De ce crezi ca vechile colinde inca se canta si apar prelucrari noi, modernr ale acestora?

10. translate each of the following chemical equations into a sentence. a. 2 zns(s) + 3 o2(g) -> 2 zno(s) + 2 so2(g) b. cah2(s) + 2 h2o(l) -> ca(oh)2 (aq) + 2 h2(g)

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

The appropriate concentration for an iodine sanitizer is