Explanation:
Put the pan into a water-containing dish and mix well. Now use a strainer to transfer the solution into another jar. The salt should disappear in it.
And using a tube with a filtrate, transfer the salts that has sand into another bottle with a filtrate. Therefore the sand is split. Eventually, when all the water vaporizes and the salt stays in the bottle, leave the extra solvent and heat it.
Answer:
In order most reactive to least reactive:
D
B
A
C
Explanation:
Im pretty sure the right answer would be 150, but correct me if im wrong please!
The main features of chemistry is the periodic table that is the known thing for chemistry but it also has other features
Answer:
The correct answer is 190.74 KJ/mol
Explanation:
In order to determine the activation energy of a reaction (Ea) from two reaction rates (k1 and k2) at two different temperatures (T1 and T2), we have to use the following equation:
ln (k2/k1)= Ea/R x (1/T1 - 1/T2)
Where R is the gas constant (8.3145 J/mol.K).
We have: k1= 1.32 x 10⁻² L/mol/s ; T1= 707 K
k2= 3.20 L/mol/s ; T2= 851 K
We introduce the data in the equation and determine Ea:
ln (3.20 L/mol/s/1.32 x 10⁻² L/mol/s) = Ea/(8.3145 J/K.mol) x ( (1/707 K) - (1/851 K))
⇒Ea = ln (3.20 L/mol/s/1.32 x 10⁻² L/mol/s)/ ( (1/707 K) - (1/851 K)) x (8.3145 J/K.mol)
⇒Ea = 190,743 J/mol
We divide by 1000 to obtain Ea in KJ/mol: 190.74 KJ/mol
