Biology, 02.10.2019 07:20 Pmedellin27
Astudent designs an experiment to test substances x, y, and z, to determine which one is a catalyst for the reaction: a + b ® c. only one of the unknown substances is a catalyst, and the others are nonreactive with a, b, or c. when 10 ml of a is added to 10 ml of b, the reaction takes twenty seconds. bubbles form when the product c is created. the student prepares three test tubes, each containing both reactants a and b. she adds unknowns x, y, and z to test tubes 1, 2, and 3, respectively. she then times the reaction in each test tube from the point when the unknown is added until bubbling stops. how can the student identify the catalyst? the test tube that stops bubbling first contains the catalyst. the test tube that produces the most bubbles contains the catalyst. the test tube that bubbles the longest contains the catalyst. the test tube that does not bubble contains the catalyst.
Answers: 1
Biology, 22.06.2019 01:30
Jane is blood type a her husband is blood type b. jane is puzzled because their daughter is type o. explain how the daughter inherited a blood type that neither of her parents had explain your answer
Answers: 1
Biology, 22.06.2019 23:20
Select all the correct answers. which statements fail to meet the requirements of a scientific claim? a) in the final 100 meters of a 10,000-meter race, an athlete's speed is more strongly related to anaerobic efficiency than to aerobic efficiency. b) flowers that reflect the most ultraviolet light are more likely to attract bees and other pollinators than flowers that reflect less ultraviolet light. c) even though evidence indicates that the solar system's planets follow elliptical paths, copernicus's model involving circular orbits is true. d) the evidence supporting newton's laws of motion was accurate in newton's time, but the universe operates differently today.
Answers: 2
Biology, 23.06.2019 02:30
If a dna molecule has 100 nucleotides and 22 of them are cytosine, how many thymines does it have?
Answers: 1
Astudent designs an experiment to test substances x, y, and z, to determine which one is a catalyst...
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