This lesson covers solved numerical problems on molarity, molality, mole fraction, and percentage concentrations to help you clearly understand solution concentration concepts in chemistry.

Abstract: Weight fraction is a key indicator to classify high-density polyethylene (HDPE) bales with or without contamination into different quality categories, which determine the values of the bales ...

You’ve heard the gospel: AI is going to change everything. Good, great, grand. But when you’re staring down a deadline and 80 unread emails, you don’t need philosophy, you need a cheat sheet. The ...

Armies of humanoid robots are poised to march into the world’s factories. But before they’re ready to turn a wrench, they must solve what Elon Musk calls “the hands problem.” Creating the mechanical ...

In 1945, as the first atomic bomb exploded in the New Mexico desert, Enrico Fermi stood miles away, holding a few scraps of paper. As the shockwave rolled toward him, he dropped the papers and watched ...

When adults cultivate a “growth mindset” in adulthood and view their mistakes as an opportunity for personal growth and education, even the most uncomfortable situations can have a bright side. Even ...

Artificial intelligence has notorious problems with accuracy — so maybe it’s not surprising that using it as a coding assistant creates more security problems, too. As a security firm called Apiiro ...

The issue is this week’s Asked & Answered. Nearly a month after a cyberattack hit Georgia’s SNAP benefits call center, the hotline system remains down, and some folks still can’t access their SNAP ...

We like to think that we're pretty good at math, especially after years of schooling. But every once in a while, a simple third-grade math problem manages to trip us up and make us question our ...

Center for Computational Toxicology and Exposure, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States ...