Evidence seems to show that life originated from chemicals? True or False
Answers
Answer:
True.
Explanation:
True. Based on scientific evidence and theories such as the Miller-Urey experiment, which successfully demonstrated the formation of organic compounds under conditions simulating early Earth, it is widely accepted that life originated from chemicals. The process of chemical evolution, combined with favorable environmental conditions, eventually led to the development of self-replicating molecules and the emergence of primitive life forms.
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Which of the following diagrams is the correct electron dot diagram for Ne?
For water to become a mechanical weathering agent through ice wedging, it needs to go through a cycle of freezing and thawing.True False
29 Which term identifies a type of nuclear reaction?(1) fermentation (3) reduction(2) deposition (4) fission
Answers
(b) Bilirubin
The pigment molecule that increases in the blood and induces the yellowish color of the skin described as Jaundice is (b) Bilirubin. Jaundice occurs when there is an accumulation of bilirubin in the bloodstream, which can be due to various medical conditions affecting the liver or the breakdown of red blood cells. This excess bilirubin can lead to the yellowing of the skin and the whites of the eyes.
B. 3.636 kPa
C. 854.46 kPa
D. 510 kPa
Answers
Answer : (C) 854.46 KPa.
Solution : Given,
Initial pressure = 400 KPa
Initial temperature = 110 K
Final temperature = 235 K
According to the Gay-Lussac's law, the absolute pressure is directly proportional to the absolute temperature at constant volume of an ideal gas.
P ∝ T
Formula used :
where,
= initial pressure
= final pressure
= initial temperature
= final temperature
Now put all the values in above formula, we get
By rearranging the terms, we get the value of new/final pressure.
= 854.5454 KPa
854.55 KPa
C. 854.46 kPa
b. Carbon, atomic number 6
c. Neon, atomic number 10
d. Fluorine, atomic number 9
Answers
Answer:
Neon, atomic number 10, is stable.
Explanation:
Valencia electrons are the electrons found in the last electronic layer (called valence orbitals). These electrons are what determine the ability of the atom to form bonds. When an element joins another, it does so through its valence electrons.
The noble gases include the elements of group 18 of the periodic table. The noble gases are characterized by their very low chemical reactivity because they are very stable. This is because they have the full valence layer (complying with the octet rule, that is, they have 8 electrons at their last energy level, with the exception of helium that has 2 electrons), causing them to have a low tendency to capture or release electrons . That is why they are also called inert gases.
The Neon, whose atomic number is 10, belongs to the group of noble gases. So this element is stable.
Neon is the most stable because it has 8 valence electrons. when an element has full number of valence electrons, they become stable.
Answers
Answer:
Explanation:
Na reacts with all OH groups to produce hydrogen.
The reaction with cyclobutanol is shown below.
The reaction with butanoic acid is
Both compounds release bubbles of hydrogen, so you can't use sodium to distinguish between them.
from the cell to the air.
from the water to the cell.
from the nucleus to the mitochondria.
Answers
Photosynthesis is the process in plants to make their food. This involves the use carbon dioxide to react with water and make sugar or glucose as the main product and oxygen as a by-product. I think the best answer would be the first statement.
Answer: Option A
Explanation:
Photosynthesis is a process that helps the plants to make food by the help of carbon dioxide from the atmosphere and water, nutrients from soil and converts it into glucose in the presence of sunlight.
Atmosphere is a non living component of environment where carbon dioxide is present and it is transferred to plants which is a living component of ecosystem.