I personally, would remove " Lamp oil is a very polar substance " And replace it with what the article you wrote, was about. For example, lets say you wrote about why people love ice cream, you could have the ending sentence say. " And that's why I wrote about why people love ice cream" Or something along those lines. I'd write a few more facts about it first, don't just have one sentence saying a fact without any supporting detail, hope this helps! :)
Answer:
Silver
Explanation:
What mass of copper was discharge at the cathode in a cell
Answer:
1.76 x 10²²molecucles
Explanation:
Given parameters:
Mass of the sugar C₁₂H₂₂O₁₁ = 10g
Unknown:
Number of molecules = ?
Solution:
The number of molecules can be determined if we find the number of moles first.
Number of moles =
Molar mass of C₁₂H₂₂O₁₁ = 12(12) + 22(1) + 11(16) = 342g/mol
Number of moles = = 0.029mole
1 mole of C₁₂H₂₂O₁₁ will contain 6.02 x 10²³
0.029 mole of C₁₂H₂₂O₁₁ will be made up of 0.029 x 6.02 x 10²³
= 1.76 x 10²²molecucles
Answer: A pressure of 0.681 atm would be exerted by 0.023 grams of oxygen if it occupies 31.6 mL at .
Explanation:
Given : Mass of oxygen = 0.023 g
Volume = 31.6 mL
Convert mL into L as follows.
Temperature =
As molar mass of is 32 g/mol. Hence, the number of moles of are calculated as follows.
Using the ideal gas equation calculate the pressure exerted by given gas as follows.
PV = nRT
where,
P = pressure
V = volume
n = number of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the value into above formula as follows.
Thus, we can conclude that a pressure of 0.681 atm would be exerted by 0.023 grams of oxygen if it occupies 31.6 mL at .