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
maxonik [38]
3 years ago
8

How many are the natural occurring elements?

Chemistry
1 answer:
sergejj [24]3 years ago
6 0

there are 92 naturally occuring elements

You might be interested in
Summarize our current
WARRIOR [948]

Answer:

Atoms have protons and neutrons in the center, making the nucleus, while the electrons orbit the nucleus. The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different.Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

8 0
2 years ago
What are the 4 major macromolecules
ANEK [815]
Carbohydrates
Lipids
Protein
Nucleic acids
8 0
3 years ago
Two cars that are identical except for their color are traveling on the same road.
Ray Of Light [21]
B. The blue car has more kinetic energy than the red car
7 0
3 years ago
Read 2 more answers
The pathway by which carbon is transferred from living organisms to the atmosphere is called:
Phoenix [80]

Answer:

cellular respiration

Explanation:

All exergonic processes produced in the cell, through which substances oxidize and chemical energy is released, are grouped under the name of cellular respiration, but to break down an organic molecule the cells employ, mainly dehydrogenations that can be carried carried out in the presence or absence of atmospheric O2 oxygen. There are therefore two types of breathing: aerobic respiration and anaerobic respiration. The latter also called fermentation.

Aerobic respiration  (oxidative phosphorylation)

- Use molecular O2.

- It degrades glucose to CO2 and H2O

- Exergonic

- Recovers about 50% of chemical energy

- Present in most organisms.

- It uses enzymes located in the mitochondria.

3 0
3 years ago
The acid dissociation constant Ka of boric acid (H3BO3) is 5.8 times 10^-10. Calculate the pH of a 4.4 M solution of boric acid.
madam [21]

Answer: The pH of a 4.4 M solution of boric acid is 4.3

Explanation:

H_3BO_3\rightarrow H^+H_2BO_3^-

at t=0  cM              0             0

at eqm c-c\alpha        c\alpha          c\alpha  

So dissociation constant will be:

K_a=\frac{(c\alpha)^{2}}{c-c\alpha}

Give c= 4.4 M and \alpha = ?

K_a=5.8\times 10^{-10}

Putting in the values we get:

5.8\times 10^{-10}=\frac{(4.4\times \alpha)^2}{(4.4-4.4\times \alpha)}

(\alpha)=0.000011

[H^+]=c\times \alpha

[H^+]=4.4\times 0.000011=4.8\times 10^{-5}M

Also pH=-log[H^+]

pH=-log[4.8\times 10^{-5}]=4.3

Thus pH of a 4.4 M H_3BO_3 solution is 4.3

3 0
3 years ago
Other questions:
  • Use the periodic table to give the name and symbol for each of the following elements:
    12·1 answer
  • How did Thompson know that the atom was made of more than just electron?
    15·1 answer
  • Explain organic chemistry
    14·2 answers
  • The bouncing of light when is changes media is called what
    15·2 answers
  • when a person strikes a match, potential energy in the match is transformed into which types of energy?
    15·2 answers
  • A similarity between the forces involved in both ionic and covalent bondingis that bothO A) involve the sharing of electrons.O B
    5·1 answer
  • Please help ASAPPPPPPPPPPPPPPP
    8·1 answer
  • The work done on a machine, the product of the input force and the distance through which the force is exerted.
    11·1 answer
  • What has caused air quality in United States to improve/get better since the 1950s?
    9·2 answers
  • When a reaction mixture reaches chemical equilibrium, ____.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!