Answer: 0.50 mole K2O
Explanation: To convert the mass of K2O to moles we will need to find the molar mass of K2O.
47.2 g K2O x 1 mole K2O / 94 g K2O
= 0.50 mole K2O
Answer:
Oxygen
Explanation:
<em>Oxygen. </em>Based on octet rule (An empirical rule that refers to the tendency of atoms to prefer to have eight electrons in the valence shell giving the same electronic configuration of a noble gas), the Sulfur and oxygen need two electrons to complete eight electrons in its valence shell, giving, in this way, the same electronic configuration as Ne and Ar, respectively.
I hope it helps!
106.905/52.00 equals 205.58
108.905/48.00 equals 226.88
To do this, what we need to do is find the mass of PbCl2 as a whole, and the masses of Pb and Cl2 on their own.
So, the mass can be found by locating the atomic mass on the periodic table! It is that easy :)
The mass of Pb is 207.2
The mass of Cl2 is 70.906, since the mass is 35.453 and we have two of them.
When we add it together, the total mass of PbCl2 is 278.106, all we need to do is add the two masses we calculated before, together!
The formula for percent composition is:
element mass
---------------------- x 100
compound mass
So, lets do the % composition of Pb first.
207.2
---------
278.106
When we divide the two and multiply that answer by 100, we get 74.5%. So, the percent composition of Lead is 74.5%.
Now, lets do the same for Cl!
70.906
------------ x 100
278.106
The answer we get for that is 25.5%. So, that is the percent composition of Cl in PbCl2.
Hope I could help! :)
<span>well the space exploration has changed Florida's economy because without space exploration we would not have the technology we have today. Space exploration has also given many jobs in Cape Canaveral. It has changed the culture in view to space exploration, the public in Florida now views and understands the importance of space exploration more. Also The Kennedy Space Center.</span>