Which is larger, 0.45 mol of a material or 2. 75 x 10% of the same material? Justify your answer.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?