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What is the solubility of barium sulfate in water at a temperature of 25°C? Give the answer in grams of BaSO4 per 100 mL of water.

asked Jan 21 in Inorganic Chemistry by EmilyUtley95 (2.1k points)

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1 answer 64 views

A chemistry student wants to know how the equilibrium of a reaction will be affected by an increase in temperature. The reaction studied is N2(g) + 3H2(g) ↔ 2NH3(g) and has an equilibrium constant (Kc) of 3.5 x 10^-5 at a certain temperature. If the temperature is increased, what will happen to the concentration of NH3 at equilibrium?

asked Jan 22 in Chemical reactions by AntonioDaven (2.4k points)

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A chemistry student wants to know how the concentration of reactants and products affects the equilibrium constant of a chemical reaction. They decide to investigate the reaction between nitrogen gas and oxygen gas to form nitrogen dioxide gas, and the equilibrium constant Kc for this reaction. What is the relationship between the concentration of reactants and products and the equilibrium constant for this reaction, and how can this be explained by Le Chatelier's principle?

asked Jan 22 in Physical Chemistry by BarneyUyv133 (2.8k points)

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A chemical reaction of N2O4(g) ⇌ 2NO2(g) is established in a closed vessel at a certain temperature. The initial concentration of N2O4 is 0.1M. At equilibrium, the concentration of NO2 is found to be 0.6M. Calculate the equilibrium concentration of N2O4.

asked Jan 22 in Chemical equilibrium by MckenzieWxs (1.9k points)

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1 answer 60 views

What is the oxidation state of sulfur in the compound sodium sulfite (Na2SO3)?

asked Jan 21 in Inorganic Chemistry by Anglea937174 (2.1k points)

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1 answer 68 views

A chemistry student needs to determine the effect on the equilibrium position of a chemical reaction when the concentration of a reactant is decreased. The student is given the balanced equation: N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + heatIf the concentration of H₂ is decreased by removing 50% of its concentration, what would be the effect on the concentration of N₂, NH₃, and the position of equilibrium?

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

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1 answer 13 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 BlondellHock (2.3k points)

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1 answer 68 views

A chemistry student needs to determine the effect of decreasing the temperature on the equilibrium position of the reaction N2(g) + 3H2(g) <-> 2NH3(g) if the initial concentrations of N2, H2 and NH3 are 0.4 M, 0.6 M, and 0.8 M respectively. How does the equilibrium concentration of NH3 change if the temperature is decreased from 400 K to 300 K, assuming constant volume and pressure?

asked Jan 22 in Chemical equilibrium by RandolphNola (3.0k points)

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1 answer 75 views

How do the coordination chemistry principles of chelation therapy contribute to the removal of toxic metal ions from the human body?

asked Jan 22 in Coordination Chemistry by AlanCoover5 (2.2k points)

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1 answer 102 views

What is the balanced chemical equation for the oxidation of ethylene (C2H4) with potassium permanganate (KMnO4), and what are the oxidation states of the carbon atoms before and after the reaction?

asked Jan 21 in Organic Chemistry by Barney65731 (2.6k points)

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1 answer 75 views

What is the pH of a solution that contains 0.1 M hydrochloric acid, HCl?

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

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1 answer 68 views

A chemistry student needs to determine how the equilibrium constant (Kc) will change when the volume of the container is increased by a factor of 3 for the following reaction at a certain temperature:2NO2(g) ⇌ N2O4(g)

asked Jan 22 in Chemical equilibrium by HenryCharles (2.6k points)

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1 answer 55 views

Balance the chemical equation for the reaction of sulfur dioxide (SO2) with oxygen (O2) to form sulfur trioxide (SO3).

asked Jan 22 in Chemical reactions by Precious09K0 (2.8k points)

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1 answer 56 views

A student wishes to determine the standard reduction potential of an unknown metal electrode in a half-cell. They set up an electrochemical cell using a known standard hydrogen electrode (SHE) as the reference electrode and the unknown metal electrode as the working electrode. A voltmeter is used to measure the potential difference between the two electrodes. The reading is +0.45 V. What is the standard reduction potential of the unknown metal electrode in volts?

asked Jan 22 in Physical Chemistry by ElenaBranco0 (2.5k points)

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1 answer 72 views

A 1.00 gram sample of sucrose (C12H22O11) is completely hydrolyzed in solution with excess HCl. If the solution is cooled to room temperature, what is the change in enthalpy ($\Delta H$) for the reaction? The heat capacity of the solution is 4.18 J/(g*K) and the temperature change is -10°C.

asked Jan 22 in ThermoChemistry by AliceW140134 (2.7k points)

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1 answer 74 views

A chemical engineering company has a mixture of ethanol and water with a concentration of 30% ethanol to separate using a distillation column. The company needs to obtain a concentration of 80% ethanol in the distillate at a reflux ratio of 3. Calculate the number of theoretical plates required in the column for the separation, assuming no vapor or liquid bypass, and that the minimum vapor velocity is maintained.

asked Jan 22 in Chemical engineering by RobertoMundy (2.0k points)

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1 answer 103 views

Identify the number of stereoisomers for the compound 2,3-dibromobutane and draw their structures.

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

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1 answer 60 views

A student is trying to synthesize a compound in the lab. The theoretical yield of the compound is 15 g, but due to some errors during the experiment, the student was only able to obtain 10 g in the end. Calculate the percent yield of the experiment.

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

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1 answer 102 views

What is the oxidation product of 2-methyl-1-propanol using Jones' reagent, and what is the mechanism of the reaction?

asked Jan 21 in Organic Chemistry by Marlene31P52 (2.8k points)

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1 answer 55 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 BenjaminWenz (2.4k points)

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