Recent questions in Chemistry

0 votes

1 answer 40 views

A copper wire is exposed to a solution containing 0.2 M NaCl. The corrosion rate of the wire is found to be 5.8 microAmp/cm². Calculate the corrosion current density of the copper wire in the given environment.

asked Jan 22 in ElectroChemistry by Connie104727 (470 points)

0 votes

1 answer 47 views

A copper rod with a surface area of 5 cm² is coupled with an iron rod with a surface area of 10 cm² to form a galvanic cell. When the circuit is closed, the current flows for 2 hours and the weight loss of the iron rod was found to be 0.58 g. Determine the corrosion rate of the iron rod in millimeters per year (mm/yr) assuming a density of 7.86 g/cm³ for the iron.

asked Jan 22 in ElectroChemistry by Staci6700611 (450 points)

0 votes

1 answer 48 views

A copper electrode is placed in a 1.0 M Cu(NO3)2 solution while a silver electrode is placed in a 1.0 M AgNO3 solution. If the cell potential is measured to be 0.74 V at standard state conditions, what is the equilibrium constant for the reaction Cu(s) + 2Ag+(aq) ⇌ Cu2+(aq) + 2Ag(s)?

asked Jan 22 in ElectroChemistry by Edward211098 (590 points)

0 votes

1 answer 8 views

A copper electrode is immersed in a 0.1M solution of CuSO4 and a zinc electrode is immersed in 0.1M solution of ZnSO4. Both the solutions are connected with a salt bridge. If the standard reduction potentials of Cu2+/Cu and Zn2+/Zn are +0.34V and -0.76 V respectively, calculate the potential difference between the two electrodes at 25°C.

asked Jan 22 in ElectroChemistry by WalterRandol (470 points)

0 votes

1 answer 80 views

A container initially contains 0.10 mol of NOBr, 0.10 mol of NO, and 0.10 mol of Br2. If the system reaches equilibrium and the concentration of NOBr is found to be 0.075 M at that point, calculate the concentration of NO and Br2 at equilibrium.

asked Jan 22 in Chemical equilibrium by KristenBever (510 points)

0 votes

1 answer 58 views

A container has a mixture of nitrogen and oxygen gases at equilibrium. If the temperature of the container is increased, predict the direction in which the equilibrium will shift according to Le Chatelier's principle and explain why.

asked Jan 22 in Chemical reactions by VirgieMcLaur (650 points)

0 votes

1 answer 49 views

A container contains 2 moles of a gas at a pressure of 8 atm and a temperature of 300 K. Calculate the volume of the gas in each of the following thermodynamic ensembles: microcanonical, canonical, and grand canonical ensembles.

asked Jan 22 in Physical Chemistry by EssieHimes15 (350 points)

0 votes

1 answer 5 views

A container at room temperature contains two gases, oxygen, and nitrogen. The container has a small hole that allows gas molecules to escape. If the hole is big enough, which gas will escape faster and why? Calculate the ratio of their rates of effusion.

asked Jan 22 in Physical Chemistry by ShannaFord50 (390 points)

0 votes

1 answer 6 views

A compound contains 42.8% carbon, 14.3% hydrogen, and 42.9% oxygen by mass. Determine its empirical formula.

asked Jan 22 in Inorganic Chemistry by MellisaNauma (370 points)

0 votes

1 answer 64 views

A compound contains 29.5% sodium, 41.1% sulfur, and 29.4% oxygen by mass. Determine the empirical formula of the compound.

asked Jan 22 in Inorganic Chemistry by ShielaFlaner (330 points)

0 votes

1 answer 7 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 ReeceHodges (370 points)

0 votes

1 answer 56 views

A chemistry student was given a sample of an unknown compound. The student performed an analysis on the sample using mass balance calculations and obtained the following data: the sample had a mass of 2.64 g and contained 1.32 g of carbon, 0.22 g of hydrogen, and 0.88 g of oxygen. What is the molecular formula of the unknown compound?

asked Jan 22 in Analytical Chemistry by CharlotteBal (650 points)

0 votes

1 answer 56 views

A chemistry student was given a sample of a white crystalline substance, suspected to be a mixture of sodium chloride (NaCl) and potassium chloride (KCl). The student performed an analysis and found that the sample contained 64% chlorine by mass. Calculate the mass percentage of sodium chloride and potassium chloride present in the mixture.

asked Jan 22 in Analytical Chemistry by DarleneTudor (390 points)

0 votes

1 answer 82 views

A chemistry student wants to understand the effect of changing the volume on the equilibrium position of a chemical reaction. Accordingly, the student designs an experiment where they mix 0.2 mol of nitrogen gas with 0.1 mol of hydrogen gas in a 1 L container and allow them to react to form ammonia gas. If the reaction reaches equilibrium at a certain temperature and the volume of the container is suddenly decreased to 0.5 L, what will be the effect on the concentration of ammonia gas?

asked Jan 22 in Chemical equilibrium by AntonSalo054 (410 points)

0 votes

1 answer 54 views

A chemistry student wants to synthesize alum (KAl(SO4)2.12H2O) from 12 g of potassium hydroxide (KOH) and excess sulfuric acid (H2SO4). If the actual yield of the reaction is 9.3 g, what is the percent yield of this reaction?

asked Jan 22 in Chemical reactions by Larhonda9708 (410 points)

0 votes

1 answer 55 views

A chemistry student wants to synthesize 29.0 g of NaCl from its constituent elements. What mass of sodium and chlorine should the student start with, assuming they have unlimited access to both elements and using the balanced chemical equation for the formation of NaCl from its constituent elements?

asked Jan 22 in Inorganic Chemistry by DrusillaDesi (450 points)

0 votes

1 answer 76 views

A chemistry student wants to study the isomerism in coordination compounds through the structural formulas and their properties. Can you identify and compare the geometric and optical isomers for the coordination complex [Co(NH3)5Cl]2+? Also, determine whether the complex is chiral or achiral.

asked Jan 22 in Coordination Chemistry by AHBJim662535 (390 points)

0 votes

1 answer 68 views

A chemistry student wants to study the adsorption of nitrogen gas on a copper surface at 298 K. The student knows that the Langmuir adsorption isotherm can be used to describe this system. They want to determine the maximum amount of nitrogen gas that can be adsorbed on the copper surface and the adsorption energy of nitrogen to the copper surface. Can you help the student to calculate these values using the Langmuir adsorption isotherm equation?

asked Jan 22 in Surface Chemistry by EnriquetaWhe (710 points)

0 votes

1 answer 45 views

A chemistry student wants to study the adsorption behavior of a gas on a solid surface. The Langmuir adsorption isotherm experiment is conducted at temperature T. After analyzing the data, the student finds that the maximum adsorption capacity (at saturation) is q moles of the gas per unit area of the solid surface. The student also determines the value of the Langmuir constant K, which is proportional to the affinity of the gas for the surface. Now, the student needs to determine the fraction of the surface that is covered by the gas molecules at a certain pressure P below the saturation

asked Jan 22 in Surface Chemistry by MoniqueLogue (330 points)

0 votes

1 answer 75 views

A chemistry student wants to see the effect of adding a specific buffer on the equilibrium position of a 0.1 M acetic acid (CH3COOH) and 0.1 M sodium acetate (CH3COONa) solution. If the initial pH of the solution is 4.7, what is the pH of the solution after adding the buffer? (Ka of acetic acid is 1.8 x 10^-5).

asked Jan 22 in Chemical equilibrium by RodrickWilsh (330 points)

Page:

« prev
1
...
203
204
205
206
207
208
209
210
211
...
234
next »

Recent questions in Chemistry

Categories