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3 years ago

PLEASE ANSWER!! I NEED HELP :)

Chemistry

1 answer:

zzz [600]3 years ago

8 0

Answer:

This process is known as doping. It can be done by adding either of two types of impurity to the crystal. (A) By adding electron rich impurities i.e., group 15 elements to the silicon and germanium of group 14 elements.

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an unknown molecule is found to consist of 24.2% carbon by mass, 4.0% hydrogen by mass and the remaining mass is due to chlorine

Paha777 [63]

Answer:

C3 H6 Cl 3

Explanation:

C -24.2%

H - 4.0%

Cl - (100-24.2 - 4.0)=73.8 %

We can take 100g of the substance, then we have

C -24.2 g

H - 4.0 g

Cl - 73.8 g

Find the moles of these elements

C -24.2 g/12.0 g/mol =2.0 mol

H - 4.0 g/1.0 g/mol = 4. 0 mol

Cl - 73.8 g/ 35.5 g/mol = 2.1 mol

Ratio of these elements gives simplest formula of the substance

C : H : Cl = 2 : 4 : 2 = 1 : 2 : 1

CH2Cl

Molar mass (CH2Cl) = 1*12.0 +2*1.0 + 1*35.5 = 49.5 g/mol

Real molar mass = 150 g/mol

real molar mass/ Molar mass (CH2Cl) = 150 /49.5=3

So, Real formula should be C3 H6 Cl 3.

4 0

4 years ago

Read 2 more answers

which sample, when dissolved in 1.0 liter of water, produces a solution with the highest boiling point?

andrew-mc [135]

<span>The correct answer is (C) 0.2 mole MgCl2.

according to Van't Hoff factor rule which is the ratio between the actual

concentration of the particles produced when the substance dissolved and

the concentration of the substance as measured from its mass, so here 0.2

mole MgCl2 is the higher van't Hoff factor as it has more ions than other

choices and the higher concentration.

and when the boiling point formula is delta Tb = Kb * m * i.

when delta Tb is the change in boiling point.

and Kb is molal boiling point constant

and m is the molality of the solution

and i is Van't Hoff factor.

so we can see the relationship between i and delta Tb, the greater Van't Hoff factor the higher the boiling point. so 0.2 MgCl2 is the higher boiling point as it is the greater van't Hoff factor.</span>

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3 years ago

What are the phases of the moon and how does the sun's position create them?

charle [14.2K]

The phases of the moon are created by the earth passing in front of the sun between the sun and the moon.

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4 years ago

Explain how the cathode Ray was discovered?

lyudmila [28]

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4 years ago

A metallic material that is made by uniformly mixing copper with zinc to form bronze.

Airida [17]

YOU SUCK YOUR MOMS CHIVKEN NUGGA YOU WHODDDDDDD :))))))))) \\\

<h2>it is not dirty so do try it >:((((((</h2>

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3 years ago