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e-lub [12.9K]
2 years ago
13

Silicon crystals are semiconductors. Which of the following is a correct reason for the increase in the conductivity of Si cryst

als when a small fraction of Si atoms are replaced with those of a different element?
A: P atoms introduce additional mobile negative charges.
B: P atoms introduce additional mobile positive charges.
C: Ge atoms have more electrons than Si atoms have.
D: Ge atoms are much smaller than Si atoms.
Chemistry
2 answers:
Flura [38]2 years ago
8 0

Answer:

c

Explanation:

it's correct I think and hope

melamori03 [73]2 years ago
3 0

Answer:

A is the right answer.. .............

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Eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
otez555 [7]

Answer:

<h3>option D</h3>

Explanation:

<h3>Is wire A connected to the light bulb </h3>

<h3>because it is series connection</h3>
8 0
3 years ago
In which type of chemical reaction do two or more substances combine to form one substance?
Stella [2.4K]
A) synthesis reaction
7 0
3 years ago
Read 2 more answers
What is the molar mass of Al2(SO4)3​
umka21 [38]

Answer:

The molar mass of Al_2(SO_4)_3​ is 342.145 g/mol

Explanation:

The molar mass  is stated as the “mass per unit amount of substance”of a given chemical compound  

Al_2(SO_4)_3​  is Aluminium sulphate. They easily dissolve in water. It is primarily  used as a 'coagulating agent' in the drinking water purification and also in waste and sewage water treatment plants,  

We know,

Atomic weight of Aluminium =  26.981

Atomic weight of Sulphur= 32.065

Atomic weight of  Oxygen =  15.9994

Now molar mass of  Al_2(SO_4)_3​ (Aluminium sulphate) is

=>2(26.981)+3(32.065+4(15.999))

=>53.962 +3(32.065+63.996)

=>53.962+3(96.061)

=>53.962+288.183

=>342.145

4 0
3 years ago
Can someone help me please and please show work
FinnZ [79.3K]

Answer:

Average of the trial is: 288.50 C

Percent Error: 3.83%

Explanation:

(291 + 287 + 295 + 281) : 4 = 288.50 C

Average: 288.50 C

Percent Error: {(300 - 288.50) : 300} x 100%  = 3.83 %

                   

4 0
3 years ago
What principle chemistry​
NNADVOKAT [17]
Is this a question ?
8 0
3 years ago
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