What is the mass of 5.40×1021 platinum atoms?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

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.

What is true for a substance that releases energy