A freighter carrying a cargo of uranium hexafluoride sank in the English Channel in late August 1984. The cargo of uranium hexafluoride weighed 2.249 × 108 kg and was contained in 30 drums, each containing 4.41×107 L of UF6. What is the density (g/mL) of uranium hexafluoride?

      An example of a pure substance is

Express the number 5.16 × 10–3 in common decimal form.

Express the number 0.000779 in scientific notation.

 Which one of these represents a chemical change?

Which of the following groups has a higher risk for a tic disorder? Select all that apply.

Which of the following are risk factors for the development of PTSD in children and adolescents? Select all that apply.

Which of the following are medications that are used to treat Alcohol Use Disorder – aka Medication Assisted Treatment (MAT)?

Which of the following are symptom domains of Post-traumatic stress disorder (PTSD)? Select all that apply.

Which of the following statements are questions consistent with the SCOFF behavioral ratings for an eating disorder? Select all that apply.