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
Lunna [17]
3 years ago
12

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?
A.The test tube that stops bubbling first contains the catalyst.
B.The test tube that produces the most bubbles contains the catalyst.
C.The test tube that bubbles the longest contains the catalyst.
D.The test tube that does not bubble contains the catalyst.
Biology
1 answer:
rewona [7]3 years ago
7 0

The answer is option A.

The Student identifies the test tube that stops bubbling first contains the catalyst.

Because Catalyst is a substance which increases the rate of reaction, and the reaction shows that when a product is obtained bubbles formed.

<span>When the student added X, Y and Z to the test tubes. The one which is a catalyst fastened the reaction.</span>

You might be interested in
Draw a trophic pyramid using the animals in the Chesapeake Bat ecosystem. Include the percentage of energy at each level. In you
ArbitrLikvidat [17]

Answer:

four trophic levels

Explanation:

All food chains and webs have at least two or three tropic levels. Generally, there are a maximum of four tropic levels. Many consumers feed at more than one tropic level.

4 0
3 years ago
Help please! I belive the answer is NOT C because that happens in S phase, so isn't the answer A?​
Leto [7]

Answer:

YEA IT IS a.

Explanation:

7 0
3 years ago
Read 2 more answers
How does the large intestine prepares wastes for elimination?<br><br>asap plz
erma4kov [3.2K]
The wastes are in a liquid state,as they pass through the colon, which is the second part of the large intestine, excess water is absorbed. The remaining solid wastes are called feces. Feces accumulate in the rectum, which is the third part of the large intestine.
4 0
3 years ago
Read 2 more answers
What is a negative effect of photosynthesis for the carbon cycle?
r-ruslan [8.4K]
<span>

with more atmospheric carbon dioxide to convert to plant matter in photosynthesis, place able to grow more. Photosynthesis has no negative effect on Carbon Cycle. Carbon Cycle has a negative effect on photosynthesis.
More Carbon dioxide is not necessarily needed in Photosynthesis. </span>
6 0
3 years ago
30 points
puteri [66]

Answer:

i believe the answer is c

Explanation:

5 0
3 years ago
Other questions:
  • Can a nerve cell be found in the g0 phase
    8·1 answer
  • DDT was used to do what? A. fetralizinh soil B. kill insects C. form ozone D. feeding animals
    7·1 answer
  • How do hormones move around the body
    7·2 answers
  • All of the organisms are important as producers in the food chain and as producers of oxygen, with the exception of?
    11·1 answer
  • Mr. Krabs created a secret ingredient for a breath mint that he thinks will “cure” the bad breath people get from eating crabby
    12·2 answers
  • 1. What energy sources and processes of energy drive the global circulation of water in the oceans?
    9·2 answers
  • 1. The energy that cells need for cellular processes
    11·1 answer
  • What is the monomer (building block) of proteins?
    12·2 answers
  • How to get fake fever​
    15·2 answers
  • While biodiversity includes the number of species in a given area, it also includes:_________
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!