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3 years ago

How many electrons are in an Fe2+ ion? (1) 24 (3) 28 (2) 26 (4) 56

2 answers:

fomenos3 years ago

7 0

The answer is (1) 24. There are 26 protons in nucleus of Fe atom. There is 26 electrons in Fe atom. Fe atom loses 2 electrons and change to Fe2+ ion. So there is 24 electrons in Fe2+ ion.

Alina [70]3 years ago

5 0

Atomic number of iron = 26
Number of protons in the neucleus = 26 
Number of electrons in a neutral Fe atom = 26 
Number of electrons in Fe2+ ion = 26 - 2 = 24

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What is the difference between a cation and an anion?

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An anion has a negative charge, while a cation has a positive charge.

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3 years ago

1. Which of the following is a correctly written thermochemical equation?

WITCHER [35]

Explanation:

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The given correct thermochemical reactions are:

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2. Phase change affect the value of the enthalpy change of the thermochemical equation. This is because change in phase is accompanied by change in energy. For example:

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7 0

3 years ago

Read 2 more answers

What temperature would 3.54 moles of xenon gas need to reach to exert a pressure of 1.57 atm at a volume of 34.6 l

ira [324]

Answer:

186.9Kelvin

Explanation:

The ideal gas law equation is PV = n R T

where

P is the pressure of the gas

V is the volume it occupies

n is the number of moles of gas present in the sample

R is the universal gas constant, equal to 0.0821 atm L /mol K

T is the absolute temperature of the gas

Ensure units of the volume, pressure, and temperature of the gas correspond to R ( the universal gas constant, equal to 0.0821 atm L /mol K )

n = 3.54moles

P= 1.57

V= 34.6

T=?

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186.9Kelvin ( approximately to 1 decimal place)

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3 years ago

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Which is an element? A: H20 B: NaCl C: Mg D: CO

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Neutrons: 32
Electrons: 27

Hope this helps!

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3 years ago

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