While working in the lab, you observe the following volume. What is the value that should be recorded?
Select one:
a)17.4 mL
b)18.4 mL
c)13.4 mL
d)19.4 mL

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

The rules of engagement (roe) working group is often used to (select all that apply.)