A solution was prepared by dissolving 2.6061g of sodium carbonate in distilled water and making it up to 250cm3. A 25cm3 portion of the solution was titrated against hydrochloric acid. The equivalence point was reached when 18.7cm3 of the acid was added. Calculate the concentration of the hydrochloric acid in mol dm-3 and g dm-3.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy