Explanation:
The molar mass of a substance is the mass in grams of one mole of the substance.
When dealing with compounds the molar mass is the sum of the of its component atomic masses and expresses in grams per mole;
Given compounds;
Fe₂O₃ and Al₂O₃
Atomic mass;
Fe = 55.845g/mol
Al = 26.9185g/mol
O = 15.9994g/mol
Molar mass of Fe₂O₃ = 2(55.845) + 3 (15.9994) =
111.69 + 47.9982 = 159.7g/mol
Molar mass of Al₂O₃ = 2(26.9185) + 3(15.9994) = 53.837+47.9982
= 101.8g/mol
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Molar mass brainly.com/question/2861244
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I think each oxygen atom can share two electrons with the other so that each atom has eight valence electrons. The oxygen atoms forms each two covalent bonds since two pairs of electrons are shared in an oxygen molecule. The sharing of electrons helps the atom to achieve stable structures.
Answer:
Observing and questioning
Explanation:
The Scientific Method:
- Observe
- Question
- Hypothesis
- Experiment
- Collect Data
- Analysis
- Conclusion
Atomic Theory can be used in two subjects, physics and chemistry.