5. in (3 Points)
Which of the following has the most number of atoms (all in Group 1A):
(Circle the correct answer)
5 g Li (Lithium)
b. 20 g Na (Sodium) 2.1
80 g Rb (Rubidium) 1.4
125 g Cs (Cesium)
All have the same number of atoms
C
a.
d.
f.
45 g K (Potassium)
e.
ii.
(2 points)
Which of the following has the least number of molecules:
(Circle the correct answer)
1 mole of N2 gas
b.
1 mole of O2 gas
1 mole of Cl2 gas
1 mole of Br2 gas
All have the same number of molecules
C.
1 mole of F2 gas
ro ou
e.

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

tinyurl.com/wpazsebu

Explanation:

As molar mass of is 44.013 g/mol and it is given that its mass is 0.195 g.  

Therefore, calculate its number of moles as follows.

              No. of moles =

                                    =

                                    = 0.0044 mol

Here, in 1 mole of there is 2 mole of N. Thus, moles of N present in it is calculated as follows.

                                 = 0.0088 mol

Thus, we can conclude that in 0.195 g of there are 0.0088 mol of N.