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Gwar
14 days ago
15

Given two half reactions as follows: A2+ → 2 A2+ + 3 e− 4 e− + B → B4− What would you multiply each half-reaction by, to cancel

out the electrons?
Chemistry
1 answer:
Tems11 [2.4K]14 days ago
5 0
To achieve the cancellation of electrons, the oxidation half-reaction needs to be multiplied by 4 while the reduction half-reaction must be multiplied by 3. Explanation: The oxidation reaction accounts for the loss of electrons, increasing the oxidation state, while the reduction implies gaining electrons, leading to a decrease in oxidation state. The respective half-reactions illustrate this, confirming that multiplying the oxidation by 4 and the reduction by 3 achieves the desired effect.
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How many milliliters of 0.200 M NH4OH are needed to react with 12.0 mL of 0.550 M FeCl3?
eduard [2520]

Response:

9.9 ml of 0.200M NH₄OH(aq)

Reasoning:

3NH₄OH(Iaq) + FeCl₃(aq) => NH₄Cl(aq) + Fe(OH)₃(s)

What volume in ml of 0.200M NH₄OH(aq) will fully react with 12ml of 0.550M FeCl₃(aq)?

1 x Molarity of NH₄OH x Volume of NH₄OH Solution(L) = 2 x Molarity of FeCl₃ x Volume of FeCl₃ Solution

1(0.200M)(Volume of NH₄OH Soln) = 3(0.550M)(0.012L)

=> Volume of NH₄OH Soln = 3(0.550M)(0.012L)/1(0.200M) = 0.0099 Liters = 9.9 milliliters

5 0
1 month ago
his is the chemical formula for chromium(III) nitrate: . Calculate the mass percent of oxygen in chromium(III) nitrate. Round yo
eduard [2520]

Answer:

\%\ Composition\ of\ iron=69.92\ \%

Explanation:

The percent composition indicates the mass percentage of a specific element within the compound.

The chemical formula for chromium(III) nitrate is Cr(NO_3)_3.

The molar mass for chromium(III) nitrate is calculated at 238.011 g/mol.

Each mole of chromium(III) nitrate includes 9 moles of oxygen.

The molar mass of oxygen is 16 g/mol.

Hence, Mass = Molar mass * Moles = 16 * 9 g = 144 g.

\%\ Composition\ of\ iron=\frac{Mass_{iron}}{Total\ mass}\times 100

\%\ Composition\ of\ iron=\frac{144}{238.011}\times 100

\%\ Composition\ of\ iron=69.92\ \%

5 0
1 month ago
How many atoms of ^6Li are there in 12.3 g of ^6Li?
alisha [2718]

Answer:6.94

Explanation:Atomic mass of Li = 6.94

To find the number of atoms: 12.6 g Li x 1 mole/6.94 g x 6.02x10^23 atom/mole = 1.09x10^24 atoms

8 0
1 month ago
at 65 degrees celsius, which compound has a vapor pressure of 58 kilopascals? 1. ethanoic acid2. ethanol 3. propanone 4. water
lions [2653]

The vapor pressure of a substance varies with temperature. To identify which compound has a vapor pressure of 58 kilopascals at 65 degrees Celsius, we consult standard tables that list temperature against vapor pressure.

According to the tables or graphs, the answer is:

<span>2. ethanol</span>

7 0
25 days ago
Read 2 more answers
The molar mass of two equally sized samples of unknown gaseous compounds is shown in the table.
eduard [2520]
D.) Gas X possesses a lower density and effuses more quickly than Gas Y. Explanation: Gas X has a lower molar mass compared to Gas Y, and the density of a gas is directly proportional to its molar mass. Therefore, it has a lower density than Gas Y. Thomas Graham discovered that, under constant temperature and pressure, the effusion rates of various gases are inversely related to the square root of their molar masses (M). Consequently, a gas with a lower molar mass will effuse faster than one with a higher molar mass. Thus, Gas X effuses faster than Gas Y. So, the correct selection is: D.) Gas X has a lower density and effuses faster than Gas Y.
8 0
8 days ago
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