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natima [27]
4 years ago
11

26. At high temperatures these elements conduct electricity but at lower temperatures they do not conduct electricity. This make

s them useful in electronic devices. What are these elements?
explain answer
Chemistry
2 answers:
LenaWriter [7]4 years ago
4 0

A semiconductor conducts electricity at high temperatures, but not at low temperatures. At high temperatures, metalloids act like metals and conduct electricity.

Explanation:

start using quizlet. it has every anwser

DochEvi [55]4 years ago
3 0
Its all on quizlet.........
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Sodium bicarbonate (NaHCO3) is commercially known as baking soda. How many grams and atoms of oxygen are there in 15 grams of so
ella [17]

Answer:

3 atoms of O

8.57g

Explanation:

The problem here is to find the mass of oxygen in the compound and the number of atoms of oxygen.

 The formula of the compound is:

 NaHCO₃;

   Here we have:

      1 atom of Na

     1 atom of H

     1 atom of C

     3 atoms of O

So there are 3 atoms of O

To find the mass of oxygen , we use the molar mass of oxygen;

     Molar mass of oxygen  = 16g/mol

 Mass of oxygen  = \frac{3(16)}{84.01}  x 15  = 8.57g

4 0
3 years ago
The noun field has several meanings. You have learned one meaning. Give two other meanings for field.
AlekseyPX

Answer:

an open area, one typically with crops. a particular branch of a study or interest.

Explanation:

4 0
3 years ago
if you drop a 50 gram piece of metal with a temperature of 125° Celsius into 1000 grams of water at 20° Celsius, what best descr
Ymorist [56]
As soon as the metal gets into the water a temperature transfer will start between both of them resulting in  

1. Metal will cool down. 
2. Some water will get evaporated.
3. Temperature of water will rise.
4. As the metal gets into the water, a sound like chissssss will be heard.

Hope it helps.
Don't be shy and say thx.<span />
8 0
3 years ago
John dalton was the first person recorded as thinking that matter was ultimately composed of atoms. true or false
Alona [7]

<span>The statement is false. It was Democritus, a Greek philosopher, who first theorized that matter was ultimately composed of atoms. His ideas were not widely accepted in his time (460-370 B.C), but during the 19th century, John Dalton proposed this theory and gained broad acceptance.</span>

3 0
3 years ago
Read 2 more answers
Calculate the ratio of effusion rates of oxygen (o2) to hydrogen (h2)
Gemiola [76]
The  ratio of  effusion   of   rates of  oxygen  (O2)   to Hydrogen (H2)  is   calculated  as  follows

rate  of  O2/  rate of H2  =  square root  of   molar  mass  of  H2/molar  mass of O2  

=  square  root  =  2 /32  = 0.25
8 0
4 years ago
Read 2 more answers
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