Which statement is true about obligate anaerobes? view available hint(s) which statement is true about obligate anaerobes? they obtain energy by oxidizing ferrous ions. they will use o2 if it is present, but may obtain energy by fermentation if needed. they use o2 for cellular respiration and cannot grow without it. they are poisoned by o2. they live exclusively by cellular respiration or by anaerobic respiration.

Classify this reaction: 2al+n2-> aln.

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?