Questions by Roshna Omer

Questions by Roshna Omer

(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

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

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

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

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

1 answer

4 votes

176k views

What can geographers map with remotely sensed data?

asked Mar 12, 2018

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

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

2 answers

5 votes

104k views

What is the decimal equivalent o the rational number 6/11

asked May 24, 2017

1 answer

4 votes

115k views

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