Which term means finding ways to describe and explain the natural world
through observations and experiments?
A. Pseudoscience
B. Philosophy
C. Chemistry
D. Science

It can be concluded that Solid A has a lower melting point than Solid B and Solid C. Solid B has a higher melting point than both Solid A and Solid C. Solid C has the highest melting point among the three solids.

The melting point of a substance is the temperature at which it changes from a solid to a liquid state. From the information provided, we can deduce the following:

Solid A and Solid B:

When a 50/50 mixture of Solid A and Solid B is formed, it has a lower melting point of 140-147 C. This suggests that Solid A has a lower melting point than Solid B since the mixture's melting point is below the individual melting points of both A and B.

Solid B and Solid C:

When a 70/30 mixture of Solid B and Solid C is formed, it has the same melting point as Solid C, which is 170-171 C. This indicates that Solid B has a higher melting point than Solid C since the mixture's melting point is equal to Solid C's melting point.

Combining these conclusions, we can summarize that Solid A has the lowest melting point, Solid B has a higher melting point than Solid A but lower than Solid C, and Solid C has the highest melting point among the three solids.

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Rutherford atomic hand drawn model sketched for you

Answer:

mass number

Explanation:

Answer and Explanation: The value closest to the mass of an atom is its mass number. The mass number is the total count of the protons and neutrons in the nucleus of the...

mass number

hope that helped

the answer to this question is that Kc for the reaction NH₄HCO₃ ⇌ H₂CO₃+ NH3 is less than 1.

we need to compare the equilibrium constant Kc for the reaction NH₄HCO₃ ⇌ H₂CO₃ + NH₃ to 1. We can do this by using the Ka or Kb values for the acid or base involved in the reaction.

The Ka value for H₂CO₃ is 4.3 × 10⁻⁷ while the Kb value for NH3 is 1.8 × 10⁻⁵. To determine the Kc for this reaction, we need to use the following equation:

Kc = [H₂CO₃][NH₃] / [NH₄HCO₃ ]

Using the Ka and Kb values, we can calculate the concentrations of H₂CO₃ and NH3 at equilibrium as follows:

[H₂CO₃] = √(Ka × [NH₄HCO₃ ])

[H₂CO₃] = √(4.3 × 10⁻⁷ × [NH₄HCO₃ ])

[NH3] = Kb × [NH₄HCO₃ ] / [H₂CO₃]

[NH3] = 1.8 × 10⁻⁵ × [NH₄HCO₃ ] / √(4.3 × 10⁻⁷ × [NH₄HCO₃ ])

Substituting these values into the Kc equation, we get:

Kc = [H₂CO₃][NH₃] / [NH₄HCO₃ ]

Kc = (4.3 × 10⁻⁷ × [NH₄HCO₃ ]) × (1.8 × 10⁻⁵ × [NH₄HCO₃ ] / √(4.3 × 10^⁻⁷ × [NH₄HCO₃ ])) / [NH₄HCO₃ ]

Kc = 7.5 × 10⁻¹¹ × [NH₄HCO₃ ]

Since we do not have a specific value for [NH₄HCO₃ ], we cannot determine the exact value of Kc. However, we can conclude that the value of Kc is less than 1, since the product of 7.5 × 10⁻¹¹and [NH₄HCO₃ ] must be less than 1 for Kc to be less than 1.

we used the Ka and Kb values for the acids and base involved in the reaction to calculate the concentrations of the products and reactants at equilibrium, and then used this information to determine the value of Kc for the reaction. By comparing this value to 1, we concluded that Kc is less than 1.

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The arrangement of electron pairs around n in nh3 and around c in ch4 are: In ammonia, there is 3 bond pair of electrons and one lone pair of electrons and in methane, there is 4 bond pair of electrons.

Electron is a loose and open-source software framework evolved and maintained by GitHub. The framework is designed to create desktop programs with the usage of net technology which can be rendered using a flavor of the Chromium browser engine, and a backend the use of the Node.js runtime environment.

An electron is a negatively charged subatomic particle that can be both sure to an atom or loose (not bound). An electron is sure to an atom is one of the 3 primary types of debris inside the atom -- the alternatives is protons and neutrons.

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Step-by-step explanation:

The number of carbon atoms present in the structure is 5

Each carbon atom carry four hydrogen atoms

The above organic structure is Pentane

Having a molecular formula of C5H12

Answer:

A proton

Explanation:

The parts of an atom are protons, electrons, and neutrons. A proton is positively charged and is located in the center or nucleus of the atom

The system would remain in equilibrium is the effect of decreasing the pressure on this system when it is in equilibrium. Hence, option A is correct.

According to Le Chatelier's principle, when a system at equilibrium is subjected to a change in temperature, pressure, or concentration, the system will respond in a way that tends to counteract the change and restore equilibrium.

Decreasing the pressure on the system will not affect the position of the equilibrium or the concentrations of the reactants and products.

The system will respond to the decrease in pressure by adjusting the rates of the forward and reverse reactions until a new equilibrium is established.

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Answer:

False

Explanation:

I have no explanation. I am guessing

HF and CH₃OH are molecules that  does not contain hydrogen bonding intermolecular attractive forces.

Option B and D are correct.

Unlike a covalent bond to a hydrogen atom, hydrogen bonding is a distinct type of dipole-dipole attraction between molecules. It results from the appealing power between a hydrogen particle covalently clung to an extremely electronegative iota like a N, O, or F molecule and another exceptionally electronegative molecule.

Intermolecular hydrogen bonding and intramolecular hydrogen bonding are the two main types of hydrogen bonds that have been discussed. The majority of intermolecular hydrogen bonding takes place between molecules with the same or different compounds.

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Answer:

nose

Explanation:

Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. Therefore, the wavelength of light is 2.41×10⁻⁷m.

Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave, light wave.

There is a relation between frequency of wave, and wavelength of wave

Mathematically,

ν=c÷λ

where,

ν=frequency of light=1.24 x10¹⁵s⁻¹

c is speed of light that is 3×10⁸m/s

λ is the wavelength of light=?

Substituting all the values

1.24 x10¹⁵s⁻¹=3×10⁸m/s÷λ

λ= 2.41×10⁻⁷m

Therefore, the wavelength of light is 2.41×10⁻⁷m.

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If 1.90 g of silver are produced from the reaction, then 0.0176 moles of copper(II) nitrate are also produced.

A chemical reaction occurs when moving molecules hit each other, breaking their bonds and producing an exchange of atoms that form new products. Another way a chemical reaction can occur is through the vibration of substances; when they do so with sufficient energy, they can be broken down into smaller molecules.

we need to use the balanced chemical equation,

3Cu(NO3)2 + 2Al → 3Cu + 2Al(NO3)3

we can see that 3 moles of Cu(NO3)2 react with 2 moles of Al to produce 3 moles of Cu. Therefore, the molar ratio of Cu(NO3)2 to Cu is 3:3 or 1:1.

m(Ag) = 1.90 g

M(Ag) = 107.87 g/mol

n(Ag) = m(Ag) / M(Ag)

n(Ag) = 1.90 g / 107.87 g/mol

n(Ag) = 0.0176 mol

The molar ratio of Cu(NO3)2 to Cu is 1:1, the moles of Cu produced in the reaction is also 0.0176 mol. So, the number of moles of Cu(NO3)2 produced is also 0.0176 mol.

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Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol

Calcium oxide is a drying agent that strongly interacts with water while absorbing carbon dioxide.

In the simplest described definition, a drying agent, as it pertains to industrial and chemical processes, is a term given to a chemical that works to remove water from a compound that is currently in solution.

A compound that has been absorbing water for too long, or for an extended period of time, can become contaminated. Calcium oxide is a drying agent that strongly interacts with water while absorbing carbon dioxide.

Therefore, calcium oxide is a drying agent that strongly interacts with water while absorbing carbon dioxide.

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After millions of years, finch populations may undergo significant changes through the process of natural selection, leading to the development of new species with unique physical and behavioral characteristics adapted to their environments.

This could include changes in beak shape and size, feeding habits, mating behaviors, and more. Over time, genetic mutations and environmental pressures will continue to shape the evolution of finches and other organisms, resulting in a diverse range of species that are better suited to survive and thrive in their respective habitats.

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they are

Group 1 are also called Alkali metals

They are

Lithium

Sodium

Potassium

etc.

Group 2 are also called Alkali earth metals

They are

Beryllium

Magnesium

Calcium

etc.

Group 3 are the first row of transition metals

They are

Scandium

yttrium

lutetium

lawrencium

Answer:

A. They don't form compounds

Explanation:

Answer:

they can form bonds with the electrons in the two outer most shells

Among the given options, an arrangement where two chlorine atoms are adjacent to each other would not be a possible arrangement monomer in polyvinyl chloride (PVC).

Polyvinyl chloride (PVC) is a polymer made from the monomer vinyl chloride, which has the chemical formula CH2=CHCl. In the polymerization process, multiple vinyl chloride monomers combine to form a long chain polymer structure.

In PVC, the chlorine atom (Cl) in the monomer is attached to the carbon atom adjacent to the double bond. The carbon-carbon backbone of PVC consists of alternating carbon and chlorine atoms along the polymer chain. This alternating arrangement of carbon and chlorine atoms gives PVC its characteristic properties, including its strength, durability, and resistance to chemicals.

Since the chlorine atoms are attached to alternating carbon atoms, it is not possible for two chlorine atoms to be adjacent to each other in the PVC polymer chain. If such an arrangement were to occur, it would result in an unstable structure that is not characteristic of PVC. Therefore, an arrangement where two chlorine atoms are adjacent would not be a possible arrangement in PVC.

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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 final temperature of the calorimeter after the combustion of 5.00 g of propanal is 34.7 °C.

What is Heat Capacity?

Heat capacity is a physical property of a substance that describes the amount of heat energy required to raise the temperature of a given amount of the substance by one degree Celsius (or one Kelvin). In other words, heat capacity is the measure of the ability of a substance to store heat energy.

The heat released by the combustion of 5.00 g of propanal is:

q = nΔrU

where n is the number of moles of propanal and ΔrU is the molar heat of combustion. The number of moles of propanal is:

n = mass / molar mass

n = 5.00 g / 58.0791 g mol-1

n = 0.086 mol

Substituting the values:

q = 0.086 mol x (-1822.7 kJ mol-1)

q = -156.6 kJ

The calorimeter absorbs this amount of heat, so the final temperature of the calorimeter can be calculated using the equation:

q = CΔT

where C is the heat capacity of the calorimeter and ΔT is the change in temperature.

Rearranging the equation gives:

ΔT = q / C

Substituting the values:

ΔT = -156.6 kJ / 13.9 kJ °\(C^{-1}\)

ΔT = -11.25 °C

Since the initial temperature of the calorimeter is 21.9 °C, the final temperature is:

Final temperature = initial temperature + ΔT

Final temperature = 21.9 °C + (-11.25 °C)

Final temperature = 10.65 °C

Therefore, the final temperature of the calorimeter is 34.7 °C (21.9 °C + 10.65 °C).

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Moving hot food in a covered pan to a cooler space, such as a storage room, or submerging it in ice water, is another option. Ice can also be used to hasten the cooling process.

Soups can be chilled by submerging them in cold water. This technique aids in a swift and secure drop in food temperature. To make a slush, put some ice in a big container or sink and add some water. After that, put the plate of food to be chilled into the ice bath. bathing in ice water and stirring the food often.Food is stirred with ice paddles, which are plastic containers that have been frozen after being filled with water.using ice as a component (if water is an ingredient).chiller that jars or tumbles.

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Answer:

visbility if that is an answer

Explanation:

Answer:

hope it helps...

Explanation:

Thermohaline circulation

Deep ocean currents are driven by density and temperature gradients. This thermohaline circulation is also known as the ocean's conveyor belt.

If my answers helped please comment...

Explanation:

The question had been explained.

Explanation:

Being made of charged particles can also do some things that gases can't do, such as conduct electricity. For instance, if you have gas in a liquid state, all of its particles will behave the same way once it's cool to room temperature.