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notka56 [123]
3 years ago
14

How many neutrons does an element have if its atomic number is 42 and its mass number is 155? (10 Points)

Chemistry
1 answer:
sertanlavr [38]3 years ago
8 0

The Element would have 197 neutrons

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According to the law of conservation of mass, if an element A has an atomic mass of 2 mass units and element B has an atomic mas
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The law of conservation of mass states that mass is neither created nor destroyed. Since we have 2 g/mol of A and 3 g/mol of B then AB should be equal to the sum of their molar mass that is 

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for the case of A2B3

A2 = 2 * 2 = 4 g/mol
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