11/03/22

A 0.557 g sample of steam at 104.3 ∘C is condensed into a container with 5.66 g of water at 14.0 ∘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.
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11/03/22

A certain reaction has an activation energy of 34.04 kJ/mol. At what Kelvin temperature will the reaction proceed 5.50 times faster than it did at 315 K?
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11/03/22

The vapor pressure of ethanol, CH3CH2OH , at 35.0 °C is 13.67 kPa . If 2.14 g of ethanol is enclosed in a 2.50 L container, how much liquid will be present?
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11/03/22

A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 257.0 Torr at 45.0 ∘C.
Calculate the value of Δ𝐻∘vapΔ⁢Hvap∘ for this liquid. Calculate the normal boiling point of this liquid.
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11/03/22

If a plant produces 7.91 moles of c6h12o6. How many moles of H2O are needed?
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11/03/22

Determine the equilibrium constant?
Determine the equilibrium constant for a reaction at 200.0 K if ∆G° =-13.00 kJ/mol. (R = 8.314 J/mol ･ K)
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11/03/22

What's the atm of gas remaining?
Solid ammonium chloride, NH4Cl, is formed by the reaction of gaseous ammonia, NH3, and hydrogen chloride, HCl. NH3(g) + HCl(g) ⟶ NH4Cl(s)A 6.88 g sample of NH3 gas and a 6.88 g sample... more
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11/03/22

What is the solution?
Arrange these elements according to electron affinity.You are currently in a ranking module. Turn off browse mode or quick nav, Tab to move, Space or Enter to pick up, Tab to move items between... more
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11/02/22

College Chemistry Homework Help
A 76.0 mL solution of 0.200 M of AgNO3 reacts with 180.0 mL solution of 0.351M of NaCl to produce silver chloride (AgCl) and sodium nitrate (NaNO3) according to the balanced... more
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11/02/22

Two 20.0 g ice cubes at −10.0 ∘C are placed into 265 g of water at 25.0 ∘C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature, 𝑇f, of the water

heat capacity of H2O(s)37.7 J/(mol⋅K)heat capacity of H2O(l)75.3 J/(mol⋅K)enthalpy of fusion of H2O6.01 kJ/mol
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11/02/22

Predict the standard potential for the galvanic cell consisting of a...
Predict the standard potential for the galvanic cell consisting of a platinum anode in a chromium(II) and chromium (III) ion solution with a copper cathode in a copper(II) ion solution. Refer to... more
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11/02/22

What is the solubility?
What is the solubility of Cr(OH)₃ at a pH of 10.00? (Ksp Cr(OH)₃ is 6.70 × 10⁻³¹)
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11/02/22

Chemistry Question
The [OH–] in an aqueous solution is 4.0×10-6 M. Find the [H+].
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11/02/22

Chem question help
Separate the redox reaction into its component half‑reactions.O2+4Li⟶2Li2OUse the symbol e− for an electron.oxidation half-reaction:reduction half-reaction:O2+4e-->2O-2
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11/02/22

Need help with this question
The quantity of antimony in an ore can be determined by an oxidation‑reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so... more
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11/02/22

Please help with this

Alka‑Seltzer is marketed as a remedy for stomach problems, such as heartburn or indigestion, and pain relief. It contains aspirin, sodium bicarbonate, and citric acid, and is effervescent when... more
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11/02/22

What mass of AgBr?
What mass of AgBr will dissolve in 500.0 mL of 5.30 M NH₃? Ksp for AgBr is 5.0 × 10⁻¹³. For the reaction Ag⁺(aq) + 2NH₃(aq) ⇌ Ag(NH₃)₂⁺(aq) K = 1.7 × 10⁷.
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11/01/22

What is the minimum mass?
What is the minimum mass of Mg(NO₃)₂ that must be added to 1.00 L of a 0.210 M HF solution to begin precipitation of MgF₂(s)? For MgF₂, Ksp = 7.4 × 10⁻⁹, and Ka for HF = 7.2 × 10⁻⁴.
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11/01/22

The Haber reaction for the manufacture of ammonia is: N2 + 3H2 → 2NH3 Without doing any experiments, which of the following can you say MUST be true?

True/ False The activation energy is positive. True/ False Disappearance rate of N2 = 3 (Disappearance rate of H2). True/ False The reaction is first order in N2. True/ False Disappearance... more
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11/01/22

A gas is composed of 30.4%N and 69.6%O. Its density is 11.1 g/L at -20°C and 2.50 atm. What are the empirical and molecular formulas of the gas?
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11/01/22

A 1.00 g sample containing CaCO3 liberates 0.220 g of CO2 upon treatment with excess HCl. Calculate % CaCO3 and % Ca in the sample.
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11/01/22

Chemistry Pressure to Energy.
Calculate the internal energy (in Joules) of a system that loses 174.0 J that is compressed with a pressure of 3.77 atm from 13.51 L to 1.00 L.
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11/01/22

A sample of 7.64 g of liquid 1‑propanol, C3H8O, is combusted

A sample of 7.64 g of liquid 1‑propanol, C3H8O, is combusted with 61.3 g of oxygen gas. Carbon dioxide and water are the products.Write the balanced chemical equation for the reaction. Physical... more
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11/01/22

An aqueous containing

An aqueous solution containing 8.31 g of lead(II) nitrate is added to an aqueous solution containing 6.41 g  of potassium chloride.Enter the balanced chemical equation for this reaction. Be sure to... more
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10/31/22

writing a balanced complete ionic equation for the acid-base reaction with the weak acid, acetic acid
Enter the balanced complete ionic equation for the acid-base reaction with the weak acid, acetic acidHC2H3O2(aq)+LiOH(aq)→Express your answer as a chemical equation including phases.
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