Answer:
Below•
Explanation:
Fossil Fuel: It's a natural gas based on natural materials such as coal.
Biomass: It's the total weight of substance.
(a) distance measured with metre rule or tape rule
time measured with stopwatch/ stop clock/ timer
Average speed = total distance / time
(b) (i) decrease in speed
(ii) Change in speed = a * t
4.5 m/s
<em>hope this helps......</em>
Answer:
C. Degree of ionization
Explanation:
The strength of an acid or a base is determined by how many H+/H3O+ or OH- ions are dissociated in solution. Therefore, it's describing the degree of ionization.
Example: HCl is a strong acid because in water it will pretty much 100% dissociate into H+ and Cl- ions.
Answer:
Sodium and Magnesium
Explanation:
The elements in Groups 1 and 2 get more reactive as you go down the group.
This means that Sodium is more reactive than lithium and Magnesium is more reactive than beryllium.
On the periodic table, as you go down the group, the reactivity of an element increases. Especially with metals in group 1 and 2. Now Lithium is a metal of group 1, followed by Sodium, while Beryllium is a metal in group 2, followed by magnesium. That's how I picked the answers
Explanation:
To break a chemical bond, it is required that particles must have certain amount of energy so that when they can collide with each other due to this energy.
Therefore, there will exist a certain amount of force between the particles which will help in breaking the chemical bond.
This energy due to the motion of particles is known as kinetic energy.
Thus, we can conclude that to break a chemical bond, particles need to collide with a certain amount of kinetic energy.
