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vampirchik [111]
2 years ago
5

O.25 moles of SO₂ will contain

Chemistry
1 answer:
ad-work [718]2 years ago
6 0

Explanation:

number of mole s of H

2

= 0.25 moles

number of molecules = moles * Avogadro’s Number

number of molecules = 0.25×(6.022×10

23

)

number of molecules = 1.505×10

23

single molecule of hydrogen contains two H-atoms. So,

number of atoms = 2×(1.505×10

23

) = 3.01×10

23

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The density of acetonitrile (CH3CN) is 0.786 g/mL, and the density of methanol (CH3OH) is 0.791 g/mL. A solution is made by diss
ololo11 [35]

Answer:

The answer to your question is  0.22

Explanation:

Data

Acetonitrile (CH₃CN) density = 0.786 g/ml

Methanol (CH₃OH) density = 0.791 g/ml

Volume of CH₃OH = 22 ml

Volume of CH₃CN = 98.4 ml

Process

1.- Calculate the mass of Acetonitrile and the mass of Methanol

density = mass/ volume

mass = density x volume

Acetonitrile

        mass = 0.786 x 98.4

                  = 77.34 g

Methanol

        mass = 0.791 x 22

                  = 17.40 g

2.- Calculate the moles of the reactants

Acetonitrile molar mass = (12 x 2) + (14 x 1) + (3 x 1)

                                        = 24 + 14 + 3

                                        = 41 g

Methanol molar mass = (12 x 1) + (4 x 1) + (16 x 1)

                                      = 12 + 4 + 16

                                      = 32 g

Moles of Acetonitrile

                     41 g ----------------- 1 mol

                      77.34g ------------  x

                      x = (77.34 x 1) / 41

                      x = 1.89 moles

Moles of Methanol

                      32 g -------------- 1 mol

                       17.40 g ---------  x

                       x = (17.40 x 1)/32

                       x = 0.54 moles

3.- Calculate the mole fraction of Methanol

Total number of moles = 1.89 + 0.54

                                       = 2.43

Mole fraction = moles of Methanol / total number of moles

Mole fraction = 0.54/ 2.43

Mole fraction = 0.22  

6 0
4 years ago
35 POINTS!
Kobotan [32]

Answer:

A: A boulder that is falling after being pushed off a cliff.

C: A pebble in a slingshot before it has been shot.

Explanation:

These are examples of potential energy because they are holding energy before it is released.

Hope this helps

3 0
4 years ago
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Many sponges can reproduce asexually. Ladybugs, on the other hand, reproduce sexually.
ira [324]

Answer:

It can die

Explanation:

5 0
3 years ago
Aliyah marks a line on her driveway with a piece of chalk and another line 50ft away Then she stands with both feet at the line
Mariulka [41]

Answer:

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Explanation:

Aliyah must have been trying to find her speed.

The speed is a measure of how fast an object or a body is and it is calculated by finding the ratio of distance with time. Mathematically,

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<em>Hence, with the distance measured on the ground and Aliyah trying to find the time it will take her to cover the distance while running, she must have been trying to find how fast she can run, that is, speed. </em>

3 0
3 years ago
Given the balanced equation below, calculate the moles of aluminum that are needed to react completely with 17.5 moles of FeO? S
Sveta_85 [38]

The  moles  of Al that are needed to react completely  with 17 .5  moles  of FeO  is  11.67  moles

<u><em>calculation</em></u>

2Al +3 FeO  → 3 Fe + Al₂O₃

The moles of Al  is calculate using the mole ratio

That is; From equation above the  mole  ratio  of Al :FeO is 2:3  therefore the moles of Al

  = 17.5 moles x 2/3 = 11.67  moles

7 0
4 years ago
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