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3 years ago

The molecule NH3 contains all single bonds. true false

Chemistry

2 answers:

dsp733 years ago

8 0

<h3><u>Answer;</u></h3>

True

<h3><u>Explanation</u>;</h3>

The molecule NH3 contains all single bonds.
NH3 has a three single covalent bond among its nitrogen and hydrogen atoms,because one valence electron of each of three atom of hydrogen is shared with three electron.
There are three covalent bonds are in NH3 . Each hydrogen make a single bond with nitrogen and there is also a pair of electron which is unpaired from nitrogen.

morpeh [17]3 years ago

7 0

Answer:

true

Explanation:

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Which one of the following is not a valid expression for the rate of the reaction below? 4NH3 + 7O2 → 4NO2 + 6H2O Which one of t

Veseljchak [2.6K]

Answer : All of the above are valid expressions of the reaction rate.

Explanation :

The given rate of reaction is,

$4NH_3+7O_2\rightarrow 4NO_2+6H_2O$

The expression for rate of reaction for the reactant :

$\text{Rate of disappearance of }NH_3=-\frac{1}{4}\times \frac{d[NH_3]}{dt}$

$\text{Rate of disappearance of }O_2=-\frac{1}{7}\times \frac{d[O_2]}{dt}$

The expression for rate of reaction for the product :

$\text{Rate of formation of }NO_2=+\frac{1}{4}\times \frac{d[NO_2]}{dt}$

$\text{Rate of formation of }H_2O=+\frac{1}{6}\times \frac{d[H_2O]}{dt}$

From this we conclude that, all the options are correct.

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3 years ago

Determine the net force acting on the object. Then, write whether or not there will be a change in motion. If yes, write the dir

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Answer:

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Therefore there is no change in motion

Explanation:

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3 years ago

4Fe (s) + 3 O2 (g) → 2 Fe2O3 (s)

Novay_Z [31]

Explanation:

The number acquired by an element after the lose or gain of an electron is called oxidation number.

For example, $4Fe(s) + 3O_{2}(g) \rightarrow 2Fe_{2}O_{3}(s)$

Here, oxidation number of Fe(s) is 0 and Fe in $Fe_{2}O_{3}$ is +3.

Oxidation number of O in $O_{2}(g)$ is 0 as it is present in its elemental state.

The oxidation number of O in $Fe_{2}O_{3}$ is calculated as follows.

$2(3) + 3x = 0\\6 + 3x = 0\\x = \frac{-6}{3}\\= -2$

Hence, oxidation number of O in $Fe_{2}O_{3}$ is -2.

The loss of electrons by an element or substance is called oxidation. Here, electrons are being lost by Fe(s) as an increase in oxidation state is occurring. So, Fe(s) is oxidized.

The gain of electrons by an element or substance is called reduction. Here, electrons are being added to $O_{2}$ as a decrease in its oxidation state is occurring. So, $O_{2}$ is reduced.

An element or compound which is being reduced is called oxidizing agent. Here, $O_{2}$ is the oxidizing agent.

An element or compound which is being oxidized is called reducing agent. Here, Fe(s) is the reducing agent.

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3 years ago