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andreyandreev [35.5K]

2 years ago

10

What’s the difference between 2o and o(subscript 2)?

1 answer:

tatuchka [14]2 years ago

5 0

Answer:

2O is an atom while O2 Is a molecule

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Calculate the number of moles of carbon dioxide formed when 40.0 moles of oxygen is consumed in the burning of propane. Note the

joja [24]

The first step is to balance the equation:

<span>C3H8 + 5O2 ---> 3CO2 + 4H2O

Check the balance

element left side right side

C 3 3
H 8 4*2 = 8
O 5*2=10 3*2 + 4 = 10

Then you have the molar ratios:

3 mol C3H8 : 5 mol O2 : 3 mol CO2 : 4 mol H2O

Now you have 40 moles of O2 so you make the proportion:

40.0 mol O2 * [3 mol CO2 / 5 mol O2] = 24.0 mol CO2.

Answer: option D. 24.0 mol CO2
</span>

7 0

3 years ago

How will you separate a solution of benzene and chloroform?

Troyanec [42]

Answer:

$\huge\boxed{\sf Distillation}$

Explanation:

State of benzene at RTP = liquid
State of chloroform at RTP = liquid
Boiling point of benzene = 80.1 °C
Boiling point of chloroform = 61.2 °C

Since, both of the chemicals are liquids, we can separate it by the process of distillation.

<u>Distillation:</u>

is the process in which we separate two liquids on the basis of their difference in boiling points.

<u>How it works:</u>

Since chloroform has less boiling point, it will evaporate and collected first and benzene will follow it after sometime.

- Apparatus of distillation is in the attached file.

$\rule[225]{225}{2}$

7 0

2 years ago

How Earth and the sun move in space relative to each other

liberstina [14]

The two theories were:

1.Geocentric theory stating that earth is the centre of the universe and sun revolves around it.

2.Heliocentric theory stating that the earth revolves around the sun.

6 0

2 years ago

The coastal region upon which the waves in the following image are breaking most likely has

oksian1 [2.3K]

That is a steep slope for sure, no doubt about it. Hope this helps!

7 0

2 years ago

Read 2 more answers

4) Ethanol has a density of 0.8 g/cm3. <br> What is the mass of 225 cm3 of ethanol

AveGali [126]

Answer:

$\huge\boxed{\sf m = 180\ g}$

Explanation:

<u>Given:</u>

Density = ρ = 0.8 g/cm³

Volume = V = 225 cm³

<u>Required:</u>

Mass = m = ?

<u>Formula:</u>

m = ρV

<u>Solution:</u>

m = (0.8)(225)

m = 180 g

$\rule[225]{225}{2}$

Hope this helped!

<h2>~AnonymousHelper1807</h2>

7 0

2 years ago