How many total atoms of Sodium are represented below

Answer:

One sentence that can be written for evidence is:

Fossils. Fossils document the existence of now-extinct past species that are related to present-day species.

Answer:

Element- Aluminum

Element - Mercury

Compound - Ferrous Sulfate

Compound - Sucrose

Element - Carbon​

Explanation:

Element: an element is a pure substance which is composed of only one type of atoms and that cannot be split or broken down into any simpler pure substance.

Examples of elements include:

Aluminum - it is composed of only atoms of aluminium. Each atom has 13 protons

Mercury - it is composed of only atoms of mercury. Each atom has 80 protons

Carbon - it is composed of only atoms of carbon. Each atom has 6 protons

Compound: a compound is a pure substance that is composed of two or more types of atoms (elements) in a fixed and definite proportion and that cannot be split into component elements by simple physical methods but only by chemical methods. Examples of compound include:

Ferrous sulphate: It is composed of atoms of Iron, Sulfur and Oxygen

Sucrose: It is composed of atoms of Carbon, Hydrogen and Oxygen.

Answer:

The correct answer should be (A) 100%.

Explanation:

Since both the bull & the cow are hom0zygous (meaning they each have two identical alleles in their genes) and the black bull possesses the dominant gene, we can assume that our Punnett square should look like the model I attached below. Since "Bb" would contribute to the percentage of black-colored offspring, and all of the squares end up with "Bb", that means that 4 out every 4 offspring will be dark in color. Or, put more simply, the percentage of the offspring that will be black in color is 100%.

Answer:

study of the relations between heat, work, temperature, and energy

Explanation:

Thermodynamics is the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics describe how the energy in a system changes and whether the system can perform useful work on its surroundings.

Answer:

[D]can be reversed with no net change in either system or surroundings

A reversible process is one that can be reversed with no net change in either system or surroundings. Therefore, option (D) is correct.

A thermodynamic process can be reversible if the process can be turned back to both the system and the surroundings to return to their original states, with no other change in the universe.

No such processes as reversible processes can exist and these processes can easily be defined as idealizations or models of real processes.

A few examples of Reversible Processes: are the extension of springs, slow adiabatic compression or expansion of gases, electrolysis, the frictionless motion of solid, slow isothermal compression or expansion of gases

An irreversible process is a process in which the system and the surroundings do not return to their actual condition once the process is initiated. Examples of irreversible processes are Heat transfer, Diffusion, and electricity flow through a resistance.

Learn more about the reversible process, here:

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#SPJ2

Answer:

Hello I didi this quiz and i got 100% and the answer is (a) hope this helps <3

Explanation:

Answer:

[tex]\boxed {\tt 5.26315789 \ m/s}[/tex]

Explanation:

One way to find velocity is by dividing the distance by the time.

[tex]v=\frac{d}{t}[/tex]

The distance traveled by the man is 100 meters.

The time is 19 seconds.

[tex]d=100 \ m \\t= 19 \ s[/tex]

[tex]v=\frac{100 \ m}{19 \ s}[/tex]

Divide.

[tex]v=5.26315789 \ m/s[/tex]

The man's velocity is 5.26315789 meters per second.

Answer:

bc the water molecules freeze

Answer:

The number is known as 3 carbon molecules followed by 2 oxygen molecules. This is because on the periodic table, the letter C means carbon, and O2 means oxygen.

Answer:

I guess the answer is D point

Answer:

B. Energy stored in molecular bonds

Explanation:

[tex]19.87mol \times \frac{22.4lit}{1mol} = 445.088 lit[/tex]

Answer: Pulley or a crane.

Explanation:

Answer:

An inclined plane would have to be too long, and a lever would be impractical. Pulleys are best used to raise objects.

Explanation:

Answer:

The gravitational pull of the moon is probably changing how our atmosphere is.

Explanation:

The mass of nitrogen, N₂ required to react with 5.04 grams of oxygen O₂ is 1.76 grams

2N₂ + 5O₂ —> 2N₂O₅

Molar mass of N₂ = 2 × 14 = 28 g/mol

Mass of N₂ from the balanced equation = 2 × 28 = 56 g

Molar mass of O₂ = 2 × 16 = 32 g/mol

Mass of O₂ from the balanced equation = 5 × 32 = 160 g

SUMMARY

From the balanced equation above,

160 g of O₂ reacted with 56 g of N₂

From the balanced equation above,

160 g of O₂ reacted with 56 g of N₂

Therefore,

5.04 g of O₂ will react with = (5.04 × 56) / 160 = 1.76 g of N₂

Thus, 1.76 g of N₂ is needed for the reaction

Learn more about stoichiometry:

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Answer:

C8H18

Explanation:

Answer:

Both A and R are true and R is the correct explanation of A

Explanation:

The number of atomic orbitals is the same for all elements in a period. Every element in the top row (the first period), for example, has only one orbital for its electrons. The electrons of all the elements in the second row (second period) have two orbitals. Every row adds an orbital as you progress down the table.

I hope this helps <3

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Answer:

2C3H8S +13O2 =6CO2 +8H20 +2SO3

Answer:

get from (4,1) to (2,9) go up 8 and over 2 left (-2) - (4 - 2, 1 + 8), do this again (2 - 2, 9+8) and end up at (0,17) which is the y how do you change 7x+3y=3 into slope intercept form.

get from (4,1) to (2,9) go up 8 and over 2 left (-2) - (4 - 2, 1 + 8), do this again (2 - 2, 9+8) and end up at (0,17) which is the y how do you change 7x+3y=3 into slope intercept form.

get from (4,1) to (2,9) go up 8 and over 2 left (-2) - (4 - 2, 1 + 8), do this again (2 - 2, 9+8) and end up at (0,17) which is the y how do you change 7x+3y=3 into slope intercept form.

get from (4,1) to (2,9) go up 8 and over 2 left (-2) - (4 - 2, 1 + 8), do this again (2 - 2, 9+8) and end up at (0,17) which is the y how do you change 7x+3y=3 into slope intercept form.

Answer:

No, it's a physical reaction.

Explanation:

A chemical change produces new chemical compounds, but combining water and powder is just mixing the powder with the water. It's not a new compound.

I don't know how to really explain, sorry :)

Answer:

When coal is used to produce electricity , the heat energy is transformed into mechanical energy .

Explanation:

   Coal is one of the United States' most affordable and largest domestically produced energy sources. It is used to generate a significant quantity of our electricity, about 37%. Historically, producing power from coal has been correlated with a wide range of environmental impacts.

Water is converted into steam at a coal-fired steam plant, much like a nuclear plant, which in turn powers turbine generators to generate electricity. Here is how it operates in the process.

Without any pollution, the cooling water is returned to its source and the steam water is returned to the boiler to repeat the cycle.

Hence, the heat energy is transformed to the mechanical energy ,when coal is used to produce electricity.

Answer:

hi

Explanation:

hi

Answer:

As a result, to prepare 250 ml of 0.20M NaCl, take 50 ml of 1.0M NaCl solution and add 200 ml of water.

Explanation:

The ion's change in kinetic energy will be [tex]4.0 \times 10^3\;eV[/tex]

Given the following data:

Charge = 2 Coulombs.

Potential difference = [tex]2.0 \times 10^3 \;Volts[/tex]

Mathematically, kinetic energy of a charge is given by this formula:

[tex]K.E = qV[/tex]

Where:

Substituting the given parameters into the formula, we have;

[tex]K.E = 2 \times 2.0 \times 10^3 \\\\K.E = 4.0 \times 10^3\;eV[/tex]

Read more on kinetic energy here: https://brainly.com/question/1242059

Answer:

As the sun's angle changes, (because of the rotation of the earth) the sun slowly begins to shine more or less sunshine slowly. When sunsets and sunrises occur, the color of the sky changes because the sunshine is starting to fade out or in.

I put it in my own words so you don't have to worry about plagiarism :)

Answer:

Answer: The radii of main-sequence stars increases as mass increases. Main Sequence stars? Answer: Giants have larger radii compared to main-sequence stars of the same luminosity.

Explanation:

Answer:

Explanation:

Answer to Armando is an artist who sells prints of his original paintings. ... This problem has been solved! ... Armando wants to create a function P(x). to model his total profit where x is the number of paintings sold

pasagot nga po please need lang po talaga.

Answer:

Loss of oxygen

Explanation:

Shortcut defination of oxidation and reduction