Im stuck on chemistry Question?

The overall energy of the particles increases as they absorb more energy to escape to the next phase of matter: solid--->liquid--->gas.

As the temperature of the substance increases, the average kinetic energy increases and once they have attained enough energy, the particles will be vibrating strong enough to break the bonds holding it in the solid state. As a substance changes in this form, solid--->liquid--->gas, the spacing between single molecules will be greater, because a solid is compact and its particles are held together tightly, in a liquid the particles are held together somewhat lightly and so they can move over each other, and in a gas the molecules are separated by somewhat large distances, thereby allowing gas particles to fill the volume of any room/container.

Observations: The solid begins to soften and melt. The melting continues until the solid has change completely to liquid. The liquid becomes hotter and eventually begins to bubble and boil.

The boiling becomes vigorous as the molecules change to the gaseous state. This continues until all of the liquid has vaporised to gas.

Explanations: The addition of Sensible Heat to the rigid solid, increases its molecular activity (increased Kinetic Energy as Temperature). This causes the molecules to move apart (expand). At a particular temperature, with the addition of Latent Heat of Melting with no further temperature increase but, with a further increase in Kinetic Energy the molecules begin to flow over and around each other thereby becoming molten. As this occurs, the solid is becoming 'Fluid' (has the ability to flow).

When all of the solid has changed to liquid, the addition of further Sensible Heat increases the Temperature (Kinetic Energy) until the molecular activity is such that the liquid begins to seethe (boil) and change to vapour (gas). At this point the temperature again becomes constant and the addition of Latent Heat of Vaporisation gives the molecules the ability (Kinetic Energy) to 'Jump Out' of the liquid into the vapour space. The liquid is Vaporising.

Consequences: The Substance has passed from the solid phase, through the liquid phase and into the vapour (gaseous) phase in a series of processes involving Sensible Heat (of heating), and Latent Heats of Fusion (Melting) and Vaporisation (Gasification).

(Reversing the above processes by the removal of the same quantity of heat in each case, (Condensing, Cooling and Solidification), the gaseous substance will return to its original Solid State).

write the balanced equation 4 Al + 3 O2 = 2 Al2O3 mole ratio of unknown ( moles of O2) to common(Al) quantity is 3 / 4 Multiply this by the honestly quantity interior the reaction and remedy 3/4 * 0.586 mol = 0.4395 mol ( 0.440 mol using signif dig)