Answer:
I guess its because of friction
Explanation:
friction kills the cells of surface
I guess not so sure
2 lone pair on phosphorus
Answer:
Mol. mass of ethyl alcohol =C2H5OH=46
No. of moles of ethyl alcohol =4660=1.304
Mol. mass of methyl alcohol =CH3OH=32
No. of moles of methyl alcohol =3240=1.25
′XA′, mole fraction of ethyl alcohol =1.304+1.251.304=0.5107
′XB′, mole fraction of methyl alcohol =1.304+1.251.25=0.4893
Partial pressure ethyl alcohol =XAp˙A0=0.5107×44.5=22.73mmHg
Partial pressure methyl alcohol =XBp˙B0=0.4893×88.7=73.40mmHg
Total vapour pressure of solution =22.73+43.40=66.13mmHg
Mole fraction of methyl alcohol in the vapour
=Total vapour pressurePartial pressure of CH3OH
Explanation:
I HOPE THIS HELPS YOU
Answer:
The melting and boiling points of molecular compounds are generally quite low compared to those of ionic compounds. This is because the energy required to disrupt the intermolecular forces between molecules is far less than the energy required to break the ionic bonds in a crystalline ionic compound
1. This can be due to the dissolving of the solid in liquid and form a solution.
Dissolving is a physical property because dissolving doesn't form new substances and the chemical composition of the solid is not changed.
The color building up over the time can be due to the rate of dissolving of the solid and amount of particles have been dissolved.
Example:
- Dissolving of CuSO₄ solid in water.
- This develops a blue color.
2. This can be due to the chemical reaction between the solid and liquid.
Chemical reaction is a chemical property because from reacting substances new substances can be formed which the chemical formula is different from initial substances.
The color building up over the time can be due to the rate of the reaction and the amount of reactants.
Example:
- The reaction between calcium metal with water.
- The color of Ca(OH)₂ is white color.
- Reaction is
Ca(s) + 2H₂O(l) → Ca(OH)₂(aq) + H₂(g)