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Answer:

Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.

Explanation:

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Hello! Your answer would be a gain of electrons and a decrease in positive charge.

Contrary to how it sounds, reduction is actually a gain of electrons. It is part of a set of reactions known as a redox reaction, reduction being a gain of electrons and oxidation being a loss.

With the gain of electrons, the element would become more negative as electrons bring with them a negative charge. Therefore, this would decrease the positive charge.

Hope this helped!

Answer:

I believe that the answers are:

1) loss

2) increase

Answer:

IRON NAIL

Explanation:

Answer:

B.) Iron nail

Explanation:

I took this quiz, k12 8th grade

Best of luck deary...<3

Best of luck to all future comers...<3

A metal cooking pot is an alloy.

Hence, Option (C) is correct answer.

An alloy is a mixture of metals and other elements. It is a substance which has metallic properties.

Examples: Steel is an alloy of iron and carbon. Bronze is an alloy of copper and tin. Brass is an alloy of copper.

A metal cooking pot are made from stainless steel, cast iron, copper or glass.

Thus, from the above conclusion we can say that A metal cooking pot is an alloy.

Hence, Option (C) is correct answer.

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The mass of the copper is approximately 1085.55 g.

To solve this problem, we can use the principle of heat transfer, which states that the heat lost by the metal (copper) is equal to the heat gained by the water.

The heat gained or lost by a substance can be calculated using the formula:

[tex]\[ Q = mc\Delta T \][/tex]

Where:

- Q is the heat gained or lost (in joules)

- m is the mass of the substance (in grams)

- c is the specific heat capacity of the substance (in J/g°C)

- [tex]\( \Delta T \)[/tex] is the change in temperature (in °C)

For copper, the specific heat capacity is approximately [tex]\( 0.385 \, J/g ^\circ C} \)[/tex], and for water, it's 4.18 J/g°C.

Let's denote:

- [tex]\( m_c \)[/tex] as the mass of the copper

- [tex]\( m_w \)[/tex] as the mass of the water

- [tex]\( \Delta T_c \)[/tex] as the change in temperature of the copper

- [tex]\( \Delta T_w \)[/tex] as the change in temperature of the water

Given:

- [tex]\( \Delta T_c = \Delta T_w = 5.5 \, ^\circ C} \)[/tex]

- [tex]\( c_c = 0.385 \, J/g^\circ C} \)[/tex] (specific heat capacity of copper)

- [tex]\( c_w = 4.18 \, J/g^\circ C} \)[/tex] (specific heat capacity of water)

- [tex]\( T_{c,i} = 75.6 \, ^\circ C} \)[/tex] (initial temperature of copper)

- [tex]\( T_{w,i} = 19.1 \, ^\circ C} \)[/tex] (initial temperature of water)

We can set up the equation:

[tex]\[ m_c \cdot c_c \cdot \Delta T_c = m_w \cdot c_w \cdot \Delta T_w \][/tex]

Solving for [tex]\( m_c \)[/tex]:

[tex]\[ m_c = \frac{m_w \cdot c_w \cdot \Delta T_w}{c_c \cdot \Delta T_c} \][/tex]

Substituting the given values:

[tex]\[ m_c = \frac{100.0 \, \text{g} \cdot 4.18 \, {J/g ^\circ C} \cdot 5.5 \, {^\circ C}}{0.385 \, {J/g^\circ C} \cdot 5.5 \, {^\circ C}} \][/tex]

[tex]\[ m_c = \frac{2299 \, \text{J}}{2.1175 \, \text{J}} \][/tex]

[tex]\[ m_c \approx 1085.55 \, \text{g} \][/tex]

So, the mass of the copper is approximately 1085.55 g.

Answer:

Hydrogen ion concentration is 2.773E-4Mole per DM3

Hydroxide ion concentration is 4.093E-11

It is an acid

Explanation:

PH(H3O)=-LogH3O

PH=3.557

H3O=antilog of -3.557

antilog of -3.557=antilog (0.443 -4)

antilog0.443 ×antilog -4=2.773E-4mole per DM3.

(H3O)(OH)=10^-14

H30=2.773×10^-14

OH= 1.00E-14/2.773E-4

=4.093E-11

it is an acid since the concentration of hydrogen ion is more than the hydroxide ion

Answer:

[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ions concentration in a solution. Lower the value of pH more acidic will the solution.

Mathematically written as:

[tex]pH=-\log[H^+][/tex]

The pOH of the solution is defined as negative logarithm of hydroxide ions concentration in a solution. Lower the value of pOH more alkaline will the solution.

Mathematically written as:

[tex]pOH=-\log[OH^-][/tex]

The sum of ph and pOH is equal to 14.

pH + pOH = 14

We have:

Solution with pOH = 3.557

The pH of the solution = 14 - pOH = 10.443

[tex]pH=-\log[H^+][/tex]

[tex]10.443=-\log[H^+][/tex]

[tex][H^+]=3.606\times 10^{-11} M[/tex]

[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.

[tex]pOH=-\log[OH^-][/tex]

[tex]3.557=-\log[OH^-][/tex]

[tex][OH^-]=0.0002773 M[/tex]

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.

Answer:

Steel is bonded together by a metallic bond.

Explanation:

There is attractions in the bond, Steel has negative electrons and positive ions, which attract each other. They hold the structure together thus forming a metallic bond.

Answer:

it is a base because they accept H+ ions

Explanation:

The correct answer is a base because they accept H+ ions.

          [tex]OH^{-} + H^{+}[/tex]⇄ [tex]H_{2}O[/tex]

Acetic acid provides a proton and functions as an acid in this process, whereas the water molecule (base) takes a proton.

[tex]CH_{3}CO_{2}H + H_{2}O[/tex] ⇄[tex]CH_{3}CO_{2} ^{-} + H_{3}O^{+}[/tex]

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Answer:

2AgCl == 2Ag + Cl2

Explanation:

when a white colour salt silver chloride is placed in a sunlight in a watch glass decomposition by sunlight takes place and this type of reaction is takes place when a single compound breaks down into two or more reactants name the energy is supplied in the form of Sunlight the following is the chemical equation for for this reaction

2AgCl == 2Ag + Cl2

Answer:

When white silver chloride is exposed to sunlight, thermal energy excites the silver atoms which appears in flakes and it is black in colour which overtime spreads over to the silver chloride which is white in colour and turns it grey.

This reactions with sunlight dissociate the silver atoms into silver metals and chlorine molecule and it's called PHOTOCHEMICAL REACTION, since its requires energy in form of light to be initiated. Silver chloride are kept in amber bottles away from sunlight so as to prevent this decomposition.

Sunlight

2AgCl —————》 2Ag + Cl2

Answer:

Explanation:

Molarity of acid(volume of acid)(# of H ions)= molarity of base(volume of base)(# of OH ions)

M(v)(#)=M(v)(#)

sulfuric acid    sodium hydroxide

H2SO4           NaOH

(3)(11.6)(2)=M(25)(1)

M=2.784

The molarity of the NaOH solution is 2.784 M

We'll begin by writing the balanced equation for the reaction.

From the balanced equation above,

The mole ratio of the acid, H₂SO₄ ([tex]n_{a}[/tex]) = 1

The mole ratio of the base, NaOH ([tex]n_{b}[/tex]) = 2

From the question given above, the following data were obtained:

Volume of acid, H₂SO₄ ([tex]V_{a}[/tex]) = 11.6 mL

Molarity of acid, H₂SO₄ ([tex]M_{a}[/tex]) = 3 M

Volume of base, NaOH ([tex]V_{b}[/tex]) = 25 mL

[tex]\frac{M_{a} V_{a}}{M_{b} V_{b}} = \frac{n_{a}}{n_{a}}\\\\ \frac{3 (11.6)}{M_{b} (25)} = \frac{1}{2}\\\\[/tex]

[tex]M_{b}[/tex] × 25 × 1 = 3 × 11.6 × 2

[tex]M_{b}[/tex] × 25 = 69.6

[tex]M_{b} = \frac{69.6}{25}\\ M_{b} = 2.784 M[/tex]

Therefore, the molarity of the NaOH solution is 2.784 M

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The atoms in a gas move at high speeds.

The atoms in a gas spread in all directions.

A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container.

Gas is one of the three main states of matter.

Gas is made up of atoms, tiny particles that makeup molecules, and molecules that move faster and further away as compared to other states of matter, which enables gas to fill a container evenly.

Hence, the atoms in a gas move at high speeds and the atoms in a gas spread in all directions.

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Final answer:

Gases consist of atoms that move at high speeds and spread in all directions, filling the volume of their container. They have no definite shape or volume and can be easily compressed or expand.

Explanation:

When considering the properties of gases, it's important to recognize several key characteristics that describe their behavior:

Therefore, the statements that best describe gases are:

Answer:B

Explanation:

Answer:All of them

Explanation:

Answer: The correct answer is all of them!

Explanation:

Looked at my lesson after seeing mixed answers and the correct answer is all of them!

Answer:

C. mobile electrons in the copper can shift without disrupting the solid

Explanation:

Most of the properties of metals results from the metallic bonds between atoms of the metals. The bond forms from the attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by the atoms losing their outermost shell electrons due to their low ionizatin energy.

This is not so in ionic solids.

Answer:

C

Explanation:

Answer: C. A thoroughly tested and widely accepted explanation. Explanation: A scientific theory is a coherent statement or set of ideas that explains observed facts or phenomenon and are thoroughly tested and widely accepted.

Answer:

The answer id D. on EDGEN.

Explanation:

D. He should divide 338.25 by 1000.

He should divide 338.25 by 1000. Hence, option D is correct.

Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.

To convert a joule measurement to a kilojoule measurement, divide the energy by the conversion ratio.

The energy in kilojoules is equal to the joules divided by 1,000.

[tex]\frac{338.25 J}{1000}[/tex]

= . 33825 kJ

Hence, .33825 kJ is the energy when we convert 338.25 J to kJ.

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I would go with option D.integumentary system

The uncontrolled expansion of a gas into a vacuum is an example of a free expansion of a gas. Therefore, the correct option is option D.

These really are adiabatic processes where no heat is transferred between both the system and its surrounding environment and therefore no work is performed on or by the system. These adiabatic processes are known as free expansion. A gas expands inside an enclosed evacuated chamber in an irreversible process.

It is also known as Joule expansion. The temperature of an ideal gas does not fluctuate (see Joule's Second Law), whereas actual gases suffer temperature changes during free expansion. Q = W = 0 in free expansion. The uncontrolled expansion of a gas into a vacuum is an example of a free expansion of a gas.

Therefore, the correct option is option D.

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Final answer:

A free expansion of a gas occurs when it expands into a vacuum, such as when gas confined in a flask fills up an adjoining vacuum flask upon opening a valve between them, increasing the entropy of the system without performing any work on its surroundings.

Explanation:

An example of a free expansion of a gas is the uncontrolled expansion of a gas into a vacuum. This process, also referenced as a macroscopic example of a particle-in-a-box model, involves a gas initially confined to one of two flasks. When a valve between the flasks is opened, the gas expands to fill the available volume in both flasks. This spontaneous expansion leads to an increase in the entropy of the system. Unlike scenarios where a gas expands as it heats up or performs work by pushing against the containers' walls, the unique characteristic of a free expansion is that it occurs without the gas performing any work on its surroundings and without a change in energy due to heat transfer.

Answer:

Here's what I get.

Explanation:

Bottom line: ask your teachers in advance what they expect.

Answer:

A. Visible light waves.

Answer: A Visible light waves

Explanation:

Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light.

The Electromagnetic spectrum involves gamma rays , X rays, ultra violet rays, visible rays, infrared rays, micro waves and radio waves which are arranged in order of increasing wavelength and decreasing frequency.

Visible region consists of violet, indigo, blue, green, yellow, orange and red light and they have wavelengths which are visible to naked eyes.

Answer:The density of an object is 8.54 g/mL

Explanation:

Answer:

The PV of products will be constant.

Explanation:

Ideal gas equation-   PV = nRT

where P is pressure of gas, V is volume of gas, n is number of moles of gas, R is gas constant and T is temperature (in Kelvin) of gas.

Now, number of moles of a gas remain constant with change in state variables.

So, if T is constant then the term "nRT" remins constant.

As PV is equal to nRT therefore PV will be constant if temperature is held constant.

In another way we can say if P is increased then V will decrease or vice versa.

Answer:

Be Constant

Explanation:

Answer:

The same amount of energy as

Explanation:

The complete combustion of 1 mole of glucose in a living cell releases the same amount of energy as the complete combustion of 1 mole of glucose by fire.

The same amount of glucose contains a fixed amount of energy

Answer: The same amount of energy

Explanation: Glucose the primary source of energy for all the living organism. In order to sustain a life, organisms need to use energy for all the vital processes of the body.

Combustion of glucose inside the body or combustion of glucose outside in the environment with the help of fire will generate the same amount of energy.

Hello There!

Your Answer is that “heat causes the gas particles in the can to move faster and farther apart.”

An aerosol is a tiny liquid or solid particle that is suspended in the atmosphere.

Answer:

It's the percent ratio of actual yield to the theoretical yield.

Explanation:

Theoretical yield is the calculated yield using the balanced chemical reaction. Actual yield is what is actually obtained in a chemical reaction. Percent yield is a comparison of the actual yield with the theoretical yield.

To compute the percent yield, it is first necessary to determine the theoretical yield, which is the maximum amount of product that could be formed from the given amounts of reactants. The theoretical yield is calculated based on the stoichiometry of the chemical equation. The actual yield, on the other hand, is what is actually obtained in a chemical reaction when it is carried out in the laboratory. The percent yield is then determined by calculating the ratio of the actual yield to the theoretical yield, multiplied by 100 to give a percentage.

Answer:

Explanation:

The noticeable exception in the trends of ionization energy of Mg and Al can best be explained using the arrangements of the electrons in the sub-levels.

Mg with 12 electrons has an electronic configuration of 2,8,2 = 1S²2S²2P⁶3S²

Al with 13 electrons has an electronic configuration of 2,8,3 = 1S²2S²2P⁶3S²3P¹

Lets take a little peep into what ionization energy is.

Ionization energy is a measure of the readiness of an atom to lose electron. The amount of energy needed to remove an electron is called the ionization energy. In this regard, the first ionization energy is the energy need to remove the valence or the most loosely held electron in an atom.

The magnitude of the ionization energy depends on a number of factors. The most important to our discuss here are:

The arrangement of electrons in Mg confers a special stability on it because of the filled sublevel.

The maximum number of electrons in each sub-levels are:

s-orbital = 2 electrons

p- orbital = 6 electrons

d - orbital = 10 electrons

f - orbital = 14 electrons

In Mg, 1S²2S²2P⁶3S² , the outermost s-sublevel have 2 electrons and s-orbital can accomodate a maximum of 2 electrons in this subshell. This makes the arrangement stable.

For Al, 1S²2S²2P⁶3S²3P¹,  the outermost p-subshell houses just one electron but it can accommodate a maximum of 6 electrons. This arrangement is unstable.

Due to this electron arrangements, Mg would have a very stable configuration and a greater first ionization energy compared to Al.

Answer:

Its lysogenic cycle if a virus integrates its DNA into host cell.

Explanation:

Bacteriophages are the viruses which infect bacteria. Viruses are obligatory parasites which need host for their survival. Viruses which infect bacteria can either take up the lytic cycle or lysogenic cycle. Lytic as the name suggests involves the lysis of host bacterial cell after the replication of virus. Once the bacterial cell is lysed and the virions are released they invade another host bacterial cell. In the other case i.e. lysogenic cycle, the bacteriophage after infecting the host bacterial cell integrates its genome into the host cell genome. At this stage we call it as prophage. The viral genome gets replicated with the host cell machinery but does not produces the viral protein and remains dormant with in the host cell. The integrated genome of virus is passed on to the daughter cells as the cell division occurs. Once the bacterial host cell condition becomes progressively worse, the reproductive cycle of virus begins resulting in the lysis of host cell.

Answer: 62g

Explanation: You add 24g and 38 grams because when a substance reacts with another substance there is the same amount of grams in the product, so there would be 62 grams in the product because that is the amount of grams there is in the reactants.

In a chemical reaction, 24g of magnesium reacts with 38g of fluoride to yield 62g of magnesium fluoride according to stoichiometry principles.

The question refers to a stoichiometry problem in chemistry related to the reaction of magnesium and fluoride to produce magnesium fluoride. Stoichiometry is the calculation of relative quantities of reactants and products in chemical reactions. Using the balanced equation for the reaction of magnesium and fluoride:

Mg + F2 → MgF2

In this reaction, one mole of magnesium reacts with one mole of fluorine to produce one mole of magnesium fluoride. Given the atomic masses (Mg = 24 g/mol, F =19 g/mol, MgF2 = 62 g/mol), this reaction signifies that 24g of Magnesium will react with 38g of Fluoride to produce 62g of Magnesium Fluoride. Therefore, the question's accurate answer is: 24g of magnesium reacts with 38g of fluoride to produce 62g of magnesium fluoride.

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Answer:

D. Energy is absorbed in an endothermic reaction

Explanation:

In all cases, an endothermic reaction is one in which is absorbed from the surroundings for the reaction to take place. After the reaction, the surrounding becomes colder as heat is drawn from it to furnish the reaction.

It is in an exothermic reaction that heat is liberated to the surroundings and this makes the surrounding hotter at the end of the reaction.

In some reactions, when bonds are broken, they can release energy and they can also absorb energy.

Answer:

D

Explanation:

Energy is absorbed in the form of heat

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