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Stella [2.4K]
3 years ago
7

How many atoms of oxygen (O) are represented in the chemical formula shown below?

Chemistry
1 answer:
Bad White [126]3 years ago
7 0
One atom of oxygen .
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Which of these does not describe a form of electomagnetic radiation?
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What are the possible answers?
3 0
4 years ago
Is.
AlekseyPX

Answer:

Reduction

Explanation:

Oxidation is a process that involves loss of electrons.

Reduction is a process that involves gain of electrons.

In this equation, the electrons (4e-) are in the reactant side. This means that it is gain of electrons.

The reaction is a reduction reaction.

4 0
3 years ago
The dehydrogenation of benzyl alcohol to make the flavoring agent benzaldehyde is an equilibrium process described by the equati
valkas [14]

Answer:

(a) p_{C6H5CH2OH}=2.14x10^{-3}atm

(b) Dissociation =0.99

Explanation:

Hello,

(a) In this case, for the given chemical reaction, the law of mass action becomes:

Kc=\frac{[C6H5CHO][H2]}{[C6H5CH2OH]}

In such a way, as 1.20 g of benzyl alcohol are placed into a 2.00-L vessel, the initial concentration is:

[C6H5CH2OH]_0=\frac{1.20g*\frac{1mol}{108.14g} }{2.00L} =5.55x10^{-3}M

Hence, by writing the law of mass action in terms of the change x due to equilibrium:

Kc=\frac{(x)(x)}{5.55x10^{-3}-x}=0.558

Solving for x by using a quadratic equation one obtains:

x=5.50x10^{-3}M

Thus, the equilibrium concentration of benzyl alcohol is computed:

[C6H5CH2OH]_{eq}=5.55x10^{-3}M-5.50x10^{-3}M=5x10^{-5}M

With that concentration the partial pressure results:

p_{C6H5CH2OH}=[C6H5CH2OH]_{eq}RT =5x10^{-5}\frac{mol}{L} *0.082\frac{atm*L}{mol*K}*523K \\p_{C6H5CH2OH}=2.14x10^{-3}atm

(b) Now, the fraction of benzyl alcohol that is dissociated relates its equilibrium concentration with its initial concentration:

Dissociation=\frac{C6H5CH2OH_{eq}}{C6H5CH2OH_0} =\frac{5.50x10^{-3}M}{5.55x10^{-3}M} =0.99

Best regards.

3 0
3 years ago
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Who is princess tianas best friend, if you can get her name right then ill give you brainliest
marshall27 [118]

Answer:

<h2>Oo i think her name is Tiana..... ❤️❤️</h2>
5 0
3 years ago
Read 2 more answers
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density ?
wariber [46]

Answer:

<h2>2.7 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{40.5}{15}  = 2.7 \\

We have the final answer as

<h3>2.7 g/mL</h3>

Hope this helps you

5 0
3 years ago
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