A river and all of its tributaries make up a(n) _________.

Answer:b

Explanation: took the test

Prism separate white light, such as that from the Sun according to their wavelength.

Prism is an optical object which have three flat polished surfaces and a triangular shape, from which refraction of light takes place.

When the sunlight or any vissible light falls on the surface of prism then the refraction of light takes place and due to refraction bending of light at different angles according to their wavelength takes place. As we know that vissible light consist all colors, so the separation of white light into the colors takes place through prism.

Hence white light gets separated through prism.

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It took 14 years between the first man on the Moon and the first US woman in space.

The use of astronomy and space technology to explore outer space is known as space exploration. While astronomers use telescopes to explore space, physical exploration is carried out by both uncrewed robotic space probes and human spaceflight.

Understanding gravity, the magnetosphere, the atmosphere, fluid dynamics, and the geological evolution of other planets, for example, has come from studying the solar system.

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Taking into account the Boyle's law, 3.377 L of helium the tank will be able to  produce at a pressure of 94.2 kPa.

The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature, and moles.

Boyle's law is one of the gas laws that relates the volume and pressure of a certain quantity of gas kept at constant temperature.

This law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant. That is, if the pressure increases, the volume decreases; while if the pressure decreases, the volume increases.

Mathematically, Boyle's law states that the product of pressure and volume is constant:

P×V= k

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

P1× V1= P2×V2

In this case, you know:

Replacing in Boyle's law:

101 kPa× 3.15 L= 94.2 kPa× V2

Solving:

\(V2=\frac{101 kPa x3.15 L}{94.2 kPa}\)

V2= 3.377 L

In summary, 3.377 L of helium the tank will be able to  produce at a pressure of 94.2 kPa.

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C. Cancer that affects the blood

Hope I could help!

When 1-propene and HBr are combined in the first reaction, an ionic mechanism drives the production of 2-bromo propane. When 1-propene and a bromine molecule interact for the second time.

Most often, molecules with excellent leaving groups connected to sp3 carbons are eliminated processes to produce alkenes. Examples of these reactions are the dehydrohalogenations with strong bases and the alcohol dehydrations catalyzed by acids.

Although alkenes can react in many different ways, electrophilic addition reactions are by far the most frequent. In an addition reaction, two smaller molecules are combined to form one larger molecule.

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Answer:

The Lewis structure is attached with the answer -

Explanation:

Lewis structure or Lewis dot diagram are diagrams or representation of showing the bonding between different or same atoms of a molecule in any and also shows lone pairs of electrons that may exist in the molecule as dots.

HBrO₄ is bromine oxoacid which is also known as perbromic acid. It is a unstable inorganic compound.

The Lewis structure is attached in form of image with representation of lone pairs of electrons.

Answer:

Chemical property is a characteristic of a particular substance that can be observed in a chemical reaction.

Explanation:

Hope this helps :)

Answer:

A chemical property is any of a material's propertiesthat becomes evident during, or after, a chemicalreaction; that is, any quality that can be established only by changing a substance's chemical identity. ... They can also be useful to identify an unknown substance or to separate or purify it from other substances.

Answer:

Explanation:

Answer:

I need this too but nobody knows how :(

Explanation:

Answer:

3.6

Explanation:

subtract both numbers!

Answer:Approx....

8

⋅

g

⋅

m

L

−

1

....

Explanation:

ρ

,

density

=

Mass

Volume

=

28.5

⋅

g

(

49.10

−

45.50

)

⋅

m

L

=

7.92

⋅

g

⋅

m

L

−

1

....

Explanation:

Answer:

See explanation

Explanation:

Let us see what happens when each solution is mixed;

a) AlCl3(aq) + K3PO4(aq) ------> 3KCl(aq) + AlPO4(s)

A precipitate is formed here

b) RbCO3(aq) + NaCl(aq) -------> This is an impossible reaction hence no solid precipitate is formed here

c) MnCl2(aq) + Na2CO3(aq) → 2NaCl(aq) + MnCO3(s)

A precipitate is formed.

d) K2S(aq) + 2NH4Cl(aq) ------> 2KCl(aq) + (NH4)2S(aq)

No solid precipitate is formed

e) CaCl2(aq) + (NH4)2CO3(aq) → CaCO3(s) + 2NH4Cl(aq)

A solid precipitate is formed

Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

The electron configurations that are not valid among the options are 1s²2s²2p 3s 3p 4s²4d¹04p5 and 1s²2s²2p 3s³3d5. Options 1 and 2.

The electron configuration of atoms using the various orbital levels follows the order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.

Also, according to Afbau principle, orbitals with low energy levels are filled with electrons before orbitals with higher energy levels.

Using the above,  1s²2s²2p 3s 3p 4s²4d¹04p5 is incorrect for some reasons:

1s²2s²2p 3s³3d5 is incorrect because:

The remaining electron configurations are correct with correctly placed electrons in the various orbitals.

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The concentration in mol L-l (M) = 0.717

Given

12% solution of tetrahydrate magnesium chloride (MgCl₂)

Required

The concentration

Solution

Tetrahydrate magnesium chloride (MgCl₂)⇒MgCl₂.4H₂O

MW = Ar Mg+2. Ar Cl+8. Ar H + 4. Ar O

MW=24.31 + 2 x 35.45 + 8 x 1.01 + 4 x 16

MW=24.31+70.9+8.08+64

MW=167.29 g/mol

12% solution = 12 % m/v = 12 g in 100 ml solution

For 1 L solution :

\(\tt \dfrac{1}{0.1}\times 12~g=120~g\)

The concentration in g/L = 120 g/L

Convert grams to moles :

\(\tt mol=\dfrac{120}{167.29}=0.717\)

The structure of the compound that have been described in the question is shown in the image attached to this answer.

We know that in organic chemistry, the structure of a molecule is very instrumental to the way that the molecule would be able to undergo reaction. In this case, we have a compound that is said to have  5 carbons, 3 chlorine group side chains, and one propyl group side chain.

Our key task is first to visualize the molecule and they try to create the structure of the molecule. As we try to create the structure of the molecule, we must have in mind the tetravalence of carbon. That is, carbon can only form four bonds to itself.

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1. For the pair of half-reactions:

Pt2+(aq) + 2e- → Pt(s)    ... (1)

Sn2+(aq) + 2e- → Sn(s)    ... (2)

To obtain the balanced equation for the overall cell reaction, we need to multiply the half-reactions by appropriate coefficients to ensure that the number of electrons transferred is equal. In this case, we can multiply equation (1) by 2 and equation (2) by 1:

2(Pt2+(aq) + 2e-) → 2(Pt(s))

Sn2+(aq) + 2e- → Sn(s)

Combining the equations, we have:

2Pt2+(aq) + Sn2+(aq) → 2Pt(s) + Sn(s)

The cell notation for this reaction is:

Pt2+(aq) | Pt(s) || Sn2+(aq) | Sn(s)

To calculate the standard cell potential (E°), we need to know the standard reduction potentials for Pt2+/Pt(s) and Sn2+/Sn(s) half-reactions. Referring to standard reduction potential tables, we find:

E°(Pt2+/Pt(s)) = +1.20 V

E°(Sn2+/Sn(s)) = -0.14 V

The overall cell potential (E°cell) is the difference between the reduction potentials:

E°cell = E°(cathode) - E°(anode) = 0.00 V - (-0.14 V) = +0.14 V

Therefore, the standard cell potential for this reaction is +0.14 V.

2. For the pair of half-reactions:

Co2+(aq) + 2e- → Co(s)    ... (3)

Cr3+(aq) + 3e- → Cr(s)    ... (4)

To balance the number of electrons transferred, equation (4) can be multiplied by 2:

2(Co2+(aq) + 2e-) → 2(Co(s))

Cr3+(aq) + 3e- → Cr(s)

Combining the equations, we have:

2Co2+(aq) + Cr3+(aq) → 2Co(s) + Cr(s)

The cell notation for this reaction is:

Co2+(aq) | Co(s) || Cr3+(aq) | Cr(s)

To calculate the standard cell potential (E°), we refer to the standard reduction potentials:

E°(Co2+/Co(s)) = -0.28 V

E°(Cr3+/Cr(s)) = -0.74 V

The overall cell potential (E°cell) is the difference between the reduction potentials:

E°cell = E°(cathode) - E°(anode) = -0.74 V - (-0.28 V) = -0.46 V

Therefore, the standard cell potential for this reaction is -0.46 V.

3. For the pair of half-reactions:

Hg2+(aq) + 2e- → Hg (l)    ... (5)

Cr2+(aq) + 2e- → Cr(s)    ... (6)

The equation for the overall cell reaction can be obtained by multiplying equation (6) by 2:

2(Hg2+(aq) + 2e-) → 2(Hg (l))

Cr2+(aq) + 2e- → Cr(s)

Combining the equations, we have:

2Hg2+(aq) + Cr2+(aq) → 2Hg (l) + Cr(s)

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7.0329 x10 mm] -4.43x104m√ = 2. * 6029 * Ten ^ - 4 * m I Water has a surface tension of 72.0 mJ/m2 at normal temperature.

What kind of energy is needed to transform a water drop with a 2.20 mm diameter into four smaller drops with the same size?

At room temperature, water has a surface tension of 72.0 mJ/m2.

I'll try it out even if it seems like a physics challenge rather than a chemical one.

Surface area of the sphere equals 4 r2.

Radius, diameter, and volume of sphere are equal to (4/3)r3 2.20 mils = 1.10 mils

The four new droplets' surface tension differences with the original droplet are?

The energy needed to complete the specified task would be 0.00173 mary jane - 0.00114 w / mk = 0.00059 mary jane = 5.9x10-4 mJ.

(NOTE: I just saw Brian L's "comment," and this solution is in fact rather similar to his response of 6.4x10-4 mJ.)

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7.0329 x10 mm] -4.43x104m√ = 2. * 6029 * Ten ^ - 4 * m I Water has a surface tension of 72.0 mJ/m2 at normal temperature.

At room temperature, water has a surface tension of 72.0 mJ/m2.

I'll try it out even if it seems like a physics challenge rather than a chemical one.

Surface area of the sphere equals 4 r2.

Radius, diameter, and volume of sphere are equal to (4/3)r3 2.20 mils = 1.10 mils

The four new droplets' surface tension differences with the original droplet are?

The energy needed to complete the specified task would be 0.00173 mary jane - 0.00114 w / mk = 0.00059 mary jane = 5.9x10-4 mJ.

(NOTE: I just saw Brian L's "comment," and this solution is in fact rather similar to his response of 6.4x10-4 mJ.)

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447.8 liters of \(H_{2}\) can be produced at STP using 80.0 g of methane and 16.3 g of water, and water is the limiting reactant.

Limiting reactant is a chemical reactant used in a reaction that is completely used up before any other reactant is used. It limits the amount of product that can be produced in a given reaction.

Methane \((C*H_{4})\) reacts with water \((H_{2}O)\)to produce hydrogen \((H_{2})\) and carbon dioxide \((C*O_{2})\). The equation for this reaction is:
\(C*H_{4} + 2H_{2}O \rightarrow C*O_{2} + 4H_{2}\)
Using the given masses of reactants, we can calculate the number of moles of methane and water.
Methane: \(80.0 g C*H_{4} × 1 mol C*H_{4}/16.04 g C*H_{4} = 4.99 mol C*H_{4}\)

Water: \(16.3 g H_{2}O × 1 mol H_{2}O/18.02 g H_{2}O = 0.90 mol H_{2}O\)
Now we can use the mole ratio from the balanced equation to determine the limiting reactant.
Methane: \(4.99 mol C*H_{4}/1 mol C*H_{4} = 4.99 mol C*H_{4}\)
Water: \(0.90 mol H_{2}O/2 mol H_{2}O = 0.45 mol H_{2}O\)
Since the mole ratio of water is lower than that of methane, water is the limiting reactant.
Now we can use the molar ratio of the reaction to calculate the number of moles of hydrogen produced.
\(4.99 mol C*H_{4} × 4 mol H_{2}/1 mol C*H_{4} = 19.96 mol H_{2}\)
Finally, we can use the ideal gas law to calculate the number of liters of H_{2} at STP (standard temperature and pressure).
\(19.96 mol H_{2} × 22.4 L H_{2}/1 mol H_{2} = 447.8 L H_{2}\)
Therefore, 447.8 liters of \(H_{2}\) can be produced at STP using 80.0 g of methane and 16.3 g of water, and water is the limiting reactant.

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By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers.

By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers. Energy storage's inherent ability to offer backup power in the event of grid failure is a feature that both residential consumers and commercial owners find highly desirable.

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Answer:

NO I DON'T ✌✌✌✌✌✌✌✌✌

Answer:

0.81 mol

Explanation:

Since the mole ratio of Ba : BaN2 = 3 : 1 (which can be seen from the balanced equation)

Therefore, 3 moles of Barium metal will produce 1 mole of BaN2.

With this ratio, let the no. of moles of barium metal be x.

\(\frac{3}{1} = \frac{x}{0.270} \\x = (0.2703)(3)\\x = 0.81 mol\)

While isobaric heat can be measured by using the coffee cup calorimeter, Bomb calorimetry is the device that would be needed to measure the reaction heat under isochoric condition.

A thermodynamic process known as an isochoric process occurs when the closed system's volume maintains consistent (V = const). It explains the non-deformable behaviour of the gas inside the container.

Heat transmission from one location to another of the system only modifies the internal energy of the system (the temperature) because the volume stays constant. While isobaric heat can be measured by using the coffee cup calorimeter, Bomb calorimetry is the device that would be needed to measure the reaction heat under isochoric condition.

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Answer:

Li

Explanation:

The element, Neon (Ne), is the smallest among the given elements

From the question,

We are to determine which of the given elements is the smallest.

The given elements are

Be - Beryllium  

Ne - Neon  

O - Oxygen

Li - Lithium

B - Boron

From the periodic table, we can observe that all of the given elements belong to period 2.

Using the trend of atomic size on the periodic table,

We know that, atomic size decreases across the period.

This means, the atomic sizes of the elements will decrease in the order

Li > Be > B > O > Ne

Hence, the element, Neon (Ne), is the smallest among the given elements

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Answer:

Covalent bond involves the sharing of electrons, while metallic bonds have strong attractions and ionic bonds involve the transferring and accepting of electrons from the valence shell. The adhering property of an atom, in order to arrange themselves in a most stable pattern by filling their outermost electrons orbit

Explanation:

hope it helps:)

Answer:

\(\(\purple{\rule{45pt}{7pt}}\purple{\rule{45pt}{999999pt}}\(\)

Explanation:

\(\(\purple{\rule{45pt}{7pt}}\purple{\rule{45pt}{999999pt}}\(\)

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Explanation:

10xocular lens and 40x objective lens