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3 years ago

If any girl want to be my girlfriénd?

Chemistry

2 answers:

Dafna1 [17]3 years ago

7 0

Answer:

I can be a friend if u need

ivanzaharov [21]3 years ago

7 0

my guys just looking for a reaction in the chemistry tab

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Compare the boiling points of alcohol, ethers and alkanes and explain one reason for the difference

scoundrel [369]

Alcohols have higher boiling points than do ethers and alkanes of similar molar masses.

<h3>What is meant by Boiling Point ?</h3>

The temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid is called the boiling point of the substance.

Approximately boiling point of Ethanol: 78.4°C, ether: 34.6°C, ethanes: 68°C

The reason for the difference is that it takes more energy to separate alcohol molecules then it does to separate alkane molecules and ether molecules.

The OH group in alcohol allows molecules to engage in hydrogen bonding.

Therefore Boiling point are in the order ;

Alcohol > alkane > ethers

To know more about Boiling Point

brainly.com/question/2153588

#SPJ1

8 0

2 years ago

A bottle of wine contains 12.8% ethanol by volume. The density of ethanol (CH3OH) is 0.789 g/cm. Calculate the concentratic etha

Scrat [10]

Answer : The mass percent of ethanol is, 10.38 % and the molality of ethanol is, 2.52 mole/kg

Explanation :

In wine, the solute and solvent are ethanol and water respectively.

Given :

12.8 % ethanol by volume means 12.8 mL ethanol present in 100 mL solution.

Volume of ethanol = 12.8 mL

Volume of solution = 100 mL

Volume of water = 100 - 12.8 = 87.2 mL

Density of ethanol = $0.789g/cm^3=0.789g/mL$

Density of water = 1 g/mL

Now we have to calculate the mass of ethanol and water.

$\text{Mass of ethanol}=\text{Density of ethanol}\times \text{Volume of ethanol}=0.789g/mL\times 12.8mL=10.1g$

and,

$\text{Mass of water}=\text{Density of water}\times \text{Volume of water}=1g/mL\times 87.2mL=87.2g$

Now we have to calculate the total mass of 100 mL of wine.

Total mass of 100 mL of wine = 10.1 + 87.2 = 97.3 g

Now we have to calculate the mass percent of ethanol.

$\text{Mass of percent of ethanol}=\frac{\text{Mass of ethanol}}{\text{Total mass of solution}}\times 100$

$\text{Mass of percent of ethanol}=\frac{10.1g}{97.3g}\times 100=10.38\%$

The mass percent of ethanol is, 10.38 %

Now we have to calculate the molality.

$Molality=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Mass of solvent}}$

Molar mass of ethanol = 46 g/mole

$Molality=\frac{10.1g\times 1000}{46g/mole\times 87.2g}=2.52mole/kg$

The molality of ethanol is, 2.52 mole/kg

6 0

3 years ago

Stored energy due to position is know as blank energy

Drupady [299]

Answer:

Potential energy

Explanation:

Potential energy is the energy possed by an object at rest. It is otherwise referred to as the stored energy due position.

6 0

3 years ago

Ammonia and hydrogen fluoride both have unusually high boiling points due to

nexus9112 [7]

Answer:

C. hydrogen bonding

Explanation:

Ammonia and hydrogen fluoride are both able to exhibit hydrogen bonding due to containing nitrogen (in ammonia) and fluoride (obviously in hydrogen fluoride). Remember the unique qualities of NOF. :)

5 0

3 years ago

If a gold bar is 16,000 g mass and 800 cm^3 volume what is the density?

ki77a [65]

Answer:

<h3>The answer is 20 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 16,000 g

volume = 800 cm³

We have

$density = \frac{16000}{800} = \frac{160}{8} \\$

We have the final answer as

Hope this helps you

5 0

3 years ago

If any girl want to be my girlfriénd?​

If any girl want to be my girlfriénd?