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Ludmilka [50]
2 years ago
6

1.) why is the ozone layer important? What is it? And how is ozone created?

Biology
1 answer:
Anarel [89]2 years ago
4 0
Ozone protects the Earth from harmful UV rays from the Sun.
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What is the average atomic mass of a sample that has two isotopes, one with a mass of 21 amu at 62% abundance and another with a
motikmotik

Answer:

Average atomic mass = 21.38 amu.

Explanation:

Given data:

Mass of first isotope = 21 amu

Abundance of first isotope = 62%

Mass of second isotope = 22 amu

Abundance of second isotope = 38%

Average atomic mass = ?

Solution:

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass  = (62×21)+(38×22) /100

Average atomic mass =  1302 +836 / 100

Average atomic mass = 2138 / 100

Average atomic mass = 21.38 amu.

3 0
3 years ago
In which type of blood vessel is oxygen released into body cells
MArishka [77]

Answer:

<em>The pulmonary artery channels oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream. The pulmonary veins bring oxygen-rich blood to the left atrium. The aorta channels oxygen-rich blood to the body from the left ventricle.</em>

Hope this helps!!

7 0
3 years ago
What nursing theory is most used in the emergency room?
givi [52]
One theory that is most used in the Emergency room is Faye's Abdellah's theory. It defines nursing as a service to an individual as well as to the families and society. It identifies 21 nursing problems that would guide the nurse as to the prioritization of the client's needs.
5 0
3 years ago
The rate and direction of reactions are greatly influenced by
zlopas [31]

Answer:

reactions

Explanation:

Reactions occur when two reactant molecules effectively collide, each having minimum energy and correct orientation. Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.

3 0
3 years ago
Which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid?
gizmo_the_mogwai [7]

Answer:

B. The animals at each level use energy, so only a small amount of their energy is available to the next level.

Explanation:

5 0
3 years ago
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