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3 years ago

Which type of reaction is indicated by a positive AH?

Chemistry

1 answer:

lianna [129]3 years ago

5 0

Answer:

An endothermic reaction

Explanation:

A positive sign indicates that energy is absorbed. Hence it is an endothermic reaction.

A reversible reaction is indicated by a double arrow on the chemical equation.

A spontaneous is indicated by negative Gibbs Free Energy (G) value.

An exothermic reaction is indicated by a negative enthalpy change

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Nuclear Fission and Nuclear Fusion

Free_Kalibri [48]

Answer:

Polonium: Number of protons = 82

Number of neutrons = 206

Sodium: Number of protons = 11

Number of neutrons = 22

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3 years ago

Read 2 more answers

Write a balanced half-reaction for the oxidation of solid manganese dioxide to permanganate ion in basic aqueous solution. Be su

AlexFokin [52]

Answer:

8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l) + 7 e⁻

Explanation:

Let's consider the following oxidation half-reaction that takes place in basic aqueous solution.

Mn(s) ⇒ MnO₄⁻(aq)

First, we will perform the mass balance. We will add 4 H₂O to the products side and 8 OH⁻ to the reactants side.

8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l)

Finally, we will perform the charge balance by adding 7 electrons to the products side.

8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l) + 7 e⁻

3 0

3 years ago

Use the reaction N2(g) + 3H2(g) 2NH3(g) to answer the following questions

densk [106]

Answer:

cvbn

Explanation:

5 0

3 years ago

In the process of performing a spectrophotometric determination of iron, an analyst prepares a calibration curve using a single-

Vesna [10]

Answer:

Yes.

Explanation:

Yes, the change in cuvette lead to a determinate error in the analysis if the different cuvette is used for the analysis because the amount of liquid sample that is used has different volume. If both cuvette are of the same type and has no difference in their structure and size then there is error occurs in the analysis but if both cuvette are different from one another then the error will occur in the analysis. because the amount of liquid that is used has different volume.

8 0

3 years ago

The solution to be tested in this experiment must be buffered to ph of 10. If the ph were considerably higher, such as 12, how w

Serhud [2]

For a solution to be tested in this experiment and must be buffered to pH of 10, the [OH-] change will be, The hydroxide concentration would be higher and the formation of insoluble hydroxide salts with Mg^2 and Ca^2 would cause the determined concentration of water hardness to be too low.

<h3>What would be the [OH-] change?</h3>

Generally, the equation for the Total hardness is mathematically given as

$T=\frac{A*D*1000}{B}$

Where

$D=\frac{molarity}{0.01}$

D=0.02/0.01=2

Therefore

$T=\frac{A*D*1000}{B}\\\\T=\frac{20.4*2*1000}{25}$

T=1632ppm

in conclusion, The hydroxide concentration would be higher .