Mole Day and chemistry.

0:03 Caloroga Shark Media. Five daily trivia questions powered by AI. Hi, I'm Mark Ellison. Today's theme is Molday and Chemistry. The periodic table, famous chemists, elements, laboratory breakthroughs, and the chemistry of everyday life. Question one. Molday celebrates the bridge between atoms and the lab bench. Since the 2019 SI redefinition, what exact constant now defines a mole and what is its fixed value? Question 2. During a solar eclipse in 1868, astronomers spotted a mysterious yellow spectral line at about 587.6 Nm that didn't match any known element, leading them to name a new one after the sun. Which element was first discovered in the sky before being isolated on Earth?

1:03 Question 3. Which chemist used meticulous sealed vessel combustion experiments to show that mass is conserved and that oxygen, not phlogiston, is involved in burning, helping to found modern quantitative chemistry? Question 4. Name the transformative industrial process that combines atmospheric nitrogen with hydrogen over an iron catalyst at high temperature. and pressure to produce ammonia, enabling the modern fertilizer industry. Question 5. Nonstick cookware stays slick thanks to a fluorinated polymer better known by the brand name Teflon. What is the chemical name of this polymer? We'll be right back with these answers after this break. Welcome back! Question 1.

2:04 What exactly defines the mole since 2019? Answer. The Avogadro constant, 6.02140761023 mole 1. The SI now defines the mole by fixing the Avogadro constant to an exact value, meaning one mole contains exactly 6.0247G1023 specified entities. This decoupled the mole from a mass of carbon-12 and tied it directly to a precise count. Question 2. Which element was discovered in the sun before? On Earth. Answer. Helium. Pierre Janssen and Joseph Norman Lockyer observed helium's distinctive D3 line in the solar spectrum. It wasn't isolated on Earth until 1895, confirming the celestial discovery.

2:48 Question 3. Who proved mass is conserved in chemical reactions? Answer. Antoine Lavoisier. Lavoisier's careful measurements demonstrated that combustion involves combination with oxygen, not loss of an imaginary substance. His work toppled phlogiston theory and established the conservation of mass in reactions. Question 4. What process makes ammonia from N2 and H2? Answer. The Haber-Bosch process. Developed by Fritz Haber and Karl Bosch in the early 20th century, the Haber-Bosch process produces ammonia... NH3 on a massive scale. It underpins nitrogen fertilizers that have boosted crop yields for billions of people. Question 5.

3:32 What polymer is Teflon made of? Answer. Polytetrafluoroethylene, PTFE. PTFE consists of repeating CF2B units. The strong carbon-fluorine bonds and low surface energy make it chemically inert and extremely slippery. That's why foods have a hard time sticking to coated pans. That concludes today's five daily trivia questions. I'm Mark Ellison, and today's questions were crafted with the help of AI technology. See you tomorrow.