Answer:
A
Explanation:
Quantum energy
Match Match the action to the effect on the equilibrium position for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g).
Match Term Definition
Removing ammonia A) Shift to the left
Removing hydrogen gas B) No effect
Adding a catalyst C) Shift to the right
In accordance with Le Chatelier's principle, the removal of a product will shift the equilibrium to the right, the removal of a reactant will shift the equilibrium to the left and adding a catalyst will have no effect on the equilibrium position.
Explanation:The principle being highlighted in this question is known as 'Le Chatelier's Principle', which states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium will shift to counteract the change.
Removing ammonia: When the concentration of a product (in this case, ammonia) is decreased, the equilibrium will shift towards the side of the products (or the right) to increase its amount again. Hence, removing ammonia will Shift to the right. Removing hydrogen gas: Hydrogen gas is a reactant. When the concentration of a reactant decreases, the equilibrium will shift towards the reactants side (or the left) to replenish its amount. Hence, removing hydrogen gas would Shift to the left. Adding a catalyst: A catalyst speeds up the rate of a reaction. However, it doesn't shift the equilibrium position, it just helps achieve it faster. So adding a catalyst would have No effect on the equilibrium position. Learn more about Le Chatelier's Principle here:
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Removing ammonia shifts the reaction to the right, removing hydrogen gas shifts it to the left, and adding a catalyst has no effect on the equilibrium position.
In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g):
Removing ammonia: This action reduces the concentration of the product (NH3), causing the reaction to shift to the right (toward products) to replace the removed NH3. Thus, removing ammonia results in a shift to the right.
Removing hydrogen gas: This action decreases the concentration of one of the reactants (H2), causing the reaction to shift to the left (toward reactants) to replenish the lost H2. Thus, removing hydrogen gas results in a shift to the left.
Adding a catalyst: A catalyst speeds up the rate of both the forward and reverse reactions equally and does not affect the position of the equilibrium. Thus, adding a catalyst results in no effect on equilibrium position.
NEED HELP!!!!!!!!!!!!!!!!!!!
Select the choice that best completes the following sentence.
Simple machines
A.
are tools that make work easier.
B.
reduce the amount of energy needed to do work.
C.
are made up of multiple moving parts.
D.
cannot be combined to make compound machines.
The answer is A. are tools that make work easier
Which of the following equations expresses the work-kinetic energy theorem?
Answer:
W = ΔKE = 1/2mv₂⁽²⁾ - 1/2mv₁⁽²⁾
Explanation:
Work means Change In Kinetic Energy.
Kinetic-Energy is equal to change in velocity multiplied by mass and divided by 2
∴ KE = 1/2m²
Change in Kinetic-Energy =KE₂ - KE₁
=1/2mv₂⁽²⁾ - 1/2mv₁⁽²⁾
The work-kinetic energy theorem is expressed by the equation: [tex]\[ W_{\text{net}} = \Delta KE \][/tex]. So, the correct option is: d) [tex]\( W_{\text{net}} = \Delta KE \)[/tex].
The work-kinetic energy theorem states that the net work done on an object is equal to the change in its kinetic energy. Mathematically, it is expressed as [tex]\(W_{\text{net}} = \Delta KE\)[/tex]. Here, [tex]\(W_{\text{net}}\)[/tex] represents the net work done on the object, and [tex]\(\Delta KE\)[/tex] is the change in kinetic energy.
This theorem is fundamental in understanding the relationship between the work done on an object and the resulting change in its motion.
When a net force is applied to an object, it performs work, transferring energy to or from the object. This work leads to a change in the object's kinetic energy, which is associated with its motion. If the net work is positive, the kinetic energy increases, implying an acceleration or an increase in speed.
Conversely, if the net work is negative, the kinetic energy decreases, resulting in deceleration or a decrease in speed. The work-kinetic energy theorem provides a crucial link between the concepts of work and energy in the dynamics of moving objects.
Complete Question:
Which of the following equations expresses the work-kinetic energy theorem?
a) [tex]$\mathrm{ME}_{\mathrm{i}}=\mathrm{ME}_{\mathrm{f}}$[/tex]
c) [tex]$\triangle W=K E$[/tex]
b) [tex]$W_{\text {net }}=P E$[/tex]
d) [tex]$W_{\text {net }}=\Delta K E$[/tex]
What are points a and b? What does this diagram show? Whats point c?
a is Cation
b is delocalised electrons
This diagram is a representation of physical property in metal called Malleable
c is the electrostatic force
How many grams of sucrose (C12H22O11) would be in 8.7 L of a 6.81M solution of sucrose
- please explain if able
= 20,280.25 g or 20.28 Kg
Explanation;Number of moles, n = Molarity × Volume
Molarity = 6.81 M
Volume = 8.7 L
Number of moles = 6.81 × 8.7
= 59.247 moles
Mass = Moles × Molar mass
= 59.247 × 34.2 g/mol
= 20,280.25 or
= 20.28 Kg
Rhizobium:
are nitrogen-fixing bacteria
live in the nodules of legumes
convert nitrogen in soil into nitrogen compounds
all of the above
Rhizobium: are nitrogen-fixing bacteria that live in the nodules of legumes which convert nitrogen in soil into nitrogen compounds. so the answer is all the above i hope this helps
Answer:
All of the above
Explanation:
Rhizobium is an important diazotrophic bacteria in nitrogen cycle. They are involved in a symbiotic relationship with leguminous plants; they assist in nitrogen fixation in the roots of these plant by taking up nitrogen from the atmosphere and passing it into the plants (in the form of ammonia or amino acids) which allows the plant to grow in soil with low nitrogen. The plant in exchange provide organic acids for the bacteria which it uses for carbon and energy source.
From the above, we can deduce that
(a) rhizobium are nitrogen fixing bacteria
(b) they live in the nodules of legumes (hence the symbiotic relationship)
(c) convert nitrogen in soil into nitrogen compounds like ammonia or amino acids
hence, the correct option is all of the above
Private land is generally used for _______. a. homes b. businesses c. factories d. all of the above Please select the best answer from the choices provided A B C D
HM, I think the answer would be D. This is just a guess, so please use it if ou want to answer D it's ok :D
Answer: d. all of the above
Explanation:
Private land is the land which is legally occupied by a single ownership. The government has no right over it. The single owner can use the land for the purpose of self benefit. A private land owner can use the land for the purpose of construction of homes, factories and use the land for the commercial businesses like fishing, farming and for other needs.
On the basis of the above explanation, d. all of the above is the correct option.
How many molecules are there in 223 grams of Na2SO4?
= 9.45 × 10^23 molecules
Explanation;The molar mass of Na2SO4 = 142.04 g/mol
Number of moles = mass/molar mass
= 223/142.04
= 1.57 moles
But;
1 mole = 6.02 × 10^23 molecules
Therefore;
1.57 moles = ?
= 1.57 × 6.02 × 10^23 molecules
= 9.45 × 10^23 molecules
Which is the next logical step in balancing the given equation?
N2 + O2 → NO2
A. Place the coefficient 2 in front of oxygen and nitrogen dioxide.
B. Place the coefficient 3 in front of oxygen and nitrogen dioxide.
C. The equation is already balanced.
D. Change the subscript of the nitrogen molecule to 1.
To balance the given equation, we apply elemental balance and count each elements per side. There are 2 nitrogens in the left side so there should be 2 moles of NO2. Since there are already 4 moles of O in the right side, there should be 2 moles of O2. Hence answer is a. Place the coefficient 2 in front of oxygen and nitrogen dioxide.
Answer:
A. Place the coefficient 2 in front of oxygen and nitrogen dioxide.
Explanation:
Balancing equations is a consequence of the law
of conservation of mass, according to this law, the mass of the reactants must be equal to the mass of the products, this means that the quantity of the atoms found in the reactants must be equal to the quantity of the products In this case, for the equation to be balanced, a coefficient of 2 must be added to oxygen and nitrogen dioxide.
what is potential energy that depends on height is called what?
Gravitational potential energy is due to the position of an object above Earth's surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height
Gravitational potential energy is the energy an object possesses due to its position above the ground, calculated with the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height.
Explanation:The type of potential energy that depends on height is called gravitational potential energy. When an object is raised against the pull of gravity, work is performed, resulting in an increase in potential energy. This energy is calculated using the formula PE = mgh, where m is the mass, g is the acceleration due to gravity, and h is the height the object is raised. For example, if you lift a car to the top of a parking garage, you are increasing its gravitational potential energy regardless of how the car is moved there.
Considering an object's potential energy available when a body of water is trapped behind a dam, it can be computed similarly. The gravitational potential energy is half the product of the mass, acceleration due to gravity, and the average height (mgh/2), since the height of the water smoothly transitions from h to zero as it drains out. Volume is the product of the area A of the captured water surface and the initial water height h, and the mass is the product of the density p and the volume.
In essence, objects have potential energy due to their position relative to other objects with mass, and the gravitational force provides a way to release this energy, as seen when an object is allowed to fall back to the ground, converting potential energy to kinetic energy.
Which image(s) would be considered pure substances? A) V B) I and II C) II and IV D) III and V
V is the answer for this question
A pure substance is a form of matter with constant composition and properties. Examples include elements and compounds, each with fixed physical and chemical properties and cannot be separated by physical methods.
Explanation:Without the context of visual imagery in the question, it is difficult to provide a precise answer to which image(s) represent pure substances. However, I can explain what a pure substance is. A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Examples of pure substances include elements like iron or copper, and compounds like water or sodium chloride. Pure substances have fixed physical and chemical properties like boiling point, melting point, and density. The special characteristic of pure substances in Chemistry is that they cannot be separated into other kinds of matter by physical methods.
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Which of the following is likely to occur if more reactants are added to a reaction that is at chemical equilibrium?
There will be no effect; the reaction will stay at equilibrium
The reaction will shift to the right (toward the products)
The reaction will shift to the left (toward the reactants)
The reaction will shift to the right (toward the products)
Explanation;Le Chatelier's principle states that changing a factor such as concentration, temperature, or pressure of a reaction at equilibrium will cause the reaction to shift in the direction that counteracts the effect of that change.Therefore, when more reactants are added to a reaction at equilibrium shift the reaction shifts to the right to make more products.Answer:
The reaction will shift to the right (toward the products)
Explanation:
Which term refers to the speed at which reactants are converted into products?
Answer:
Reaction Rate
Explanation:
It means change in concentration of reactants or change in concentration of products per unit time.
Answer:
Reaction rate refers to the speed at which reactants are converted into products.
Explanation:
The complete question is:
"Which term refers to the speed at which reactants are converted into products?
A) reaction rate
B) activation energy
C) meta stable state
D) spontaneous reaction"
In a chemical process, substances called reactants are transformed into products as time passes. The reaction rate is defined as the change in the concentration of one of the reagents or products, in a time interval in which the change takes place. In other words, the speed of a chemical reaction is the speed with which products are formed (or with which reagents disappear).
Chemical kinetics is the area within physical chemistry that is responsible for studying the speed of a reaction, the factors that affect the speed of the reaction, and the mechanism that follows the reaction.
Reaction rate refers to the speed at which reactants are converted into products.
Which of the following could you do to increase the strength of an electromagnet?
Change the core from wood to iron. This is because iron is a magnetic material while wood is not magnetic hence cant acquire magnetism. Other factors that would increase the strength of electromagnet would be; increasing the amount of electric current, and increasing the number of winding's.
Completion
Complete each statement.
Select the correct term to complete each sentence. There are extra terms in the list.
Coriolis effect El Niño Southern Oscillation
sea breeze thermal
land breeze hurricane
air mass tornado
wind jet stream
8. A __________________________ is created when warm air over the land rises and creates low pressure.
9. A __________________________ occurs when warmer air over the sea rises and creates low pressure.
10. The bending of air and water currents as a result of Earth’s rotation is known as the
_________________________.
11. A rising column of warm air that gliding birds and sailplanes ride is known as a _______________.
12. A large body of air with consistent temperature and moisture throughout is known as an
________________________.
13. The flow of air that occurs as a result of a pressure or temperature difference between two air masses is called
____________________.
14. A system of rotating winds around a low pressure center that has a small diameter and very high wind speeds
is called a ____________________.
15. The change in wind flow, air pressure, and thunderstorm activity in the Pacific Ocean that causes decreased
fish catches by Peruvian fishermen is known as ______________________________.
PLEASE HELP
These are the answers to the incomplete statements:
8) A land breeze is created when warm air over the land rises and creates low pressure.9) A sea breeze occurs when warmer air over the sea rises and creates low pressure.10) The bending of air and water currents as a result of Earth’s rotation is known as the Coriolis effect.11) A rising column of warm air that gliding birds and sailplanes ride is known as a thermal.12) A large body of air with consistent temperature and moisture throughout is known as an air mass.13) The flow of air that occurs as a result of a pressure or temperature difference between two air masses is called wind.14) A system of rotating winds around a low pressure center that has a small diameter and very high wind speeds is called a hurricane.15) The change in wind flow, air pressure, and thunderstorm activity in the Pacific Ocean that causes decreased fish catches by Peruvian fishermen is known as El Niño–Southern Oscillation (ENSO).What are these terms about?Land breeze: A land breeze is a wind that blows from land to sea during the night. This is because the land cools down faster than the sea at night, so the air over the land becomes denser and sinks, creating a low-pressure area. The air over the sea is warmer and less dense, so it rises to fill the low-pressure area, creating a wind that blows from land to sea.
Sea breeze: A sea breeze is a wind that blows from sea to land during the day. This is because the sea heats up faster than the land during the day, so the air over the sea becomes less dense and rises, creating a low-pressure area. The air over the land is cooler and denser, so it sinks to fill the low-pressure area, creating a wind that blows from sea to land.
Coriolis effect: The Coriolis effect is a phenomenon that causes moving objects on a rotating Earth to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This is because the Earth's rotation causes a force to act on moving objects, which deflects them to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
Thermal: A thermal is a rising column of warm air that is created when the sun heats the ground. The warm air rises because it is less dense than the surrounding air. Gliding birds and sailplanes can ride thermals to gain altitude.
Air mass: An air mass is a large body of air with consistent temperature and moisture throughout. Air masses are formed over large areas of land or sea, and they can travel long distances.
Wind: Wind is the flow of air that occurs as a result of a pressure or temperature difference between two air masses. Wind can be caused by the uneven heating of the Earth's surface, by the rotation of the Earth, or by differences in air pressure.
Hurricane: A hurricane is a large, rotating storm that forms over warm tropical oceans. Hurricanes are characterized by strong winds, heavy rain, and high waves. Hurricanes can cause extensive damage to coastal areas.
El Niño–Southern Oscillation (ENSO): El Niño–Southern Oscillation (ENSO) is a climate pattern that occurs in the Pacific Ocean. ENSO is characterized by changes in the ocean temperature and wind patterns, which can have a significant impact on weather patterns around the world. El Niño is a warm phase of ENSO, while La Niña is a cold phase of ENSO.
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when 3.18 mole of chlorine reacts with excess aluminum, how many mole of aluminum chloride are formed
The solution is included. If you wonder, n(x) means the number of moles of the substance x.
When 3.18 mole of chlorine reacts with excess aluminum, 2.12 mole of aluminum chloride are formed.
The question pertains to the stoichiometry of the reaction between aluminum (Al) and chlorine (Cl₂) to form aluminum chloride (AlCl₃). According to the balanced chemical equation, 2 Al (s) + 3 Cl₂ (g) → 2 AlCl₃ (s), it indicates that 3 moles of chlorine gas react with 2 moles of aluminum to produce 2 moles of aluminum chloride. Given that 3.18 moles of chlorine reacts with excess aluminum, it means we have more than enough aluminum to react with the provided chlorine. Therefore, leveraging the stoichiometric relationship from the balanced equation where 3 moles of Cl₂ yield 2 moles of AlCl₃, if we have 3.18 moles of Cl₂, we can calculate the moles of AlCl3 produced as follows: (2 moles AlCl₃ / 3 moles Cl₂) * 3.18 moles Cl₂ = 2.12 moles of AlCl₃.
According to the kinetic theory, what is the kinetic energy of a gas molecule proportional to? A. volume of the gas B. pressure of the gas C. temperature of the gas D. density of the gas
D. density of the gas
Answer: C. temperature of the gas
Explanation:
The kinetic theory says that the kinetic energy of the gas molecules (directly related to "how much" the molecules are moving inside the gas) is directly related to the internal energy of the gas, which is related to the temperature.
This relation can be written, in the kinetic theory, as:
(1/2)m*v^2 = (1/2)*Kb*T
where Kb is a constant, and the therm in the left is the kinetic energy, so here we can see that the kinetic energy is proportional to the temperature, where (1/2)*Kb is the constant of proportionality
Which of the following units is best when measuring the length of an object?
The unit for measuring length should be chosen based on the size of the object. Small objects are suited to millimeters or centimeters, while large objects may require meters or kilometers. Units like inches, feet, centimeters, or meters are best for everyday objects.
Explanation:The best unit for measuring the length of an object depends largely on the size of that object. For very small objects, units like millimeters or centimeters are often most suitable. For larger objects, meters or kilometers might be ideal. For objects of a size common to everyday experiences, like the length of a book or the height of a desk, inches or feet (in countries where the imperial system is used), or centimeters or meters (in countries where the metric system is used), may be the best choices. The choice of units should make the measurement easy to understand and compare with similar objects.
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_______ accounts for most of a cell's mass.
A. Water
B. Food
C. Carbon dioxide
D. Chlorophyll
The answer is
A. water
A. Water
hope this helps
What happens to an acid that causes the formation of a polyatomic ion
When the hydrogen ions (H⁺) from the acid react with the hydroxide ions (OH⁻) from the base. The acid and base neutralize each other. The other ions from both dissolve. When the extra ions dissolved in water from its making evaporate and the ions join to form the compound know as salt.
An acid which causes the formation of a polyatomic ion undergoes dissociation to form hydrogen ions and anions.
What is an acid?
Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.
According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic acids depending on the number of protons which are liberated on dissociation.
Acids are widely used in industries for production of fertilizers, detergents batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.
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Convert 23.92inHg to Torr.
= 607.568 Torr
Explanation;1 in of mercury is equivalent to 25.4 Torr
Therefore;
23.92 InHg will be equal to;
23.92 × 25.4
= 607.568 Torr
What experiment did Robert Millikan do
I think this is the answer but he did the oil drop experiment, i hope this helps
Answer:
he used voltage adjustments to make charged oil drops float.
Explanation:
just did it on apex
Coefficients in a chemical formula provide
Answer:
The relative number of products and reactants
Explanation:
The numerical coefficients in chemical equations show the ratio of the molecules of each substance involved in a chemical reaction that is both reactants and products. The coefficients in a balanced chemical equation indicate the relative number of moles of reactants and products.Additionally, coefficients are important to prove the law of conservation of mass.In Chemistry, the coefficients in a chemical formula represent the number of molecules involved in a chemical reaction. These coefficients provide a quantitative relationship between the reactants and products of a reaction, which is part of a concept called stoichiometry.
Explanation:In a chemical formula, coefficients provide a quantitative assessment of the relationships between the amounts of substances consumed and produced by a reaction. They allow the representation of the relative numbers of different entities or chemical species involved in the reaction. This is a part of a concept called stoichiometry, derived from the Greek words stoicheion (meaning “element") and metron (meaning "measure”).
An example of this can be seen in a balanced chemical equation. Coefficients from the equation are used to derive stoichiometric factors that subsequently may be used for computations relating reactant and product masses, molar amounts, and other quantitative properties. In simpler terms, a chemical equation is a symbolic representation of a chemical reaction, and the coefficient signals the number of molecules involved in that reaction.
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What is the polymer used in making car rear lights?
A. Perspex
B. Bakelite
C. Polystyrene
D. Polyacrylonitrite
D. Polyacrylonitrite
hope i help my bad if i'm wrong
Which choice best describes the specific heat of water compared with that of metals?
A. The specific heat of water is less than the specific heat of metals.
B. The specific heat of water is about the same as the specific heat of metals.
C. The specific heat of water is greater than the specific heat of metals.
D. The specific heat cannot be measured for water.
Answer: Specific heat capacity is the measurement of how much energy (in J) has to be added to 1 kg of a substance to increase the temperature of that substance by 1 o C. Simply, substances with a low specific heat capacity heat up quickly - but then they lose their heat quickly. Substances with a high specific heat capacity require a large amount of heat to be added to change their temperature - but then they hold their heat much longer.
Explanation: Think of heating a pot of soup on the stove and stirring it with a metal spoon. If you leave the spoon sitting in the pot for even a few minutes and you return, the spoon will be hot enough to burn your hands - and the soup will feel only slightly warmer. This happens because the specific heat capacity of the metal spoon is much lower than that of the water in the soup. Water has the highest specific heat capacity of any liquid.
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The specific heat of water is greater than the specific heat of metals, which means water requires more energy to change its temperature than metals.
Explanation:The best choice to describe the specific heat of water compared to that of metals is option C. The specific heat of water is greater than the specific heat of metals. This means water requires more heat energy to change its temperature compared to metals. For example, if we have equal masses of water and metal and apply the same amount of heat, the temperature of the metal will increase more quickly than that of the water because water has higher specific heat.
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what impacts or effects climate?
The potential future effects of global climate change include more frequent wildfires, longer periods of drought in some regions and an increase in the number, duration and intensity of tropical storms.
Climate change has long been a myth of the left to trick you into following there crazy policies, "climate change" has been happening for 30,000 years. The great lakes used to be glaciers, now there lakes. Climate change is not man made. O2 has been in the atmosphere for thousands of years aswell, not only that, but we need O2 for plants. To answer your question, you should stand up to your teacher and give them the facts.
What is the correct name for CH4?
A)Carbon tetrahydride
B)Carbon (IV) hydride
C)Monocarbon tetrahydride
D)Monocarbon hydroxide
A)Carbon tetrahydride
Explanation;Carbon tetrahydride has the formula CH4. This is because the name begins with carbon (which has the symbol C) and it does not have a numerical prefix (such as di, tri, etc.).If there is no prefix for the first element, it is implied that there is one of that atom. The second part of the name has tetra, which means 4. Hydride is for the element hydrogen, which has the symbol H.Answer:
Carbon tetrahydride is the answer
Explanation:
The suns mass is very small compared to earth true or false
Explain how to determine the average atomic mass from knowing the percent abundance of isotopes
The chlorine isotope with 18 neutrons has an abundance of 0.7577 and a mass number of 35 amu. To calculate the average atomic mass, multiply the fraction by the mass number for each isotope, then add them together.
To calculate the average atomic mass of an element from percent abundances, convert the abundances to decimals, multiply each decimal by the atomic mass of the corresponding isotope, and sum the products.
Explanation:The average atomic mass of an element can be calculated using the percent abundances of its isotopes. To do this, convert the percent abundances into decimal form by dividing by 100. Then, multiply each decimal abundance by the respective isotope's atomic mass. Finally, add the products together to get the average atomic mass of the element.
In the ideal gas law, n represents___.
In an ideal gas law, n represents number of gas molecules in given amount of gas at constant pressure with constant temperature.
Final answer:
In the ideal gas law, the variable 'n' represents the number of moles of a gas, which is essential in calculating the state of an ideal gas along with pressure, volume, and temperature.
Explanation:
In the ideal gas law, represented by the equation PV = nRT, the variable n stands for the number of moles of a gas. The ideal gas law restates the various individual gas laws into a single unified equation, which allows for the calculation of the state of an ideal gas when the pressure (P), volume (V), temperature (T), and number of moles (n) are known. The universal gas constant (R) relates these quantities and is a product of Avogadro's number (NA) and the Boltzmann constant (k).