(a) The molecular shapes of cis and Trans forms of N2F2 are-
b) There is EN difference between N atom and F atom. Hence the molecule will have a bond dipole.
In Cis form two fluorine atoms are on the same side of N N bond. Hence, bond moment in N2F2 cis form) do not cancel each other. Thus the cis form is polar.
In the trans form two fluorine atoms are on the opposite side of N-N bond. Bond moment of NF cancels each other.
Thus: trans N2F2 is non polar molecule.
Answer:
7.28 × 10³ K
Explanation:
Let's consider the following reaction.
N₂(g) + O₂(g) → 2 NO(g)
The reaction is spontaneous when the standard Gibbs free energy (ΔG°) is negative. ΔG° is related to the standard enthalpy of the reaction (ΔH°) and the standard entropy of the reaction (ΔS°) through the following expression.
ΔG° = ΔH° - T . ΔS°
If ΔG° < 0,
ΔH° - T . ΔS° < 0
ΔH° < T . ΔS°
T > ΔH°/ΔS° = (180.5 × 10³ J/mol)/(24.8 J/mol.K) = 7.28 × 10³ K
The reaction is spontaneous above 7.28 × 10³ K.
Answer:
Calcium carbonate
Explanation:
Ionic compounds that tend to have one or more polyatomic ions are the ones that tend to exhibit both ionic and covalent bonding. The only one that meets this is calcium carbonate.
<span>Some important concepts and facts that will let you to label each statement:
1) Both fusion and fission are nuclear reactions by which atoms change and create energy.
2) Fusion is the kind reaction that occurs in the sun, at extreme high temperatures and pressures.
3) Fusion is the union of two lighter atoms into a larger one.
4) Fission is the division of one atom into two lighter atoms.
5) Fussion creates much more energy than fission and create less radioactive material than fission, but scientist have not found how to control it.
6) Fission is used in nuclear plants to generate power because it can be controlled.
7) Fusion is not used to generate power because the extreme conditions needed and lack of control.
8) Fission reactors use uranium rods to control the chain reactions by absorbing neutrons.
X:
Provides household electricity ---> FISSION
Y: Has rods containing uranium ----> FISSION
Y: Requires high temperature and pressure
-----> FUSION
X: Converts mass into energy ----> FISSION
Y: Does not produce usable amounts of
energy ----> FUSION
Y: Is controlled by neutron
absorption ----> FISSION</span>
Answer : The amount of paper used by average United States citizen are, 210.47 kilograms.
Explanation : Given,
Total mass of paper used in the United States = 70 million tons
Total number of people in the United States = 301.6 million
First we have to calculate the amount of paper used by average United States citizen.
Now we have to convert amount of paper from tons to kilogram.
Conversion used :
1 ton = 907.185 kg
As, 1 ton = 907.185 kg
So, 0.232 ton = 
Therefore, the amount of paper used by average United States citizen are, 210.47 kilograms.
