Answer:
5.04 kJ
Explanation:
We are given the enthalpy of fusion of methanol as 3.16 kJ per mol of methanol. Thus, what we need is to determine is the number of mol in 25.4 g of methanol and multiply by this enthalpy.
mol methanol = mass / MW CH₃OH = 25.6 mol / 16.04 g/mol = 1.60 mol
ΔH = 1.60 mol x 3.16 kJ/mol = 5.04 kJ
Answer:
Is 30
Explanation:
You have to minus de 56 with the 26
Lewis Structure of
Oxygen Difluoride is sketched as....
Step 1: Calculate the
total number of valence electrons present in OF₂. This is done by adding all valence electrons of each element. i.e...
Valence e⁻s of Oxygen = 6
Valence e⁻s of Fluorine-1 = 7
Valence e⁻s of Fluorine-2 = 7
------------
Total Valence e⁻s
20Step 2: Draw central element (O) in center surrounded by fluorine atoms. Now, sketch a single bonds between O and both F atoms. Now, subtract 2 electrons per single bond from total valence electrons.. i.e..
Total Valence e⁻s = 20
2 single bonds (2 × 2) = 4
-----------
16Now, distribute remaining 16 electrons on each element to complete its
octet starting from most electronegative element.
Lewis structure of OF₂ is as follow,
It’s C. 4.68 N
I hope this helped out! Have a nice day :)
The number of atoms in Barium (Ba) is 1