Answer:
It will take 0.0205s for 79% of cyclobutane to decompose
Explanation:
Step 1: Data given
Temperature = 1000 °C
Reaction is first order
rate constant = 76*1/s
The initial cyclobutane concentration is 1.63M
How long (in seconds) will it take for 79% of the cyclobutane to decompose?
When 79% decomposes, there will remain 21 %
ln ([A]0 / [A]t) * = k*t
There are four variables in the rate law, so if we know three of them, we can determine the fourth. In this case we know [A]0, [A], and k, and need to find t.
⇒ with [A]0 = the original amount = 100 % =1
⇒ with [A]t = the amount after it's decomposed = 21 % =0.21
⇒ k = the rate constant = 76/s
⇒ t= the time needed = ?
ln (100/21) = 76t
t = 0.0205 s
It will take 0.0205s for 79% of cyclobutane to decompose
Rate of Reaction ca be increased by applying following changes,
1) Increase in Temperature:
Increase in Temperature results in the increase of Kinetic Energy, Hence, velocity of reactants increases and rate of collisions increases. Thus, more reactants colloid with enough energy to change into products in given time.
2) Decrease in Activation Energy:
Activation energy is the minimum amount of energy required by reactants to cross the energy barrier to convert into products. Hence, activation energy is decreased by using catalyst.
3) Concentration of Reactants:
The greater the concentration of reactants, greater is the number of reactants per volume. More reactants in less area increase the probability of collision. Hence, collisions increase and rate of reaction increases.
4) Increasing Surface Area of Reactant:
Greater the surface area greater is the rate of reaction.
The answer is B) heat will flow from the water to the copper until they both reach the same temperature
Answer:
the answer is I'm pretty that it's
Explanation:
Ur Wellcome
Answer:
B = Frequency = 4.3 × 10¹⁴Hz
Explanation:
Given data:
Speed of light = 3 × 10⁸ ms⁻¹
Wavelength of light = 7.0 × 10⁻⁷ m.
Frequency = ?
Solution:
Formula:
<em>Speed of light = wavelength × frequency</em>
Frequency = Speed of light /wavelength
Frequency = 3 × 10⁸ ms⁻¹ /7.0 × 10⁻⁷ m.
Frequency = 0.43 × 10⁸⁺⁷ s⁻¹
Frequency = 0.43 × 10¹⁵s⁻¹
s⁻¹ = Hz
Frequency = 4.3 × 10¹⁴Hz