1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aalyn [17]
3 years ago
15

A student 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.
Biology
1 answer:
guapka [62]3 years ago
3 0
The effect of a catalyst is to increase the speed of the reaction, this is the speed at which reactants, A and B, are consumed, ant the product, C, is produced.


Given that when C is produced the solution bubbles, the bubbles are an indication of progression of the reaction.


The greater the speed of reaction, the earlier the reaction will end and the earlier the bubbles will stop.   


So the student can identify the catalyst because the bubbles will stop first.


Answer: <span>The test tube that stops bubbling first contains the catalyst.</span>
You might be interested in
Like complex carbohydrates, proteins are biomolecules that serve many functions and can be chemically broken down and restructur
VikaD [51]
I think the correct answer from the choices listed above is option A. Both proteins and complex carbohydrates are polymers of smaller subunits. They <span>are substances whose molecules have high molar masses and are composed of a large number of repeating units.</span>
8 0
3 years ago
Which of the following factors contributes to the distribution of biodiversity on Earth?
Aleksandr-060686 [28]

Answer:

Which of the following factors contributes to the distribution of biodiversity on Earth?

Inter-species interaction contribute greatly to the distribution of biodiversity on earth as it gives room for migration which helps to increase biodiversity

Explanation:

8 0
3 years ago
Read 2 more answers
Why is it that scientists have trouble when it comes to RNA viruses?
olchik [2.2K]
RNA viruses can copy themselves which is harder for scientists to give an accurate conclusion to solve them.
8 0
3 years ago
List four ways in which members of the same species can cooperate with each other.
ArbitrLikvidat [17]
Cooperation is common in non-human animals. Besides cooperation with an immediate benefit for both actors, this behavior appears to occur mostly between relatives.[1] Spending time and resources assisting a related individual may at first seem destructive to the organism’s chances of survival but is actually beneficial over the long-term. Since relatives share part of their genetic make-up, enhancing each other’s chances of survival may actually increase the likelihood that the helper’s genetic traits will be passed on to future generations.[6] The cooperative pulling paradigm is an experimental design used to assess if and under which conditions animals cooperate. It involves two or more animals pulling rewards towards themselves via an apparatus they can not successfully operate alone.[7]
7 0
3 years ago
How would a mistake in transcribing the DNA message affect your ability to catch the killer?
mel-nik [20]

Answer: When the DNA collected on the crime scene is being analysed in the forensic lab, the results will be inconclusive, because error in DNA transcription, particularly in mRNA encoding leads to inheritable phenotype change by reprogramming the transcriptional network, without changing the DNA. Transcription errors are brief with no long-term consequences. Due to mRNA being short-lived and the erroneous proteins are degraded. A decrease in transcription accuracy triggers cellular identity change.

Explanation: This is called epimutation, a heritable modification that results in the change of gene expression, but not the DNA sequence. Epimutation is not associated with DNA mutation, but is associated with the loss or gain of DNA methylation or other heritable changes of the chromatin.

6 0
3 years ago
Other questions:
  • In which type of treatment does the patient follow verbal prompts to envision a specific, peaceful location?
    12·1 answer
  • How dose the nervous system help the body maintain homeostasis
    10·1 answer
  • Plants do cellular respiration true or false
    6·1 answer
  • This is an organism or cell with two sets of chromosomes.
    9·2 answers
  • 1. What would happen if there wasn't any wind?
    11·2 answers
  • Which of the following statements about the formation of polypeptides from amino acids is true?
    9·2 answers
  • How do dendrites help the function of nerve cells? (1 point) A. They help the neuron receive messages from the dendrites of anot
    9·1 answer
  • Erin wishes she had taken notes in class because she could only remember the information from the last part of the lecture. This
    11·2 answers
  • How do scientists know living things are related to eachother? (there are two way)​
    14·1 answer
  • The oldest oceanic crust is
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!