Question 3: Empirical and Molecular Formula (1 point) a. What is the difference between the empirical formula and the molecular formula? (.5 point)

b. How does one determine the molecular formula from the empirical formula? (.5 point)

Question 4: Percent Composition (3.5 points)

a. How is the percent composition by mass determined? (.5 point)

b. Determine the percent composition of each element in MgCl2. (1 point)

i. Magnesium (Mg): (.5 point)

ii. Chlorine (Cl): (.5 point)

c. Calculate the empirical formula from the given percent compositions.
82% nitrogen (N), 18% hydrogen (H) (2 points)

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

c, liquids evaporate, creating a gas

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.