Answer:
Giant structures are usually arranged in to giant regular lattices and they are extremely strong because they have many bonds involved. Simple molecules are just normal molecules as the name suggests like CO². though it contains strong covalent bond it still has weak intermolecular forces
Explanation: when your account gets to deleted and your trying to get your points up lol
Answer: Activation energy
Explanation:
In a chemical reaction, the reactants contains particles which must collide in order for a reaction to occur. The rate of reaction depends on the frequency of effective collision between the reacting particles. Effective collision are those that result in reactions, which when they occur the colliding particles become activated with increased kinetic energy.
This energy must exceed a particular energy barrier for a particular reaction if the reaction must take place. This energy barrier that must be overcome before a reaction takes place is known as the ACTIVATION ENERGY.
To explain further, when two particles or molecules A and B come in contact with each other, for a reaction to take place, they must collide with a sufficient force to break the bond that exists between them. The minimum combined kinetic energy these reactant particles must possess in order for their collision to result in a reaction is called the activation energy.
Answer:
Explanation:
10)
Given data:
Mass of iron = 5 g
Mass of FeO = ?
Solution:
Chemical equation:
2Fe + O₂ → 2FeO
Number of moles of iorn:
Number of moles = mass/ molar mass
Number of moles = 5g / 55.845 g/mol
Number of moles = 0.09 mol
Now we will compare the moles of FeO with Fe.
Fe : FeO
2 : 2
0.09 : 0.09
Theoretical yield of FeO:
Mass of FeO:
Mass = number of moles × molar mass
Mass = 0.09 mol × 71.844 g/mol
Mass = 6.47 g
11)
Given data:
Mass of iron = 5 g
Mass of Fe₂O₃ = ?
Solution:
Chemical equation:
4Fe + 2O₂ → 2Fe₂O₃
Number of moles of iron:
Number of moles = mass/ molar mass
Number of moles = 5g / 55.845 g/mol
Number of moles = 0.09 mol
Now we will compare the moles of FeO with Fe.
Fe : Fe₂O₃
4 : 2
0.09 : 2/4×0.09 = 0.045
Theoretical yield of Fe₂O₃:
Mass of Fe₂O₃:
Mass = number of moles × molar mass
Mass = 0.045 mol × 159.69 g/mol
Mass = 7.2 g