When an automobile engine starts, the metal parts immediately begin to absorb heat released during the combustion of gasoline. How much heat will be absorbed by a 165 kg iron engine block as the temperature rises from 15.7°C to 95.7°C? (The specific heat of iron is 0.489 J/g·°C.)

Answer:

Magma!

Explanation:

It's pretty interesting actually! The magma was poured out/ejected at Earth's surface.

The container's building bricks are a type of material known as a mixture since it consists of two different components.

A mixture of two chemicals would be the kind of substance represented in the diagram. This is so because the first brick is made of two separate elements, one of which is yellow and the other of which is black. The other block has a red and blue color scheme to indicate that it is also a composite made up of two separate elements.

Chemical reactions between two or more elements can result in the formation of compounds. Physical mixing of two or more substances results in the formation of mixtures. 2. Types. Three categories of compounds are possible.

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Answer: The element B will have ONE unpaired electron in the p orbital.

Explanation:

The electronic configuration of each given element is as follows.

Atomic number of calcium (Ca) is 20.

Ca: \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2}\)

Atomic number of nitrogen (N) is 7.

N: \(1s^{2} 2s^{2} 2p^{3}\)

Atomic number of boron (B) is 5.

B: \(1s^{2} 2s^{2} 2p^{1}\)

Atomic number of argon (Ar) is 18.

Ar: \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}\)

Atomic number of bromine (Br) is 35.

Br: \([Ar] 4s^{2} 3d^{10} 4p^{5}\)

Therefore, boron is the only element that have one unpaired electron in the p-orbital.

Thus, we can conclude that element B will have ONE unpaired electron in the p orbital.

Answer:

             5-bromo-2-methylheptane

Explanation:

                    Select heptane as the longest parent chain. Start numbering from methyl end because it is the smallest number as compare to 3 bromide (if started from the other end). Bromide will get 5th position. In writing the name bromo is written first due to alphabetical order.

The concentration of A after 38.02 s is 0.057 M.

The concentration of A after 38.02 s is calculated by using rate equation as follows;

[A] = [A]₀e^(-kt)

where;

The concentration of A after 38.02 s is calculated as;

[A] = [A]₀e^(-kt)

   = 0.95 M e^(-0.0739 s⁻¹  x 38.02 s)

   = 0.057 M

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1) Determine the number of subatomic particles.

A subatomic particle is smaller than an atom. Protons, neutrons, and electrons are subatomic particles.

Mass number: 28

This number is the number of protons plus neutrons in the nucleus.

Atomic number: 14

This is the number of protons in the nucleus.

Neutrons = mass number - atomic number

Neutrons = 28 - 14 = 14.

Electrons. = atomic number - charge

Electrtons = 14 - 0 = 14

This species of Silicon has 14 protons, 14 neutrons, and 14 electrons.

Answer:

group 17 the halogen.as it has 7 electron in its outermost ring

1. Water begins to boil - Endothermic

2. Fireworks explode - Exothermic

3. Sweat evaporates cooling your skin - Endothermic

4. Water begins to freeze into ice - Exothermic

5. You ignite your homework assignments once the year is over - Exothermic

6.Sunrays burn your skin - Exothermic

7.Cellular respiration - Exothermic

Exothermic and endothermic refer to two types of chemical reactions or physical processes that release or absorb energy, respectively.

Exothermic reactions release energy in the form of heat, light, or sound. When these reactions occur, they produce a net release of energy into the surroundings, which can often be felt as an increase in temperature. Examples of exothermic reactions include combustion, oxidation, and many types of explosions.

Endothermic reactions, on the other hand, absorb energy from the surroundings in order to proceed. These reactions typically feel cold to the touch and require energy to be added to the system in order to occur. Examples of endothermic reactions include melting, evaporation, and many types of chemical reactions that require heat to be added in order to proceed.

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Answer:

C.) No. of electrons

Explanation:

A.) is incorrect. The atomic number represents the number of protons in an element. Nitrogen (N) and sodium (Na) always have a differing amount of protons.

B.) is incorrect. The mass number represents the number of protons and neutrons in an element. The number of neutrons and protons are specific to each element (disregarding isotopes). When elements ionize, these amounts are not altered.

C.) is correct. When an element becomes an ion, the number of electrons change. When nitrogen gains 3 electrons and sodium loses 1 electron, they end up having the same number of electrons (10).

D.) is incorrect. When elements ionize, the number of neutrons does not change. The only way two different elements could have the same number of neutrons is if at least one of the elements is an isotope. Isotopes are two or more atoms of the same element that differ in their amounts of neutrons.

The compound that is shown as X can be seen in the option labelled C

The process of esterification involves the condensation of an alcohol (or phenol) with an acid to produce an ester. To create the ester bond, the water molecule must be removed from the alcohol and acid (dehydration).

Usually, an acid catalyst is used to catalyze the reaction, which makes it easier to remove water and encourages the creation of the ester. The acid catalyst aids in protonating the acid's carbonyl oxygen, which increases its electrophilicity and makes it more vulnerable to alcohol's nucleophilic attack.

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Answer:

Nebula Was Sent Into Space By Supernova

This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced. Over several months the gases cool and fade in brightness and join the debris of interstellar space.

Answer:   This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced. Over several months the gases cool and fade in brightness and join the debris of interstellar space.

Explanation:

Answer:

The three pKa values for phosphoric acid (H3PO4) are 2.12, 7.21, and 12.32.

Erosion and weathering are two processes that must occur to form soil.

Soil formation is the process by which soil is created over time through the physical, chemical, and biological interactions between rocks, minerals, organic matter, water, air, and living organisms.

Soil formation is a slow and complex process that can take centuries or even millennia, and it can be influenced by a variety of factors, including climate, topography, parent material, time, and human activities.

Weathering refers to the physical and chemical processes that break down rocks and minerals at or near the Earth's surface.

Erosion, on the other hand, refers to the movement and transport of weathered materials, such as soil, rock fragments, and sediment, by water, wind, or glaciers. This can result in the reshaping of landscapes, the creation of new landforms, and the deposition of sediments in new locations.

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Answer:

The solute is salt and the solvent is water

Explain:

Because salt is a component the dissolves in the solvent

Answer:

Most aren't able to take in carbon dioxide gas from the air or produce any oxygen.

Explanation:

science bro

Answer: 4

Explanation: because the zero doesn't count

Answer:

C) 0.800 mol

Explanation:

In order to convert from moles of Al₂O₃ into moles of Al, we'll need to use the stoichiometric coefficients, using a conversion factor that has Al₂O₃ moles in the denominator and Al moles in the numerator:

So the correct answer is option C).

The Sun-Earth-Moon system is important because it sustains life on Earth, regulates Earth's climate, and influences natural phenomena like tides.

The Sun-Earth-Moon system plays a vital role in supporting and sustaining life on Earth. The Sun is the primary source of energy for our planet, providing heat and light necessary for photosynthesis, the process by which plants convert sunlight into food and oxygen. Sunlight is also crucial for maintaining Earth's temperature and driving weather patterns.

The Moon, as Earth's only natural satellite, contributes to several essential functions. Its gravitational pull creates the tides, which influence coastal ecosystems and shape coastal landscapes.

The Moon's orbit also stabilizes Earth's axial tilt, providing a stable climate for life to thrive. Additionally, the Moon's phases have cultural and historical significance, influencing human activities such as agriculture, navigation, and calendar systems.

The Sun-Earth-Moon system's interactions are responsible for natural phenomena like eclipses, both solar and lunar, which have fascinated humans throughout history and continue to be important for scientific study and exploration.

Understanding these celestial events enhances our knowledge of astrophysics and helps us comprehend the vastness and complexity of the universe.

Furthermore, the study of the Sun-Earth-Moon system provides insights into celestial mechanics, orbital dynamics, and the broader field of planetary science. By examining the interplay between these celestial bodies, scientists can gain a deeper understanding of Earth's place in the universe and explore potential habitable conditions on other celestial bodies.

Overall, the Sun-Earth-Moon system is of immense importance as it sustains life, regulates climate, influences natural phenomena, and provides a platform for scientific exploration and discovery.

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Option C is the right answer

The medium through which the velocity of a sound wave is greatest is: C. steel.

A sound wave can be defined as a form of mechanical wave that requires a medium for its propagation and it creates a disturbance in the medium. Thus, a sound wave needs a medium to travel and it creates a disturbance when it travels through any medium.

Some examples of the parameters of a sound wave include the following:

Generally, the velocity of a sound wave is greatest in a solid medium such as steel than in liquid or gaseous medium.

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Considering the definition of molarity, the concentration of CH₃OH in the solution is 2.1875 \(\frac{moles}{liter}\).

Molarity is a measure of concentration that indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

\(Molarity=\frac{number of moles of solute}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

On the other hand, molar mass is the amount of mass that a substance contains in one mole.

Being the molar mass of CH₃OH 32.0 g/mol, then the number of moles that 35 g of the compound contain is calculated as:

\(35 gramsx\frac{1 mole}{32 grams} =\) 1.09375 moles

If 1.09374 moles of CH₃OH are dissolved in 500.0 mL= 0.500 L (being 1000 mL= 1 L) of solution, the molarity can be calculated as:

\(Molarity=\frac{1.09375 moles}{0.500 L}\)

Solving:

Molarity= 2.1875 \(\frac{moles}{liter}\)

Finally, the concentration of CH₃OH in the solution is 2.1875 \(\frac{moles}{liter}\).

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Temperature is supplied to us as 225 K. The reduction potential potentials will be used to get it equilibrium constant for the this reaction.

Definition of EQUILIBRIUM as a noun in the Britannica Dictionary. [noncount] 1. a condition when conflicting forces or acts are matched so that neither is stronger or more significant than the other.

The forces that affect the body must balance out with an equivalent and opposing force for there to be a condition of equilibrium. The physiological state of equilibrium, wherein forces internal and external are all in balance, in an active moving animal. The system is hence stable.

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Answer:

the amount of time he takes to react is the dependent variable

Explanation:

the independent variable is what you intentionally change in an experiment, and the dependent variable is what is changing based off of your independent variable. In this case, the IV is the sounds being played, and the DV is the amount of time it took Robert to react

The electronic configuration which represents a transition element is 1s²2s²2p⁶3s²3p⁶4s²3d⁷

Transition elements are placed between the metallic S-block elements and nonmetallic P-block elements in the periodic table. They are D-block elements and have features similar to both metals and nonmetals, to some extent. This is why they are called transition elements.

One remarkable feature of these elements happens during the addition of electrons to them. Contrary to S and P-block elements, electrons are added to the penultimate shell, not the last shell. These elements often feature partially filled d-orbitals and have multiple oxidation states.

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Answer:

5.6 g

Explanation:

The computation of the number of grams of silicon is shown below:

But before that we dop the following calculations

Given that

actual yield = 17 g

Now

Percentage of yield = actual yield × 100 ÷ theoretical yield

50 = 17 g × 100 ÷ theoretical yield

So,

theoretical yield = 34 g

Now

The Molar mass of SiCl_4,

MM = 1 × MM(Si) + 4 × MM(Cl)

= 1 × 28.09 + 4 × 35.45

= 169.89 g/mol

And,  

mass of SiCl_4 = 34 g

Also,

mol of SiCl_4 = (mass) ÷ (molar mass)

= 34 ÷ 1.699*10^2

= 0.2001 mol

The Balanced chemical equation is:

S_i + 2 Cl_2 —> SiCl_4

As per the balanced equation

mol of Si formed = moles of SiCl_4

= 0.2001 mol

Molar mass of Si = 28.09 g/mol

mass of Si = number of mol × molar mass

= 0.2001 × 28.09

= 5.6 g

Answer:

There is no graph

Explanation:

Answer:

D.) Paper will burn

Explanation:

The first three are physical properties of paper, but the last one is a chemical property of paper

Cu + O2 --->  CuO2 -The first reaction is a combustion reaction

2 HCl + Mg → H2 + MgCl2- The second reaction is a Single replacement reaction

A combustion reaction is a type of chemical reaction that occurs between a fuel and an oxidizer in the presence of heat or light, resulting in the release of energy in the form of heat and light.

In other words, it is a reaction in which a substance reacts with oxygen to produce heat and light.

Combustion reactions are important in many aspects of daily life, including the burning of fossil fuels for energy production, the combustion of wood or other materials for heating or cooking, and the combustion of fuels in internal combustion engines.

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The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.

Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :

k = 1/t ln (C0/Ct)

Where C0 be the initial concentration and Ct be the concentration after t seconds.

Given that C0 of ammonium nitrate = 0.957 M

rate constant = 0.196 /s

t = 39 s.

The concentration after 39 seconds is calculated as follows:

0.196 /s = 1/39s ln (0.957 M / Ct)

Ct = 0.957 / (ln⁻¹ (0.196 × 39))

    = 0.003 M.

Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.

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