Someone pls help me I will make you brain

Explanation:

% phosphorus by mass

            = (mass of phosphorus ÷ mass of phosphoric acid) × 100%

            = (30.974 g/mol ÷ 97.994 g/mol) × 100%

Answer:

When a liquid changes to gas, the particles absorb heat energy and they start vibrating faster and distance between them increases. On constant vibration, intermolecular forces decrease and particles start moving away from each other and change to gas.

Answer:

Elements in the same period have the same (number of electron shells)

The relationship between an hydrogen atom's energy levels, sublevels and atomic orbitals lies in the fact that hydrogen atom has a shell with energy level of 1 and the energy sublevels are similar as there's only one and have the same energy, and lastly, only one atomic orbital exists in a hydrogen atom

Ultimately, the hydrogen atom has only one electron In the energy level 1, sublevels with equal energy as there are no sublevels in the energy level 1 and only the 1s atomic orbital.

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The type of fron created is a "warm" front.

Answer:

i think it would be answer D

Explanation:

Answer:

The series of chemical reactions that are used to change natural resources into synthetic products is called chemical synthesis. To make a "natural" product, the natural resource is not chemically changed as much. ... For example, the synthetic material plastic is made from petroleum, which is pumped out of the earth.

Explanation:

give brainliest!!!!

The use of synthetic products impact the natural resources from which they are derived by depleting the natural resource and causing harm to it.

Resources which are obtained  from nature by a few modifications in them are called natural resources.These are resources which are available in nature . Every synthetic product is composed of natural resources.

It may exist in a form of separate entity or in form of living-beings or the can even be transformed into products which are of economic importance.Because of the transformation of natural resources into products of economic importance they are getting depleted at a rate  which much times greater than the rate it was getting depleted several years ago.

As the products available today comprise  of synthetic products natural resources are getting depleted which is becoming a global concern.

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Answer:

about 5 years i think

Explanation:

I've tried all the methods i know

it's about 5 years

hope it helps

The age of the artifact is equal to 2.5 × 10³ years when the half-life of carbon- 14 is 5.73 × 10³ years.

The half-life of a radioactive element is defined as the time that is required to decrease the original quantity of a radioactive isotope to half after decay.

The half-life of a radioactive isotope is the feature of the element and does not depend upon the actual amount of the radioactive isotope.

Given, the ratio of the initial and left amount of  ¹⁴C is :

N = 0.745 N₀

The half-life period of the ¹⁴C isotope = 5.73 × 10³ years

The rate constant of the decay of radioisotope can be calculated from the below-mentioned formula:

[tex]\displaystyle k=\frac{0.693}{t_{1/2}}[/tex]

[tex]\displaystyle k=\frac{0.693}{5.73 \times 10^3}[/tex]

k = 0.123 × 10⁻³ yr⁻¹

The age of the artifact can be calculated as:
[tex]\displaystyle t =\frac{2.303}{k} log\frac{N_0}{N}[/tex]

[tex]\displaystyle t =\frac{2.303}{0.123\times 10^{-3}} log\frac{N_0}{0.735 N_0}[/tex]

t = 2.5 × 10³ years

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Answer:

Determine the mass of substance and it's molar mass. Divide the given mass by it's molar mass to get moles and multiply time

6.002*1023 molecules 1mole

Answer:

In Test 1 the person substantially did better and either had better knowledge of the subject or studied for it more then they did for Test 2.

Explanation:

El agua se purifica a partir de un proceso de filtrado. Las características que evidencian el filtrado incluyen pH normal, color cristalino, ausencia de metales pesados y/o microorganismos, etc.

Las características que permiten determinar si el agua ha sido correctamente filtrada incluyen:

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Answer:

silver

Explanation:

is a chemical element with the symbol Ag (from the Latin argentum, derived from the Proto-Indo-European h₂erǵ: "shiny" or "white") and atomic number 47.

Plasma is one of the four common states of matter. A plasma is an electrically charged gas. In a plasma, some electrons have been stripped away from their atoms.

Explanation:

Plasma is one of the states of matter that are electrons stripped from the nucleus

Answer:

Neptune has a dynamic atmosphere with a shroud of cold clouds. The average cloud temperature ranges from about -240 degrees to -330 degrees F.

Answer:

2 atoms

Explanation:

Explanation:

135F is the temperature

The maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.

Time/temperature control safety is a measurement of the temperature hold capacity of certain food, such as meat, fish, dairy, cream and custard products.

Thus, the maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.

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Answer:

yes because its nuetrins notation

Answer:

B  3.70 mol NH2

Explanation:

Answer:

A. 0.0717 L
B. 82.9 L
C. 21.5 L

Answer:

8

Explanation:

Hope this helps you :)

Answer:

Alcohol in Your Body

Alcohol reaches your brain in only five minutes, and starts to affect you within 10 minutes. After 20 minutes, your liver starts processing alcohol. On average, the liver can metabolize 1 ounce of alcohol every hour.

Explanation:

hope that helps you i just love sharing glmv sorry

Answer:    q = 64 kJ

Explanation:

As you know, a substance's specific heat tells you how much heat is required to increase the temperature of  

1 g

of that sample by  

1

∘

C

.

In water's case, you know that its specific heat is equal to  

4.18

J

g

∘

C

. This tells you that in order to increase the temperature of  

1 g

of water by  

1

∘

C

, you need to supply  

4.18 J

of heat.

How much heat would you need to increase the temperature of  

200 g

of water by  

1

∘

C

?

Well, if you need  

4.18 J

per gram to increase its temperature by  

1

∘

C

, it follows that you will need  

200

times more heat to get this done.

Likewise, if you were to increase the temperature of  

1 g

of water by  

76

∘

C

, you'd need  

76

times more heat than when increasing the temperature of  

1 g

by  

1

∘

C

.

Combine these two requirements and you get the total amount of heat required to increase the temperature of  

200 g

of water by  

76

∘

C

.

Mathematically, this is expressed using the following equation

q

=

m

⋅

c

⋅

Δ

T

, where

q

- heat absorbed/lost

m

- the mass of the sample

c

- the specific heat of the substance

Δ

T

- the change in temperature, defined as final temperature minus initial temperature

Plug in your values to get

q

=

200

g

⋅

4.18

J

g

∘

C

⋅

(

100

−

24

)

∘

C

q

=

63536 J

I'll leave the answer rounded to two sig figs and expressed in kilojoules

q

=

64 kJ

We have that the arrangement of particles of NaCl is most ordered in a sample of

NaCl(s)  

i.e solid NaCl

From the question we are told

The arrangement of particles is most ordered in a sample of  

1. NaCl(aq)

2. NaCl(l)  

3. NaCl(g)  

4. NaCl(s)

NaCl Generally known as sodium chloride or salt exist in four main states as shown

1. NaCl(aq)

2. NaCl(l)  

3. NaCl(g)  

4. NaCl(s)

Mow in a subject of its arrangement of particles we can see that as its state changes from gaseous through to solid it gains in form and arrangement of particles

Therefore

The arrangement of particles of NaCl is most ordered in a sample of

NaCl(s)  

i.e solid NaCl

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Answer:

Explanation:

Most periodic tables have a staircase thick line on their right side. This line separates the metals from the non metals.

O (oxygen) and N (nitrogen) are on the right side of the staircase.

Fe is on the left.

Those elements on the right side of the staircase are non metals.

Those elements on the left of the staircase are metals, so Fe is a metal.