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Scilla [17]
3 years ago
15

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. Which equation models t

he concentration of hydrogen ions (H+) of a solution whose pH is 7.2?
Mathematics
1 answer:
Zanzabum3 years ago
8 0

Answer:  [H+] = 10^-7.2

Step-by-step explanation:

Given that the PH of the solution = 7.2

Using the formula pH = –log[H+]. To get the H+ concentration from the pH, raise both sides by the base of 10. Then we have

10^ -pH = H+. with pH of 7.2,

Thus the answer to this problem is

[H+] = 10^-7.2

You might be interested in
An orange cone has a exact volume of 120π ft³. What is the height of the cone if the radius is 6ft?
Ber [7]

Answer:

10 ft

Step-by-step explanation:

Given:

  • Radius ⇒ 6 feet
  • Formula of cone ⇒ V = 1/3πr²h

Plug in the values given:

  • 120π=1/3π(6²)h

Cancel π from both sides and simplify:

  • 120 = 1/3 36h
  • 120 = 12h

Answer:

  • Height = 10
4 0
2 years ago
Please help me with this question.<br>​
leonid [27]

Answer:

The answer would be 6.66666666667 to be exact or just 6.66.

-Herobrine

Brainliest will be appreciated thank you!

4 0
2 years ago
Read 2 more answers
Describe the likelihood of the next elk caught being unmarked.
tangare [24]

Using it's concept, it is found that there is a 0.96 = 96% probability of the next elk caught being unmarked.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

In this problem, 5625 - 225 = 5500 elks out of a total of 5625 are unmarked, hence the probability is given by:

p = 5500/5625 = 0.96.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

8 0
2 years ago
Below are tabulated a number of Rockwell G hardness values that were measured on a single steel specimen. Compute
Mashcka [7]

Answer:

a) 48.408

b) 1.235

Step-by-step explanation:

a)

The average hardness value xbar can be computed as

xbar=sum of values/number of values

xbar=(46.5+46.9+49.4+50.3+49.8+48.8+47+47.7+48.3+49.4+47.8+49)/12

xbar=580.9/12

xbar=48.408 (rounded to 3 decimal places).

The average hardness value is 48.408.

b)

The standard deviation hardness value s can be computed as

s=\sqrt{\frac{sum(x-xbar)^2}{n-1} }

x              x-xbar  (x-xbar) ²

46.5  -1.90833 3.64174

46.9  -1.50833 2.27507

49.4    0.99167 0.98340

50.3     1.89167 3.57840

49.8     1.39167 1.93674

48.8    0.39167 0.15340

47.0           -1.40833 1.98340

47.7   -0.70833 0.50174

48.3           -0.10833 0.01174

49.4    0.99167  0.98340

47.8           -0.60833 0.37007

49.0    0.59167 0.35007

Total                               16.7692

s=\sqrt{\frac{16.7692}{12-1} }

s=\sqrt{\frac{16.7692}{11} }

s=\sqrt{1.5245}

s=1.2347

s=1.235 (rounded to 3 decimal places)

The standard deviation hardness value is 1.235.

4 0
3 years ago
Amanda is mailing 5 remote control cars. The mass has a total of 3,470 grams, What is the mass of each car?
Cerrena [4.2K]

Answer:

Assuming each car has the same mass, 694 grams.

Step-by-step explanation:

3470 ÷ 5 = 694

5 0
3 years ago
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