According to bohr's model, how many times were photons emitted from the excited atoms in each sample to produce its atomic emission spectra?
need before 11/5/2019.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction