Answer:
D is the answer
Explanation:
I'm pretty sure a molecular compound doesn't form between 2 non metals
...I think, but I can't remember
The incorrect statement is that in an ionic compound, a metal and a polyatomic ion form a compound, and electrons are shared. In ionic compounds, electrons are transferred, not shared, resulting in the formation of cations and anions.
Explanation:The statement that is NOT correct is: b) In an ionic compound, a metal and a polyatomic ion form a compound, and electrons are shared. This statement is incorrect because in an ionic compound, electrons are not shared but are transferred from the metal to the non-metal or to the polyatomic ion, forming cations and anions.
In ionic compounds, metals lose valence electrons to form positively charged ions, while nonmetals gain those electrons to form negatively charged ions, both achieving a full outer shell as per the octet rule. Covalent compounds, on the other hand, form when non-metals share electrons, producing molecular compounds.
Therefore, the correct statements are:
a) In an ionic compound, a metal and a non-metal form a compound, and electrons are transferred from one to the other.
c) In both ionic and molecular compounds, valence electrons take part in bonding.
d) In a molecular compound, a non-metal and a non-metal form a compound, and electrons are shared.
A gas has a volume of 3 L at a temperature of 78 c.Find the volume of the gas at standard temperature
Answer:
The answer to your question is V2 = 2.5 l
Explanation:
Data
Volume 1 = V1 = 3 l
Temperature 1 = T1 = 78°C
Volume 2 = V2 = ?
Temperature 2 = T2 = 20°C Standard temperature = 20°C
Process
To solve this problem use Charles' law
V1/T1 = V2/T2
-Solve for V2
V2 = V1T2 / T1
1.- Convert the temperature to °K
T1 = 78 + 273 = 352°K
T2 = 20 + 273 = 293°K
2.- Substitution
V2 = (3 x 293) / 352
3.- Simplification
V2 = 879/352
4.- Result
V2 = 2.5 l
A sample of gas is held at 100oc at a volume of 20 L.if the volume is increased to 40 L what is the new temperature of the gas in celcius.
Answer:
The new temperature of the gas is 200 Celsius degrees.
Explanation:
Charles's Law consists of the relationship between the volume and temperature of a certain amount of ideal gas, which is maintained at a constant pressure, by means of a proportionality constant that is applied directly.
In this way, Charles's law is a law that says that the quotient that exists between volume and temperature will always have the same value:
[tex]\frac{V}{T} =k[/tex]
Assuming you have a certain volume of gas V1 that is at a temperature T1 at the beginning of the experiment, if you vary the volume of gas to a new value V2, then the temperature will change to T2, and it will hold:
[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]
In this case:
V1= 20 LT1= 100 °CV2= 40 LT2= ?Replacing:
[tex]\frac{20}{100} =\frac{40}{T2}[/tex]
Solving:
[tex]T2=\frac{40}{\frac{20}{100} }[/tex]
T2=200 °C
The new temperature of the gas is 200 Celsius degrees.
Answer:
473°C
Explanation:
We'll begin by analysing what was given from the question. This is illustrated below:
Initial temperature (T1) = 100°C
Initial volume (V1) = 20 L
Final volume (V2) = 40 L
Final temperature (T2) =?
Next, we shall be converting the temperature in celsius to Kelvin temperature. This is illustrated below:
Temperature (Kelvin) = temperature (celsius) + 273
Initial temperature (T1) = 100°C = 100°C + 273 = 373K
Next, we shall obtain the new temperature by applying the Charles' law equation. This is illustrated below:
V1/T1 = V2/T2
20/373 = 40/T2
Cross multiply to express in linear form
20 x T2 = 373 x 40
Divide both side by 20
T2 = (373 x 40) /20
T2 = 746K
Next, we shall be converting the new temperature obtained from Kelvin to celsius temperature. This is illustrated below:
Temperature (celsius) = Temperature (Kelvin) - 273
Temperature (celsius) = 746K - 273
Temperature (celsius) = 473°C
A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change?
Answer:
a
Explanation:
0.75
Answer:
the answer is a
Explanation:
Which describes isotopes? Check all that apply.
Final answer:
Isotopes are versions of an element with the same number of protons but different numbers of neutrons, such as carbon-12 and carbon-14. To find the number of protons, neutrons, and electrons in an atom, you need the atomic number and mass number. Radioactive isotopes decay to more stable forms, releasing particles and energy.
Explanation:
Isotopes are different forms of an element that have the same number of protons but a different number of neutrons. For example, whereas carbon-12 has six protons and six neutrons, carbon-14 has six protons and eight neutrons. Both isotopes of carbon have six electrons since the number of electrons is defined by the number of protons to maintain a neutral charge. Radioactive isotopes, or radioisotopes, may emit particles and energy, transforming into more stable forms and losing potential energy in the process.
To determine the number of protons, neutrons, and electrons in an atom with a given mass number, you first need to know the element's atomic number (number of protons) and mass number. The atomic number is equal to the number of protons and electrons (in a neutral atom). The number of neutrons can be found by subtracting the atomic number from the atomic mass number. For instance, carbon-14, with an atomic number of 6 and a mass number of 14, has 6 protons, 8 neutrons (14 - 6), and 6 electrons.
How might a lack of sunlight disrupt the food web?
Producers would die, and if producers died, consumers would die too. ... food chains show energy being transferred and food webs show organisms linked to each other.
What is the pH of a 6.7 x 10^−5 M H+ solution?
Answer:
pH = 4.17
Explanation:
According to the molar concentration you stated, pH of the solution is: 4.17
Remember that pH = - log [H⁺]
and [H⁺] = 10^-pH
When:
pH > 7 → Basic solution
pH = 7 → Neutral solution
pH < 7 → Acid solution
A mixture of sand and salt containig MgCl2 (100.0 g) is sprinkled on a section of pavement. The total estimated ice on the pavement is 10.0 kg. What is the freezing point of the ice (°C)? MM MgCl2 = 95.211 g/mol MM ice = 18.0148 g/mol
Answer:
-0.6⁰c
Explanation:
find the solution below
An aqueous solution of methylamine (ch3nh2) has a ph of 10.68. how many grams of methylamine are there in 100.0 ml of the solution?
There are approximately 0.0105 grams of methylamine in 100.0 mL of the solution.
To solve this problem, we need to follow these steps:
**1. Calculate the hydroxide ion concentration:**
* pH = 10.68
* pOH = 14 - pH = 3.32
* [OH-] = 10^(-pOH) = 10^(-3.32) = 4.74 x 10^-4 M
**2. Calculate the Kb of methylamine:**
* Ka = 2.5 x 10^-11 (pKa = 10.60)
* Since methylamine is a weak base, Kb = 1/Ka = 4.0 x 10^-4
* Kb = [CH3NH3+][OH-] / [CH3NH2]
**3. Express the concentration of CH3NH2 in terms of the remaining concentration:**
* Let x be the initial concentration of CH3NH2 (in M).
* At equilibrium, some CH3NH2 will react with water, forming CH3NH3+ and OH-.
* The remaining concentration of CH3NH2 will be x - [OH-].
**4. Substitute concentrations and solve for x:**
* Kb = [CH3NH3+][OH-] / [CH3NH2]
* Kb = ((x - [OH-]) * [OH-]) / (x - [OH-])
* 4.0 x 10^-4 = (x * 4.74 x 10^-4) / (x - 4.74 x 10^-4)
* Solving this equation for x gives x = 0.0034 M
**5. Calculate the moles and grams of methylamine:**
* Moles of CH3NH2 = (0.0034 M) * (0.1 L) = 0.00034 mol
* Molar mass of CH3NH2 = 31.05 g/mol
* Mass of CH3NH2 = (0.00034 mol) * (31.05 g/mol) = 0.0105 g
Therefore, there are approximately 0.0105 grams of methylamine in 100.0 mL of the solution.
which of the following will end it’s life cycle as a black hole
Answer:hope we can be friends
can i please get brainliest
Imagine an enormous cloud of gas and dust many light-years across. Gravity, as it always does, tries to pull the materials together. A few grains of dust collect a few more, then a few more, then more still. Eventually, enough gas and dust has been collected into a giant ball that, at the center of the ball, the temperature (from all the gas and dust bumping into each other under the great pressure of the surrounding material) reaches 15 million degrees or so. A wondrous event occurs.... nuclear fusion begins and the ball of gas and dust starts to glow. A new star has begun its life in our Universe. So what is this magical thing called "nuclear fusion" and why does it start happening inside the ball of gas and dust? It happens like this..... As the contraction of the gas and dust progresses and the temperature reaches 15 million degrees or so, the pressure at the center of the ball becomes enormous. The electrons are stripped off of their parent atoms, creating a plasma. The contraction continues and the nuclei in the plasma start moving faster and faster. Eventually, they approach each other so fast that they overcome the electrical repulsion that exists between their protons. The nuclei crash into each other so hard that they stick together, or fuse. In doing so, they give off a great deal of energy. This energy from fusion pours out from the core, setting up an outward pressure in the gas around it that balances the inward pull of gravity.
Explanation:
Two-thirds of the sulfur dioxide that pollutes the air is produced by
Answer:
Power plants.
Explanation:
When power plants start the burning coal process, the chemical bonds carrying its carbon atoms are brake down and releasing energy also carrying heavy metals such as lead, mercury, and cadmium into the atmosphere.
When the sulfur which is present in coal reacts with oxygen it produces sulfur dioxide and they the ability to combines with other lethal toxic molecules that are found in the atmosphere and form small, acidic particulates that can cause several diseases in humans.
How is the way that a wind turbine works similar to the way that a hydroelectric plant works? How is it different?
Answer: (Hydroelectric plant) gravity pushes water down pipes or canals at high pressure which forces the turbine to turn and generate electricity. In wind power (wind turbines), wind spins the turbine blades, which in turn, spins the magnet.
Explanation:
Final answer:
Wind turbines and hydroelectric plants both convert kinetic energy into electrical energy using turbines and generators. The energy source for wind turbines is moving air, whereas for hydroelectric plants it's the potential energy of water. They differ in the method of capturing and converting this energy into mechanical motion.
Explanation:
The way that a wind turbine works is similar to the way that a hydroelectric plant works in that both convert kinetic energy into electrical energy using turbines and generators. In a hydroelectric plant, water flows from a reservoir, gains kinetic energy, hits the turbine blades, and turns a shaft connected to a generator. The movement of the water thus generates electricity. Similarly, a wind turbine captures kinetic energy from the movement of air. Wind causes the rotor blades to lift and rotate, which turns a shaft also connected to a generator, producing electricity.
However, there are key differences between these two systems. The source of kinetic energy for hydroelectric plants is the potential energy of water due to gravity, while wind turbines rely on the kinetic energy of moving air, driven by solar energy and temperature differences. The methods used to convert this energy into mechanical motion of the turbines also vary, with the wind pushing against turbine blades directly and water being channeled through turbines in a more controlled environment.
In summary, both wind turbines and hydroelectric plants utilize turbines and generators to produce electricity, but the source of their energy and the specifics of their operation differ significantly.
Which factors have the greatest effect on the rate of a chemical reaction between agno3 and cu
Answer:
Surface area of the reactants
Explanation:
If the reactants say Cu is in the powdered form, it reacts very quickly, otherwise the reaction will be delayed
Answer:
Surface Area and concentration
Explanation:
One of the most important factors that affect the rate of chemical reaction is the surface area of reactants. Surface area of reactants has to do with the number of particles of reactants exposed for reaction. In the reaction;
2AgNO3(aq) + Cu(s) -------> Cu(NO3)2(aq) + 2Ag(s), the most important factors affecting the rate of reaction are surface area of the solid copper metal and the concentration of the silver nitrate solution.
If copper turnings are used, the reaction will proceed faster than when a lump of copper is used. This is the effect of surface area in rate of reaction.
The higher the concentration of the solve nitrate solution, the faster the rate of reaction also. Hence the answer.
The volume of a gas is 10.O liters and it’s temperature is 1500 k if the temperature is decreased to 750 k what’s the new volume
Using Charles's Law, which states that the volume of a gas is directly proportional to its temperature in Kelvin with constant pressure, the new volume of gas when temperature is decreased from 1500 K to 750 K is 5.0 liters.
This question is related to the Charles's Law, which states that the volume of a gas is directly proportional to its temperature in Kelvin, assuming that the pressure and the amount of gas remain constant. To solve this problem, we can use the formula V₁/T₁= V₂/T₂ , where V₁ and V₂ are the initial and final volumes, and T₁ and T₂ are the initial and final temperatures in Kelvin, respectively.
Given: V₁ = 10.0 liters, T₁ = 1500 K, T₂ = 750 K
We are solving for V₂.
Using Charles's Law:
V₁/T₁= V₂/T₂
(10.0 L) / (1500 K) = V2 / (750 K)
V₂ = (10.0 L) / 2
V₂= 5.0 liters
The correct answer is that the new volume of the gas when the temperature is decreased to 750 K is 5.0 liters.
someone help please!
Answer:
your answer is either c or d but probably c
What is the source of heat for the Earth? *
ozone
wind
sun
water
Answer:
plz mark as brainliest
Explanation:
OZONE
Earth keeps a nearly steady temperature, because it makes heat in its interior. In other words, Earth has been losing heat since it formed, billions of years ago. But it’s producing almost as much heat as it’s losing. The process by which Earth makes heat is called radioactive decay.
Reaccionan 54gr de Nitrato de plata al 39 % de pureza, con 72gr de ácido clorhídrico al 83% de pureza, en un proceso donde se obtienen 93 gr de cloruro de plata. El otro producto es el ácido nítrico: Calcular el porcentaje de rendimiento de la reacción y balancear
Answer:
what is the English translation, id like to help
Explanation:
Fe2o3 + 3C —> 2Fe +3CO
Name the first reactant:
How many total atoms on the reactant side:
How many total atoms on the product side:
Answer:
1. iron(III) oxide
2. 8
3. 8
Explanation:
Know the naming rules
Reactants on left side products on right side
The first reactant is Fe2O3, with 5 total atoms on both sides.
Explanation:The first reactant in the equation Fe2O3 + 3C —> 2Fe + 3CO is Fe2O3, which represents iron(III) oxide.
On the reactant side, there are a total of 5 atoms (2 Fe atoms and 3 O atoms from Fe2O3, and 3 C atoms).
On the product side, there are a total of 5 atoms (2 Fe atoms from 2Fe and 3 C atoms from 3CO).
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What is white light?
Answer:
A white light is apparently colourless light, for example ordinary daylight. It contains all the wavelengths of the visible spectrum at equal intensity.
Answer:
White Light is a light having a mixture of frequencies, being perceived as having no specific colour; such as sunlight.
Explanation:
which is not an example of a vestigial structure
Answer:
the femur
Explanation:
a vestigial structure is useless, and a femur bone is not uselsess
Answer:
Pelvic bone of a snake
Explanation:
Photochemical smog is formed when primary pollutants interact with
Answer: Sunlight.
Explanation:
Photochemical smog is formed when primary pollutants such nitrogen oxides and volatile organic compound (VOC) react with sunlight, forming a brown haze above cities.
Photochemical smog can only occur during the day.
Photochemical smog is formed when primary pollutants such as nitrogen oxides and volatile organic compounds interact with sunlight. The reaction between these pollutants in the presence of sunlight leads to the formation of smog.
Explanation:Photochemical smog is formed when primary pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) interact with sunlight. These primary pollutants, which can come from sources like vehicle emissions and industrial processes, undergo chemical reactions in the presence of sunlight to produce secondary pollutants, including ozone. The reaction between NOx and VOCs in the presence of sunlight leads to the formation of photochemical smog, which appears as a brown haze above cities.
name two fluid technologies that make use of air.
Answer: an air compressor and desk chair.
Explanation:
Final answer:
Two fluid technologies that make use of air are the Bunsen burner and the atomizer, both operating based on entrainment principles to achieve proper combustion or to create a fine mist spray.
Explanation:
The use of air in fluid technologies is demonstrated through various devices that rely on fluid dynamics. Two specific technologies that utilize air are the Bunsen burner and the atomizer. The Bunsen burner uses an adjustable gas nozzle to entrain air, which is necessary for proper combustion. Atomizers employ a squeeze bulb to create a jet of air that entrains small droplets, such as drops of perfume, allowing them to be sprayed as a fine mist.
These technological applications are significant in daily practices and across several industries. The principle at work in both the Bunsen burner and atomizer is the creation of low-pressure areas through increased fluid speed, causing air to be entrained with another fluid or gas for a particular purpose.
At 700 K the equilibrium constant KC for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7 × 106. The rate constant for the reverse reaction at this temperature is 0.54 M–1s–1. What is the value of the rate constant for the forward reaction at 700 K?
Answer : The value of the rate constant for the forward reaction at 700 K is, [tex]4.70\times 10^6[/tex]
Explanation :
The given chemical equilibrium reaction is:
[tex]NO(g)+O_2(g)\rightleftharpoons NO_2(g)[/tex]
The expression for equilibrium constant is:
[tex]K_c=\frac{[NO_2]}{[NO][O_2]}[/tex]
The expression for rate of forward and backward reaction is:
[tex]R_f=K_f[NO][O_2][/tex]
and,
[tex]R_b=K_b[NO_2][/tex]
As we know that at equilibrium rate of forward reaction is equal to rate of backward reaction.
[tex]R_f=R_b[/tex]
[tex]K_f[NO][O_2]=K_b[NO_2][/tex]
[tex]\frac{K_f}{K_b}=\frac{[NO_2]}{[NO][O_2]}[/tex]
[tex]\frac{K_f}{K_b}=K_c[/tex]
Given:
[tex]K_c=8.7\times 10^6[/tex]
[tex]K_b=0.54M^{-1}s^{-1}[/tex]
Now put all the given values in the above expression we get:
[tex]\frac{K_f}{K_b}=K_c[/tex]
[tex]\frac{K_f}{0.54}=8.7\times 10^6[/tex]
[tex]K_f=4.70\times 10^6[/tex]
Therefore, the value of the rate constant for the forward reaction at 700 K is, [tex]4.70\times 10^6[/tex]
Final answer:
The rate constant for the forward reaction of NO with O2 forming NO2 at 700 K, given the equilibrium constant and the reverse reaction rate, is calculated to be 4.698 × 10^6 M⁻¹s⁻¹.
Explanation:
The question asks for the rate constant for the forward reaction of NO(g) reacting with O₂(g) to form NO₂(g) at 700 K, given the equilibrium constant (KC) and the rate constant for the reverse reaction. To find the rate constant for the forward reaction (kf), we use the relationship between the equilibrium constant and the rate constants of the forward and reverse reactions, which is KC = kf / kr. Given KC = 8.7 × 106 and the reverse rate constant (kr = 0.54 M⁻¹s⁻¹), we can rearrange the formula to solve for kf: kf = KC × kr. Substituting the given values yields kf = 8.7 × 106 × 0.54 M⁻¹s⁻¹ = 4.698 × 106 M⁻¹s⁻¹.
PLZ HELP, GIVING BRAINLIEST!!
Which section of the graph represents the vaporization of the substance?
a. V
b. I
c. IV
d. lll
e. ll
Answer:
if multiple choice e. d. a. if not e.
Explanation:
200.0 mL OF A 5.10 M solution are diluted to 500.0 mL. What is the concentration of the resulting solution? *
Answer:
Concentration of the resulting solution = 2.04 M
Explanation:
Data:
M1 = 5.10 M
V1 = 200.0 mL
V2 = 500.0 mL
M2 = ?
By modifying the volume of solution, keeping the amount of solute constant, the concentration changes. To perform the calculations, the equation will be:
[tex]M1*V1=M2*V2[/tex]
Where M1 is the initial concentration of the solution, M2 the final concentration and V is the value of the volumes of the initial and final solution.
Clearing the value of M2 from the equation and replacing the values we have:
[tex]M2=\frac{M1*V1}{V2} =\frac{5.10M*200mL}{500mL} =2.04M[/tex]
Answer:
2.04M
Explanation:
Using C1V1 = C2V2
where;
C1 = Concentration of stock solution = 5.10M
C2 = Final concentration of new solution = x
V1 = Volume of stock solution = 200ml
V2 = Final volume of new solution = 500ml
Inserting the values into the formulae, we have;
5.10 * 200 = x * 500
x = (5.10 * 200) / 500
x = 2.04M
A reaction is most likely to occur when reactant particles collide with
Answer: Sufficient amount of energy and appropriate orientation.
Explanation:
A chemical reaction is most likely to occur when reactant particles collide with sufficient amount of energy needed to break bonds and
appropriate orientation .
A marshmallow has an initial volume of 0.084 L at standard pressure (1.0 atm). If the marshmallow is placed in a vacuum chamber and the final volume is 0.785L, what is the pressure inside the chamber?
Answer:
The new pressure on the gas P2 = 0.10atm
Explanation:
Data;
V1 = 0.084L
P1 = 1.0atm
V2 = 0.785L
P2 = ?
This question is a practical problem where Boyle's law is applied.
According to Boyle's law, the pressure of a fixed mass of gas is inversely proportional to its volume provided that the temperature on the gas remains constant
Mathematically
P = k / v, k = PV
P1*V1 = P2*V2 = P3*V3..........Pn*Vn
P1 * V1 = P2 * V2
Solving for P2,
P2 = (P1 * V1 ) / V2
P2 = (0.084 * 1) / (0.785)
P2 = 0.10atm
The new pressure of the gas is 0.10atm
Final answer:
Using Boyle's Law, we can determine that the pressure inside the vacuum chamber is approximately 0.107 atm when a marshmallow expands from 0.084 L to 0.785 L at constant temperature.
Explanation:
To determine the pressure inside the vacuum chamber where a marshmallow has expanded from 0.084 L to 0.785 L at constant temperature, we can use the gas laws. According to Boyle's Law, at constant temperature for a given mass, the volume of a gas is inversely proportional to the pressure. The formula for Boyle's Law is P1V1 = P2V2, where P denotes pressure and V denotes volume. Using this law, we calculate as follows:
P1V1 = P2V2
1.0 atm × 0.084 L = P2 × 0.785 L
P2 = (1.0 atm × 0.084 L) / 0.785 L
P2 = 0.084 atm / 0.785
P2 = 0.107 atm
Thus, the pressure inside the vacuum chamber is approximately 0.107 atm when the volume of the marshmallow is 0.785 L.
an animal which eats plants and animals is a(n)
Answer:
An Omnivore
Explanation: An omnivore is a kind of animal that eats either other animals or plants. Some omnivores will hunt and eat their food, like carnivores, eating herbivores and other omnivores. Some others are scavengers and will eat dead matter. Many will eat eggs from other animals.
Omnivores eat plants, but not all kinds of plants. Unlike herbivores, omnivores can't digest some of the substances in grains or other plants that do not produce fruit. They can eat fruits and vegetables, though. Some of the insect omnivores in this simulation are pollinators, which are very important to the life cycle of some kinds of plants.
Answer:
I know this is old but im just trying to get some points
Explanation:
The answer is an omnivore
In 1911, Ernest Rutherford tested the atomic model existing at the time by shooting a beam of alpha particles (42He, helium nuclei) at a very thin sheet of gold foil. He found that while most particles went straight through the foil undeflected, a very few were deflected at great angles as they passed through the foil. Why was this discovery a reason to change the atomic model
Answer:
At the time of Rutherford's experiment, the accepted model for the atom was the Thomson plum-pudding model of the atom, in which the atom consists of a "sphere" of positive charge distributed all over the sphere, with tiny negative particles (the electrons) inside this sphere.
In his experiment, Rutherford shot alpha particles towards a very thin sheet of gold foil. He observed the following things:
1- Most of the alpha particles went undeflected, but
2- Some of them were scattered at very large angles
3- A few of them were even reflected back to their original directions
Observations 2) and 3) were incompatible with Thomson model of the atom: in fact, if this model was true, all the alpha particle should have gone undeflected, or scattered at very small angles. Instead, due to observations 2) and 3), it was clear that:
- The positive charge of the atom was all concentred in a tiny nucleus
- Most of the mass of the atom was also concentrated in the nucleus
So, Rutherford experiment lead to a change in the atomic model of the atom, as it was clear that the plum-pudding model was no longer adequate to describe the results of Rutherford's experiment.
Final answer:
Rutherford's gold foil experiment disproved the plum pudding model by showing that alpha particles were deflected by a dense nucleus within the atom. This discovery led to a new atomic model where a central nucleus is orbited by electrons.
Explanation:
In 1911, Ernest Rutherford's gold foil experiment challenged the then-accepted plum pudding model of the atom. The plum pudding model hypothesized that an atom's mass and charge were uniformly distributed throughout the atom. This model suggested that alpha particles, which are helium nuclei, would pass through a gold foil with little or no deflection. However, Rutherford's experiment revealed that while most particles passed through the foil, a small percentage (approximately 1 in 8000) were deflected at large angles, and some even bounced back toward the source. This suggested that the atom's mass and positive charge were not evenly distributed, but rather concentrated in a small, central nucleus, leading to the development of the nuclear model of the atom.
Rutherford's findings fundamentally altered the scientific understanding of the atomic structure. The dramatic deflections and backscatterings indicated the existence of a compact, positively-charged atomic nucleus, around which the electrons orbited. This discovery was instrumental in moving away from the plum pudding model to one that reflected the modern view of the atom, where a dense nucleus contains most of the atom's mass and positive charge, with electrons residing in the surrounding empty space.
The rate law for a reaction is rate = k[A]2. What is the overall order of this reaction, and which two varaibles, when graphed, will give a straight line for this reaction? A. first order, In[A]t versus t B. first order, 1/[A]t versus t C. second order, In[A]t versus t D. second order, 1/[A]t versus t
Answer:
D. second order, 1/[A]t versus t
Explanation:
Since the power of the concentration is 2 in the rate law, it is a second order reaction. Also, for a second order reaction, the variables that would yield a straight line when graphed are 1/[A]t versus t
Final answer:
The overall order of the reaction is 2 (second-order). A plot of 1/[A]t versus t will give a straight line for this reaction.
Explanation:
The overall order of the reaction is 2, which means it is a second-order reaction. This is because the rate law is rate = k[A]2, indicating that the reaction rate is proportional to the square of the concentration of A.
A plot of 1/[A]t versus t will give a straight line for this reaction. This is because the integrated rate law for second-order reactions has the form of the equation of a straight line: kt + [A]o = 1/[A]t. If the plot of 1/[A]t versus t is not a straight line, the reaction is not second order.
What is a chemical property? It is a characteristic of matter that can be observed without changing its identity. It is a characteristic of matter that can be observed when it changes phases. It is a characteristic of matter that is observable only when the substance is by itself. It is a characteristic of matter that describes its ability to change into a different substance
Answer:
D
Explanation:
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option D.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Chemical property is a characteristic of matter that describes its ability to change into a different substance.
Therefore, the correct option is option D.
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