In the reaction c5h8 + o2 --> 8h2o + 5co2, what coefficient should be placed in front of o2 to balance the reaction?
a. 5 b. 8 c. 9 d. no coefficient is needed

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Which of these conditions most likely produces an unstable isotope?