25,963 Answered Questions for the topic chemistry

Chemistry

03/21/23

Equilibrium constant
Use the following reactions and their equilibrium constants to predict the equilibrium constant for this reaction: 2 A(s) ↔ 3 D(g).A(s) ↔ 1⁄2 B(g) + C(g) K1 = 0.03343D(g)↔B(g)+2C(g) K2 =2.35
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Chemistry

03/21/23

Chemisry question

Consider a galvanic cell based on the half reactions:𝐹𝑒2 + (π‘Žπ‘ž) + 2𝑒 ― →𝐹𝑒 (𝑠) πΈΒ°π‘Ÿπ‘’π‘‘ = ―0.447 𝑉2𝐻 + (π‘Žπ‘ž) + 2𝑒 ― →𝐻2 (𝑔) πΈΒ°π‘Ÿπ‘’π‘‘ = 0.000 𝑉The iron compartment contains an iron electrode in a solution... more
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Chemistry

03/21/23

In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.
MnO4-Β +Β 5NO2+ H2O5NO3-Β +Β Mn2++ 2H+ In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of... more
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Chemistry

03/21/23

IDEAL GAS LAW EQUATION
0.465 MOLE SAMPLE OF GAS EXERTS 4.43 ATM OF PRESSURE IN 2.25 L CONTAINER. WHAT IS TEMPERATURE OF THE GAS IN THE CONTAINER? A GAS HAS PRESSURE OF 0.410 ATM A VALUME 32L AT WHAT PRESSURE WOULD THE... more
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Chemistry

03/21/23

Equilibrium questions
Phosphorus trichloride gas and chlorine gas react to form phosphorus pentachloride gas: PCl3(g) + Cl2(g) ↔ PCl5(g). A 7.5L gas vessel is charged with a mixture of PCl3(g) and Cl2(g), which is... more
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Chemistry

03/21/23

Calculate equilibria constant
The following equilibria were attained at 823K: CoO(s) + H2(g) ↔ Co(s) + H2O(g) CoO(s) + CO(g) ↔ Co(s) + CO2(g) Based on these equilibria, calculate the equilibrium constant for H2(g) + CO2(g) ↔... more
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Chemistry

03/21/23

Calculate the H3O + concentration at the halfway point when 38.8 mL of 0.15 M HBr is titrated with 0.1 M KOH. Assume additive volumes. Answer in units of M
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Chemistry

03/21/23

Chemistry Question

How many atoms are in primitive cubic unit cell (simple cubic unit), Body Centered cubic unit cell, Face centered cubic unit cell.Iron solid adopts a body-centered cubic structure with a unit cell... more
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Chemistry

03/21/23

If you start with 5.0 grams each of hydrogen gas and oxygen gas, how many grams of water are produced?
2H2 + O2 ----> 2H2O
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Chemistry Science Act Science

03/20/23

Question about Li2CO3
How do you get Li2CO3 from an ore containing LiCl. What are the exact ways to extract Li2CO3 in this way? And secondly, after you extract Li2CO3, how do you prove/make sure it is Li2CO3 (any... more
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Chemistry

03/20/23

How many milliliters of 5.50 M HCl(aq) are required to react with 3.05 g Zn(s)?
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Chemistry

03/20/23

Equilibrium and using ICE tables
Solid Ca₃(POβ‚„)β‚‚ is placed into 10.0 L of water. When equilibrium is established, the concentration of Ca²⁺ is 2.3 Γ— 10⁻⁴ M. What is Kc for this equilibrium? Note Kc is sometimes called K. Ca₃(POβ‚„)β‚‚... more
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Chemistry

03/20/23

Equilibrium and using ICE tables
For the reaction below, Kc = 4.60 Γ— 10⁻⁢. Note Kc is sometimes called K. What is the equilibrium concentration of B if the reaction begins with 0.700 M A? A (g) β‡Œ 3 B (g)
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Chemistry

03/20/23

Equilibrium and using ICE tables
For the reaction below, Kc = 1.10 Γ— 10⁻⁴. Note Kc is sometimes called K. What is the equilibrium concentration of C if the reaction begins with 0.200 M A and 0.400 M B? 2 A (aq) + B (aq) β‡Œ C (aq)
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Chemistry

03/20/23

Equilibrium and using ICE tables
An empty steel container is filled with 0.0400 atm of HF. The system is allowed to reach equilibrium. If Kp = 2.76 for the reaction below, what is the equilibrium partial pressure of Hβ‚‚? 2 HF (g) β‡Œ... more
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Chemistry

03/20/23

Consider the titration of 30.0 mL of 0.251 M weak base B (Kb = 1.3 x 10⁻¹⁰) with 0.150 M HI. What is the pH of the solution at the equivalence point?
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Chemistry

03/20/23

Consider the titration of 30.0 mL of 0.251 M weak base B (Kb = 1.3 x 10⁻¹⁰) with 0.150 M HI. What would be the pH of the solution after the addition of 20.0 mL of HI?
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Chemistry

03/19/23

Equilibrium and using ICE tables
For the reaction 2 NOβ‚‚(g) β‡Œ 2 NO(g) + Oβ‚‚(g) Kp = 1.11 Γ— 10⁻⁡ at 200 Β°C. A 2.50 L vessel at 200 Β°C is filled with NOβ‚‚(g) at an initial pressure of 4.00 atm and allowed to come to equilibrium. What... more
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Chemistry

03/19/23

fill in the ice table, find the Ka, and the mass of NaCH3COO
sodium acetate is added to an existing 500 ml solution of .200 M CH3COOH to form a buffer with a pH equal to 5.000. let x represent the concentration of CH3COO- in the water after the addition of... more
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Chemistry

03/19/23

Rinsing electrodes for pH and Conductivity meter
Can we use ultra pure water to rinse the electrodes of pH and conductivity meter? All the methods points towards distilled/deionized water.
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Chemistry

03/19/23

Chemistry - acid/base
Assume there are aqueous solutions of the same concentrations. Please place the following compounds in order of increasing pH. K2HPO4, H3AsO4, LiHSO3, NaHC2O4, C6H5N, C2H5NH3NO3, NH4ClO4I think I... more
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Chemistry

03/19/23

General chemistry
An ideal gas sample had a volume of one liter at sea-level conditions of 1.01bar and 18β€’c. As the gas enters the atmosphere,500km above the sea-level,the volume increased to 3.5Γ—1011litres at a... more
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Chemistry

03/19/23

Can I ask this multiple choice Chemistry question
In the Contact process for the production of sulphuric acid, sulphur dioxide is mixed with air and passed over a vanadium(V) oxide catalyst at about 450 Β°C and a pressure slightly above atmospheric... more
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Chemistry

03/19/23

Chemistry 2 chapter 13 or 14 question
A 4.17 ppm solution of BaCl2 in water has a density of 1.24 g/mL. What is the molarity?
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Chemistry

03/19/23

Chemistry 2 chapter 13 question

A solution of NaCl in water has molality of 1.55. What is a mole fraction Xnacl.
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