Explanation:
Nuclear reactions are defined as the reaction in which there occurs change in the nucleus of an atom due to change in number of protons or neutrons of an atom.
For example, [tex]^{2}_{1}H + ^{2}_{1} \rightarrow ^{4}_{2}He[/tex] is a nuclear reaction.
Hence, identity of the element changes in a nuclear reaction. Also, nuclear reaction can occur at varied rates as they are not affected by temperature, pressure or catalyst.
Whereas a chemical reaction is defined as the reaction where there occurs exchange of electrons between the combining atoms.
For example, [tex]2Na(s) + Cl_{2}(g) \rightarrow 2NaCl[/tex] is a chemical change.
Thus, we can conclude that nuclear reactions are different from chemical reactions as follows.
In nuclear reactions, the identities of the elements change.In nuclear reactions, the reactions happen at a varied rate.Should we only write condensed formula in chemical equations (for lessons like carbon and compounds). What did your teachers say? Plz make it fast as my exam is tomorrow!
Answer:
Here's what I get.
Explanation:
If your teachers don't ask for a specific type of formula, a condensed structural formula should be OK. If they ask specifically for a structural formula or a bond-line formula, that is what you must give.Bottom line: ask your teachers in advance what they expect.
7. In the cycle, a virus integrates its DNA into the host's DNA, and its DNA is replicated when the host
DNA is replicated.
A. infectious
B. retroviral
C. lysogenic
D.lytic
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.
Which statements best describe gases? Check all that apply.
The atoms in a gas move at high speeds.
The atoms in a gas often get stuck
together.
The atoms in a gas spread in all directions.
Gases have a definite shape.
Gases have a definite volume.
The atoms in a gas move at high speeds.
The atoms in a gas spread in all directions.
What are gases?
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:
The atoms in a gas move at high speeds, traveling in straight lines and only changing direction when they collide with something, such as other gas atoms or the walls of their container.The atoms in a gas spread in all directions because they are in continuous motion and there are no significant forces keeping them together.Gases do not have a definite shape or a definite volume, they expand to fill the container they are in and can easily be compressed or expand based on external factors.Therefore, the statements that best describe gases are:
The atoms in a gas move at high speeds.The atoms in a gas spread in all directions.Gases have no definite shape.Gases have no definite volume.An object weighing 89.7g is placed in graduated cylinder displacing the volume from 50.0mL to 60.5 mL
Answer:The density of an object is 8.54 g/mL
Explanation:
If temperature is held constant for an ideal gas, as P and V change for a given gas sample, the PV of products will_____. increase decrease be constant change
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:
Which is an example of a free expansion of a gas?
the expansion of a gas due to a chemical reaction among its particles
the uncontrolled expansion of a gas into a vacuum
the expansion of a gas as it performs work on its container
the expansion of a gas as heat is transfered to it at constant pressure
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.
What is free expansion?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.
Which of the following statements is true in all cases?
A. Chemical bonds are broken in an exothermic reaction.
B. Chemical bonds are formed in an endothermic reaction
C. Energy is released in an endothermic reaction.
D. Energy is absorbed in an endothermic reaction.
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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The SI unit for energy is the Joule (J). Sam wants to convert 338.25 J into kJ.
Which operation should he choose?
He should multiply 338.25 by 10.
He should multiply 338.25 by 100.
He should divide 338.25 by 100.
He should divide 338.25 by 1000.
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.
What is energy?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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1. What is Boyle’s law?
• State the definition of the law in words.
• What are the assumptions of Boyle’s law?
• Write at least one mathematical equation that represents the law.
• What can be calculated with Boyle’s law?
• Using a gas-filled balloon as an example, describe what is happening to the gas molecules inside the balloon before and after you squeeze it.
Answer: Boyle's Law states if the temperature of gas remains the same, adding pressure will decrease the volume of the gas.
Explanation: The assumptions of Boyle's law basically states that if the temperature is constant, pressurizing the gas will cause a decrease in the overall volume of the gas.
The law can be represented with the following equation:
P1 x V1 = P2 x V2
Boyle's law can calculate the volume of a gas after it undergoes a pressure change. For example, if the volume of a gas is equal to 2.2 liters at a pressure of 1.3 atm, what happens to the volume of the gas if the pressure is decreased to 0.75 atm? You can determine that after plugging in the values into the equation.
1.3 atm x 2.2 L = 0.75 x V2
Next, multiply 1.3 atm by 2.2 L. Then, divide both sides of the equation by 0.75 to get 3.81, which can be rounded to 3.8. The answer is 3.8 L = V2.
So, this shows that when the pressure is decreased, the volume increases. The relationship between pressure and volume is inversely proportional, and the opposite would happen if the pressure was increased.
If you had a balloon, the gas molecules inside would be constantly in motion, and all spaced out. However, if the balloon was put under pressure, the molecules would become more closely packed together as the space decreased inside. So, according to Boyle's Law, the volume inside the balloon would decrease due to the pressure increasing if the temperature is constant.
Definition:
According to Boyle's law, the pressure of an ideal gas increases with a decrease in the volume of the container at a constant temperature.
Pressure is inversely proportional to volume.
Assumptions of Boyle's law:The assumptions made in the law are that the temperature and number of moles of gases or amount of gas within a closed system are constant.
Mathematical representation:PV = k
P is the pressure of the gas
V is the volume of the gas in the container
k is constant
What can be calculated with Boyle's law?We can calculate pressure and volume using Boyle's law.
The balloon is inflated with air, and as the air pressure presses on the rubber, the balloon expands. The balloon's unsqueezed portion will expand outward if one end is squeezed, reducing the volume and increasing pressure inside.
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Choose all that apply. When creating a graph, you should:
determine the x- and y- variables
label the scale on the x- and y- axes
plot the data points
draw a line of best fit to represent the data trend
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!
Which is the most likely reason why an aerosol can explodes when it is thrown into a fire?
Heated air particles flow from the atmosphere into the can.
The metal in the can expands due to the heat of the fire.
The particles in the can move more slowly until they join together.
Heat causes the gas particles in the can to move faster and farther apart.
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.
Which headings best complete the chart?
O X: Transparent Objects
Y: Opaque Objects
O X: Opaque Objects
| Y: Transparent Objects
O X: High Frequency Waves
Y: Low Frequency Waves
O X: Low Frequency Waves
Y: High Frequency Waves
Answer:B
Explanation:
The complete combustion of 1 mole of glucose in a living cell releases _____ the complete combustion of 1 mole of glucose by fire.
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.
How is temperature related to the physical change of a substance?
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:
edge 2023
Is the following chemical equation balanced?
AgNO3 + NaCl 4AgCl + NaNO3
yes
no
What is the hydrogen ion and hydroxide ion concentration for a pOH of 3.557? Is the solution an acid or a base?
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.
How can evidence from an experiment be explained in her relationship to the hypothesis?
A.as a prediction
B.as a question
C.as an in Inference
D.as a conclusion
Answer:
evidence from an experiment be explained in her relationship to the hypothesis as an inference
A piece of copper has a temperature of 75.6 0C. When the metal is placed in 100.0 grams of water at 19.1 0C, the temperature rises by 5.5 0C. What is the mass of the metal?
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.
Reduction is a reaction which results in a __1____ in electrons and a __2____ in positive charge of the atom or ion
1) a- loss
1) b- gain
2) a-increase
2) b-decrease
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
what type of electromagnetic waves does the human eye see as the colors red blue or green
A Visible light waves
B Radio waves
C infrared waves
D microwaves
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.
Ionic solids such as sodium chloride are easily shattered, but metallic solids such as copper can be easily bent and shaped. This difference occurs because _________.
A. ionic solids have low melting points
B. covalent bonding between sodium and chlorine keeps the solid rigid
C. mobile electrons in the copper can shift without disrupting the solid
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.
How can a mixture of salt water be separated into salt and water
A mixture of saltwater can be separated into salt and water through a process called "evaporation." Evaporation exploits the differences in boiling points between water and salt, allowing the components to be separated.
Here's how you can do it:
Start with the mixture of saltwater in a container. The salt is dissolved in the water.
Apply heat to the container. You can do this by placing the container on a stovetop or using an open flame. As the temperature rises, the water will begin to evaporate.
The water will change from its liquid state into water vapor (a gas) due to the heat. This water vapor will rise and leave the container, leaving behind the solid salt particles.
Continue heating until all the water has evaporated. The salt will be left behind in the container.
Once the evaporation process is complete, allow the container to cool. The salt will remain in its solid form, ready for use.
It's crucial to remember that this technique works best when separating dissolved salt from water. A alternative technique, such as filtering, would be needed if you want to separate salt from water in a solution where the salt has not yet dissolved (such as sand and seawater). The evaporation technique is straightforward, however it might not be effective for large-scale separation processes. In these circumstances, more sophisticated methods like distillation may be used.
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Final answer:
Salt and water can be separated through distillation, which uses their different boiling points, or through evaporation, which utilizes the sun's heat to leave behind salt crystals as water evaporates.
Explanation:
Separation of Salt and Water
To separate a mixture of salt and water, you can use physical methods such as distillation. Distillation exploits the difference in boiling points between the two substances. In this process, the saltwater is heated until the water boils and turns into vapor. The water vapor then condenses in a cooler part of the apparatus, often a condenser, and can be collected as pure water in a receiving flask. The salt, not having a vapor phase at the boiling point of water, remains in the original container.
Another method that can be used to separate salt from water, especially on a large scale, is evaporation. Large shallow ponds, often referred to as salt gardens, are used to expose saltwater to the heat of the sun. As the water evaporates, salt crystals are left behind, which can then be collected and further purified if necessary. These methods are practical, but the choice of method depends on the desired purity and the quantity of water and salt to be separated.
a white coloured salt silver chloride is placed in sunlight in a watch glass. state your observation. write a balanced chemical equation for this reaction. identify and define this type of reaction.
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
Titration reveals that 11.6 mL of 3.0M sulfuric acid are required to neutralize the sodium hydroxide in 25.00mL of NaOH solution. What is the molarity of the NaOH solution?
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.
2NaOH + H₂SO₄ —> Na₂SO₄ + 2H₂OFrom 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
Molarity of base, ([tex]M_{b}[/tex]) =?[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]
Cross multiply[tex]M_{b}[/tex] × 25 × 1 = 3 × 11.6 × 2
[tex]M_{b}[/tex] × 25 = 69.6
Divide both side by 25[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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Is steel ionic, covalent or metallic
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.
How do you calculate percentage yield? What is the definition of percentage yield?
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.
Explanation: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.
24g of magnesium reacts with 38 g of fluoride o produce __ g magnesium fluoride
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.
Explanation: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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The trend for ionization energy is a general increase from left to right across a period. However, magnesium (Mg) is found to have a higher first ionization energy value than aluminum (Al). Explain this exception to the general trend in terms of electron arrangements and attraction/repulsion
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:
Nuclear chargeAtomic radiusSublevel accomodating the electron to be removedSpecial stability of filled or half-filled sublevels.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 QUICKLY ASAP 10 POINTS
electromagnet can be made by wrapping wire around which object??
a glass bottle
an iron nail
a pencil
a rubber duck
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
Which phrase describes a scientific theory?
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.