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atroni [7]
2 years ago
11

Number of

Chemistry
1 answer:
babymother [125]2 years ago
8 0

Answer:

A) 20

B) 40

C) Ca

D) 10

E) 9

F) F

Explanation:

The MASS NUMBER is the number of protons + the number of neutrons.

The ATOMIC NUMBER is the number of protons.

You can take the MASS NUMBER - ATOMIC NUMBER = NUMBER OF NEUTRONS.

Each element is unique and distinguished by the NUMBER OF PROTONS = ATOMIC NUMBER, ie...the number of protons in its nucleus. You can find the element's name and symbol on the Periodic Table.

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This is basic chemistry btw.<br> screen shoted it
mr_godi [17]
B) Metalloid because that's a mixture of the other two.
5 0
3 years ago
1. What process occurs along transform fault plate boundary?​
Lana71 [14]

Answer:

hope it helps...

Explanation:

Along the third type of plate boundary, two plates move laterally and pass each other along giant fractures in Earth's crust. Transform faults are so named because they are linked to other types of plate boundaries. The majority of transform faults link the offset segments of oceanic ridges.

7 0
3 years ago
If there are many forces acting on an object how can the net force be 0
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You have to balance out those forces and apply the same amount of equal and opposite force to it. I hope I helped ^^
4 0
3 years ago
Help me out please this is hard​
Brums [2.3K]
The one you have selected is correct. CO is a compound because it contains more than one element.
8 0
3 years ago
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What mass of sodium chloride is needed to prepare 200 ml of a 0.1 M solution
Nikolay [14]

Answer:

C. 1.17 grams

Explanation:

  • The molarity is the no. of moles of solute in a 1.0 L of the solution.

<em>M = (mass/molar mass)solute x (1000/ V)</em>

M = 0.1 M, mass = ??? g, molar mass of NaCl = 58.44 g/mol, V = 200.0 mL.

∴ mass of NaCl = (M)(molar mass)(V)/1000 = (0.1 M)(58.44 g/mol)(200.0 mL)/1000 = 1.168 g ≅ 1.17 g.

5 0
3 years ago
Read 2 more answers
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