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Natali [406]
2 years ago
6

What is the pH of a 3 x 10-4 M solution of HNO3?​

Chemistry
1 answer:
mr Goodwill [35]2 years ago
7 0

Answer:

3.52

Explanation:

-log(3 x 10^-4) = 3.52

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What is the density of a sample of a substance with a volume of 120ml<br> and a mass of 90g?
tigry1 [53]

Answer:

<h3>The answer is 0.75 g/mL</h3>

Explanation:

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

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

From the question

mass = 90 g

volume = 120 mL

We have

density =  \frac{90}{120}  =  \frac{9}{12}  =  \frac{3}{4}  \\

We have the final answer as

<h3>0.75 g/mL</h3>

Hope this helps you

6 0
2 years ago
Which of the following statements is true?
Zolol [24]

The statement that is true among the following sentences is ‘Minerals can be elements or compounds’. Minerals cannot be liquid in form and they are not organic. Minerals are inorganic and present as solid in phase. When placed in water, they do not dissolve at all.

8 0
3 years ago
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What are the balanced chemical equation for these acid and base reactions?
photoshop1234 [79]
It can be easily judged that only the first reaction is an acid base reaction among the three given in the question. So, we can avoid the other two reactions given in the question. Now let us focus and write down the balanced chemical equation of <span>P-Toluidine + HCl.

</span><span>C7H9N + HCl = C7H10N (+) + Cl (-)
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6 0
3 years ago
How long would it take a train to travel 500 miles at 25 mph?
faust18 [17]

Answer:

2 or 3 hrs

I think

<h2>HOPE IT HELPED </h2>
3 0
3 years ago
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Write the Henderson-Hasselbalch equation for a propanoic acid solution (CH3CH2CO2H, pKa = 4.874) using the symbols HA and A–, an
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The Henderson-Hasselbalch approximation is for conjugate acid-base pairs in a buffered solution. We're going to call HA a weak acid, and A- its conjugate base. The equation is as follows:
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Plugging in our symbols and the pKa value, the equation becomes:
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7 0
3 years ago
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