Chemistry, 28.01.2021 01:10, griffinalexis2780
A class of students is designing a carrier to help keep foods warmer during long-distance trips. The students plan to use a
chemical reaction to help keep the carrier and the food warm. The students have collected temperature data over time
using four different chemical reactions, as shown in the table.
Temperature Reaction 1 Reaction 2 Reaction 3 Reaction 4
Measurement
start of
23°C
reaction
23°C 23°C 23°C
2 minutes 26°C
90°C
20°C 8°C
10 minutes 36°C 84°C 18°C 17°C
60 minutes 68°C 62°C 14°C 19°C
180 minutes 75°C 29°C 11°C 22°C
Part A
Based on the temperature data in the table, which chemical reaction should the students use for their food carrier
design?
A Reaction 1
B Reaction 2
C Reaction 3
Reaction 4
Answers: 2
Chemistry, 22.06.2019 17:30, llamasking
Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
Answers: 2
Chemistry, 23.06.2019 01:50, UncleVictor5188
Ablock of aluminum is dropped into a graduated cylinder with an initial volume of water at 75ml and the volumes rises to 90ml. if the block has a mass of 40.5 g what is its density ?
Answers: 1
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