Answer: Energy released during the reaction is 0,299 kcal
Explanation: ΔH is the amount of energy released when 1 mol of C3H8 reacts, but there is no 1 mol but less, 3.40 x 10^20 molecules
Using Avogadro's number is possible to calculate the number of moles
![n= 3,4x10^{20} molecules . \frac{1 mol}{6,0022x10^{23} molecules } = 5,64x10^{-4} mol](https://tex.z-dn.net/?f=n%3D%203%2C4x10%5E%7B20%7D%20molecules%20.%20%5Cfrac%7B1%20mol%7D%7B6%2C0022x10%5E%7B23%7D%20molecules%20%7D%20%3D%205%2C64x10%5E%7B-4%7D%20mol)
The product of the mol number and ΔH is the energy released during the reaction
![H = -531 kcal/mol . 5,64x10^{-4} mol = 0,299 kcal](https://tex.z-dn.net/?f=H%20%3D%20-531%20kcal%2Fmol%20.%205%2C64x10%5E%7B-4%7D%20mol%20%3D%200%2C299%20kcal)
Answer:
regular Coke is denser than diet Coke. Each can of regular Coke has a mass of about 384 g. and diet coke has about 370 g.
Answer:
The windsurfer, his board, and the air and water around him are all made of matter. That matter is made up of very small particles called atoms.
Explanation:
Answer:
<em>When </em><em>a </em><em>substance</em><em> </em><em>is </em><em>cooled </em><em>it's </em><em>internal </em><em>energy</em><em> </em><em>decreases</em><em> </em><em>the </em><em>movement</em><em> </em><em>of </em><em>its </em><em>partical</em><em> </em><em>decreases </em><em>the </em><em>bonds </em><em>between </em><em>particles </em><em>form </em><em>when </em><em>a </em><em>substance </em><em>condenses </em><em>or </em><em>freezes </em><em>or </em><em>sublimes </em><em>to </em><em>form </em><em>a </em><em>solid </em><em>from </em><em>a </em><em>gas </em>
<em><u>may </u></em><em><u>be </u></em><em><u>this </u></em><em><u>might </u></em><em><u>help </u></em><em><u>u</u></em>