The forces between particles are called intermolecular forces. A strong intermolecular force means that the particles are tightly paced and is associated with the solid phase. Moderate intermolecular force is associated with the liquid state and little to no intermolecular force is associated with the gaseous state. Temperature has a direct effect on the state of matter in which the substance exists has. Generally speaking, a rise in tempreature changes a substance from the solid to liquid phase and from liquid to gaseus phase. The reverse is true, if the temperature lowers then the substance will go from gas to liquid and liquid to solid. It is important to not that temperature affects intermolecular forces. As the temperature increases then the individual particles become excited and gain enough energy to over the intermolecular forces and so the particles seperate from each other.
Hey there!
Great question=)
Yes, this statement is true! Propane burns in air and it produces carbon dioxide and water.
I hope this helps;)
The concentration of the solution is 8 M
<u><em>calculation</em></u>
<em> </em>Concentrati<em>on = moles/volume in liters</em>
<em> </em><em>step 1: find moles of HF</em>
<em>moles of HF =mass/molar mass</em>
<em>molar mass of HF = 1+ 19 )= 20 g/mol</em>
<em> moles is therefore = 32.0 g/ 20 g/mol= 1.6 moles</em>
<em>Step 2: convert ml to L</em>
<em>volume in liters = 2.0 x 10^2 / 1000 =0.2 l</em>
<em>step 3: find the concentration</em>
<em>concentration = 1.6 mol / 0.2 l = </em><em>8 M</em>
6 protons
4 electrons in 1st shell
2 valence electrons 2nd shell
Answer: The appearance of the substance before the phase change can be described as Melting, Vaporization, Sublimation, Condensation.
Melting:
When a substance converts from the solid to the liquid.
Vaporization:
The substance changes from a liquid to a gas.
Condensation:
When a substance converts from a gas to a liquid.
Sublimation:
When a substance converts directly from a solid to a gas without going through the liquid phase.
Therefore, the appearance of the substance before the phase change can be described as Melting, Vaporization, Sublimation, Condensation.
