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(a) In your own words, explain how donor impurities in semiconductors give rise to free electrons in numbers in excess of those generated by valence band–conduction band excitations. (b) Also, explain
asked
Feb 4, 2020
Engineering
college
1
answer
5
votes
228k
views
Calculate the ph of a solution that is 0.6 m in sodium acetate and 0.2 m in acetic acid. ka = 1.8 × 10−5 for acetic acid. 1. ph = 4.3 2. ph = 4.7 3. ph = 5.2 4. ph = 2.7 5. ph = 5.6
asked
Oct 9, 2019
Chemistry
college
2
answers
0
votes
126k
views
How many British Pounds are in 314 Japanese Yen? (1 British Pound = $1.50; 107 Yen = $1.00)
asked
Oct 1, 2019
Mathematics
high-school
2
answers
5
votes
44.9k
views
Need help ASAP The graph shows the taxi fare, y, in a city, for a distance of x kilometers.
asked
Sep 24, 2019
Mathematics
middle-school
2
answers
4
votes
79.8k
views
A. A mother is 1 3/8 times as tall as her daughter. The girl is 1 1/3 times as tall as her brother. The mother is how many times as tall as her son? B. If her son is 3 feet tall, how tall is his mother?
asked
Jul 15, 2018
Mathematics
middle-school
1
answer
4
votes
176k
views
What can geographers map with remotely sensed data?
asked
Mar 12, 2018
Computers & Tech
high-school
1
answer
3
votes
168k
views
A bridge is an example of something that is usually provided as a _________? in economics.
asked
Nov 25, 2017
Social Studies
high-school
1
answer
2
votes
113k
views
Convert 8.132132132 … to a rational expression in the form of a over b, where b ≠ 0.
asked
Sep 14, 2017
Mathematics
middle-school
2
answers
5
votes
104k
views
What is the decimal equivalent o the rational number 6/11
asked
May 24, 2017
Mathematics
middle-school
1
answer
4
votes
115k
views
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