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kari74 [83]
3 years ago
10

The diagram below shows the stars that are nearest to our solar system.

Chemistry
1 answer:
GrogVix [38]3 years ago
5 0

Answer:

kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

Explanation:

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What is the correct electron configuration of the element with atomic number 20?
IgorLugansk [536]

Answer:

D is the correct answer

s orbital contain 2

p orbital contains 6

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3 years ago
A solution is made by mixing equal masses of methanol, CH 4 O , and ethanol, C 2 H 6 O . Determine the mole fraction of each com
Fynjy0 [20]

Answer:

Mole fraction of CH_4O = 0.58

Mole fraction of C_2H_6O = 0.42

Explanation:

Let the mass of CH_4O and C_2H_6O = x g

Molar mass of CH_4O = 33.035 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles_{CH_4O}= \frac{x\ g}{33.035\ g/mol}

Moles_{CH_4O}=\frac{x}{33.035}\ mol

Molar mass of C_2H_6O = 46.07 g/mol

Thus,

Moles= \frac{x\ g}{46.07\ g/mol}

Moles_{C_2H_6O}=\frac{x}{46.07}\ mol

So, according to definition of mole fraction:

Mole\ fraction\ of\ CH_4O=\frac {n_{CH_4O}}{n_{CH_4O}+n_{C_2H_6O}}

Mole\ fraction\ of\ CH_4O=\frac{\frac{x}{33.035}}{\frac{x}{33.035}+\frac{x}{46.07}}=0.58

Mole fraction of C_2H_6O = 1 - 0.58 = 0.42

6 0
4 years ago
What is all of the living organisms on earth and the places they live in?
romanna [79]

Answer:

Biosphere

Explanation:

The biosphere is the area of Earth where living things exist. The biosphere is divided into regions known as biomes. In general, biomes are areas with a particular type of climate and similar plant and animal species.

8 0
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What is Non Metal?<br><br>help me find ​
Y_Kistochka [10]

The element which can not loose electron easily and having electronagtive character is called non-metal it has following property-

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2. it is netiher ductile not malleable

3. it is not lsuturous and also not sonorous

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3 years ago
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Answer:

Foam fight is a chemical change.

Explanation:

Please give me brainliest :)

4 0
3 years ago
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