The number of neutrons is variable, resulting in isotopes, which are different forms of the same atom that vary only in the number of neutrons they possess. Together, the number of protons and the number of neutrons determine an element's mass number.
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The electric and magnetic fields are generated by moving electric charges, the electric and magnetic fields interact with each other, the electric and magnetic fields produce forces on electric charges, the electric charges move in space.
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Answer:
I think its D
Explanation:
It cant be B or C bc the solute particles arent changing. And its not A because the concentration isnt constant
Molar mass of NaOH = 39.997 g/mol
39.997 g ---------- 6.02x10²³ molecules
g --------------- 2.30x10²² molecules
mass = 2.30x 10²² * 39.997 / 6.02x10²³
mass = 9x199^24 / 6.02x10²³
mass = 15.280 g
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