Calculate the molarity of a solution prepared by the addition of 2.59 g of NaNO3 into 250 ml of solution

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Suppose you mix one mole of sulfuric acid (h2so4) with 1 mole of sodium hydroxide(naoh). why does the ph of the solution remain below 7? ( explain so i can get better understanding! )

What is the importance of interlocking the fingers and rubbing while washing hands? the palms are the dirtiest parts of the hands. the spaces between the fingers get washed. the backs of the hands get washed. the fingernails are the dirtiest parts of the hands