in which layer of the Earth does the motion of the convention currente deve plate movement

Answer:

the water arrives on the earth in the form of water rich objects(planetesimals)

Answer:

decreases

Explanation:

Melting is the process of turning solid materials into liquids by introducing heat. If the mass of a stick of butter decreases then no mass was created when it melted.

Melting is the process of a solid changing from a solid to a liquid when heated to a specific temperature. The set temperature at which a solid begins to transform into a liquid is known as the melting point.

A substance will change from a solid to a liquid when the temperature is raised to its melting point. since of this, the substance's volume will grow since its molecules will be spaced more apart.

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The pH of the solution of the weak base here is 11.28.

We know that in this case, we have a weak base and we have been asked to obtain the pH of the solution. Let us note that the dissociation of the base would produce the hydroxide ion.

As such we have;

Ka = x^2/0.43 - x

x = concentration of the hydroxide ion

Then;

8.1 * 10^-6 = x^2/0.43 - x

8.1 * 10^-6(0.43 - x) = x^2

3.5 * 10^-6 - 8.1 * 10^-6x = x^2

x^2 +  8.1 * 10^-6x - 3.5 * 10^-6  = 0

x = 0.0019 M

pOH = -log( 0.0019)

= 2.72

pH = 14 - 2.72

= 11.28

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The application of force in the direction of the motion of an object. The second scenario involves applying force to a moving item that is traveling in the opposite direction.

A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. A force has both a direction and a magnitude.

Force is used to describe a body's tendency to modify or change its state as a result of an external cause. When force is applied, the body can also alter its size, shape, and direction.

A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects. The force is no longer felt by the two objects when the interaction ends.

Thus, Force applied to an item in motion that originates in any direction constitutes the third situation where force is created.

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The percentage yield of AgBr is 63.14%

We'll begin by writing the balanced equation for the reaction. This is given below:

Molar mass of Ag₂CO₃ = (2×108 ) + 12 + (3×16) = 276 g/mol

Mass of Ag₂CO₃ from the balanced equation = 1 × 276 = 276 g

Molar mass of AgBr = 108 + 80 = 188 g/mol

Mass of AgBr from the balanced equation = 2 × 188 = 376 g

From the balanced equation above,

276 g of Ag₂CO₃ reacted to produce 376 g of AgBr

From the balanced equation above,

276 g of Ag₂CO₃ reacted to produce 376 g of AgBr

Therefore,

5 g of Ag₂CO₃ will react to produce = (5 × 376) / 276 = 6.81 g of AgBr

Thus, the theoretical yield of AgBr is 6.81 g

Actual yield of AgBr = 4.3 g

Theoretical yield of AgBr = 6.81 g

\(percentage \: yield \: = \frac{actual}{theoretical} \times 100 \\ \\ percentage \: yield \: = \frac{4.3}{6.81} \times 100 \\ \\ percentage \: yield \: = 63.14\%\)

Thus, the percentage yield of AgBr is 63.14%

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Answer:

hydrogenphosphate I think

Answer:

3.

Explanation:

Hello there!

In this case, according to the definition of ionic bonds, whereby the cations give away their initial valence electrons to the anions, we infer that ionic species calcium bromide has three ions, one calcium ion and two bromide ions, and therefore the answer is 3.

Regards!

The mass of E85 fuel that has a specific gravity of 0.801 is 3032.11grams.

The specific gravity is the ratio of the mass of a substance to that of an equal volume of water at 4°C (or to some other reference substance).

The specific gravity is the ratio of the densities of two substances, which is the E85 fuel and water in this case.

The density of water = 1.00 g/cm³

Specific gravity = density of fuel/density of water

0.801 = density of fuel ÷ 1.000

density of fuel = 0.801g/cm³

1 us liquid gallon = 3785.412 cubic centimetres

0.801 = mass ÷ 3785.412

mass = 3032.11grams

Therefore, the mass of E85 fuel that has a specific gravity of 0.801 is 3032.11grams.

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Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual number = 200 g

error = 200 - 196.5 = 3.5

We have

\(p(\%) = \frac{3.5}{200} \times 100 \\ \)

We have the final answer as

Hope this helps you

One weakly bound intermediate is formed between the oxygen atom of O3 and one of the nitrogen atoms of NO, and another weakly bonded is formed between the oxygen atom of O3 and the nitrogen atom of NO.

The bond between nitrogen and oxygen in NO is partially broken, while the bond between the two oxygen atoms in O3 is also partially broken. The bonds between nitrogen and oxygen in NO2 and between the two oxygen atoms in O2 are partially formed.

Nitric oxide and ozone then easily combine to form nitrogen dioxide and oxygen. No net ozone gain occurs as a result of the technique mentioned above. Concentrations are higher in the troposphere than can be explained by these processes alone.

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Answer:

The answer is D

Explanation:

because insecticides are used for insects but pesticides are used to kill off unwanted plants

Answer:

B. herbicides

Explanation:

it kills weeds.

1)

Na3PO4 + H2SO4 => Na2SO4 + H3PO4

We must have the same number of atoms on both sides.

We start with Na,

2 Na3PO4 + H2SO4 =>3 Na2SO4 + H3PO4 (6 Na on both sides)

Then we proceed with P,

2 Na3PO4 + H2SO4 =>3 Na2SO4 +2 H3PO4 (2 P on both sides)

After that, we continue with S,

2 Na3PO4 + 3 H2SO4 =>3 Na2SO4 +2 H3PO4 (3 S)

The number of H and O are solved.

Answer: 2 Na3PO4 + 3 H2SO4 =>3 Na2SO4 +2 H3PO4

In an exothermic reaction, the reactants have more energy than the products.

Answer:

Molar mass of bromine is equal to \(80.9119\)

Explanation:

The molar mass of HBr is equal to the sum of atomic weight of  Bromine.

Atomic Weight of hydrogen is equal to \(1.00794\)

Atomic Weight  of Bromine is equal to \(79.904\)

Molar mass of Bromine

= Atomic Weight of hydrogen + Atomic Weight  of Bromine

Molar mass of Bromine  \(= 79.904 + 1.00794 = 80.9119\)

The phosphoric acid solution has a molarity of 0.3067 M.

The most common measure for expressing solution concentration is molarity (M), which is calculated by dividing the solute's mass in moles by the volume of the solution in litres: litres of solution/moles of solute equals M.

The term "molarity" (M) refers to the quantity of solute in moles per litre of solution. A clean 1-L volumetric flask should be halfway filled with distilled or deionized water to create a 1 M solution. Slowly add 1 formula weight of the chemical to the flask. Let the compound to completely dissolve, gently turning the flask as needed.

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Answer:

Beta

Explanation:

Cause it emits in and become platinum so I believe  its beta

If Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.

Radiation in the  chemistry is a branch of nuclear chemistry which deals with the study of the chemical effects of radiation of alpha beta and gamma rays  on matter or any radioactive atom of periodic table.

This is very different from radio-chemistry as no radioactivity or radioactive rays needs to be present in the material which is being chemically changed by the radiation by removing proton from the nucleus.

Therefore, Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.

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Answer:

 59.4 tons of iron can be isolated from this ore

Explanation:

mass of ore = 250 tons

mass of hematite = 34 % of 250

= 85 tons

mass of iron = 69.9 % of hematite

= 69.9 % of 85

= 59.4 tons

So,  59.4 tons of iron can be isolated from this ore .

Answer:

1. Mass of New atom = 208

2. Atomic number of the new atom is 82

3. Symbol of the new atom is Pb

Explanation:

²¹²₈₄Po —> ⁴₂He + ᴬZX

1. Determination of the mass A of the new atom.

212 = 4 + A

Collect like terms

212 – 4 = A

208 = A

A = 208

Therefore, the mass of the new atom is 208

2. Determination of the atomic number of the new atom.

84 = 2 + Z

Collect like terms

84 – 2 = Z

82 = Z

Z = 82

Therefore, the atomic number of the new atom is 82

3. Determination of symbol of the new atom

The atomic number of the new atom is 82. Comparing the atomic number of the new atom (i.e 82) with those in the periodic table, the new atom is Lead.

Lead has a symbol of Pb

Thus,

Mass of new atom (A) = 208

Atomic number of new atom (Z) = 82

Symbol of new atom (X) = Pb

Therefore,

ᴬZX = ²⁰⁸₈₂Pb

The balanced equation  \(K_{2}Cr_{2}O_{7}\) oxidizes KI in the presence of \(H_{2}SO_{4}\)can be represented as

6 KI + \(K_{2}Cr_{2}O_{7}\) + 7 \(H_{2}SO_{4}\) → 4 \(K_{2}Cr_{2}O_{7}\) + \(Cr_{2}(SO_{4})_{3}\) + 3 \(I_{2}\)\(I_{2}\) + 7 \(H_{2}O\)

The balanced equation for the oxidation of KI (potassium iodide) by \(K_{2}Cr_{2}O_{7}\)(potassium dichromate) in the presence of \(H_{2}SO_{4}\)(sulfuric acid) can be represented as follows:

6 KI + \(K_{2}Cr_{2}O_{7}\) + 7 \(H_{2}SO_{4}\) → 4 \(K_{2}Cr_{2}O_{7}\) + \(Cr_{2}(SO_{4})_{3}\) + 3 \(I_{2}\)\(I_{2}\) + 7 \(H_{2}O\)

In this equation, \(K_{2}Cr_{2}O_{7}\) is the oxidizing agent, and KI is the substance being oxidized. The sulfuric acid (\(H_{2}SO_{4}\)) serves as a catalyst and provides the necessary acidic conditions for the reaction to occur.

The products of the reaction are potassium sulfate (\(K_{2}SO_{4}\)), chromium(III) sulfate (\(Cr_{2}(SO_{4})_{3}\)), iodine (), and water (\(H_{2}O\)).

Note that this equation represents a stoichiometrically balanced equation, ensuring that the number of atoms of each element is the same on both sides of the equation.

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Answer:

down below

Explanation:

The police's influence can happen based on a response to a problem. An example is when the police are called because of a thief child. If the police handles the situation correctly-using reasonable force, if necessary, and reading them their rights- the public will perceive the police in a good light or way. If the police use gross misconduct and do not go by the book, then they will be perceived as an enemy or in a bad light or way.

Answer:

At is a metalloid

Explanation:  Meaning that it displays some of the characteristics of a metal but can also display characteristics of nonmetals.  Silicon is one such element.  Elemental Silicon has a dark lustrous metallic appearance but it is quite brittle.  Some authorities include Astatine as a halogen as it has seven electrons in its valence shell placing it just below iodine in period 17 VIIA.  Additionally, because Astatine is only ever found naturally as the result of radioactive decay from more dense elements it is the rarest naturally occurring element in Earth's crust.

I hope this helps at least a little.

Regards,

JR Holt

Chemist retired  

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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The Two Aspects of Science: Control over nature and understanding of nature must both be held in equal honor.

Answer:

D = M/V

Explanation:

D = 55.5g/11.5cm^3

D = 4.83g/cm^3

ideal gas

PV=nRT

T = PV/nR

T = 1 x 12/9 x 0.08205

T = 16.25 K

The answer is A: Oil.

Answer:

Explanation:

A. Oil

hope it helps!

Answer:

8.0g

Explanation:

the peoples place is it okay if you are sick of the way you welcomeeee is otay Mesa or something that would make it there for a long day to have the most beautiful and 2nd century old town n or the time of year and I don't think it's a big deal to get in on my own or not at McDonald's but you have a great deal on it is a bit too much for me and my husband is 6AM a good guy and he has a great time I'm just so happy to have him on my way to work and to get a job and get it done and then we will have a better for a better life than I loveeee to be with my wife in a relationship and then she will and I will always have a relationship

Answer:

7.57×10⁹ bacteria.

Explanation:

We'll begin by convert 100 gallons of water to millilitres (mL). This can be obtained as follow:

1 gallon = 3785.41 mL

Therefore,

100 gallons = 100 gallon × 3785.41 mL / 1 gallon

100 gallons = 378541 mL

Therefore, 100 gallons of water is equivalent to 378541 mL.

Next, we shall convert 378541 mL to drop of water. This can be obtained as follow:

1 mL = 1 drop

Therefore,

378541 mL = 378541 mL × 1 drop/ 1 mL

378541 mL = 378541 drop

Therefore, 378541 mL is equivalent to 378541 drops of water.

Finally, we shall determine the number of bacteria in 378541 drops of water as follow:

1 drop = 2×10⁴ bacteria

Therefore,

378541 drop = 378541 drop × 2×10⁴ bacteria / 1 drop

378541 drop = 7.57×10⁹ bacteria.

Therefore, there are 7.57×10⁹ bacteria in 100 gallons of water

Answer:

covalent bond

Explanation:

a covalent bond happens between two nonmetals

a ionic bond happens between a metal and a non metal

CO2 is a bond between carbon and oxygen

carbon and oxygen are both non metals therefore CO2 is a covalent bond