the innermost electron shell of an atom can hold up to _____ electrons.

A sulphuric acid solution containing per liter of the solution has a density of . (Note:  ; ). Calculate the molarity.

Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation:
3NO2(g)+H2O(l)→2HNO3(l)+NO(g)

Suppose that 4.5 mol NO2NO2 and 0.40 mol H2OH2O combine and react completely. Which reactant is in excess?

Give the IUPAC name for each of the following

Draw the two Watson-Crick base pairs. Number the atoms to clearly distinguish this pairing

Which has the higher crosslinked density; ebonite or soft vulcanized rubber