In the following image, atoms are represented by colored circles. Different colors represent different types of atoms. If atoms are touching, they are bonded.
Which of the following boxes shows a mixture of elements and compounds?

A. D
B. C
C. B
D. A

What must happen before a body cell can begin mitotic cell division

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it