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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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PLS HELP ME ITS DUE IN 5 MINS
Andreyy89

Answer:It's 12 and 43

Step-by-step explanation:

5 0
3 years ago
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A child walks due east on the deck of a ship at 3 miles perhour.
VladimirAG [237]

Answer:

16.28 mph ; 79.38°

Step-by-step explanation:

Given the following :

Speed of child due east = 3mph

Speed of ship due North = 16mph

Relative speed of th child is obtained by using Pythagoras rule to find the hypotenus

Relative Speed = Sqrt(3² + 16²)

Relative Speed = sqrt(9 + 256)

= sqrt(265)

= 16.2788 mph

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From trigonometry ;

Tanθ = opposite / Adjacent

Tanθ = (16 / 3)

Tanθ = 5.333

θ = tan^-1(5.333)

θ = 79.379°

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6 0
3 years ago
It's question B as I've done A please help
Hatshy [7]
Its easy.use cos rule.
4 0
3 years ago
The estimated total cost, y, of a child’s toy is partially based on the number of batteries used, x. The cost of one battery is
mixas84 [53]

Answer: The equation that represents the give situation is, y = 0.75 x + 12

Step-by-step explanation:

Here, x represents the number of batteries the child bought and y represents the total cost.

Since, the cost of one batteries = $ 0.75

⇒ The cost of x batteries = 0.75 x

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Hence, the total cost = The cost of one toy + The cost of x batteries

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Which is the required equation that represents the given situation.

6 0
3 years ago
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A Pac-Man poster is the shape of three-fourths of a circle with a diameter of 18 inches and two sides that are 9 inches each. Wh
slava [35]

Answer:

60.39 inches

Step-by-step explanation:

Given that:

A Pac-Man poster which is having three fourth of a circle and there are two sides.

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To find:

Perimeter of the Pac-Man poster.

Solution:

Perimeter of a figure is nothing but equal to the periphery i.e. the outer area of the circle/figure.

Perimeter of a circle is given by the formula:

Perimeter = 2\pi r

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Radius is half of perimeter.

r=\dfrac{18}{2} = 9\ inches

Perimeter of the Pac-Man poster = Perimeter of \frac{3}{4} circle + 2 sides

Perimeter of the Pac-Man poster = \frac{3}{4}\times 2\times \pi \times 9  + 9+9 = 42.39+28 = <em>60.39 inches</em>

7 0
2 years ago
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