Tag: science & technology

The word 'keme' (or 'chem') meaning 'earth' comes from ancient Egyptian language. This is the origin of words like 'chemistry' and 'alchemy,' referring to the black soil of the Nile Valley which was central to Egyptian civilization.

IUPAC stands for International Union of Pure and Applied Chemistry. It's the global authority on chemical nomenclature, terminology, and standardized measurement, established to provide a common language for chemistry worldwide.

Tungsten's symbol W comes from 'Wolfram,' derived from German. The name originates from the mineral wolframite, which was historically the main source of tungsten. German chemists played a key role in isolating and identifying this element.

Hydrazoic acid has the chemical formula HN3 (or N3H as written in options). It's a highly explosive and toxic compound consisting of a linear chain of three nitrogen atoms bonded to hydrogen. The formula N3H correctly represents this structure.

Alum has the general formula M2SO4·M2(SO4)3·24H2O, but potassium alum (the most common type) is KAl(SO4)2·12H2O - potassium aluminum sulfate dodecahydrate. The 12 water molecules of hydration are characteristic of crystalline alum structure.

Ada Lovelace wrote the first algorithm intended for Babbage's Analytical Engine in the 1840s, making her history's first computer programmer. Babbage designed the machine, Gates founded Microsoft, and Jobs co-founded Apple.

Dry ice is solid carbon dioxide that sublimates (turns directly from solid to gas) at -78.5°C. The 'Corbondioxide' option contains a typo but refers to the correct substance.

Sunlight takes approximately 8 minutes and 20 seconds (500 seconds) to reach Earth, traveling at 299,792 km/s across 150 million km. This is approximately 8 minutes.

Oracle was founded by Larry Ellison (along with Bob Miner and Ed Oates) in 1977. Bill Gates founded Microsoft, Larry Page co-founded Google, and Steve Wozniak co-founded Apple.