answer.
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
vovikov84 [41]
2 years ago
8

A researcher is designing a laboratory experiment to determine whether the inorganic substance A affects the rate of a reaction

between two colored liquids, X and Y. When the reaction is complete, the liquid is clear. The reaction between X and Y is similar to one used by manufacturers to produce certain chemicals in factories. Which method would best answer his question about reaction rate and what will he find out about substance A?
First, he should measure the final temperature of the liquid when X and Y react without substance A. Then, he should measure the final temperature when he adds substance A to X and Y. He will find out if substance A is a catalyst.

First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst.

First, he should measure the final temperature of the liquid when X and Y react without substance A. Then, he should measure the final temperature when he adds substance A to X and Y. He will find out if substance A is an enzyme.

First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is an enzyme.
Biology
2 answers:
antoniya [11.8K]2 years ago
8 0
The answer would be First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is an enzyme.
nlexa [21]2 years ago
3 0
The corrrect option is D.
Since the scientist was trying to determine if substance A affect the rate of reaction of X and Y, the best thing to do is to make substance X and Y to react together first, he should then measure the time taken for the reaction to take place. Next, he should make X and Y to react together again, but this time in the presence of A. The time taken for the reaction to occur should be measures. The scientist can now compared the two time measurements and decide if there are difference between them or not. 
You might be interested in
Alkylating agents work to prevent the cell from replicating its genetic material, thus preventing cell division. which checkpoin
Anna11 [10]
<span>Since alkylating agents work to prevent the cell from replicating its genetic material, the cell would most likely stop at the interphase checkpoint, which is the phase before mitosis (which consists of prophase, metaphase, anaphase, and telophase). During interphase, the cell replicates its genetic material (DNA), but this would be prohibited by alkylating agents.</span>
4 0
2 years ago
A micrograph of dividing cells from a rat, a diploid animal, shows a cell where 21 pairs of sister chromatids are being pulled a
Elanso [62]

Answer:

<h2>b) Anaphase II of meiosis </h2>

Explanation:

1. Meiosis is the process of cell division in which one cell is divided into four daughter cell, each contains equal number of chromosome, half the number of chromosomes as compared to parental cell.

2. In meiosis I, DNA duplication occurs but the sister chromatids are not separated, only homologous pair of chromosomes are separated, so this is called reductional division.

3. In meiosis II, chromatids are pulled apart and and are separated into different chromosomes, so it is called equational division. There is no DNA duplication in meiosis II.

8 0
2 years ago
How does music affect plant growth? To answer this question, Dr. Anderson set up an experimental chamber and exposed a group of
xxTIMURxx [149]

Answer:music helps plants grow faster

Explanation:

3 0
2 years ago
A client had a thrombotic cerebrovascular accident and now has flaccid hemiplegia of the right side.
Alina [70]

Answer:

a) when the client is admitted to the hospital.

Explanation:

Rehabilitation for a client who has an injury, a cerebrovascular accident, starts at the period of admission to the clinic.

The first aim of rehabilitation is to further avoid deformities.

This can be done via techniques as positioning the client in the right position in bed, adjusting the client's position with time, and making sure every part of the client body is in proper positioning.

5 0
2 years ago
How is phosphorus transferred between animals and soil at N​
Dovator [93]

Phosphorus moves in a cycle through rocks, water, soil and sediments and organisms. Over time, rain and weathering cause rocks to release phosphate ions and other minerals. Once in the plant or animal, the phosphate is incorporated into organic molecules such as DNA. i hope this helped <3

8 0
2 years ago
Read 2 more answers
Other questions:
  • What type of cell is responsible for immunity against intracellular pathogens?
    12·1 answer
  • In 1838, Matthias Schleiden published his observation that plant tissues are composed of cells. A year later, Theodor Schwann pu
    7·1 answer
  • Choose a plant tissue. Write an explanation of how that tissue’s structure relates to its function. Be specific and detailed.
    8·2 answers
  • Hormones are _____. see concept 45.1 (page 998) signals that must interact with dna in order to be effective always proteins pro
    6·1 answer
  • Matt suffered slight burns in an accident. When the skin burns, it loses some of its functions. First-degree burns affect the to
    14·2 answers
  • Molecule x moves across a cell membrane by diffusion. which row in the chart below best indicates the relationship between the r
    14·1 answer
  • Maria, a U.S. psychologist uses the DSM-5 in her practice, but her cousin, Ava, lives in Spain and often uses the ________ for c
    5·2 answers
  • The flu vaccine (administered as a shot or a nasal spray) is made of a combination of the different types of influenza viruses t
    14·1 answer
  • Oceans formed when rainwater filled basins 3.8 billion years ago. ________ run into the ocean dissolving minerals like salt as t
    15·1 answer
  • Some tools have various levels of graduations. For example, a ruler may have graduations for both millimeters and centimeters. W
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!