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FromTheMoon [43]
3 years ago
8

Which electrons are lost by an atom of iron when it forms the Fe3+ ion?

Chemistry
2 answers:
astra-53 [7]3 years ago
8 0
The two s Orbital electrons and one d orbital electron, are the electrons that are lost by an atom of Iron when it forms the Fe3 + ion. 
Varvara68 [4.7K]3 years ago
5 0
<span>B. Two s orbital electrons and one d orbital electron</span>
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The mineral magnesite contains magnesium carbonate, MgCO3 (molar mass= 84 g/mol), and other impurities. When a 1.26-g sample of
Leviafan [203]

The answer is 33.33 %


The explanation:


According to the reaction equation:


MgCO3(s) + 2HCl (aq) --> MgCl2(aq) + H20(l) + CO2(g)


we can see that 1 mole of MCO3 will produce → 1 mole of CO2


-Now we need o get number of mole of CO2:


and when we have 0.22 g of CO2, so number of mole = mass / molar mass


moles = 0.22 g / 44 g/mol = 0.005 mole


∴ moles of Mg = moles of CO2 = 0.005 mole


∴ mass of Mg = moles * molar mass


= 0.005 * 84 /mol = 0.42 g


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= 33.33 %



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3 years ago
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grandymaker [24]

Answer:

The answer is True

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Forensic toxicology involves or  employs or uses disciplines such as analytical chemistry, pharmacology and clinical chemistry to aid medical or legal investigation.

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3 years ago
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Many factors would bring advantages when using fuel cells in cars but which factors present a drawback?
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B. hydrogen storage

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A sample of gas starts at 1.00 atm, 0.00 degrees Celsius, and 30.0 mL. What is the
lara31 [8.8K]

Answer:

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2 years ago
a helium balloon has a volume of 2.95 liters at 25 c. the volume of the ballon decreased to 2.25 l after it is placed outside on
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Answer:

The outside temperature is -45.8°C

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When a gas keeps on constant its moles and its pressure, we can assume that volume will be increased or decreased as the T° (absolute T° in K).

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2.95L/298K = 2.25L / T2

(2.95L/298K ) . T2 = 2.25L

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T2 = 227.2K

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227.2K - 273 = -45.8°C

3 0
3 years ago
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