the train traveled 100 miles in 4 hours how fast was the train traveling

Answer:

1.717

Explanation:

A single electron is present in the valence shell of sodium shown.

What is a valence shell?

In chemistry and physics, the valence electron is an electron that is part of the outer shell of an atom. When the outer shell is open, the valence electron can participate in the formation of a chemical bond. Each atom in a bond contributes a valence electron and forms a common pair in a single covalent bond. The valence shell of an atom refers to its outermost orbit or shell. These electrons are necessary for creating bonds between atoms. It can be filled whole or in part.

So, as you can see from the diagram, we see that there is only one electron in the valence shell.

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Answer:

A reaction that has the same number and type of atoms on each side of the equation

Explanation:

A pex

The oxidation of a) 1-hexanol b) 2-hexano c) hexanal with CrO3 in aqueous acid gives 1-hexanoic acid, 2-hexanone and 1-hexanoic acid respectively. The oxidation with PCC gives 1-hexanaldehyde, 2-hexanone and no reaction respectively.

What is PCC?

PCC is also called as pyridinium chlorochromate which is a yellow-orange salt. this is primarily used for the oxidation of alcohols which gives carbonyl compounds as products. It is one of the highly effective oxidizing agents for alcohols.

The oxidation of alcohols with CrO3 gives carbonyl compounds like aldehydes and ketones. With primary alcohol and aldehydes it gives carboxylic acid, whereas with secondary alcohol it gives ketones as products. PCC with primary alcohols give aldehyde, with secondary alcohols give ketone and with aldehyde there is no reaction.

Therefore, CrO3 with 1-hexanol and hexanal gives 1-hexanoic acid, with 2-hexanol gives 2-hexanone. PCC with 1-hexanol gives 1-hexanaldehyde, 2-hexanol gives 2-hexanone and with hexanal there is no reaction.

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The molarity of a solution with 952 grams of ammonium carbonate dissolved to make 1750 ml of solution is: 0.54 mol/L.

The molarity of a solution can be calculated by dividing the amount of solute (in this case ammonium carbonate) by the volume of the solution. In this case, 952 grams of ammonium carbonate are dissolved in 1750 mL of solution. Therefore, the molarity of the solution can be calculated as follows:

Molarity = (952 g ammonium carbonate) / (1750 mL solution) = 0.54 mol/L

To calculate the molarity, first, we need to calculate the moles of ammonium carbonate. We can do this using the molar mass of ammonium carbonate, which is 53.49 g/mol. We divide the mass of ammonium carbonate by its molar mass to get the number of moles:

(952 g ammonium carbonate) / (53.49 g/mol) = 17.77 mol

Then, we divide this number by the volume of the solution (in liters):

(17.77 mol) / (1750 mL/1000 mL/L) = 0.54 mol/L

Therefore, the molarity of the solution is 0.54 mol/L.

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The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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The type of reaction represented by Ba(ClO3)2 → BaCl2 + 3O2 is a decomposition reaction, in which Ba(ClO3)2 undergoing decomposition by releasing oxygen gas.

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances. In this reaction, the compound Ba(ClO3)2 decomposes into two simpler substances: BaCl2 and O2.

Ba(ClO3)2 is barium chlorate, which consists of barium ions (Ba2+) and chlorate ions (ClO3-). During the decomposition reaction, the compound breaks apart into BaCl2, which contains barium ions (Ba2+) and chloride ions (Cl-), and O2, which represents oxygen gas.

The balanced chemical equation for the decomposition reaction is:

2 Ba(ClO3)2 → 2 BaCl2 + 3 O2

This equation indicates that two molecules of Ba(ClO3)2 decompose to form two molecules of BaCl2 and release three molecules of O2 gas.

The reaction Ba(ClO3)2 → BaCl2 + 3O2 represents a decomposition reaction. In this reaction, the compound Ba(ClO3)2 breaks down into BaCl2 and releases oxygen gas (O2).

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Biodiversity conservation is the only way to prevent extinctions. Conservation of biodiversity is essential for the survival of both flora and fauna on the planet. It includes habitat preservation, reducing pollution, minimizing invasive species, and controlling environmental factors that threaten life on Earth.

The conservation of biodiversity can take various forms, including in-situ and ex-situ conservation. In-situ conservation is the conservation of plants and animals in their natural habitats. This conservation form mainly includes the creation of national parks, wildlife sanctuaries, and biosphere reserves to preserve and maintain natural habitats of different species. Ex-situ conservation is the conservation of plants and animals outside their natural habitat. This conservation form mainly includes seed banks, botanical gardens, and zoological parks, which store genetic diversity for future use.

To prevent extinctions, it's crucial to protect biodiversity by implementing policies that protect natural habitats, which are necessary for the survival of endangered species. In addition, governments can establish protected areas, restore ecosystems, and introduce more comprehensive conservation measures to prevent extinction. In conclusion, to prevent extinction, we must conserve biodiversity, including preserving habitats, preventing pollution, and controlling environmental factors that threaten life on Earth.

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Answer:

organs group together to form organ systems

Explanation:

Claim: The separation of Mesosaurus fossils can be explained by the continental drift hypothesis. Evidence: Fossil Distribution, Geological Similarities, Matching Climate and Habitat. The distribution of Mesosaurus fossils across South America and Africa, the geological similarities between these regions, and the matching climate and habitat conditions all support the claim that the separation of Mesosaurus populations can be explained by the process of continental drift.

Claim: The separation of Mesosaurus fossils can be explained by the continental drift hypothesis.

Evidence:

Fossil Distribution: Mesosaurus fossils are found in both South America and Africa. This distribution aligns with the hypothesis of continental drift, which suggests that these continents were once connected and later separated. The similarity in fossil remains on different continents supports the claim that Mesosaurus populations were separated when the continents drifted apart.

Geological Similarities: The geological formations and sedimentary layers in which Mesosaurus fossils are found in South America and Africa display remarkable similarities. This similarity implies that these regions were once part of the same landmass and were subsequently separated. The matching geological features provide further evidence for the separation of Mesosaurus populations due to continental drift.

Matching Climate and Habitat: Mesosaurus fossils indicate that the species was adapted to a freshwater environment. The presence of similar freshwater environments in both South America and Africa further supports the claim that Mesosaurus populations were separated when the continents drifted apart. The matching climate and habitat conditions provide evidence that supports the idea of geographic isolation and subsequent speciation.

In conclusion, the distribution of Mesosaurus fossils across South America and Africa, the geological similarities between these regions, and the matching climate and habitat conditions all support the claim that the separation of Mesosaurus populations can be explained by the process of continental drift.

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The prefix "Com-" means "together" or "with," while the prefix "Con-" means "together" or "in association with." The suffix "-stasis" means "contraction," while the suffix "-spasm" means "sudden and involuntary contraction."

The prefix "Com-" means "together" or "with," while the prefix "Con-" means "together" or "in association with." Examples include "compression" (pressing together) and "conjunctiva" (a membrane that joins the eyelid and eye).

The suffix "-stasis" means "contraction," particularly in reference to the movement of muscles in the digestive or urinary tract, while the suffix "-spasm" means "sudden and involuntary contraction." Examples include "peristalsis" (the coordinated contraction of muscles in the digestive tract to move food) and "laryngospasm" (a sudden and involuntary contraction of muscles in the larynx, causing difficulty breathing).

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Answer:

Explanation:

2.2 pounds = 1 kg

495 pounds = x

2.2/495 = 1/x               Cross multiply

2.2*x = 495 * 1             Divide by 2.2

2.2x/2.2 = 495/2.2

x = 225 kg

Answer:

Very fast

Explanation:

Answer:

Physical

Explanation:

When a substance changes from liquid to gas it's a physical change. There is no chemical reaction between the rubbing alcohol or anything else that would change it's chemical composition.

Answer:

B. 313.8

Explanation:

Answer:

Density of water is 1, mass of 1000 divide by the volume of 1000 gram in a liter is 1

Explanation:

i hope this helps :)

Answer:

I think it is a covalent bon

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Best describe table sugar is considered a pure substance is Sugar has the same chemical composition throughout

Table sugar is pure sucrose derived from sugar beet or sugar cane and sucrose is the disaccharide consisting of glucose and fructose and it is produced by green plant in the process of photosynthesis and since the chemical composition of sugar is definite and does not vary hence it is pure substance and table sugar refer to standard while white sugar that you see in your cooking baking or cup of tea at home and the scientific name foe table sugar is sucrose

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There are several videos available that cover the in's and out's of molarity, including practice problems. One of the best sources for such videos is the Khan Academy, which offers a wide range of educational videos on topics such as chemistry, math, biology, physics, and more. Their videos are high-quality, comprehensive, and easy to follow, making them ideal for students who want to learn more about molarity and other related concepts in chemistry.

Yes, there are several videos available that cover the in's and out's of molarity, including practice problems. One of the best sources for such videos is the Khan Academy, which offers a wide range of educational videos on topics such as chemistry, math, biology, physics, and more. Their videos are high-quality, comprehensive, and easy to follow, making them ideal for students who want to learn more about molarity and other related concepts in chemistry.
To find a video about molarity on the Khan Academy, you can go to their website and search for the term "molarity" in the search bar at the top of the page. This will bring up a list of videos related to this topic, including some that cover the basics of molarity, while others provide more advanced information.
Once you find a video that you like, you can watch it online or download it to your computer for later viewing. Some of the most popular videos on this topic include "Molarity, molality and normality" and "Solving Molarity Problems." These videos cover a wide range of topics related to molarity, including how to calculate molarity, how to convert between different units of concentration, and how to use molarity to solve problems in chemistry.
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Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Answer: D convection currents

Explanation:

The seafloor spreading is a phenomena that occurs due to liberation of heat from the convection currents generated in the mantle. It makes the earth crust more plastic and less dense. This happens at divergent plate boundaries. As the plates move apart, the less denser material rises. It leads to the formation of mountain and crust cracks.

The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

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Answer:

that something in the air is oxygen

Answer:

check all of them

Explanation:

Brainly is erroneously blocking my answer from being posted due to nonexistent profanity and/or links, so I have attached an image of my written response. Please let me know if you have any problems seeing it.

Answer:

Moving water helps plant's and islands form and grow. Which shapes earth.

The standard potential for the given galvanic cell is +1.06 V.

To calculate the standard potential for the given galvanic cell, we need to determine the individual reduction potentials of the half-reactions and then subtract the potential of the anode (where oxidation occurs) from the potential of the cathode (where reduction occurs).

Given reduction half-reaction potentials:

Ag+(aq) + e^− → Ag(s): E∘ = +0.80 V

Ni2+(aq) + 2e^− → Ni(s): E∘ = -0.26 V

Since we have the reduction potentials for both half-reactions, we can directly calculate the standard potential for the cell:

E∘(cell) = E∘(cathode) - E∘(anode)

= E∘(Ag+(aq) + e^− → Ag(s)) - E∘(Ni2+(aq) + 2e^− → Ni(s))

E∘(cell) = +0.80 V - (-0.26 V)

= +1.06 V

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Answer:

A and D

Explanation:

Answer:

A & D

Explanation: