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

1. they vary with a higher number because boiling is way hotter than melting

the correct answer would be d. hope this !

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.