Help please this is due tomorrow and I have a lot to do

Answer:

Plasma, in physics, an electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles, produced when the atoms in a gas become ionized. It is sometimes referred to as the fourth state of matter, distinct from the solid, liquid, and gaseous states.

Answer:

hope this helps

Explanation:

Natural nitrogen (7N) consists of two stable isotopes: the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14, with the remainder being nitrogen-15. Fourteen radioisotopes are also known, with atomic masses ranging from 10 to 25, along with one nuclear isomer, 11mN.

H3N

Nitrogen-15 | H3N

Answer:

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

Answer:

developing the atomic theory of matter

Explanation:

Answer:

[tex]12x {}^{2} y - 32xy + 8y[/tex]

first factorise out 4y :

[tex] = 4y( {3x}^{2} - 8x + 2)[/tex]

Answer:

well its def is : an explanation of observations or events based on knowledge gained from many observations and investigations

Explanation:

Answer:  Charles' Law

Explanation:  At constant pressure, Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale.  [0 Kelvin = 0 Liters gas]

Explanation:

. Charles’s law—named for J.-A.-C. Charles (1746–1823)—states that, at constant pressure, the volume V of a gas is directly proportional to its absolute (Kelvin) temperature T, or V/T = k. 

Answer:

B.Revisionary

Explanation:

Revisionary movement usually use legal channels to seek change

A movement that  tries to improve a part of society, usually through legal methods is a  revisionary movement.

A revisionary movement always target the revision or improvement of the whole or part of the society. Many revisionary movements across the world are calling for different types of social changes such as gender equality and equal access to education.

Hence, a movement that  tries to improve a part of society, usually through legal methods is a revisionary movement.

Learn more: https://brainly.com/question/1411414

Answer:

22:

Formular:

[tex]atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\ [/tex]

substitute:

[tex]atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}[/tex]

23:

Same element is represented by same number of protons.

Answer:

6 protons. 6 protons

7 neutrons. 8 neutrons

6 electrons. 6 electrons

Note: Atoms with same proton number but different mass number are called isotopes

Answer:

A

Explanation:

Answer:

A is the correct answer I believe

Answer:

Softening - In water softening, hydrated lime is used to remove carbonate "hardness" from the water. Hardness caused by other calcium and magnesium salts, called noncarbonate hardness, is generally treated by means of the lime-soda process, which entails the precipitation of magnesium by lime.

Answer:

A and D

Explanation:

Observation

Experimentation

Models

Analysis of existing data

The amount of physical material in an object

Answer:

Explanation:

im not sure

Answer:

5.2427*10^4

If rounding then 5.2*10^4

Explanation:

Answer:

Coloroplasts I hope it's right ❤️

Answer:

2.5

Explanation:

13.4 by 5.36

Mass by volume

Answer:

11.1 grams per cubic cm

Explanation:

Volume = 13.4 in^3 = 219.587 cm^3

Mass = 5.36 lb = 2431.255 gram

[tex]density = \frac{mass}{volume} \\ = \frac{2431.255}{219.587} \\ = 11.0719441 \\ \approx \: 11.1 \: grams \: per \: {cm}^{3} [/tex]

Answer:

false because trachea connects to the lungs and oesophagus connects from the mouth to the stomach

Answer:

false

Explanation:

It starts with the mouth. The esophagus is a long tube that connects the mouth to the stomach, which is within the ribcage. The stomach is a muscular bag-like structure and forms a J-shaped pouch and is located under the ribcage. The stomach connects to the small intestine.

Answer:

this is from another brainliest answers.

Explanation:

Ionic compounds need to be molten or in solution for electrolysis to work. This is because the charged particles that make them up (ions) need to be free to move to the electrodes.

Answer:

Weigh a beaker or glass with the liquid then subtract the result from the beaker

Explanation:

beaker weight + liquid weight = mass of container

mass of container - beaker weight= liquid weight

This is similar to the law of conservation of mass

hope that helps :)

Answer:

Advantages of chemistry:-

•Basic knowledge of chemistry helps you to read and understand product labels.

•Chemistry can help you make informed decisions.

•Chemistry is at the heart of cooking. ...

•A command of chemistry can help keep you safe!

Disadvantages of chemistry:-

•It isn't a sustainable form of energy. ...

•It can be expensive.

•It can produce harmful waste.

•It can be used to create devastating weapons.

Answer:

Lithium, Hydrogen, Sodium, or Oxygen, Sulfur, Selenium They are all in the same column. Find three elements in the same family and list them. 4. Oxygen, Carbon, Nitrogen, Aluminum, Silicon, Phosphorous They are all in the same row

Explanation:

Answer:

D. to communicate their grievances to the British king about how he treated them

I just took the test and said this was the correct answer.

The central goal of the author(s) of the Declaration of Independence is to communicate their grievances to the British king about how he treated them. The correct option is D.

The declaration of independence tells three main ideas. These ideas are all men are equal, and everyone should get equal rights, liberties, and the pursuit of happiness. The main aim of the government should be to protect the rights of the people.

The main goal of the declaration of independence is to tell that energy human is equal, and that should not be discriminated don the basis of caste or gender. They should gate the liberty of doing and going anything and anywhere, respectively.

Thus, the D. communicated their grievances to the British king about how he treated them.

To learn more about the Declaration of Independence, refer to the link:

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Answer:

60.06 g/mol

The solute is urea, CO(NH2)2. Molar mass of urea: (12.01) + 16.00 + 2(14.01 + 2(1.008)) = 60.06 g/mol.

Explanation:

Answer:

60.06 g/mol

Explanation:

the solution area,CO(NH2)2.molar mass urea:

(12.01)+16.00+2(14.01+2(1.008))=60.06g/mol

Answer:

Physical properties are used to observe and describe matter. Physical properties can be observed or measured without changing the composition of matter. These are properties such as mass, weight, volume, and density.