How many atoms of gold (au) are present in a sample of 2.5 mol au?

1.5 × 10^24 atoms au

1.5 × 10^23 atoms au

4.2 × 10^24 atoms au

4.2 × 10^23 atoms au

Which of these is the result of scientific research and not engineering? a. a new shoe design that features air cushioning for more comfort and protection b. the creation of glass with uv protection. c. a conclusion about diet commonalities among diabetics. d. the development of a smaller, more compact missile.

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li