Both molarity and molality are measures of a chemical solution’s concentration. The primary difference between the two comes down to mass versus volume. Molarity (M) is the amount of a substance in a ...

The Chicago Manual of Style is an American English style guide published by the University of Chicago Press. The Manual’s guidelines for publishing, style and usage, and citations and indexes—known as ...

US President Donald Trump signed an executive order Monday designating illicit fentanyl as a "weapon of mass destruction". “Today I’m taking one more step to protect Americans from the scourge of ...

President Donald Trump signed a new executive order Monday that classifies fentanyl as a "weapon of mass destruction." The president made the announcement ahead of a medal pinning for military members ...

Section 1. Purpose and Policy. Illicit fentanyl is closer to a chemical weapon than a narcotic. Two milligrams, an almost undetectable trace amount equivalent to 10 to 15 grains of table salt, ...

The bodies of 13 deceased hostages are believed to still be in Gaza. U.S. officials -- including Vice President JD Vance, Special Envoy Steve Witkoff and Jared Kushner -- traveled to Israel this week ...

It’s that time of the year when PBS News Hour invites two of our regular literary critics, Ann Patchett and Maureen Corrigan, to highlight their favorite books of the year. Jeffrey Brown picks up the ...