7. Mr. Wurtz performed a demonstration for his science students in a well-ventilated room. He mixed together two samples of different white powdery substances in an open beaker. The dry mixture soon became wet, and the students could smell ammonia. The temperature of the beaker dropped dramatically, so much so that the liquid that formed in the beaker began to freeze. A liquid formed at the bottom of the beaker. The temperature of the mixture dropped dramatically. Powder 2 Ammonia Odor O Agas with a strong smell was released from the mixture. time The powdery substances dissolved in the water. Icy Solution CLEAR ALL Powder 1 Mr. Wurtz told the class that a chemical reaction had occurred inside the beaker. Which of the following is not evidence that a chemical reaction occurred?A. A liquid at the bottom of the breaker B. The temperature of the mixture drop dramatically. C. A gas with a strong smell was released from the mixture. D. the powdery substances dissolved in the water.
Answers: 2
Biology, 22.06.2019 09:10, dmarte11092001
Explain the cellular functions that occur when antibiotics attack a bacteria cell. a. antibiotics target the cell wall, cell membrane, and the processes of protein and nucleic acids production in bacteria to rupture the cell. b. antibiotics create dormant resistant endospores to preserve the genetic material and rupture the cell. c. antibiotics target the cell wall and form a bridge-like connection to form conjugation. d. antibiotics use binary fission to grow twice its size, replications its dna, and split into two cells.
Answers: 2
Biology, 22.06.2019 13:30, derpoofoofderp
The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?
Answers: 1
7. Mr. Wurtz performed a demonstration for his science students in a well-ventilated room. He mixed...
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