Answer:
C. T>617 K
Explanation:
We are given that
We have to find the temperature at which the reaction is spontaneous.
When
Therefore, the reaction is spontaneous at certain range of temperature.
Option A is not true.
When is negative, then the reaction is spontaneous.
When T<50
Suppose T=49 K
Therefore, .Hence, the reaction is not spontaneous.
Option B is wrong.
C.T>617K
Suppose T=618 K
Therefore, .Hence, the reaction is spontaneous.
So, option C is true.
D.T<617 K
Suppose T=616 K
Therefore, .Hence, the reaction is not spontaneous.
So, option D is not true.
Explanation:
Atoms of non-metal usually gain electrons when
they react with other elements.
Eg -
Therefore,
Option A is correct ✔
Answer:
Centimeters per minute
Explanation:
Speed measurement is formated as [distance] per [time], like miles per hour.
B and C are incorrect because they are [time] per [distance]
A is incorrect because it is [time] per [time]
Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.