Answer:
The energy content of substances is related to the physical state in which the substance exists. Molecules of gases are always in motion as they possess very high kinetic energy, hence, they exist as gases. Liquid molecules are less energetic than gas molecules, hence they have less flow than gases. Solid molecules on the other are fixed at a place because they possess very low kinetic energy and can only vibrate about their fixed positions.
Explanation:
The three states in which matter exist are solid, liquid and gas.
Solids are made of molecules that are closely packed together and held together by strong intermolecular forces. The particles in a solid possess very low kinetic energy and are not free to move about but can only vibrate and rotate about their fixed positions.
Liquids particles are able to move about as they possess enough kinetic energy to limit or reduce the strength of the intermolecular forces binding them together. Thus, liquids can flow.
The particles in a gas are relatively far apart and possess kinetic energy more than the particles of a liquid or solid. The intermolecular forces binding particles of gas together are weak due to the very high kinetic energy of yhe gas particlest
An electric field travels away from a <u>positive charge</u> and toward a <u>negative charge</u>.
<h3>
What is electric field?</h3>
Electric field is the region of space where the impact of electric force is felt.
The electrostatic field is always directed away from positive charges and toward negative charges, and, field lines must go away from positive charges and toward negative ones.
Thus, an electric field travels away from a positive charge and toward a negative charge.
Learn more about electric field here: brainly.com/question/14372859
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0.69moles
Explanation:
Given parameters:
Number of atoms = 4.14 x 10²³atoms
Atom = Na
Unknown:
Number of moles of Na atom in it = ?
Solution:
A mole of a substance is the quantity of substance that contains the avogadro's number of particles.
1 mole = 6.02 x 10²³particles
To solve this problem, simply use the expression below;
Number of moles = ![\frac{number of particles }{6.02 x 10^{23} }](https://tex.z-dn.net/?f=%5Cfrac%7Bnumber%20of%20particles%20%7D%7B6.02%20x%2010%5E%7B23%7D%20%7D)
Input the parameters;
Number of moles =
= 0.69moles
learn more;
Number of moles brainly.com/question/1841136
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The question is missing the table. Here is the complete question.
The tableshows the concentration of a reactant in the mixture over a period of time.
Reactant Concentration
Time (s) Concentration (M)
0 1.8
210 1.2
450 0.8
580 0.6
720 0.4
What is the average rate of reaction over the first 450 seconds?
A. 1.6x
M
B. 1.9x
M
C. 2.0x
M
D. 2.2x
M
Answer: D. 2.2x
M
Explanation: The average rate of a reaction is the rate of change of the concentrations (of reactants or products) in a period of time:
average = - ΔC/Δt
In this case, concentration is negative because it's related to reactant, since its concentration dimishes while the concentration of product increases.
For the first 450 seconds:
Average = ![\frac{-(0.8 - 1.8)}{450 - 0}](https://tex.z-dn.net/?f=%5Cfrac%7B-%280.8%20-%201.8%29%7D%7B450%20-%200%7D)
Average = ![\frac{1}{450}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B450%7D)
Average = 0.0022
or
Average = 2.2x![10^{-3}](https://tex.z-dn.net/?f=10%5E%7B-3%7D)
So, <u>the Average Rate of the reaction is 2.2x</u>
<u>M</u>