Answer:
N2+O2-> 2NO
Explanation:
An endothermic reaction refers to a reaction in which heat taken in. This implies that heat is usually absorbed by the reaction system. The enthalpy of reaction for an endothermic reaction is always positive.
The triple bond between two Nitrogen atoms in N2 gas is very strong due to its small size and the triple bond thus the nitrogen molecule has a high dissociation energy. This accounts for the large amount of energy required to break the triple bond between nitrogen atoms in the nitrogen molecule. This causes the oxidation of Nitrogen molecule to NO to be largely endothermic.
Explanation:
When there is transfer of electrons between two atoms then it results in the formation of an ionic bond.
Whereas when there is sharing of electrons between two atoms then it results in the formation of covalent bond.
, , and are ionic compounds as there is bond formation between a metal and a non-metal. So, there will be transfer of electrons and as a result, ionic bond is formed.
is a compound which contains non-metals C and S. Therefore, bond formation is due to sharing of electrons thus, there is covalent bond.
has symmetrical structure and will have equal sharing of electrons. Hence, the molecule will have non-polar covalent bond.
Sea breeze: “A breeze blowing towards the land from the sea, mostly during daytime.”
Land breeze: “A breeze blowing towards the sea from the land, mostly at night.”
Answer: 360 minutes are required for 20 percent of a sample of cyclopropane to isomerize topropane.
Explanation:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
As the units of rate constant is , the reaction follows first order kinetics.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =
t = time for decomposition = ?
a = let initial amount of the reactant = 100
x = amount decayed =
a - x = amount left after decay process = 100-20= 80
Thus 360 minutes are requiredfor 20 percent of a sample of cyclopropane to isomerize topropane.
We know that:
speed = distance / time
time = distance / speed
The speed of light is 3 x 10⁸ m/s
Now, we must convert the distance to meters to obtain our answer in seconds. After that, we will multiply it by 1000 to obtain the answer in milliseconds(ms)
1 mile = 5280 ft
2462 miles = 2462 x 5280 = 12999360 ft
1 ft = 12 inches
12999360 ft = 12999360 x 12 = 155992320 in
1 in = 2.54 cm
155992320 in = 155992320 x 2.54 = 396220492.8 cm
1 m = 100 cm
396220492.8/100 = 3962204.928 m
Time = 3962204.928 / 3 x 10⁸
= 0.0132 seconds
1 s = 1000 ms
0.0132 x 1000 = 13.2 ms