Need with this if someone can
1.) what is the mass of sodium metal that contains 4.653 × 10^19 na atoms?
2.)write the molecular and empirical formulas of the following molecules.
3.) what is the molecular weight of the molecule shown below? round the answer to 4 significant figures.
4.) estrogen (estriol) is a steroid that has the formula c18h24o3. what is the mass of carbon in a 50.0 g sample of estrogen?
the molecule picture for questions 2 and 3 i attached