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Amanda [17]
2 years ago
9

what is the hydronium ion concentration of a solution with a poh of 6.90? 6.29 × 10−7 m 6.53 × 10−7 m 7.18 × 10−8 m 7.94 × 10−8

m
SAT
1 answer:
iren2701 [21]2 years ago
3 0

The hydronium ion concentration of the solution with given value of pOH is 7.94 × 10⁻⁸M.

Option D) is the correct answer.

<h3>What is pH of solution?</h3>

The pH of a solution is defined as the logarithm of the reciprocal of the hydrogen ion concentration  [H+] of the given solution.

From the formular;

pH = -log[ H⁺ ]

pH + pOH = 14

Given that;

  • pOH =  6.90
  • Hydronium ion concentration OH⁻ = ?

First we find the pH

pH + pOH = 14

pH + 6.90 = 14

pH = 14 - 6.90

pH = 7.1

Now, from the above expression;

pH = -log[ H⁺ ]

Hence;

[ H⁺] = 10^(-pH)

[ H⁺] = 10^(-7.1)

[ H⁺] = 7.94 × 10⁻⁸M

Therefore, the hydronium ion concentration of the solution with given value of pOH is 7.94 × 10⁻⁸M.

Option D) is the correct answer.

Learn more about pH & pOH here: brainly.com/question/17144456

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We suggest starting to prep for the the SAT as early as eighth grade year. It sound early, but if a student plans on taking the SAT several times throughout high school, eighth graders can take a relaxed and long-view approach to prepping, and can plan on taking their first SAT sophomore year.
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3 years ago
How many cubic blocks of side length inch would it take to fill a cube with a side length of inch?
Artist 52 [7]

The number of small cubic blocks that is required to fill the big cubic blocks is 2.

<h3>How to calculate the volume of a cube.</h3>

Mathematically, the volume of a cube is given by the following formula:

Volume of cube = S³

<u>Where:</u>

S is the side length of the cube.

<u>Given the following data:</u>

  • Side length of small cube = 1/6 inch.
  • Side length of big cube = 2/6 inch.

For the small cube:

Volume of cube = (1/6)³ = 0.5 in³

For the big cube:

Volume of cube = (2/6)³ = 1 in³

Therefore, the number of small cubic blocks that is required to fill the big cubic blocks is given by:

Number = 1/0.5

Number = 2 cubic blocks.

Read more on volume of a cube here: brainly.com/question/25248189

<u>Complete Question:</u>

How many cubic blocks of side length 1/6 inch would it take to fill a cube with a side length of 2/6 inch

5 0
2 years ago
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All of the following are effective countermeasures of fatigue except:
FinnZ [79.3K]

All of the following are effective countermeasures of fatigue except: D. Allowing your eyes to lose focus.

<h3>What is a countermeasure?</h3>

This is the term that helps to describe something that helps a person to fight against another thing. The counter measure is usually what is taken in order to prevent something from happening or occurring.

Here fatigue has to do with the fact that a person is tired, worn out and they need to rest well in order to continue functioning properly in the chores or the tasks that they are known to indulge in.

When a person is tired they would have issues with their eyes enabling them to focus on what they are doing.

Read more on fatigue here: brainly.com/question/12564121

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2 years ago
Melinda Stoffers owns and operates ABC Print Co. During February, ABC incurred the following costs in acquiring two printing pre
mihalych1998 [28]

Based on the costs to ABC Print Co. to acquire the printing presses, the costs that should be debited to assets are:

  1. Fee paid to factory representative for installation - Yes
  2. Freight - Yes
  3. Insurance while in transit - Yes
  4. New parts to replace those damaged in unloading -No
  5. Sales tax on purchase price - Yes
  6. Special foundation - Yes
  7. Fees paid to attorney to review purchase agreement - Yes
  8. Freight - Yes
  9. Installation - Yes
  10. Repair of damage incurred in reconditioning the press-No
  11. Replacement of worn-out parts - Yes
  12. Vandalism repairs during installation-No

<h3>What costs will go to assets?</h3>

The costs that will go to assets are only those that have to do with the purchasing of the asset, its transportation to the business, and the costs to install it.

The costs going to assets will not include repairs to damage and new parts that may have been purchased to replace damaged parts.

Find out more on cost capitalization at brainly.com/question/17198274

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6 0
2 years ago
A binomial experiment has 6 trials in which p = 0.25. what is the probability of getting at least 3 successes?
guapka [62]

A common discrete distribution is used in statistics, as opposed to a continuous distribution is called a Binomial distribution. The probability of getting at least 3 successes is 0.169.

<h3>What is Binomial distribution?</h3>

A common discrete distribution is used in statistics, as opposed to a continuous distribution is called a Binomial distribution. It is given by the formula,

P(x) = ⁿCₓ × (pˣ) × q⁽ⁿ⁻ˣ⁾

Where,

x is the number of successes needed,

n is the number of trials or sample size,

p is the probability of a single success, and

q is the probability of a single failure.

Given the probability of success is 0.25, while the probability of failure is 0.75. The probability of at least 3 success can be found by subtracting the probability of 0 success, 1 success, and 2 success from the entire probability, therefore, 1.

P(X≥3) = 1 - P(X=0) - P(X=1) - P(X=2)

= 1 - [⁶C₀ × (0.25)⁰ × (0.75)⁶] - [⁶C₁ × (0.25)¹ × (0.75)⁵] - [⁶C₂ × (0.25)² × (0.75)⁴]

= 1 - 0.356 - 0.297

= 0.169

Hence, the probability of getting at least 3 successes is 0.169.

Learn more about Binomial Distribution:

brainly.com/question/14565246

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2 years ago
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