Answer:
1. Answer is a. HCl gas
2. Answer is c. H2O liquid
3. Answer is a.H2O liquid
4. Answer is b.CO2 gas
5. Answer is c.CH3(CH2)3CH3
Explanation:
1. Which has the smallest enthalpy of fusion?
a. HCl gas
b.Li2O solid
c. MgO solid
d. H2O liquid
Answer is a. HCl gas
2. Which has the highest normal boiling point?
a.CH4 gas
b. NH3 gas
c. H2O liquid
Answer is c. H2O liquid
3. Which has the greatest heat of vaporization?
a.H2O liquid
b. H2Se gas
c. H2Te gas
d.H2S gas
Answer is a.H2O liquid
4. Which has the greatest vapour pressure at 25°C?
a. H2O liquid
b.CO2 gas
c. SiO2 solid
Answer is b.CO2 gas
5. Which has the least viscosity? a. HOCH2CH2OH syrupy liquid
b. CH3CH2OH liquid boiling point above 70 °C
c.CH3(CH2)3CH3 liquid, low boiling point below 40 °C
Answer is c.CH3(CH2)3CH3
I think it is true. The formation reaction always means that the product substance is made directly and all by the elements of the reactants. And standard means under 25℃ and one atmosphere.
Jets streams play a key role in determining the weather because they usually separate colder air and warmer air.
Niobium has Highest ionization energy.
<u>Explanation:</u>
The next ionization energy removes an electron from the same electron shell, which increases "ionization energy" due to "increased net charge"of the ion from which the electron is being removed.
Let's compare each of the metals first ionization energies,
Rubidium has its first ionization energy as 403 kJ / mol.
Zirconium has its first ionization energy as 660 KJ / mol.
Niobium has its first ionization energy as 664 KJ / mol.
From the given data above, we can infer that Rubidium has the least Ionization energy whereas Niobium has the highest Ionization energy. We can give the increasing order of the given elements as follows-
Rubidium < Zirconium < Niobium
