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What is the aromaticity of the nitrogen-containing heterocyclic compound pyridine? How does it differ from the aromaticity of benzene?

asked Jan 21 in Organic Chemistry by StanGjo3033 (1.9k points)

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What is the specific configuration (R or S) of the chiral center in the molecule shown below? Hint: Use the Cahn-Ingold-Prelog priority rules to assign priorities to the substituents attached to the chiral center and determine the direction of rotation needed to align the priorities from highest to lowest.

asked Jan 21 in Organic Chemistry by MagdaMeares (1.8k points)

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How many stereoisomers are possible for a compound with the molecular formula C<sub>4</sub>H<sub>9</sub>Br if it contains one chiral carbon atom?

asked Jan 21 in Organic Chemistry by SusannahCrow (2.4k points)

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1 answer 77 views

A sealed vessel contains a mixture of nitrogen dioxide and dinitrogen tetraoxide gases in equilibrium. If the volume of the container is increased, would the equilibrium shift towards more or less NO2? Calculate the new equilibrium constant at the new volume assuming the pressure and temperature remain constant.

asked Jan 22 in Chemical equilibrium by KreogMoore5 (6.4k points)

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1 answer 85 views

A chemistry lab has 20 grams of magnesium and 30 grams of hydrochloric acid. What is the exact amount (in grams) of magnesium chloride that will be produced in a complete reaction between magnesium and hydrochloric acid?

asked Jan 22 in Chemical reactions by VickeyBatema (1.9k points)

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What is the molecular formula of benzene and what is the difference between the resonance structures of benzene?

asked Jan 21 in Organic Chemistry by FranziskaEve (1.9k points)

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What products are formed from the electrophilic addition reaction between propene and hydrogen bromide?

asked Jan 21 in Organic Chemistry by CorneliusChi (1.6k points)

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1 answer 71 views

Assume a reaction where magnesium (Mg) reacts with chlorine (Cl2) to produce magnesium chloride (MgCl2). If we start with 10 grams of magnesium and 20 grams of chlorine, what mass of magnesium chloride can we produce?

asked Jan 22 in Chemical reactions by UweEales0685 (1.8k points)

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1 answer 85 views

A chemist analyzed a sample of unknown substance and found that it contains 55% carbon, 9.17% of hydrogen and the rest of the mass is oxygen. What is the percentage by mass of oxygen in the sample?

asked Jan 22 in Analytical Chemistry by GracieGainfo (2.2k points)

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1 answer 71 views

Analyzing the presence and concentration of heavy metals in landfill leachate and determining their impact on groundwater quality: A case study in a selected landfill site.

asked Jan 22 in Environmental Chemistry by EvieMerideth (2.3k points)

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1 answer 28 views

Calculate the heat of mixing when 100 mL of 0.2 M HCl is mixed with 100 mL of 0.1 M NaOH, assuming that the density of the resulting solution is 1 g/mL and the specific heat capacity is 4.18 J/g℃.

asked Jan 23 in ThermoChemistry by MargueriteWa (1.8k points)

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A student sets up an electrochemical cell with two copper electrodes and a copper(II) sulfate solution. The concentration of the copper(II) sulfate solution is 0.1 M. The student measures the potential difference between the electrodes as 0.54 V. Calculate the resistance of the cell in ohms.

asked Jan 22 in ElectroChemistry by LeathaOchoa (1.7k points)

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What are the products of the reaction between an alcohol and a carboxylic acid, and what is this reaction called?

asked Jan 21 in Organic Chemistry by KassieStarns (2.3k points)

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1 answer 118 views

Identify the functional group and write the reaction mechanism for the following reaction: ethanoic acid reacts with sodium hydroxide to form sodium ethanoate and water.

asked Jan 21 in Organic Chemistry by SilviaTorpy5 (2.1k points)

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1 answer 79 views

A chemistry student wants to determine the effect of temperature on the ionization constant (Ka) of a weak acid. The initial Ka of the acid is 1.32 × 10^-6 at 25°C. If the temperature is increased to 35°C, calculate the new value of Ka for the weak acid.

asked Jan 22 in Chemical equilibrium by Benjamin55Q0 (2.1k points)

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1 answer 78 views

A compound containing only potassium and chlorine has a mass of 74.55 grams. When this compound was analyzed, it was found to have 37.43 grams of potassium and 37.12 grams of chlorine. Determine the empirical and molecular formulas of this compound.

asked Jan 22 in Inorganic Chemistry by Phillipp6306 (2.1k points)

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1 answer 114 views

What is the pH of a solution containing 0.1 M HCl and 0.05 M NaOH?

asked Jan 21 in Inorganic Chemistry by PalmaYuille (2.1k points)

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1 answer 114 views

What is the solubility of copper(II) sulfate pentahydrate in water at 25°C?

asked Jan 21 in Inorganic Chemistry by FelicitasVas (2.1k points)

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Assuming that a 0.1 M solution of NH4Cl is at equilibrium with its own ions and NH3 in a closed vessel at 25°C. Calculate the effects on the equilibrium position when solid NH4Cl is added to the solution, and the final concentration of NH4+ and NH3 ions in the solution.

asked Jan 22 in Chemical equilibrium by Reuben64X571 (2.3k points)

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1 answer 83 views

A chemistry student needs to analyze a water sample to determine the concentration of a certain contaminant. The student knows the initial concentration of the contaminant in the source water and the volume of the source water used to produce the final sample. Can the student use mass balance calculations to determine the concentration of the contaminant in the final water sample? If so, what is the concentration of the contaminant in the final sample?

asked Jan 22 in Analytical Chemistry by KyleWaddy213 (1.9k points)

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