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Elena L [17]
3 years ago
11

In order to calculate the number of neutrons you must subtract the what from the what?​

Chemistry
2 answers:
Katyanochek1 [597]3 years ago
6 0

Answer:

You take the atomic, or proton number of the element, and you subtract it from the element's mass number.

fredd [130]3 years ago
3 0

Answer:

protons

Explanation:

neutrons and protons make up the mass of the atom

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Read 2 more answers
To three significant digit,what is the mass percentage of iron in the compound Fe2O3​
svlad2 [7]

69.9%

Explanation:

To find the mass percentage of iron in the compound in Fe₂O₃, we would go ahead to express the given molar mass of the iron to that of the compound.

 Mass percentage  = \frac{molar mass of Fe}{Molar mass of Fe_{2}O_{3}  }  x 100

Molar mass of Fe = 55.85g/mol

Molar mass of O = 16g/mol

Molar mass of Fe₂O₃ = 2(55.85) + 3(16) = 159.7‬g/mol

Mass percentage  = \frac{2(55.85)}{159.7}  x  100   = 69.94% = 69.9%

learn more:

Mass percentage brainly.com/question/8170905

#learnwithBrainly

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