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Angelina_Jolie [31]
2 years ago
10

How is the number of electrons in an element determined?

Chemistry
2 answers:
scoray [572]2 years ago
6 0

Answer:

By finding the number of protons

Explanation:

Keep in mind when trying to find the number of electrons of a element, the number of electrons also equals the number of protons. In order to find the number of protons in the element simply find it's atomic number.

Example:

Find the number of electrons in the element iron.

Fe (Iron)

Fe's atomic number is 26

Protons/electrons = 26

Hope this helps.

elixir [45]2 years ago
3 0

The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.

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Answer:

The starting position of this object is 3 m

The object is traveling at a velocity of 3 m/s

Explanation:

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what is the boiling point of a 0.321 m aqueous solution of NaCl. Enter your rounded answer with 3 decimal places.
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CaBr + KOH – Ca(OH), + KBr (balance first) What mass, in grams, of
neonofarm [45]

Answer:

129.73 g of CaBr₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CaBr₂ + 2KOH –> Ca(OH)₂ + 2KBr

Next, we shall determine the mass of CaBr₂ that reacted and the mass of Ca(OH)₂ produced from the balanced equation. This can be obtained as follow:

Molar mass of CaBr₂ = 40 + (80×2)

= 40 + 160

= 200 g/mol

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Mass of Ca(OH)₂ from the balanced equation = 1 × 74 = 74 g

SUMMARY :

From the balanced equation above,

200 g of CaBr₂ reacted to produce 74 g of Ca(OH)₂.

Finally, we shall determine the mass of CaBr₂ that react when 48 g of Ca(OH)₂ were produced. This can be obtained as follow:

From the balanced equation above,

200 g of CaBr₂ reacted to produce 74 g of Ca(OH)₂.

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Xg of CaBr₂ = 129.73 g

Thus, 129.73 g of CaBr₂ were consumed.

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3 years ago
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