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spayn [35]
3 years ago
12

How many neutrons does element X have if its atomic number is 25 and its mass number is 85?

Mathematics
2 answers:
Lynna [10]3 years ago
5 0

Neutrons= Atomic Mass Number- Atomic Mass Number

So 85-25= 60

Natalija [7]3 years ago
3 0

<u>Answer:</u>

60 neutrons

<u>Step-by-step explanation:</u>

We are given that the atomic number of an element X is 25 and its mass number is 85 and we are find the number of neutrons this element has.

We will use the following formula to find the number of neutrons:

<em>Neutrons = Atomic mass number - Atomic number</em>

So substituting the given values in the above formula to get:

Number of neutron = 85 - 25 = 60

Therefore, element X has 60 neutrons.

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<h2>Answer:</h2>

An angle measures how how much you have to rotate one line called <em>initial side</em> so it lies on the top of other line called the <em>terminal side. </em>Angles whose vertex is located at the origin having the initial side on the positive x-axis is said to be in standard position. On the other hand, coterminal angles are angles in standard position having the same terminal side. In this way, for the angle:

-110^{\circ} \\ \\ Its \ coterminal \ is: \\ \\ \alpha=360^{\circ}-110^{\circ}=\boxed{250^{\circ}}

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3 years ago
The mean, median and mode of the five numbers are same. if four numbers are 7,7,5 and 7, what must be the fifth number?
Morgarella [4.7K]

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The fifth number is <u>9</u>

Step-by-step explanation:

7 is the mode because it appears the most.

7 has to be the median, so the fifth number could be anything.

7 has to be the mean, so you would do:

7 x 5 = 35

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3 years ago
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makkiz [27]

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Step-by-step explanation:

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3 years ago
An athletics squad trains on a long straight track with dots marked at 10m intervals. The coach sets out cones on some of the do
Sedaia [141]

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There are 6 ways to run 10 m between two cones of the four cones giving a maximum available distance to run as 60 meters

Step-by-step explanation:

The parameters given are

Distance between two cones = 10 m

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3 years ago
−6(x+7)=−4x−2 how many solutions
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Answer: There is one solution, -20

Step-by-step explanation:

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There is one solution, -20

Hope it helps <3

8 0
3 years ago
Read 2 more answers
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