Question 1 (4 points)
(01.05 MC)
During an experiment a thermometer was placed in a beaker co...
Question 1 (4 points)
(01.05 MC)
During an experiment a thermometer was placed in a beaker containing hydrogen peroxide. The following observations were recorded when
yeast granules were added to hydrogen peroxide.
Observation 1: Fizzing and bubbling took place.
Observation 2: The temperature began to rise.
Based on the observation, justify the type of change (physical or chemical) that took place. (4 points)
Answers: 3
Chemistry, 22.06.2019 14:20
Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments
Answers: 1
Chemistry, 22.06.2019 23:00
What is the most common reason for matter changing its state?
Answers: 1
Chemistry, 23.06.2019 08:50
Why are enzymes important to cells? they bring about chemical reactions. they provide structural support. they form the two layers of membranes. they store large quantities of energy.
Answers: 2
Law, 10.12.2020 04:00
Mathematics, 10.12.2020 04:00
Chemistry, 10.12.2020 04:00
Mathematics, 10.12.2020 04:00
History, 10.12.2020 04:10
Physics, 10.12.2020 04:10
Social Studies, 10.12.2020 04:10