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2 years ago

Which of the following relationships is/are true for gases?

Chemistry

1 answer:

Murljashka [212]2 years ago

7 0

Answer:

Explanation:

Trust me i just did this on study island hehe

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Calculate the pH of a solution prepared by dissolving 0.15 mol benzoic acid (C7H5O2H) and 0.30 mol of sodium benzoate (Na C7H5O2

asambeis [7]

Answer : The pH of a solution is, 4.5

Explanation : Given,

Moles of benzoic acid = 0.15 mol

Moles of sodium benzoate = 0.30 mol

Volume of solution = 1.00 L

The dissociation constant for benzoic acid = $K_a=6.5\times 10^{-5}$

First we have to calculate the value of $pK_a$ .

The expression used for the calculation of $pK_a$ is,

$pK_a=-\log (K_a)$

Now put the value of $K_a$ in this expression, we get:

$pK_a=-\log (6.5\times 10^{-5})$

$pK_a=5-\log (6.5)$

$pK_a=4.2$

Now we have to calculate the pH of a solution.

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[Salt]}{[Acid]}$

Now put all the given values in this expression, we get:

$pH=4.2+\log [\frac{(\frac{0.30}{1.00L})}{(\frac{0.15}{1.00L})}]$

$pH=4.5$

Therefore, the pH of a solution is, 4.5

8 0

3 years ago

How many molecules of water are there in 10 lbs of water?

barxatty [35]

Answer:1.635

⋅

Explanation: yes

4 0

2 years ago

In order to properly calculate how much reactant needs to be used in a chemical reaction to produce a specific amount of product

Alik [6]

Answer:

First, a mandatory stoichiometric balance must be made, and second, the degree of purities and impurities that the reagents have must be analyzed to see how many products they would have.

It is essential that this is taken into account since not all chemical compounds (reactants) are 100% pure and therefore their entirety does not become a product.

Explanation:

As for the stoichiometric balance, it is fundamental since if the equation is not balanced all the data will be wrong.

Many times the quantity in grams and another measurement of the products are obtained, taking into account a standard value of how many reactants will give x quantity of products, a simple rule of three could be made and thus be able to determine in a simpler way how many reactants were catalyzed in reaction.

6 0

3 years ago

Starting with acetylene and bromoethane, show how you would use reagents from the table to synthesize 3-hexanone.

Jobisdone [24]

solution:

A = 192 x (1/2) ^ (15/5) = 192 x (1/2) ^3 = 192 x 1/8 = 24 mg

Starting by hitting acetylene with NaNH2 to deprotonate, this C-- will attack the C connected to the Br Sn2 style to lengthen the chain by two carbons.

Do this same thing again with the other CH of the acetylene and another bromoethaneto get a six carbon chain, namely, 3-hexyne.

Now, reduce the alkyne to an alkene via H2/Pd/C, and that gives 3-hexene.

3 0

3 years ago

What the branch of a zoologist

MrRa [10]

The branch of biology that deals with animals and animal life, including the study of the structure, physiology, development, and classification of animals. The animal life of a particular area or period: the zoology of Alaska; the zoology of the Pleistocene.

6 0

3 years ago

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