subject
Chemistry, 14.09.2021 17:40 emfastback8868

Click to select the correct answers. Click again to unselect answers. Leave the incorrect 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

ansver
Answers: 3

Another question on Chemistry

question
Chemistry, 22.06.2019 05:00
Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?
Answers: 2
question
Chemistry, 22.06.2019 16:00
About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?
Answers: 2
question
Chemistry, 22.06.2019 16:30
How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4
Answers: 3
question
Chemistry, 23.06.2019 05:30
Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?
Answers: 1
You know the right answer?
Click to select the correct answers. Click again to unselect answers. Leave the incorrect In a sci...
Questions
question
History, 20.11.2021 07:50
question
History, 20.11.2021 07:50
Questions on the website: 13722367