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
choli [55]
3 years ago
14

What evidence in Lavoisier's twelve-day experiment showed that oxygen was chemically reacting (combusting) with substances? A) H

e obtained less of the gas as disappeared in the last experiment. B) Lavoisier noticed that about four-fifths of the air had been used up. C) He noticed that there was a gas that did not support life or burning. D) A red oxide of mercury was formed on the surface of the mercury in the retort.
Biology
2 answers:
OlgaM077 [116]3 years ago
8 0

The answer is D for surely positive guys

Jlenok [28]3 years ago
4 0
<span>B) He noticed four-fifths of the air had been used up. If by air this question is referring to oxygen, the fact that it has been used up means it has reacted, mean a substance has combusted.</span>
You might be interested in
Why doesnt pepsin, the enzyme released in the stomach to
Fiesta28 [93]

Answer: unfavourable ph condition for the pepsin

Explanation: during digestion, enzymes are needed to aid the process.digestive enzymes are biological catalyst that breakdown large food particles into digestible form .

As biological catalyst, enzymes require an optimum temperature and pH condition.outside this temperature or pH,the enzyme is denatured.

In the stomach, hydrochloric acid is required to convert pepsinogen into it's active form,pepsin.the acid also creates an optimum low pH that pepsin needs to function.

As the food moves to the small intestine,the pH is alkaline and is unfavourable for pepsin to function.

4 0
3 years ago
When a person is hooked up to a machine that will record myograms, a record of their muscle activity can be produced (depending
vodomira [7]

Answer:

Fused (complete) tentanus

Explanation:

4 0
3 years ago
When most proteins, fats, and carbohydrates are digested completely, they are converted to end products that?
nadezda [96]
The choices can be found elsewhere and as follows:

1.are soluble and can easily pass through cell membranes 
<span>2.contain long chains of amino acids and fatty acids </span>
<span>3.contain atoms of carbon, hydrogen, oxygen and nitrogen </span>
<span>4.are a direct result of dehydration synthesis
</span>
I believe the correct answer is option 1. When most proteins, fats, and carbohydrates are digested completely, they are converted to end products that are soluble and can easily pass through cell membranes. So as to distribute the nutrients needed in different parts of the body.
3 0
3 years ago
Read 2 more answers
What organ systems are involved when running?
djyliett [7]

Answer:

There are many different organ systems that are involved in when we exercise. The three main ones are the respiratory system which is involved in breathing, the circulatory system which circulates blood flow throughout the body and lastly the muscular system, as you use muscles when you are moving.

Explanation:

<em>I would appreciate brainliest, if not that's ok!</em>

7 0
3 years ago
Read 2 more answers
When a group of cells that have the same basic structure and function come together they form?
sveticcg [70]

Answer:

Tissue

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • HELP PLEEEEEEEEAAAAAAASSEEEEEEEEEEEE
    9·2 answers
  • Large veins arterioles capillaries large arteries 1. : site where resistance to blood flow is greatest. 2. : site where exchange
    7·1 answer
  • Which of these can be found in both gymnosperms and angiosperms?
    10·1 answer
  • Allen and his lab partner each held a tuning fork, frequency 440 Hz, in their hands. Allen tapped his tuning fork with a mallet
    15·2 answers
  • I need 5 paragraphs about global warming pleaseeee!!!
    9·1 answer
  • Marcus is taking a hiking trip in the mountains. He sees long scratches on the rock walls. The area was most likely eroded by a
    6·1 answer
  • What happend to addie in 2014
    15·1 answer
  • What is Acetyl-coA and how does it help with food digestion ?
    12·1 answer
  • two liquids that are at two different temperatures are added to each other in a container is closed . The temperature is taken a
    11·1 answer
  • during the process of cellular respiration, energy is released from(1)Carbon dioxide (2) Oxygen atoms(3)Water molecules (4) chem
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!