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4 years ago

In an oxidation half-reaction, which amount is shown?

Chemistry

2 answers:

Advocard [28]4 years ago

5 0

Answer: option C

Explanation:

Oxidation means you loss of electons (LEO) and Reduction is gain of electrons.

Example: sodium gets oxidized by the loss of one electron as shown below

Na------> Na+ + 1e-

Here Na lost one electron hence it is oxidation

Change in oxidation no: 0 to +1

Tatiana [17]4 years ago

4 0

Hi,
The answer should be C.

Hope this helps, if you’d like further explanation please let me know.

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How many moles of O₂ are needed to react completely with 35.0 mol of FeCl₃? *

galben [10]

Answer:

52.5 mol O2

Explanation:

4 FeCl3 + 6 O2 -> 2 Fe2O3 +6 Cl2

4 mol FeCl3 -> 6 mol O2

35.0 mol FeCl3 -> x

x= (35.0 mol FeCl3 * 6 mol O2)/4 mol FeCl3

x=52.5 mol O2

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3 years ago

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Give the reason why the empty crucible should be heated before starting the experiment

sdas [7]

To make sure no cracks are in the crucible and also to remove any moisture present in the crucible by the process of heating.

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3 years ago

Select the correct answer. Based on the reactivities of the elements involved, which reaction will form products that are more s

FinnZ [79.3K]

Answer: The correct answer is option B.

Explanation: Reactivity of elements is defined as the tendency to loose or gain electrons.

These reactions are a type of single displacement reactions. A single displacement reaction is a type of reaction in which an element displaces another element in a chemical reaction. These are studied with the help of reactivity series.

The element which lies above in the reactivity series can easily displace the element which lies below in the reactivity series.

Option A: This reaction will not yield a stable product because Zinc lies below Aluminium in the reactivity series.

$AlBr_3+Zn\rightarrow \text{No reaction}$

Option B: This reaction will yield a stable product because Sodium lies above Calcium in the reactivity series.

$CaBr_2+2Na\rightarrow 2NaBr+Ca$

Option C: This reaction will not yield a stable product because Hydrogen lies below Magnesium in the reactivity series.

$MgBr_2+H_2\rightarrow \text{No reaction}$

Option D: This reaction will not yield a stable product because Calcium lies below Barium in the reactivity series.

$BaBr_2+Ca\rightarrow \text{No reaction}$

Option E: This reaction will not yield a stable product because barium lies below Lithium in the reactivity series.

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4 years ago

On molecular level what I causing the glaciers to melt

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3 years ago

A 20.0 % by mass solution of phosphoric acid (H3PO4) in water has a density of 1.114 g/mL at 20°C. What is the molarity of this

bogdanovich [222]

Assume you have 1 L of the material (you can assume any volume you want, you'll get the same answer).

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3 years ago

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