Use the graph to answer the questions. What is the half-life of isotope X?

How many radioactive atoms of isotope X are left after 3 half-lives?

How many half-lives must have occurred if only 7 atoms of isotope X are left?

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

Acontainer holds 35.8 moles of gas under 10.0 atm of pressure at 70.0 c. what is the volume of the container?

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.