Chemistry, 28.10.2019 20:31, 1940swannabe
When did the level of oxygen in earth's atmosphere become high enough to sustain aerobic respiration? when did the level of oxygen in earth's atmosphere become high enough to sustain aerobic respiration? 3.5 billion years ago 1.5 billion years ago 2.7 billion years ago 1.0 billion years ago
Answers: 2
Chemistry, 21.06.2019 16:20, maevemboucher78
Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2al(s)+3cl2(g)→2alcl3(s) what is the maximum mass of aluminum chloride that can be formed when reacting 32.0 g of aluminum with 37.0 g of chlorine? express your answer to three significant figures and include the appropriate units.
Answers: 2
Chemistry, 23.06.2019 06:00, wirchakethan23
When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.
Answers: 1
When did the level of oxygen in earth's atmosphere become high enough to sustain aerobic respiration...
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