2

When 1337 J of heat energy is added to 39.8 g of ethanol, C2H6O, the temperature increases by 13.7 ∘C. Calculate the molar heat capacity of C2H6O.

A 57.73 g sample of a substance is initially at 20.0 °C. After absorbing 1143 J of heat, the temperature of the substance is 169.6 °C. What is the specific heat ( 𝑐 ) of the substance?

what is difference between solute and solvent?????????????????????????//give answer

How many mL of 0.512 M HCl are needed to dissolve 5.42 g of BaCO3? 2HCl(aq) + BaCO3(s) BaCl2(aq) + H2O(l) + CO2(g)

What will be the final temperature of the Aluminum bar and of the water once thermal equilibrium is achieved ?

Calculate the heat gained by the water if the final equilibrium temperature is 57.8 °C.

Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.

Which of the following is the net ionic equation for the reaction between aqueous sodium fluoride and hydrochloric acid?

What is the final temperature of 10.0g of water initially at C after absorption of 100.J of heat?

Calculate the energy required to heat 701.0mg of silver from −0.8°C to 8.9°C.

How many milliliters of 0.130 M HCl are needed to completely neutralize 60.0 mL of 0.100 M Ba(OH)2 solution? Express the volume in milliliters to three significant digits.

What can the chemist report for the specific heat capacity of the substance?

What can the chemist report for the specific heat capacity of the substance?

0.914 g of CaCO3 heated CaCO3→CaO+ CO2. The gas was sealed 225 mL container over water at 25.0°C the pressure141.4 torr. The vapor pressure of water at 25.0°C is 23.8 torr.

What can the chemist report for the specific heat capacity of the substance?

Equilibrium constant

What can the chemist report for the specific heat capacity of the substance?

A student added 1.2 g of magnesium turnings to 100 ml of 1M HCl in a styrofoam cup calorimeter. The initial temperature of HCl was 24C and the final temperature of the solution was 50C What is the q?

Complete combustion of 7.40 g of a hydrocarbon produced 22.8 g of CO2 and 10.5 g of H2O. What is the empirical formula for the hydrocarbon?

An unknown compound contains only C , H , and O . Combustion of 5.60 g of this compound produced 13.7 g CO2 and 5.60 g H2O . What is the empirical formula of the unknown compound?

On another planet, the isotopes of titanium have the given natural abundances.What is the average atomic mass of titanium on that planet?

How many liters at STP are in 112 grams of O2 gas?

Acid and Base PH and Ionization Percent

Daltons Law and Water

According to the following reaction, how many grams of oxygen gas are necessary to form 0.289 moles carbon dioxide?

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