1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Airida [17]
2 years ago
7

(I WILL GIVE BRAINLIEST) PLEASE HELP!

Mathematics
2 answers:
vfiekz [6]2 years ago
8 0

Answer: im pretty sure its c

Step-by-step explanation: the numbers start at negative and show it is less then until it is it at the highest positive number

kobusy [5.1K]2 years ago
4 0
It’s most likely c correct me if I’m wrong have a great day also could I get brainliest
You might be interested in
Which sequences are geometric?
Vadim26 [7]

Step-by-step explanation:

Just think of these as your building blocks for geometry success.

Diagram for success. ...

Know your properties and theorems.

Understand Euclid's postulates.

Learn the language of math.

Know your angles. ...

Know your triangles. ...

Figure out what you want and what you're given. ...

Now fill in the rest.

8 0
3 years ago
Calculate the pH of a buffer solution made by mixing 300 mL of 0.2 M acetic acid, CH3COOH, and 200 mL of 0.3 M of its salt sodiu
Lesechka [4]

Answer:

Approximately 4.75.

Step-by-step explanation:

Remark: this approach make use of the fact that in the original solution, the concentration of  \rm CH_3COOH and \rm CH_3COO^{-} are equal.

{\rm CH_3COOH} \rightleftharpoons {\rm CH_3COO^{-}} + {\rm H^{+}}

Since \rm CH_3COONa is a salt soluble in water. Once in water, it would readily ionize to give \rm CH_3COO^{-} and \rm Na^{+} ions.

Assume that the \rm CH_3COOH and \rm CH_3COO^{-} ions in this solution did not disintegrate at all. The solution would contain:

0.3\; \rm L \times 0.2\; \rm mol \cdot L^{-1} = 0.06\; \rm mol of \rm CH_3COOH, and

0.06\; \rm mol of \rm CH_3COO^{-} from 0.2\; \rm L \times 0.3\; \rm mol \cdot L^{-1} = 0.06\; \rm mol of \rm CH_3COONa.

Accordingly, the concentration of \rm CH_3COOH and \rm CH_3COO^{-} would be:

\begin{aligned} & c({\rm CH_3COOH}) \\ &= \frac{n({\rm CH_3COOH})}{V} \\ &= \frac{0.06\; \rm mol}{0.5\; \rm L} = 0.12\; \rm mol \cdot L^{-1} \end{aligned}.

\begin{aligned} & c({\rm CH_3COO^{-}}) \\ &= \frac{n({\rm CH_3COO^{-}})}{V} \\ &= \frac{0.06\; \rm mol}{0.5\; \rm L} = 0.12\; \rm mol \cdot L^{-1} \end{aligned}.

In other words, in this buffer solution, the initial concentration of the weak acid \rm CH_3COOH is the same as that of its conjugate base, \rm CH_3COO^{-}.

Hence, once in equilibrium, the \rm pH of this buffer solution would be the same as the {\rm pK}_{a} of \rm CH_3COOH.

Calculate the {\rm pK}_{a} of \rm CH_3COOH from its {\rm K}_{a}:

\begin{aligned} & {\rm pH}(\text{solution}) \\ &= {\rm pK}_{a} \\ &= -\log_{10}({\rm K}_{a}) \\ &= -\log_{10} (1.76 \times 10^{-5}) \\ &\approx 4.75\end{aligned}.

7 0
2 years ago
2,023 nearest hundred
Oxana [17]
2,000

hope this helps
4 0
3 years ago
Read 2 more answers
3/5 of one leap year
jonny [76]

Answer:

219.6 days

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
The profits of a company are found by subtracting the company's costs from its revenue. If a company's cost can be modeled by 14
evablogger [386]

Answer:

-0.0002x^2 +26x-120000

Step-by-step explanation:

The correct question should be:

We have been told that all we have to do to get profit is to subtract the cost from revenue.

Revenue = 40x - 0.0002x^2

Cost <em>= </em>14x + 120,000<em />

<em />

Hence:

Profit = 40x - 0.0002x^2 - (14x + 120000)

40x - 0.0002x^2 - 14x - 120000\\\\40x - 14x - 0.0002x^2 - 120000\\\\26x - 0.0002x^2 - 120000

Putting it in ordered form:

-0.0002x^2 +26x-120000

This is an expression for the profit.

4 0
3 years ago
Other questions:
  • Which option is true when you expand the binomial expression (x+y)^5
    13·1 answer
  • 36x – 8y2 when x = 3 and y = –6
    9·2 answers
  • I’ll mark brainlist the first personify gets it
    6·1 answer
  • A person places $26300 in an investment account earning an annual rate of 3.8%, compounded continuously. Using the formula V=Pe∧
    9·2 answers
  • A doctor sees each of her patients for 25 minutes during a typical appointment how many patients can she see in a typical 7 and
    15·1 answer
  • Translate and solve the algebraic statement for the given number below:
    11·1 answer
  • The amount of matter in an object is its.
    15·2 answers
  • 1. Keith has 224 books in his library. He bought several books at the yard sale over the weekend. He now has 366 books in his
    7·1 answer
  • In the picture is my question :3 thank you so much for your help!
    8·1 answer
  • I need the slope of this graph
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!