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Answer:</h2>
Average atomic mass of an element is the sum of the masses of its isotopes each multiplied by its natural abundance





Answer:
The mass of copper = 208.26 grams.
Explanation:
Density = mass / volume
8.9 = mass / 23.4
mass = 8.9 * 23.4
= 208.26 grams.
Answer:
1 mole is equal to 1 moles C6H6, or 78.11184 grams.
Hopefully this helped!
-✩sandwichchan✩
Answer:
Atomic Number: 35
Number of Neutrons: 2
Explanation:
The number of protons and electrons are the same, so given that this element has 35 electrons, it also has 35 protons.
Atomic number is the number of protons, so it is 35.
Mass number is the number of protons + neutrons, so take the mass number of 37 and subtract the 35 protons to get 2 neutrons.