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3 years ago

PLEASE ANSWER I'LL GIVE 15 POINTS! XD Choose a number that is correct :P

Chemistry

2 answers:

mr Goodwill [35]3 years ago

7 0

it is number 2 and 3 the rainfall moves from the mountain and moves toward the ocean

AlladinOne [14]3 years ago

7 0

The correct answer for this question is 2. As water condenses, its form will go from steam to water, usually in small droplets that get larger over time, with more condensation forming. In this case, the water condensing would be the water vapor forming clouds suspended in the sky, so as previously stated, your answer would be 2.

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A 1 l container contains O2 gas at stp. if the diameter of the O2 molecule is 3.75 * 10^-10 m the mean free path of the o2 molec

Luba_88 [7]

The mean free path of the O₂ molecule is $5.97*10^{-5}$ m.

The mean free path of the O₂ molecule is calculated by the formula -

λ = $\frac{1}{\sqrt{2}*\pi *d^{2}*n}$

In this formula, λ represents mean free path of gas, d represents diameter and n is number of molecules.

As per the known fact, 1 mole of gas occupies 22.4 liter at STP.

So. 1 liter of O₂ gas will have number of moles = $\frac{1*1}{22.4}$

Number of moles = 0.045

Also, we are aware that 1 mole contains $6.02*10^{23}$ molecules.

So, 0.045 moles will contain number of molecules = $6.02*10^{23}*0.045$

Number of molecules = $2.7*10^{22}$ molecules

Now, keeping the values in formula to find mean free path of gas -

λ = $\frac{1}{1.4*3.14*(3.75*10^{-10})^{2} *2.7*10^{22} }$

λ = $\frac{1}{16746.7}$

λ = $5.97*10^{-5}$ m

Hence, the mean free path of the O₂ molecule is $5.97*10^{-5}$ m.

Learn more about calculation of mean free path -

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8 0

2 years ago

20 points

Bezzdna [24]

Answer:

The answer to your question is below

Explanation:

In sodium chloride, its atoms are attached by ionic bonding.

In sucrose, its atoms are attached by covalent bonding.

Characteristics of substances that have ionic bonding high melting and boiling points, they conduct electricity in solution, are crystals, ionic bonding is stronger than covalent bonding.

Characteristics of substances that have covalent bonding have low melting and boiling points, they do not conduct heat or electricity, covalent bonding is a weak bond.

According to the previous description, the correct answer is " Sodium chloride has a higher boiling point than sucrose"

8 0

3 years ago

What is the difference between a chemical and physical reaction?

vladimir2022 [97]

Explanation:

Difference between physical and chemical change are several and it is important to understand them to be able to understand these topics better. The comparisons and differences between physical change and chemical change are given below along with their examples.

6 0

3 years ago

What are a physical properties?

pychu [463]

Physical properties include: appearance, texture, color, boiling point, melting point, ect.

7 0

3 years ago

Identify each type of titration curve. note that the analyte is stated first, followed by the titrant.

Ghella [55]

Each of the type of titration curve are as follows: Strong acid-strong base= starts small than increases<span>Weak acid-strong base= low then high (small difference) Weak base- strong acid= high to low. Have in mind that titraton curves generally contain the volume of the titrant as the independent variable and the ph of the solution as the dependent variable. </span>

8 0

3 years ago