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Lana71 [14]
3 years ago
8

How do particles of solids,liquids, and gases differ?

Chemistry
2 answers:
butalik [34]3 years ago
7 0
Solids have a definite volume and shape, liquids have a definite volume but not shape, and gas has no definite volume or shape.
mariarad [96]3 years ago
3 0
Solids- stuck together, hardly moving
Liquid- like solids, together but slide pass one another
Gases- are everywhere, they bounce back when they hit an end point 
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What type of bonds exist in a molecule of water? Polar covalent bonds ionic bonds hydrogen bonds van der waals non polar covalen
Aleksandr [31]
Polar covalent bonds (because hydrogen and oxygen form polar bonds and are both nonmetals so it's covalent) and hydrogen bonds (because the water molecules are attracted to each other with partial charges, causing specific properties like surface tension).

So in my very bad drawing that I attached in case you're more a visual learner, the d- and d+ show the partial charges of hydrogen and oxygen (making it polar, as the electrons in the bond are more shifted towards oxygen, which is why oxygen has a negative sign) and the yellow dotted line show the hydrogen bonds.

7 0
3 years ago
In the decomposition potassium nitride, 10.65 g of nitrogen form. How much potassium nitride was present initially ?
leonid [27]

Answer:

Mass =  99.8 g  

Explanation:

Given data:

Mass of potassium nitride = ?

Mass of nitrogen produced = 10.65 g

Solution:

Chemical equation:

2K₃N→ 6K + N₂

Moles of nitrogen:

Number of moles = mass/ molar mass

Number of moles =  10.65 g / 28 g/mol

Number of moles = 0.38 mol

Now we will compare the moles of nitrogen with potassium nitride.

                        N₂              ;         K₃N

                         1               :            2

                         0.38          :          2×0.38 =0.76

Mass of potassium nitride:

Mass = molar mass × number of moles

Mass =    131.3 g/mol ×   0.76 mol

Mass =  99.8 g    

7 0
3 years ago
What does the kinetic theory state about the kinetic energy of gas molecules? A. The kinetic energy of gas molecules is inversel
STatiana [176]

Answer: option B. The kinetic energy of gas molecules is directly proportional to the Kelvin temperature of the gas.


Explanation:


The kinetic theory of gases explains the behavior and properties of gases from a molecular perspective.


Specifically and explicity, the kinetic theory of gases states that gases are constituted by particles (molecules) and that the average kinetic energy of the particles is proportional to the absolute temperature (Kelvin scale) of the gas. Furthermore, the temperature of all the (ideal) gases is the same at a given temperature.


Hence, you know that the higher the temperature of the gas, the higher the kinetic energy and the average speed of the molecules.


Other postulates of the kinetic theory of gases are that: i) the volume of the particles is neglectible; ii) the particles do not exhibit intermolecular attraction or repulsion; iii) the particles are in continuous random motion in straight paths, until they collide with other particles or the walls of the vessel, and iv) the collisions are elastic (the energy is conserved).

4 0
2 years ago
Chemical changes involve the breaking and making of chemical bonds. TRUE or FALSE.
lubasha [3.4K]
 The answer is TRUE chemical changes do involve breaking and the making of chemical bonds.
4 0
2 years ago
A doctor recommends no more than 2.00 grams of sodium chloride (NaCl, 58.55 g/mole) per day. Potato chips have 250.0mg of NaCl p
Alexeev081 [22]

Answer : The number of servings of this potato chips eaten to consume 0.0230 moles of NaCl must be, 5.39

Explanation :

First we have to calculate the moles of NaCl.

\text{Moles of NaCl}=\frac{\text{Mass of NaCl}}{\text{Molar mass of NaCl}}

\text{Moles of NaCl}=\frac{250.0mg}{58.55g/mol}=\frac{0.250g}{58.55g/mol}=0.004269mol

Now we have to calculate the number of servings.

As, the number of serving in 0.004269 moles of NaCl = 1 serving

So, the number of serving in 0.0230 moles of NaCl = \frac{0.0230}{0.004269}=5.39 serving

Thus, the number of servings of this potato chips eaten to consume 0.0230 moles of NaCl must be, 5.39

8 0
3 years ago
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