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Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section: Chapter Questions
Problem 110SCQ: Peanuts and peanut oil are organic materials and bum in air. How many burning peanuts does it take...
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2 b
For each question, appor reasonable work according to your discretiol are heeded to release 49 000 | of heat? (3 marks- 2 marks for work, 1 mark for answer) ) If burning 100g.of sugar (glucose) releases 1560 kl of heat, how many mail 4x41945 - 16736J Toog G Releases = 1560 kj 147BLJ heat Releie Ig sugar 49006 -2.92g T6730 2) A light-year is a non-SI unit with a length of the distance that light travels in one year a vacuum. The speed of light is 300 000 000 meters per second. (5 marks total) a) What is the distance of a light-year in metres? (3 marks) 以 Booddobo0 distance < spees xtrme THac)se 3x10*m/s x 3.2X107s =9.6x lo'm A b) What is the distance of a light-year in kilometres? (2 marks 1 mark for work, 1 mark for correct answer) According to our best astronomy, the observable universe is about 91 billion light years in diameter. What is the diameter of the observable universe in gigametres? (3 marks- 2 marks for work, 1 mark for correct answer)
Transcribed Image Text:For each question, appor reasonable work according to your discretiol are heeded to release 49 000 | of heat? (3 marks- 2 marks for work, 1 mark for answer) ) If burning 100g.of sugar (glucose) releases 1560 kl of heat, how many mail 4x41945 - 16736J Toog G Releases = 1560 kj 147BLJ heat Releie Ig sugar 49006 -2.92g T6730 2) A light-year is a non-SI unit with a length of the distance that light travels in one year a vacuum. The speed of light is 300 000 000 meters per second. (5 marks total) a) What is the distance of a light-year in metres? (3 marks) 以 Booddobo0 distance < spees xtrme THac)se 3x10*m/s x 3.2X107s =9.6x lo'm A b) What is the distance of a light-year in kilometres? (2 marks 1 mark for work, 1 mark for correct answer) According to our best astronomy, the observable universe is about 91 billion light years in diameter. What is the diameter of the observable universe in gigametres? (3 marks- 2 marks for work, 1 mark for correct answer)
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