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3 years ago

What biological molecules provide energy and structural support to living organisms?

Chemistry

1 answer:

Romashka [77]3 years ago

3 0

Answer:

Option D: Carbohydrates

Explanation:

Carbohydrates are a group of macromolecules that are a vital energy source for the cell, provide structural support to many organisms, and can be found on the surface of the cell as receptors or for cell recognition.

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Astatine, At, is below iodine in Group 17 of the Periodic Table. Which statement is most likely to be correct?

Sphinxa [80]

The answer is A hope this helps

8 0

3 years ago

If a calcium supplement claims to have 200 mg of calcium per pill - how much mass if each pill if the supplement is a calcium su

arlik [135]

Answer: mmmmmmmmmmmmmmmmmmmmmmmmmmmm

Explanation:

mmmmmmmmmmmmmm

7 0

3 years ago

Arrange the elements in decreasing order of first ionization energy.

just olya [345]

Answer:

The decreasing order of first ionization energy: Se > Ge > In > Cs

The decreasing order of first ionization energy: x > y > z

Explanation:

Ionization energy refers to the energy needed to completely pull out an electron from the valence shell of a neutral gaseous atom.

First ionization energy is the energy involved in the removal of first valence electron.

In the periodic table, down the group, as atomic radius of elements increases, the ionization energy decreases

Whereas, across a period, as atomic radius of elements decreases, the ionization energy increases.

PART (A):

Position of the given elements in the periodic table:

Indium (In): Group 13, period 5

Germanium (Ge): Group 14, period 4

Selenium (Se): Group 16, period 4

Caesium (Cs): Group 1, period 6

Thus, the increasing order of atomic radius: Se < Ge < In < Cs

Therefore, the decreasing order of first ionization energy: Se > Ge > In > Cs

PART (B):

Given elements:

element x: radius = 110 pm

element y: radius = 199 pm

element z: radius = 257 pm

Thus, the increasing order of atomic radius: x < y < z

Therefore, the decreasing order of first ionization energy: x > y > z

5 0

3 years ago

Matter that is the same throughout is called what

Stolb23 [73]

The matter that has the same composition and properties throughout is called pure chemical substance. So the answer is substance.

6 0

3 years ago

What is hydrogen peroxide ?

Sati [7]

chemical that appears as a colorless liquid, is used in a wide range of cleaning and personal care products, including hair dyes and bleaches, toothpaste and mouthwashes, bathroom cleaners and laundry stain removers. Hydrogen peroxide can also be found in over-the-counter first aid antiseptics, and it is used as a bleaching agent in some food products. It has other consumer and industrial uses as well, including water treatment.

6 0

3 years ago