Chemistry, 14.09.2021 17:40, emfastback8868
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In a science class, students are challenged to create heat through a chemical reaction. The challenge is to melt an ice cube as quickly as possible. A
student decides to dissolve calcium chloride (salt) in water. When calcium chloride is dissolved in water, it creates an exothermic reaction. The student
places the calcium chloride and water in a plastic bag and then places the ice cube on top of the bag.
Which of these would increase the heat generated and reduce the time it takes the ice cube to melt?
Increasing the size of the ice cube to be melted.
Increasing the amount of calcium chloride placed in the bag.
Increasing the size of the plastic bag.
Dropping the ice cube in the bag with the calcium chloride and water and then shaking the bag.
Putting more water and less calcium chloride in the bag.
Doubling the size of the plastic bag and doubling the amount of water and calcium chloride used,
Nature of Science
Answers: 3
Chemistry, 22.06.2019 21:50, namoralessimon03
28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action
Answers: 1
Chemistry, 23.06.2019 06:50, isabellainksow87vn
The student repeated the experiment using a higher concentration of acid. the same volume of acid and the same mass of magnesium ribbon were used. what volume of hydrogen gas would have been produced after 60 seconds?
Answers: 1
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