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3 years ago

What is the hydronium ion (H3O+) concentration in milk if it has a pH of 8.2?

1 answer:

5 0

The hydronium ion is H₃O⁺ and its concentration is equivalent to the H⁺ ion concentration. The H⁺ ion concentration is given by:

pH = -log[H⁺]
[H⁺] = 10^(-8.2)
[H⁺] = 6.31 x 10⁻⁹ mole/dm³

The hydronium ion concentration is 6.31 x 10⁻⁹ mole/dm³

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Find the side lengths of the triangle in this picture.

ozzi

Answer:

Hypotenuse: 41 meters, Long leg: 40 meters, Short leg: 9 meters.

Step-by-step explanation:

According to the statement, we have the following information about the lengths of the right triangle:

Hypotenuse

$3\cdot x + 14$

Long leg

$3\cdot x + 13$

Short leg

$x$

By the Pythagoric Theorem, we have the following expression:

$(3\cdot x + 14)^{2} = x^{2} + (3\cdot x + 13)^{2}$ (1)

$9\cdot x^{2}+84\cdot x + 196 = x^{2} + 9\cdot x^{2} + 78\cdot x + 169$

$9\cdot x^{2} + 84\cdot x + 196 = 10\cdot x^{2} + 78\cdot x +169$

$x^{2} -6\cdot x -27 = 0$

$(x-9)\cdot (x+3) = 0$

As length is a positive variable by nature, then the only possible solution is $x = 9$ . Lastly, the side lengths of the right triangle are:

Hypotenuse: 41 meters, Long leg: 40 meters, Short leg: 9 meters.

8 0

2 years ago

Write a ratio, in simplest form and a percent for the shaded area

mars1129 [50]

Answer:

drhjrdrhj

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

F = (9/5× C)+ 32<br><br><br> 90°C = __°F

Nikitich [7]

Answer:

c= 1/ 90 f

Step-by-step explanation:

5 0

2 years ago

ASAP 26 POINTS

zepelin [54]

23 is your answer. IT's 22.8 but rounded up its 23

6 0

3 years ago

Read 2 more answers

What are the zeros of the function f(x) =(x^2 - 3x - 10)(x + 4)<br> !!Please help!!!

murzikaleks [220]

F(x) = (x² - 3x - 10)(x + 4) becomes (x - 5)(x + 2)(x + 4) when completely factored. Now set each binomial equal to zero.

x - 5 = 0
x = 5

x + 2 = 0
x = - 2

x + 4 = 0
x = - 4

Your zeros are at x = - 4, - 2, and 5. Or at (- 4, 0), (- 2, 0), and (5, 0).

7 0

3 years ago