Answer: At some point in your chemistry education, you may have been introduced to the song “The Elements in which Tom Lehrer does a rapid
fire musical rendition of all the elements' names. Like me, you may even have been offered the opportunity to memorize this song for extra credit. If so, it’s possible that you still remember the names of all the elements, which is an impressive feat—not to mention a fun trick to pull out at parties.
Explanation:
Answer:
1.5057×10^22 atom
Explanation:
As we
1 mole of argon = 40 g of argon
i.e 40 g of argon = 1 mole of argon
1 g of argon = 1/40 mole of argon
1 mole of argon = 6.023×10^23 atom of argon
1/40 mole if argon = 1/40 ×6.023×10^23
= 1.5057×10^22
Answer:
Excess Reagent = oxygen
Explanation:
Limiting reagent: The substance that is totally consumed when the reaction is completed.
Excess reagent: The substance left after the limiting reagent is consumed completely
The balanced chemical equation for formation of water is as follow:
![2H_{2}+O_{2}\rightarrow 2H_{2}O](https://tex.z-dn.net/?f=%20%3Cstrong%3E2H_%7B2%7D%2BO_%7B2%7D%5Crightarrow%202H_%7B2%7DO%3C%2Fstrong%3E)
This means when 2 moles of hydrogen reacts with 1 mole of oxygen, 2 moles of water is produced.
Hence the ratio in which hydrogen and oxygen gas reacts is 2:1
Now if 2 mole hydrogen require 1 mole of oxygen ,then 4 mole hydrogen need 2 mole of oxygen.
![H_{2}:O_{2}=2:1](https://tex.z-dn.net/?f=%3Cstrong%3EH_%7B2%7D%3AO_%7B2%7D%3D2%3A1%3C%2Fstrong%3E)
or
![H_{2}:O_{2}=4:2](https://tex.z-dn.net/?f=%3Cstrong%3EH_%7B2%7D%3AO_%7B2%7D%3D4%3A2%3C%2Fstrong%3E)
Here 5 mole of oxygen is reacting but only 2 mole is required .
Oxygen is in excess.
Best Answer
1 mole of a substance contains 6.022x10^23 "units" of that substance.
So 0.187 mol of Na+ is 1.13x10^23 ions (6.022x10^23 x 0.187).