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sleet_krkn [62]
3 years ago
13

Which combination of compounds will create a buffer solution? a weak acid and a weak base a weak acid and its conjugate base a s

trong acid and its conjugate base a strong acid and a strong base
Mathematics
2 answers:
Lemur [1.5K]3 years ago
4 0
Either a weak acid and its conjugate base, or a weak base and its conjugate acid.
Ostrovityanka [42]3 years ago
3 0

Answer:

a weak acid and its conjugate base    

Step-by-step explanation:

A Buffer solution is a solution that tends to keep the pH almost constant when small amounts of acids (H +) or  bases (OH-) are added, therefore, they are very useful to reduce the impact of drastic changes in (H+) and (OH-) in processes that require a specific pH. They can be prepared by dissolving in water adequate amounts of a weak acid and a salt of its conjugate base, or a weak base and a salt of its conjugate acid.

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Find the value of n<br><br><br><br><br>1) 15/40 =n/3​
stepladder [879]

Answer:

n = 1.125

Step-by-step explanation:

\frac{15}{40} = \frac{n}{3}

(Use Cross Product)

40n = 15 × 3

40n = 45

n = 1.125

7 0
3 years ago
e. Translate the word problem below into an equation; then solve. It only takes Vera 2 hours to sew 1 dress, but it takes Ivy 4
Daniel [21]

Using the together rate, it is found that it would take them 16 hours to sew 12 dresses.

<h3>What is the together rate?</h3>

The together rate is the <u>sum of each separate rate</u>.

In this problem, we have that:

  • Vera's rate is of 1/2.
  • Ivy's rate is of 1/4.

Hence, the together rate is the time it would take them to produce one dress working together, and is given by:

\frac{1}{x} = \frac{1}{2} + \frac{1}{4}

\frac{1}{x} = \frac{2 + 1}{4}

3x = 4

x = \frac{4}{3}

Then one dress takes \frac{4}{3} of an hour, and the time for twelve dresses is:

t = 12 \times \frac{4}{3} = 4(4) = 16

It would take them 16 hours to sew 12 dresses.

To learn more about the together rate, you can take a look at brainly.com/question/25159431

6 0
2 years ago
a dozen scones cost $5.95. calculate the unit rate showing scones per dollar and the unit rate showing dollars per scone
kati45 [8]

Answer:

2 scones per dollar

$0.50 per scone

Step-by-step explanation:

5 0
3 years ago
Hey science test is worth 100 points and has 25 questions there are multiple choice questions worth three points each and short
Snezhnost [94]

Answer:

x+y=100

3x+8y=25

Step-by-step explanation:

So there are around 3 essay questions

6 0
3 years ago
What is equivalent expression 9y+y
andrew11 [14]

Answer:

10y

Step-by-step explanation:

9y+y=

10y

4 0
3 years ago
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