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fgiga [73]
2 years ago
10

How many moles are in a sample of 3.01 x 10^18 formula units of sodium hydroxide (NaOH)?

Mathematics
1 answer:
Lunna [17]2 years ago
4 0

Step-by-step explanation:

We can use the formula to find the number of moles. As ,

:\implies n = No. of particles/ N_A

:\implies n = 3.01× 10¹⁸/6.022 × 10²³

:\implies n = 1/2 / 10⁵

<h3>Hence the number of particles is 1/2 / 10⁵ </h3>

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Assume that we want to construct a confidence interval. Do one of the​ following, as​ appropriate: (a) find the critical value t
Feliz [49]

Considering that we have the standard deviation for the sample, the t-distribution will be used, and the critical value is t = 2.6682.

<h3>When should the t-distribution and the z-distribution be used?</h3>
  • If we have the standard deviation for the sample, the t-distribution should be used.
  • If we have the standard deviation for the population, the z-distribution should be used.

In this problem, σ is not​ known, hence we get the standard deviation of the sample from the histogram and the t-distribution is used.

Using a t-distribution calculator, considering a <em>confidence level of 99​%</em> and 56 - 1 = <em>55 df</em>, the critical value is t = 2.6682.

More can be learned about the t-distribution at brainly.com/question/16162795

4 0
2 years ago
Please answerrrr, its not that hard i dont think lol, i j dont know it :)
dlinn [17]

Not a function.

It's conic section parabola. It's just a relation.

6 0
2 years ago
If AB = 15, BC = 12, and CA = 8, list the angles of abc in order from smallest to largest.
SIZIF [17.4K]
<span>angles of abc in order from smallest to largest.
<ABC, <CAB, <ACB

Hope it helps

p.s. 
smallest angle opposites shortest side
largest angle opposites longest side</span>
6 0
3 years ago
Read 2 more answers
The perimeter of a triangle is 70 in. The shortest side is 11 in. less than the longest side. The middle side is 24 in. less tha
kondor19780726 [428]

Answer:

The sides are

6

inches,

8

inches and

10

inches

Explanation:

I'd suggest that the question should read 'The perimeter of a triangle is 24 inches. The longest side is 4 inches longer than the shortest side, and the shortest side is three-fourths the length of the middle side. How do you find the length of each side of the triangle?'

In this case the question can be answered. If

x

is the length of the middle side, then the shortest side is 3/4x and the longest side is 3/4x+4

x+3/4x+3/4x+4=24

10/4x=20

x=8

Then the shortest side is 6and the longest side is 10

Step-by-step explanation:

4 0
3 years ago
Please help is for now
telo118 [61]

Answer:

2

Step-by-step explanation:

Given:

-2(1-4x)=3x+8

Let's distribute the parenthesis

-2+8x=3x+8

Let's subtract -3x from both sides

-2+5x=8

Let's add 2 to both sides

5x=10

Now, let's divide both sides by 5 to get x alone

x=2

Hope this is helpful

7 0
2 years ago
Read 2 more answers
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