The Periodic table below shows major regions in different colors. In this periodic table, which type of element is shown in green boxes?

Answer: its a and b

Explanation:its very simple and the reason is bc yea

Answer:

B

Explanation:

The answer is B because it said subduction i guess. And I got it right! Hope this helps to anyone that is looking at this!

Answer:

physical science

According to 2 sources

Chemistry is a physical science Chemistry is typically considered a physical science, as defined by the Encyclopedia Britannica, because the study of chemistry does not involve living things. Most of the chemistry involved in research and development, such as making new products and materials for customers, falls within this purview.

Explanation:

PA BRAINLIEST

HOPE IT HELPS

Answer:

2.08 atm

Explanation:

Here we use Dalton's Law of Partial Pressures: Pa+Pb=Ptotal. 0.70 atm + Pb = 2.78 atm. To find the missing pressure of gas b we subtract .7 from the 2.78

Answer:

205 calories.

Explanation:

According to the USDA, "Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram." 9 grams of fat at 9 calories per equals 81 calories + 6 grams of protein at 4 calories per gram which equals 24 calories + 25 grams of carbohydrate at 4 calories per gram which is equal to 100 calories.

Total that all up and you get 81 cal + 24 cal + 100 cal=205 calories.

I don't know what kind of course this is for, but if they are incredibly picky, what we refer to as "calories" are actually kilocalories, which are equal to one thousand "real" calories each. However, I'm very confident that the correct answer is 205 calories.

The sandwich will provide 205 calories.

A calorie is an energy unit. It's the quantity of heat needed to increase the temperature of one gramme of water by [tex]1^{0} C[/tex] at one atmosphere of pressure.

Its is given that, Fat = 9 g, protein = 6 g, carbohydrate = 25 g.

It is known that, fat contains 9 calories / gram , carbohydrate contains 4 calories / gram and protein contains 4 calories / gram.

Now, adding all terms.

Total calories = (9×9) +(6×4) +(25×4)

= 205 calories.

Therefore, the sandwich will provide a total of 205 calories.

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Answer:

6,25 gm

Explanation:

4. The half-life of C-14 is 30 years. If a scientist had 100.0 g at the beginning, how

many grams would be left after 120 years has elapsed?

10 years would be 120/30 = 4 half lives0

s0 the fraction of c-14 left would be four (1/2) multiplied together

1/2 X 1/2 X 1/2 X 1/2 = 1/16

SO 1/16 OF THE 100.0 gm would be left

100.0/16  = 6,25 gm

Answer:

A

Explanation:

According to the chart, A tv turns into heat, light, and sound energy.

The volume of the gas is 27 ml

The calculation can be done as follows

The first step is to convert the pressure to atm

convert 2280 tors to atm

760 tors= 1 atm

= 2280/780

= 3 atm

The formula is

PV= nRT

The next step is to write out the parameters

Pressure= 3 atm

Temperature= 21 °C

no of moles= 32.1 mole

volume= ?

(r)constant= 8.314

3 × v= 32.1×8.314×21

3v= 81.080

V= 81.080/3

V= 27 ml

Hence the volume of the gas is 27 ml

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Answer:

Epoxy is the family of basic components or cured end products of epoxy resins.

Explanation:

E = hf

c= f × lamda

f= c/ lamda

c= speed of light

f= frequency

lamda = wavelength

E = h c/ lamda

E = 6.626 × 10^-34 Js × 3 × 10^8 ms-1 / 589 × 10^-9 m

= 3.37 × 10^15 J

Answer:

C. Chemical Bonds are broken

Explanation:

A chemical reaction occurs when chemical bonds are broken.

Chemical reactions occur when chemical bonds between atoms are formed or broken.

Hope this helps :)

Answer:

c: chemical bonds are broken

Explanation:

the broken bonds then create new bonds, rearranging the atoms into a new substance :)

Answer:

b) Industrial farming

Explanation:

The term “industrial agriculture” refers to the type of farming which raises and cultivates large numbers of livestock and plants in high-density environments. It uses modern technology to promote faster growth and reduce illness and death rates in livestock, creating food products on a mass scale.

Answer: B.

Explanation

industrial agriculture

brainliest me

Answer:

Our current model of the atom can be broken down into three constituents parts – protons, neutron, and electrons. Each of these parts has an associated charge, with protons carrying a positive charge, electrons having a negative charge, and neutrons possessing no net charge.

Answer:

Brainlest

Explanation:

A polymer is a molecule made up of repeating units. These units, called “monomers”, form a long molecular chain. It might have branches, or it might just be one straight line of molecules, each connected in the same way. A monomer of polyethylene

Answer:

Correct option is

C

Ag

2

CO

3

; K

sp

=6.2×10

−12

(A) For CaCO

3

,S=

Ksp

=

8.7×10

−9

=9.3×10

−5

M

(B) For CuS,S=

Ksp

=

8.5×10

−45

=9.2×10

−23

M

(C) For Ag

2

CO

3

,S=(Ksp/4)

1/3

=(6.2×10

−12

/4)

1/3

=1.15×10

−4

M

(D) For Pb(IO

3

)

2

,S=(Ksp/4)

1/3

=(2.6×10

−13

/4)

1/3

=4×10

−5

M

Hence, Ag

2

CO

3

has the greatest molar solubility in pure water.

Answer:

-55°C

Explanation:

Bwcause 38°C is gonna make it colder so thats why you should use that.

The addition of more acid or base will increase the number of H3O+ and A- particles thereby decreasing and increasing the pH of the solution respectively.

An acid-base titration is one in which an acid is added to a given volume of base in order to neutralize it.

When more of acid is added to a solution of a base than is required to neutralize it, the solution becomes acidic.

Similarly, when more base is use to neutralize an acid than is required, the solution becomes alkaline.

In the given simulation, (H3O+) is the acid while (A-) is the base.

By adding increasing the quantity of acid added, the number of H3O+ particles will increase. This will reduce the pH of the solution.

Also, the adding more base to the solution, the number of A- particles in the solution will increase. This will increase the pH of the solution.

Therefore, addition of more acid or base will increase the number of H3O+ and A- particles thereby decreasing and increasing the pH of the solution respectively.

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Answer: 0.79 atm

Explanation:

The Ideal Gas Law is PV=nRT.

since both Ar and O2 have the same volume and temperature, the only variable causing the differnce in pressure betwwen the 2 gases is the number of moles

the total pressure = the partial pressure of Ar + the partial  pressure of O2

1.024 atm = 0.447 amt + ?

so  

the total pressure of the bottle is 1.024 atm, what is the partial

pressure of O2 in the bottle? is PV

Answer:

447.64 grams

Explanation:

To find the mass when given moles, it is a pretty simple process.

I start by finding the molar mass of chloric acid, which comes out to 84.46 grams/mol. To find the MM (molar mass), you just take the mass of each element in the molecule from the periodic table and add them all together.

After this, you set up the equation by taking the moles given and multiplying it by the molar mass. This gives you the new value in grams (since we cancelled out the moles). I have attached my work below.

I hope this helps! :^)

The mass of 5.3 moles chloric acid has been 447.85 g.

The mass of 1 mole of a compound has been equivalent to the molar mass of the compound. The molar mass of a compound has been the sum of the constituent atoms in a formula unit.

The molar mass (mwt) of chloric acid has been given as:

[tex]mwt=m_H\;+\;m_C_l\;+\;(m_O\;\times\;3)[/tex]

By substituting the values for the mass of constituent atoms, the molar mass has been given as:

[tex]mwt=1\;+\;35.5\;+\;16\;\times\;3\\mwt=36.5\;+\;48\\mwt=84.5[/tex]

The molar mass of chloric acid has been 84.5 g/mol.

The mass of 1 mole of chloric acid has been 84.5 g/mol. The mass of 5.3 moles chloric acid has been:

[tex]\rm 1\;mol=84.5\;g\\5.3\;mol=5.3\;\times\;84.5\;g\\5.3\;mol=447.85\;g[/tex]

The mass of 5.3 moles chloric acid has been 447.85 g.

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- Petroleum fraction consisting mostly of [tex]C_{7}[/tex] and [tex]C_{8}[/tex] hydrocarbons

- The fraction is also called heavy naphtha

- Boiling in the range 90‒140 °C

- Ligroin is used as a laboratory solvent

- Ligroin it also esed as a motor fuel or as a solvent for fats and oils in dry cleaning

         [] All of these are different characteristics of ligroin​

         [] If you need more let me know  

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

The volume of titrant required for the titration would be 27.44 mL

From the illustration, the initial titrant volume was 2.51 mL. This figure represents the initial reading on the burette.

In the same vein, the final volume of the titrant was 29.95 mL. This figure represents the final reading on the burette.

In order to get the volume of titrant used:

Volume of titrant used = final volume - initial volume

                             = 29.95 - 2.51

                                = 27.44 mL

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Answer:

i think its D

Explanation:

In order to get maximum accuracy, student should take average of results from all four trials.

Accuracy  in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:

1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.

2)Percentage of true value--It is the accuracy  which is determined by identifying accuracy of the instrument  and comparing it with the measured true value.

3)Percentage of scale range- It is the accuracy  which determines accuracy of the measurement.

Accuracy in case of instruments  is neglected up  to ±0.5 percent.Accuracy of measurements can be increased by taking multiple measurements and taking into account human errors.

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Answer: 4

Explanation:

Explanation:

Tabel di bawah ini memberikan data tentang sampel gas. Manakah dari berikut ini yang dapat ditentukan dengan menggunakan data? Volume 2,0 L Tekanan 3,6 atm Suhu 323 K komposisi kimia gas suhu kondensasi gas jumlah mol dalam sampel jarak antar molekul gas dalam sampel

Explanation:

....

해바라기해바라기해바라기해바라기

Answer:

it undergoes a chemical change

Answer: 3

Explanation:

A user dissolves exactly 1 g of ketamine in 1/4 cup of water.

Given 1 cup = 236.5 mL, the volume of 1/4 cup of water is:

1/4 cup × (236.5 mL/1 cup) = 59.13 mL

1 g of ketamine is dissolved in 59.13 mL of water. The concentration of ketamine, in mg/mL, is:

C = 1000 mg / 59.13 mL = 16.91 mg/mL

The volume of this solution that a 59.0 kg user (body mass) would have to consume to experience a high at 0.600 mg/Kg is:

[tex]59.0 kgBM \times \frac{0.600mgKetamine}{1kgBM} \times \frac{1mL Soluiton}{16.91mgKetamine} = 2.09 mL[/tex]

The volume of this solution that a 59.0 kg user (body mass) would have to consume to become unconscious at 2.00 mg/kg is:

[tex]59.0 kgBM \times \frac{2.00mgKetamine}{1kgBM} \times \frac{1mL Soluiton}{16.91mgKetamine} = 6.98 mL[/tex]

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Answer:

C4H9

Explanation:

If H = 15.88%

Then C = 100.00 – 15.88 = 84.12

Divide each % value by respective atomic mass

H = 15.88/1 = 15.88

C = 84.12/12 = 7.01

Divide through by smaller value

H = 15.88/7.01 = 2.26

C = 7.01/7.01 = 1

Remove fraction , multiply by 4

H = 9

C = 4

Empirical formula = C4H9

The hydrocarbon could be ( C4H9)2 = C8H18 = octane.

Answer:

Explanation:

Let the molar balance numbers be your guide.

N2 has  a one in  front of  it.

2 NH3 has a two in front of it.

Nitrogen has 5.50 moles given.

1 / 5.50 = 2 / x                 Cross multiply

1 x  = 2 * 5.50

x = 11.0

So if you use 5.5 moles of nitrogen, you get 11 moles of NH3

2.89 moles of water would be produced by the complete combustion of 44.5 grams of ethanol in the presence of excess oxygen.

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