Questions
The following cell reaction furnishes 0.62V. 2Fe3+(aq) + Sn2+(aq) ---> 2 Fe2+(aq) + Sn4+(aq) The maximum...

The following cell reaction furnishes 0.62V.

2Fe3+(aq) + Sn2+(aq) ---> 2 Fe2+(aq) + Sn4+(aq)

The maximum electrical energy per mole of Fe(III) ion is (1F = 9.65 x 104 C)

(A) 1.197 x 105 J/mole Fe(III) ion
(B) 2.394 x 105 J/mole Fe(III) ion
(C) 5.98 x 105 J/mole Fe(III) ion
(D) 5.98 x 104 J/mole Fe(III) ion

Correct answer is (C). Please explain why, thank you.

In: Chemistry

A sample of Rh-105 (104.906 g/mol) has an activity of 4.89 x 1021 Bq. What mass...

A sample of Rh-105 (104.906 g/mol) has an activity of 4.89 x 1021 Bq. What mass of Rh-105 is lost after 7 minutes?

Calculate the answer ____________ g Rh-105 is lost.

In: Chemistry

c) Write the reaction of nitrite with water, where transfer of a proton takes place. Identify...

c) Write the reaction of nitrite with water, where transfer of a proton takes place. Identify the Bronsted-Lowry acid-base pairs.

In: Chemistry

A beaker with 1.40×102 mL of an acetic acid buffer with a pH of 5.000 is...

A beaker with 1.40×102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 mol L−1. A student adds 7.90 mL of a 0.470 mol L−1 HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.

Express your answer numerically to two decimal places. Use a minus ( − ) sign if the pH has decreased.

ΔpH= ?

In: Chemistry

Calculate the density, in grams per liter, of a gas at STP if 3.16 L of...

Calculate the density, in grams per liter, of a gas at STP if 3.16 L of the gas at 28.5 °C and 734.2 mmHg weighs 0.269 g

In: Chemistry

NH3 is a weak base (Kb = 1.8 × 10–5) and so the salt NH4Cl acts...

NH3 is a weak base (Kb = 1.8 × 10–5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.027 M in NH4Cl at 25 °C?

In: Chemistry

What is the smallest whole-number coefficient for H₂O when the equation MnO₄⁻ + I⁻ + H₂O...

What is the smallest whole-number coefficient for H₂O when the equation MnO₄⁻ + I⁻ + H₂O → MnO₂ + IO₃⁻ is balanced in basic solution?

In: Chemistry

find the volume of .220 M hydrobromic acid necessary to react completely with 1.32 g of...

find the volume of .220 M hydrobromic acid necessary to react completely with 1.32 g of barium hydroxide

In: Chemistry

The standard heat of formation of CaBr2 is -675 kJ/mol. The first ionization energy of Ca...

The standard heat of formation of CaBr2 is -675 kJ/mol. The first ionization energy of Ca is 590 kJ/mol and its second ionization energy is 1145 kJ/mol. The heat of sublimation of Ca[Ca(s)→Ca(g)] is 178 kJ/mol. The bond energy of Br2 is 193 kJ/mol, the heat of vaporization of Br2(l) is 31 kJ/mol, and the electron affinity of Br is -325 kJ/mol.

Calculate the lattice energy of CaBr2.

In: Chemistry

Calculate the density, in grams per liter, of a gas at STP if 3.16 L of...

Calculate the density, in grams per liter, of a gas at STP if 3.16 L of the gas at 28.5 °C and 734.2 mmHg weighs 0.269 g.

In: Chemistry

True or false? During a chemical reaction no atoms are created from energy or are converted...

True or false?

During a chemical reaction no atoms are created from energy or are converted into energy.

In: Chemistry

how are antibodies that are used in ELISA made

how are antibodies that are used in ELISA made

In: Chemistry

Glucose-Fructose mixture concentration was 73 µg/mL. what is the concentration of glucose in the mixture? total...

Glucose-Fructose mixture concentration was 73 µg/mL. what is the concentration of glucose in the mixture? total volume = 25ml

In: Chemistry

How to I.D major species and minor species in chemistry?

How to I.D major species and minor species in chemistry?

In: Chemistry

A student is studying a reaction between reactants A and B. the reaction is second order...

A student is studying a reaction between reactants A and B. the reaction is second order with respect to A, but zero order with respect to B. Explain in 5-6 sentences what this means.

If the Concetration of A is tripled what will the effect be on the reaction rate?

If the concentration of B is increased 10 times, what will the effect be on the reaction rate?

In: Chemistry