3. How many moles of hydrogen atoms are present in 2.0 moles of ammonia
NH3?
A.3.0 mol
B. 6.0 mol
C. 8.0 mol
D. 2.0 mol

Answer:

the remains of an animal or plant preserved within a layer of rock otherwise A.

A fossil is the remains of an animal or plant preserved within a layer of rock. The correct option is A.

Fossils are the preserved form of animals or plants that are preserved on rocks or deep in the earth's crust and did not get damaged. They are discovered in the digs that are done by paleontologists.

The bones and sometimes dry skins and hairs, and teeth are also found that are preserved. These fossils help in studying animals and plants that were present in former times.

They do not get destroyed because they are preserved in rocks and stones. We got to know about dinosaurs by their fossils. There are different types of fossils are found.

Thus, the correct option is A. The remains of an animal or plant are preserved within a layer of rock.

To learn more about fossils, refer to the link:

https://brainly.com/question/3213294

#SPJ6

Answer:

The question appears to speak to the process between Liquid and Solid phases of a substance and seeks to resolve what happened in between.

The short answer is that the solid melted.

Explanation:

Melting is the process of a solid becoming fluid. When the reverse happens, (that is a liquid being solid), is called solidification. There is a temperature at which substances take their liquid form. That temperature is called the melting point. The melting point of ice (that is the temperature at which it starts to turn back to water) for instance is 32 °F.

According to the mechanics of melting, the internal energy of the solid increases, because of exposure to heat and or pressure usually through the application of heat or pressure, which increases the substance's temperature to the melting point.

Cheers    

Answer:

Explanation:

the other guy who answered must be retded cause melting isnt even a choice.

Correct Option the substance froze.

Answer:

1.39  × 10²³ molecules  of CaCl₂

Explanation:

Given data:

Number of moles of CaCl₂ = 0.23 mol

Number of molecules = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

0.23 mol × 6.022 × 10²³ molecules  / 1mol

1.39  × 10²³ molecules  

Answer: answer A

Explanation: because it gives more detail and a summarizations

3, 1, 5, 4, 3, spontaneous

Answer:

Explanation if an object is in motion and more force is applied to it, the object will begin moving faster. If two objects have the same mass and a greater force is applied to one of the objects, the object which receives the greater force will change speeds more quickly.:

Answer:

i think that it is F

Explanation:

Answer:

Magnesium hydroxide has 3 unique elements.

Explanation:

Long story short, 2 is the balancing compound in structure to make up hydroxide, therefore 1 compound would be left to create Mg(2O)H.

(This is only an opinion of mathematical science to me, I don't have complete understanding of this subject either, good luck.)

Answer:

ATG TGG AAC TGC

Explanation:

ATG TGG AAC TGC

Answer:

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.

Explanation: if this isnt want you need tell me in the comments

Answer:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

Explanation:

Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants

Water, ALSO if you cant figure out the answer looking up on g00gl3e

3 Stages of a River

YOUTHFUL STAGE (UPPER COURSE) – V- Shaped Valley > Erosion. ...

MATURE STAGE (MIDDLE COURSE) – Meanders > Erosion and Deposition.

OLD AGE STAGE (LOWER COURSE) – Floodplains > Deposition. ...

Advantages. Scenic Attraction. ...

Dangers. Flooding – Damage to property, land, animals and homes. ...

Answer:

I do not know. I think there is .as we are the living creatures in this earth. maybe aliens are creatures of other planet or galaxies. I am not scientists to prove it.sorry.

Answer:

C Earthquake

Explanation:

I just took this test and it’s on Quizizz

The event which best describes the model is an Earthquake. Earthquake is

formed when two plate boundaries collide with each other.

The plate boundaries colliding results in them being stuck. Pressure then

builds up between them which results in the plates breaking loose as time

goes on.

The movement that results from the plates breaking loose is what results in

an earthquake being experienced.

Read more on https://brainly.com/question/20409140

Answer:

radio waves are the sound waves that are produces by a radio

Explanation:

Answer:

Increase

Explanation:

Answer:

CURVE is the answer

Answer:

the answer is three 3

......

Answer:

gas and liquid

Explanation:

Answer:

it will explode (not intensely) there is some oxygen in the bottle so the cap would pop off violently, the longer it stays in the fire the more energy is being pent up.

Explanation:

Answer:

The bottle will increase in both temperature and pressure which will cause the bottle to crack/shatter! Hope this helps :)

Explanation:

The law of Gay-Lussac states that as temperature increases so will pressure.

Answer:

3:small holes that let air in and out

Answer:

I think #5 is its structure

Explanation:

Answer: The first is Genes and the second one is the structure.

Explanation:

Answer:

A covalent bond

hope this helps!

Heat required = = 126.42 kJ

Given

1.96 mol NaHCO₃(s)

Required

Heat needed

Solution

Reaction( decomposition of Baking soda (NaHCO₃) :

2NaHCO₃ (s) + 129 kJ ⇒ Na₂CO₃ (s) + H₂O (g) + CO₂ (g)

For 2 mol NaHCO₃ , heat needed = 129 kJ

conversion factor :

[tex]\tt \dfrac{129~kJ}{2~mol}[/tex]

So for 1.96 mol :

= 1.96 mol x (129 kJ/2 mol)

= 126.42 kJ

Answer:

i think kilometer or light year

Explanation:

Answer:

red ig

Explanation:

Answer:

atomic nucleus :)

Explanation:

Answer:

Photosynthesis utilizes water as an electron donor in cyanobacteria in general and creates oxygen as a by-product, although some can even use hydrogen sulfide, a process that occurs among other photosynthetic bacteria, such as purple sulfur bacteria. Carbon dioxide is reduced via the Calvin cycle to form carbohydrates.