<h3>Answer:</h3>
Krypton has a higher melting point than argon because of its stronger dispersion forces.
<h3>Explanation:</h3>
Dispersion forces also known as London Dispersion forces are found in non polar compounds. These interactions take place in two steps.
Step 1: Instantaneous Dipole:
In non polar compounds the electron density on atom is symmetrical. When these symmetrical atoms approaches second symmetrical atom, a disturbance in electron densities occur due to repulsion between electrons. Due to repulsion the electrons density change there position and for a small period of time and instantaneous dipole is produced on an atom.
Step 2: Induced Dipole:
The dipole produced in step one when approaches another symmetrical atom, the partial positive part (low electron density site) attracts the electron from symmetrical atom and induces polarity in it. In this way the non polar atoms become polar and interacts with each other.
<h3>Factors Effecting Strength of Dispersion Forces:</h3>
i) Size of Atom / Molecule:
Greater the size of an atom greater will be the dispersion forces and vice versa.
ii) Shape of Molecules:
Greater the branching on molecule, weaker will be the dispersion forces and vice versa.
<h3>Conclusion:</h3>
As the size of Krypton is greater than Argon therefore, it will have stronger dispersion forces and will melt at higher temperature than Argon.
Answer:Salt
Explanation:
In chemistry a salt is produced from a neutralization reaction, when an acid react with a base.
HCl(aq) + NaOH (aq) ----> NaCl (aq) + H2O(l)
A salt consists of the positive ion (cation) of an acid and the negative ion (anion) of a base.
H+(aq) + Cl-(aq) + Na+(aq) + OH-(aq) -------> Na+Cl-(aq) + H2O(l)
When the water is evaporated, the negatively charged chlorine ions combine with the positively charged sodium ions to form a solid salt.
Answer:
<em>B) 12</em><em> </em><em>m/s</em>
Explanation:
s = 43km/1hr
s = 43,000m/3600sec
s = 11.94 m/s
s = 12 m/s
<u>Answer:</u> The amount of heat absorbed by the solution is 2.795 kJ
<u>Explanation:</u>
To calculate the mass of water, we use the equation:
Density of water = 1 g/mL
Volume of water = [70 + 70] = 140 mL
Putting values in above equation, we get:
To calculate the heat absorbed, we use the equation:
where,
q = heat absorbed
m = mass of water = 140 g
c = heat capacity of water = 4.186 J/g°C
= change in temperature = 
Putting values in above equation, we get:
Hence, the amount of heat absorbed by the solution is 2.795 kJ
