Explanation:
The minimum amount of energy required by a substance to begin a reaction is known as the activation energy.
Therefore, we can conclude that when you strike a match, you provide activation energy that enables the flame to appear.
Whereas a catalyst helps in increasing the rate of reaction but it does not start the reaction. On the other hand, when reactants combine together then we get products.
Thus, we can conclude that options (a), (b), (c), and (e) are not correct.
Hence, option (d) is the correct answer.
It is known as a Solution
Answer:
Kp=Kc *(RT)+-3
Explanation:
The relation between Kp and Kc is given below:
Where,
Kp is the pressure equilibrium constant
Kc is the molar equilibrium constant
R is gas constant , R = 0.082057 L atm.mol⁻¹K⁻¹
T is the temperature in Kelvins
Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)
For the first equilibrium reaction:
Δn = (0)-(2+1) = -3
Thus, Kp is:
Kp=Kc *(RT)+-3
Explanation:
The given data is as follows.
Volume of tank = 4 
Density of water = 1000 
Since, the tank is initially half-filled. Hence, the volume of water in the tank is calculated as follows.

Also, density of a substance is equal to its mass divided by its volume. Therefore, initially mass of water in the tank is as follows.
Mass = 
=
= 2000 kg
Whereas mass of water in tank when it is full is as follows.
Mass = 
= 
= 4000 kg
So, net mass of the fluid to be filled is as follows.
Net mass to be filled = Final mass - initial mass
= 4000 kg - 2000 kg
= 2000 kg
Mass flow rate
= 6.33 kg/s
Mass flow rate
= 3.25 kg/s
Time needed to fill tank = 
= 
= 
= 649.35 sec
Thus, we can conclude that 649.35 sec is taken by the tank to overflow.
Answer:
A) the temperature of the water will increase.
Explanation:
Consider, first, the dissolution of anhydrous calcium chloride, CaCl2 in water. CaCl2 is a very water soluble ionic compound that, in solution, dissociates into the component ions, Ca2 + and Cl-, which interact strongly with water molecules.
The thermochemical equation that represents the process of dissolution of CaCl2 (s) indicates that it is a strongly exothermic process:
CaCl2(s) --> Ca+2(aq) + 2Cl- (aq) ΔH = -82.8 kJ
Therefore, dissolving CaCl2 in water will produce the release of energy in the form of heat (82.8 kJ per mole of dissolved CaCl2)