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Roman55 [17]
3 years ago
11

During the winter months, many locations experience snow and ice storms. It is a common practice to treat roadways and sidewalks

with salt, such as CaCO3 . If a 18.1 kg bag of CaCO3 is used to treat the sidewalk, how many moles of CaCO3 does this bag contain?
Chemistry
1 answer:
Temka [501]3 years ago
6 0

Answer:

180.845 mol

Explanation:

Molar mass of Ca: 40,078 g/mol

Molar mass of C: 12,0107 g/mol

Molar mass of O: 15,999 g/mol

Molar mass of CaCO3: (40,078+12,0107+3×15,999) 100,0857 g/mol

The number of moles= mass of bag in g ÷ molar mass of CaCO3

⇒ n= (18.1×1000)÷100,0857 = 180.845 mol

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Solid iodine crystals at the bottom of a closed test tube sublime to form iodine vapor. The vapor eventually fills the entire te
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Answer:

Diffusion occurs in solid and liquid through the constant and random motion of the smaller particles called molecules of either solid, liquid or gaseous in permeable medium as witnessed in the experiment.

Explanation:

The kinectic molecular theory of matter states that the smaller particles of matters called molecules are in constant, but random motion and the degree of movement of the molecules depends on the state or phase such matter exist, which is a derivative of the total kinetic energy possessed by the molecules. This average kinetic energy of the molecules as iodine for example is proportional to the temperature of the matter.

Diffusion should be remembered as the movement of molecules of matters from a highly concentrated region otherwise called hypertonic region to a less concentrated region called hypotonic region through a permeable medium until there is an equilibrium in the system. Since diffusion is expected to involve the movement of molecules, and any matter that can exhibit diffusion is said to have moving molecules, therefore, the kinetic molecular theory of matter is proven to be accurate with the observed movement of iodine molecules in the test tube. This shows that even the molecules of solid matters are in constant random motion, this is made more convincing when these molecules migrate without the addition of external energy source like heat, which then help to understand that the natural iodine molecules are in constant random motion, as they are changed to gaseous state without passing through liquid state, a phenomenon called sublimation.

3 0
3 years ago
MgO + 2 LiCl → MgCl2 + Li2O<br><br> Are all the elements balanced?
4vir4ik [10]
Yes. There are the same number on either side of the reaction.
6 0
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Given: There are 39.95 grams of Argon (39.95 g/1 mole) and one mole has a volume of 22.4 Liters (1 mole/22.4 L). What is the vol
marta [7]

Answer:

V_2=19.23L

Explanation:

Hello,

In this case, by using the Avogadro's law which allows us to understand the volume-moles behavior as a directly proportional relationship:

\frac{V_2}{n_2} =\frac{V_1}{n_1}

We can compute the volume of 34.3 g of argon by representing it in mole as shown below:

n_1=1 mol\\\\n_2=34.3g*\frac{1mol}{39.95g} =0.859mol

Thus, we find:

V_2=\frac{V_1*n_2}{n_1}=\frac{22.4L*0.859mol}{1mol} \\\\V_2=19.23L

Best regards.

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3 years ago
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Answer:

the statement is or are true for all chemical reaction is false

Explanation:

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3 0
4 years ago
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koban [17]

Answer:

<h2>4 A</h2>

Explanation:

The magnitude of the current can be found by using the formula

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<h3>4 A</h3>

Hope this helps you

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3 years ago
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