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What is the mass of sodium in 3 moles of sodium chloride

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.