Question 1: Which is not a clue that a chemical change has happened?
A. new substance is forme...
Chemistry, 04.05.2020 22:32 jlluminate5635
Question 1: Which is not a clue that a chemical change has happened?
A. new substance is formed B. temperature change C. size change D. gas is produced
Question 2: Which of the following represents chemical change?
A. wood burning B. ice freezing C. sugar dissolving D. wood being sanded
Question 3: Which of the following food changes represents a physical change?
A. toasting bread B. baking a cake C. making chocolate milk D. cooking an egg
Question 4: Which of the following is an example a chemical change?
A. water evaporating B. melting ice C. food rotting D. boiling water
Answers: 3
Chemistry, 22.06.2019 09:40, kolibeilfuss
Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.
Answers: 3
Chemistry, 22.06.2019 12:00, shifaxoxoxo
What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist
Answers: 2
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