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Varvara68 [4.7K]
3 years ago
12

Identify each of the atomic models described here.

Chemistry
2 answers:
bagirrra123 [75]3 years ago
5 0

Dalton model :) Hope this helped.

romanna [79]3 years ago
3 0

Answer:

Dalton model///////////////////////////

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Describe the difference between intensive and extensive propoerties. Which of the following propoerties are intensive: (a) mass;
STatiana [176]

Answer:

The properties <u>that </u><u>do not vary</u><u> with the variation in the quantity of the material are called as </u><u>intensive property</u>.

While the <u>extensive properties</u><u> are those which </u><u>vary with the variation in the quantity of the material</u>.

Intensive properties:

Mass and volume

Extensive properties:

Density and melting point

Explanation:

The properties <u>that </u><u>do not vary</u><u> with the variation in the quantity of the material are called as </u><u>intensive property</u>.

While the <u>extensive properties</u><u> are those which </u><u>vary with the variation in the quantity of the material</u>.

Intensive properties:

Mass and volume, as with increase in quantity of the material mass and volume increases.

Extensive properties:

Density and melting point, as they remain constant for a object or material

4 0
3 years ago
Name three natural chemicals and three artificial chemicals that are part of your daily life
hichkok12 [17]
Natural chemicals: 
<span>- sodium chloride </span>
<span>- methane gas </span>
<span>- water </span>

<span>Artificial chemicals: </span>
<span>- drugs </span>
<span>- detergents </span>
<span>- paints</span>
4 0
3 years ago
Read 2 more answers
When a gas is heated, _______.
frez [133]

Answer:

B. Some of the absorbed energy is converted into potential energy, and some is converted into kinetic energy

Explanation:

7 0
3 years ago
Cryolite (Na3AlF6) is used in the production of aluminum from its ores. It is made by the reaction 6 NaOH 1 Al2O3 1 12 HF 8n 2 N
kap26 [50]

<u>Answer:</u> The mass of cryolite produced in the reaction is 1181.8 g

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}      .....(1)

Given mass of aluminium oxide = 287 g

Molar mass of aluminium oxide = 102 g/mol

Putting values in equation 1, we get:

\text{Moles of aluminium oxide}=\frac{287g}{102g/mol}=2.814mol

The given chemical reaction follows:

6NaOH+Al_2O_3+12HF\rightarrow 2Na_3AlF_6+9H_2O

By Stoichiometry of the reaction:

1 mole of aluminium oxide produces 2 moles of cryolite

So, 2.814 moles of aluminium oxide will produce = \frac{2}{1}\times 2.814=5.628mol of cryolite

Now, calculating the mass of cryolite by using equation 1:

Moles of cryolite = 5.628 moles

Molar mass of cryolite = 210 g/mol

Putting values in equation 1, we get:

5.628mol=\frac{\text{Mass of cryolite}}{210g/mol}\\\\\text{Mass of cryolite}=(5.628mol\times 210g/mol)=1181.8g

Hence, the mass of cryolite produced in the reaction is 1181.8 g

5 0
2 years ago
If 0.25 mol of HClO2 is added to enough water to prepare a 0.25 M HClO2 aqueous solution, what is the concentration of H3O+(aq)
hammer [34]

Answer:

The concentration of H3O+= 0.15M

Explanation:

From The equation of reaction

HClO2(aq) + H2O(l) ⇌ H3O+(aq) + ClO2−(aq)

0.25mol HClO2(aq) 0.25mol producesClO2−(aq) and x-mol of H3O+

Using Kc = [H3O+][ClO2-]/[HClO2]

0.15= 0.25*x/0.25

Simplify

x=0.15M

5 0
3 years ago
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