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Troyanec [42]
3 years ago
5

1.) The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. What is the approxi

mate pH of a solution if the concentration of hydrogen ions is 5.0 × 10–4 moles per liter?
A.)2.7

B.)3.0

C.)3.3

D.)3.6
Mathematics
2 answers:
umka21 [38]3 years ago
8 0

Answer:

c.) 3.3

Step-by-step explanation:

this is the answer on edge 2020

just did assignment

hope this helps!!!

const2013 [10]3 years ago
6 0

Answer:

c .3.3

Step-by-step explanation:

pH is the negative log of the molar hydrogen ion concentration.The equation to calculate pH is;

pH = -log10[H+]

pH = -log10(5.0 x 10-4)

pH = 3.30

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1.) The check number on a check:
ziro4ka [17]

Answer:

D) Identifies the transaction and is located at the top right corner of the check

Step-by-step explanation:

The check number on a check is the number located at the top right corner of the check, and it can also be found at the bottom of the check, located in lower right corner after the routing number and the account number

The check number aids in the tracking and identifying bank transactions such as to identify checks that the bank has processed and to know outstanding checks that are yet to be processed.

The check number also aids in balancing of the checkbook.

Therefore, the check number on a check identifies the transactions and is located at the top right corner of the check.

4 0
3 years ago
Suppose y varies directly with x. Write a direct variation equation that relates x and y when y = 6 and x = 12
Elenna [48]

Answer: 2

Step-by-step explanation: If 12/6=2 so the answer to the problem is 2 because 6x2=12

7 0
3 years ago
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A study of class attendance and grades among first-year students at a state university showed that, in general, students who mis
ratelena [41]

Answer:

the numerical value of the correlation between percent of classes attended and grade index is r = 0.4

Step-by-step explanation:

Given the data in the question;

we know that;

the coefficient of determination is r²

while the correlation coefficient is defined as r = √(r²)

The coefficient of determination tells us the percentage of the variation in y by the corresponding variation in x.

Now, given that class attendance explained 16% of the variation in grade index among the students.

so

coefficient of determination is r² = 16%

The correlation coefficient between percent of classes attended and grade index will be;

r = √(r²)

r = √( 16% )

r = √( 0.16 )

r = 0.4  

Therefore,  the numerical value of the correlation between percent of classes attended and grade index is r = 0.4

3 0
3 years ago
Find the area of each sector.
nevsk [136]

Answer:

225

Step-by-step explanation:

360 - 135 = 225

7 0
3 years ago
A bag contains three green marbels and eight white marbels. suppose in marble is randomly selected. what are the odds in favor o
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B, 8 to 11 because general number of marbles is 8+3=11 and only 8 of all are white)
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3 years ago
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