Do you think thar solids can undergo convection? Explain.

1 answer:

6 0

No because Convection works because hotter faster moving molecules have a lower density and therefore rise to the surface. In a solid the molecules can't move relative to each other they can only vibrate.

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Name the kinds of attractive forces that must be overcome in order to do the following. (Select all that apply.) (a) boil liquid

vivado [14]

Answer:

a) dispersion forces, dipole-dipole forces, hydrogen bonds

b) dispersion forces

c) ion-ion interparticle forces, hydrogen bonds, dipole-dipole forces

d) metallic bonds

Explanation:

The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles(Chem Purdue). Dipole forces exists in all molecules but not in metals.

The intermolecular forces present in each substance must be broken before the stated process can occur.

The nature of intermolecular forces in each substance has been shown in the answer section.

For ammonia, the dispersion forces, dipole-dipole forces and hydrogen bonds must be degraded before liquid ammonia begins to boil.

For solid phosphorus which is non polar, only dispersion forces needs to be broken.

To dissolve CsI in HF, ion-ion interparticle forces of CsI must be broken while the dipole-dipole forces, dispersion forces and hydrogen bonds between HF molecules must be broken.

Potassium metal is a pure metal hence only metallic bonds must be broken in order to melt the solid.

4 0

3 years ago

Which of the following is the correct set-up for the problem: How many grams of water will be produced from 3.2 moles of oxygen

suter [353]

Option C is the correct set of the problem for mass of water produced by 3.2 moles of oxygen and an excess ethene.

<h3>Reaction between oxygen and ethene</h3>

Ethene (C2H4) burns in the presence of oxygen (O2) to form carbon dioxide (CO2) and water (H2O) along with the evolution of heat and light.

C₂H₄ + 3O₂ ----- > 2CO₂ + 2H₂O

from the equation above;

3 moles of O₂ ---------> 2(18 g) of water

3.5 moles of O₂ ----------> x