02/02/22

A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 274.0 Torr at 45.0 ∘C.
Calculate the value of Δ𝐻∘vap for this liquid.Δ𝐻∘vap=____ kJ/mol Calculate the normal boiling point of this liquid. boiling point:____ ∘C
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02/02/22

What is the correct set up for this problem?
1 Fe2O3 (s) + 6 HCl (g) --> 2 FeCl3 (s) + 3 H2O (g)How many grams of HCl are needed to react with 27.62 g of Fe2O3?-----------------------------------------------------= 37.29 g HCl
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02/02/22

Use the following balanced equation to solve the problems below:
1 Fe2O3 (s) + 6 HCl (g) --> 2 FeCl3 (s) + 3 H2O (g)How many grams of FeCl3 can be produced using 0.295 mol Fe2O3?
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02/01/22

I need with this equilibrium question. I keep getting a negative concentration for C.
A mixture of gases A, B, and C were placed into a 1.00 L container. 10.00 moles of each of the three gases were used to create the mixture. The mixture was then allowed to reach equilibrium at a... more
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02/01/22

chap 10 chem AM
If the molar heat capacity of 1.00 M HCl is the same as that for water [cP = 75.3 J/(mol∙°C)], what is ΔHrxn?
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02/01/22

According to the nutrition label, a mass-produced high-fiber blueberry muffin contains 15(m/m)% dietary fiber. What mass of fiber is in a single muffin if a 16oz package contains six muffins?1

This is a dimensional analysis problem. This needs to have significant figures and the correct units.
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02/01/22

A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 274.0 Torr at 45.0 ∘C. Calculate the value of Δ𝐻∘vap for this liquid. Δ𝐻∘vap= 38.8 kJ/mol
Calculate the normal boiling point of this liquid.boiling point: ___ ∘C
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02/01/22

A water heater contains 54 gal of water. How many kilowatt hours of energy are necessary to heat the water in the water heater by 25° C

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02/01/22

Calculate the amount of heat required to raise the temperature of a 99 g sample of water from 36° C to 69 ° C

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01/31/22

Gas Laws Problems

a gas occupies 800 ml at a temperature of 30 degrees C.What is the volume at 90 degrees C if the pressure remains stable
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01/31/22

write the mole ratio for each of the following balanced chemical equations

1) N2 + 3H2 —> 2NH32) Zn + 2HCl —> ZnCl2 + H23) 2Al + 3S —> Al2 S3
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01/31/22

In the iodine clock reaction system, how does the initial concentration of iodate ions affect the rate and/or the sequence of the first two reactions?
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01/31/22

A 127 g piece of metal is heated to 282 ∘C and dropped into 90.0 g of water at 26.0 ∘C. If the final temperature of the water and metal is 57.5 °C, what is the specific heat of the metal?
express the answer in J/(g•°C) using three significant figures
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01/31/22

Enthalpy for chemistry class
A 0.598 g sample of steam at 106.0 ∘C is condensed into a container with 5.78 g of water at 16.6 ∘C. What is the final temperature of the water mixture if no heat is lost? The specific heat... more
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01/30/22

H 2(g) + Cl 2(g) ↔ 2HCl (g) K = 4.4 x 10 -2 at 0 ̊C
Initially, 1.5 mol of hydrogen and 1.5 mol of chlorine are injected into a 0.75 L refrigerated reaction vessel cooled to 0 ̊C. a) Find the concentrations of H 2 , Cl 2 and HCl at equilibrium.b)... more
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01/30/22

analytical chemistry
A solution was prepared by dissolving 0.05 mole of HCl, 0.005 mole of KCl, 0.045 mole of NaNO3 and 0.025 mole of NaOH in water to give a solution of final volume 1 dm3. (i) Calculate the ionic... more
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01/30/22

CHEMISTRY ANSWER!!!!
The distance from the sun to the earth is 1.50 x 10^8 km. The speed of light is 3.00 x10 ^8m/s. How many round trips between Earth and the sun could a beam of light make in one day?
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01/29/22

Draw a complete structural formula for the following compound. In a structural formula, all atoms and bonds are shown. 2−Nonanol
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01/29/22

Draw a complete structural formula for the following compound. In a structural formula, all atoms and bonds are shown. 4−Methyl−2−hexanol
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01/29/22

Observe the equilibrium reaction below: CO (g) + H 2 O (g) ↔ CO 2(g) + H 2(g) K = 4.00 at 900 ̊C

If the following concentrations are introduced into a reaction vessel, in which direction would the reaction proceed to establish equilibrium? Show your work. [CO] = 8.00 mol/L[CO 2 ] = 8.00... more
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01/29/22

Chemistry moles, molecules, ions, and molarity question
A solution containing 50.8 g of sodium sulfate in a volume of 0.558 L was prepared. Calculate the number of moles of sodium sulfate in this solution. Calculate the number of molecules of sodium... more
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01/29/22

Aspirin is a compound with the molecular formula C9H89O4. what is it's percentage composition?
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01/29/22

Aspirin is a compound with the molecular formula C9H89O4. what is it's percentage composition?
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01/29/22

Dichloroethane, a compound dat is often used 4 dry cleaning, contain carbon, hydrogen and chloride. It has mola mas of 99g/mol. Analysis of simple show dat is contain 24.3% carbon and 4.1% hydrogen
Dichloroethane, a compound that is often used for dry cleaning, contain carbon, hydrogen and chloride. It has a molar mass of 99g/mol. Analysis of a simple show that is contain 24.3% carbon and... more
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01/29/22

A 0.577 g sample of steam at 103.6 ∘C is condensed into a container with 5.58 g of water at 17.0 ∘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.Answer:... more
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