Answer:
151.1J
Explanation:
Given parameters:
Mass of iron = 6.21g
Initial temperature of iron = 25°C
Final temperature of iron = 79.8°C
Unknown:
Amount of heat = ?
Solution:
The amount of heat require to cause this temperature can be determined using the expression below;
H = m c (T₂ - T₁)
H is the amount of heat
m is the mass
c is the specific heat capacity
T is the temperature
Specific heat capacity of iron 0.444J/g°C
Insert the parameters and solve;
H = 6.21 x 0.444 x (79.8 - 25)
H = 151.1J
<span>Compounds with stronger inter molecular forces have higher boiling points.
Methanol has strong hydrogen bonds. It will have the next highest boiling point.
CH4, has the lowest boiling point.
The order of strengths of intermolecular forces is:
ion-ion > H-bonding > dipole-dipole > London dispersion
.</span>
Answer:
A. Metallic bond
Explanation:
Think about it: copper and tin are both common metals. That's how we know it's a metallic bond!
Why not B: Covalent bonds are between two nonmetals.
Why not C: Ionic bonds are between a nonmetal and a metal.
Why not D: Paired bond isn't a common phrase in chemistry.
Explanation:
M+=108 is way of representing molecular formula of a compound indicating simple numbers of each type of atom in a molecule and there is no information about the structure.
Here it given the molecule is hydrocarbon with 8 carbon atom and 12 hydrogen atom. Thus the compound is C8H12.
C8H12 has one ring and two double bonds.
1. In first reaction reactant a is the electron donor, while b is the electron acceptor,
the oxidized product is c while the reduced product is d
2. in the second equation e is the electron donor, f is the electron acceptor
g is the oxidized product while h is the reduced product.
3. In the third reaction i is the electron donor, j is the electron acceptor , k is the oxidized product while l is the reduced product.