Complete the chart. (remember to enter a 0 if necessary.) atomic number: 19 1s: 2s: 2p: 3s: 3p: 4s: 3d: 4p: 5s:

 The completed  chart   atomic number 19  is as below ,

1S  2

2s 2

2p 6

3s 2

3p 6

4s 1

3d 0

4p 0

5s 0

 Explanation

 According to Aufbau  principle  in ground  state, electrons of atom fill  the  atomic orbital of lowest  energy  level   before  occupying  that of higher energy level .

Therefore  element  in  atomic number 19  has  1s2 2s2 2p6 3s2 3p6 4s1  electron configuration .

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.