Final answer:
The final temperature after thermal equilibrium is reached is approximately 46.6°C.
Explanation:
To find the final temperature after thermal equilibrium is reached, we can use the principle of conservation of energy. The heat gained by the cool water is equal to the heat lost by the hot water.
Let's denote the final temperature as T. The heat gained by the cool water can be calculated using the equation q = m * c * ΔT, where q is the heat gained, m is the mass of the cool water, c is the specific heat of water, and ΔT is the change in temperature. The heat lost by the hot water can be calculated using the same equation. Setting the two equations equal to each other and solving for T will give us the final temperature.
Using the given values, we can calculate:
qcool = (200 g) * (4.18 J/g°C) * (T - 32°C)
qhot = (50 g) * (4.18 J/g°C) * (55°C - T)
Setting qcool equal to qhot:
(200 g) * (4.18 J/g°C) * (T - 32°C) = (50 g) * (4.18 J/g°C) * (55°C - T)
Simplifying and solving for T:
800(T - 32°C) = 50(55°C - T)
T = 46.6°C
Therefore, the final temperature after thermal equilibrium is reached is approximately 46.6°C.
The same species of organisms with different physical traits are called
The correct answer is - subspecies.
The subspecies represents an aggregate of phenotypically similar populations of a species. They inhabit a geographic subdivision of the species. They also are differing taxonomically from the other members of the species.
The subspecies are part of a species. They are able to mate with the other members of the species without any problems if they come to a situation like that, and produce healthy offspring. In general, the subspecies is pretty much the same as the species, just that it exhibits some specific physical traits that are not found in the rest of the members of the species.
A perfect example for this is the leopard. The African leopard has short and less dense fur, is larger, lighter in coloration, while the Amur leopard has much denser and longer fur, is slightly smaller, and is darker in coloration. Both of them are part of the same species, but exhibit specific physical traits that make them a subspecies.
What do electromagnetic waves consist of? (choice)
*frequency
*electric & magnetic fields
*longitude
Electromagnetic waves consist of both electric and magnetic field waves. The creation of all electromagnetic waves begins with an oscillating charged particle, which creates oscillating electric and magnetic fields.
Final answer:
Electromagnetic waves consist of oscillating electric and magnetic fields, and propagate at the speed of light.
Explanation:
Electromagnetic waves consist of oscillating electric and magnetic fields. These waves propagate at the speed of light and can be described as transverse waves. They have different frequencies, wavelengths, and energies, but all travel at the same speed in a vacuum.
Consider the situation. Scientists have developed an explanation of a phenomenon from several verified hypotheses. The explanation has been confirmed through numerous experimental tests.
Which option best describes this explanation?
A. research question
B. scientific theory
C. scientific law
D.hypothesis
I think its B or D.
scientific theory
hope this helps :)
Answer:
B. scientific theory
Explanation:
The scientific theory explains the phenomenon observed in the natural world. It is based upon the scientific method. To arrive at the scientific theory a hypothesis is formed, experiments are designed and conducted, resulted evaluated, analyzed and conclusions are reached. scientific theory are based upon experiments that are tested under controlled conditions.
Elements can be represented by chemical symbols. Which of the following is the correct way to write the chemical symbol for sodium?
Na
hope this helps :)
NEED HELP ASAP
Which statements describe competition for shelter? Check all that apply.
A. Bees work together to construct a beehive.
B. Two prairie dogs fight over underground space.
C. Several monkeys work to create a space for their young.
D. A pack of lions roar to protect their territory from other lions.
E. Penguins push each other to find room on a floating iceberg.
Answers are B, D and E. A and C are cooperation for shelter.
Explanation:
Competition means when more than one person or individual is competing for a certain thing.
For example, two prairie dogs fight over underground space.
This means that both the dogs are fighting to have a house for themselves.
Thus, we can conclude that statements which describe competition for shelter are as follows.
Two prairie dogs fight over underground space.A pack of lions roar to protect their territory from other lions.Penguins push each other to find room on a floating iceberg.An elements atomic number is 117 how many electrons would an atom of this element have?
117 because the number of protons and neutrons are the same as the atomic mass.
Final answer:
A neutral atom with an atomic number of 117 would have 117 electrons. The valence shell of element 117 (Tennessine) is likely to have 7 electrons, similar to other halogens, though high atomic number elements can be unpredictable due to their instability.
Explanation:
If an element has an atomic number of 117, it means that a neutral atom of this element would have 117 protons in its nucleus. According to the basic rules of atomic structure, a neutral atom has the same number of protons and electrons. Therefore, an atom of this element would have 117 electrons.
Regarding the valence shell electron configuration, since element 117 (Tennessine, Ts) is in the 17th group of the periodic table and is part of the halogens, its valence shell could be similar to that of other halogens. Considering the periodic trends and the fact that it belongs to the 7th period of the table, its valence shell would likely have 7 electrons. However, due to its high atomic number and unstable nature, the element's chemistry might not entirely follow the trends observed in lighter elements.
Which of the following is true for the equilibrium constant of a reaction? Its value remains constant at different temperatures. It is a ratio of coefficients of reactants to products. It is represented by the symbol K. Its value is always less than 1.
Answer:
Option C :-It is represented by K.
Explanation:
Equilibrium constant is the ratio of products to reactants.
It has a constant value at specific temperature. If temperature changes, K also changes.
It has a value in the range of 0.001 to 1000.
Answer: Option (c) is the correct answer.
Explanation:
Equilibrium reaction means when rate of forward reaction is equal to rate of backward reaction.
And, relationship between the amount of products and the amount of reactants present in an equilibrium reaction at a given temperature is known as equilibrium constant.
Equilibrium constant is denoted by 'K'.
For example, [tex]xA + yB \rightarrow zC[/tex]
The equilibrium constant for this reaction will be as follows.
K = [tex]\frac{[C]^{z}}{[A]^{x}[B]^{y}}[/tex]
Therefore, it is the ratio of products to reactants. And, if value of K > 1 then it means that the mixture contains mostly products whereas K < 1 means that the mixture contains mostly reactants.
Hence, we can conclude that out of the given options it is represented by the symbol K, is true for the equilibrium constant of a reaction.
65 grams of calcium equal how many moles?
1.6218377410367840 that would be your answer but dont forget to round it to the closets number
what is the bronsted acid of NO2- + H2O HNO2 + OH-
H2O -Bronsted Acid
Explanation;Bronsted-Lowry acids are H+ donors , while Bronsted-Lowry bases are H+ acceptors .A reaction of a Bronsted-Lowry acid and a Bronsted base is a neutralization reaction that is characterized by H+ transfer.The above reaction is an example of base ionization or dissociation where;B (aq) + H2O (l) → BH+ (aq) + OH– (aq)
That is; Base + Acid will give a conjugate acid + hydroxide ion
In our case; NO2- + H2O → HNO2 + OH- ; H2O is the H+ donor and thus, it is a Bronsted Acid.In the gender reaction water acts as the Bronsted acid because it donates a proton to the nitrite ion which in turn acts as the Bronsted base.
Explanation:In the given equation NO2- + H2O -> HNO2 + OH-, the Bronsted acid is H2O. According to the Bronsted-Lowry definition an acid is a substance that can donate a proton (H+), and a base is a substance that can accept a proton. In this reaction water (H2O) donates a proton to the nitrite ion (NO2-) and hence it is the Bronsted acid. The nitrite ion is the Bronsted base because it accepts a proton from water to form nitrous acid (HNO2).
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Why do you think the process to create a protected area takes so long?
The process to create a protected area takes a long time because there's numerous things that have to be taken in account and sorted out before the area gets that kind of legal status.
Usually there's people living in the area that is supposed to be protected, though it is mostly small settlements. The people living there are connected with that area, use the resources, and their lives are largely based and dependent on it. In order for any problems to be avoided, these people should all be educated, deals to be made with them, and properly negotiated so that the area wouldn't have any damage, but also them to be able to sustain themselves.
The boundaries of the area are also complicated, it it takes time to sort out what parts should be included and what not. Basically to set the priorities.
People should be employed to protect and take care of the area, so they have to undergo a training, education, and to get familiar with it.
The legalization of the area as such can sometimes too make problems and take some time.
All the elements of a family in the periodic table have what feature in common?
They all have the same number of electrons in the electron cloud.
The have same number of valence electrons
Explanation:The elements in the same group has similar number of valence electrons. For instance All the alkali metals in Group 1 have 1 valence electron, so they all tend to react the same way with other substances. The elements in each group have the same number of electrons in the outer orbital which are responsible for the chemical properties of element so we can say that each family has the same chemical properties.
Thermal energy is the _____ and internal energy is the _____
Answers.
Average kinetic energy of the particles in an object.
Total energy of particles in an object.
Total translation kinetic energy of the particles in an object.
Answer:
Thermal energy is the Total translation kinetic energy of the particles in an object and internal energy is the Total energy of particles in an object
Explanation:
Answer:
Thermal is total translation kinetic energy of the particles in an object and Internal energy is the total energy of particles in an object
Explanation:
Emma sings into a microphone. The sound is transferred from the microphone to a loudspeaker that is plugged into the wall. Her voice comes out of the loudspeaker and sounds much louder than before.
In this system, sound energy is being transformed into _______ energy and then back into _______ energy.
Electrical energy and back to sound energy
Electrical then back into sound
A book is resting on a table. The book has
A)kinetic energy only.
B)potential energy only.
C)both kinetic and potential energy.
D)neither kinetic or potential energy.
Hey there!
The correct answer should be B. Potential Energy Only
Potential energy is the energy stored in an object because it isn’t moving/isn’t in motion
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Which of the following statements about air masses is true?
A.
Air masses are areas of condensed water vapor, which are also known as clouds.
B.
Air masses are responsible for creating holes in the ozone layer.
C.
Air masses maintain the same moisture and temperature as they move over new areas.
D.
Air masses are created by patterns of heating and cooling of the Earth's surface.
Answer:
The correct answer is: D. Air masses are created by patterns of heating and cooling of the Earth's surface.
Explanation:
The air masses can be simply be divided into warm and cold ones, further they can be moist or not. The formation of the air masses, be it warm and cold, over the land masses is because of patterns of heating and cooling. This results some areas to produce very large air masses that are cold and dry, like Siberia, or warm and dry large air masses, like Sahara. Also, on a local level there's air masses that develop every day and night, which is noticeable during the night and the morning, where the colder air masses from the mountains move down to the valleys, and the warm air masses from the valleys move up to the mountains. That is a because of the change in the heating and cooling patters that differ during the day and the night.
Answer:
The correct answer is: D. Air masses are created by patterns of heating and cooling of the Earth's surface.
Explanation:
Which arrow represents the activation energy of the forward reaction
B) B
Explanation;Activation energy is the least possible amount of energy which is required to start a reaction or the amount of energy available in a chemical system for a reaction to take place.A reaction won’t occur unless atoms or molecules of reactants come together. This happens only if the particles are moving, and movement takes energy. Reactants have to overcome forces that push them apart. The energy is called activation energy.The activation energy for the forward reaction is represented by the arrow from the reactants to the transition state in a reaction diagram.
Explanation:In a reaction diagram, the activation energy for the forward reaction is represented by the arrow from the reactants to the transition state. This arrow shows the energy barrier that must be overcome for the reaction to occur. The activation energy is the minimum amount of energy that reactant particles must have in order to successfully collide and form products.
a sound waves frequency is 4 hz and its wavelength is 8 meters. what is the waves speed
Answer:
32 m/s
Explanation:
Frequency is the number of waves that pass a particular point in 1 second
Wavelength is the distance between 2 crests or 2 troughs
Speed = frequency x wavelength
Substituting the values
Speed = 4 Hz x 8 m
Speed = 32 m/s
Waves speed is 32 m/s
The speed of the sound wave is 32 meters per second.
To find the speed of the wave, we can use the relationship between speed, frequency, and wavelength, which is given by the equation:
[tex]\[ \text{Speed} = \text{Frequency} \times \text{Wavelength} \][/tex]
Given that the frequency of the sound wave is 4 Hz (hertz) and the wavelength is 8 meters, we can plug these values into the equation:
[tex]\[ \text{Speed} = 4 \, \text{Hz} \times 8 \, \text{m} \] \[ \text{Speed} = 32 \, \text{m/s} \][/tex]
Therefore, the speed of the sound wave is 32 meters per second. This is a fundamental relationship in wave mechanics, where the speed of a wave is the product of its frequency and its wavelength.
A chemist needs 22.0 grams of phenol, C6H5OH, for an experiment. how many molecules of phenol would this be?
0.234 mol C[tex]C_{6} H_{5} OH[/tex]
The number of molecules would be - 1.410*[tex]10^{23}[/tex] molecules in 22 grams of phenols.
The molecular formula of Phenol is C6H5OH
, Therefore, molecular weight:
= 6(Mass of carbon) + 6(Mass of hydrogen) + 1 (Mass of oxygen)
= 6 × 12.0107 + 6 × 1.00784 + 15.999 × 1
= 94.11
=> The number of moles of phenols:
=> No of mol of phenol = weight/Mwt
[tex]\frac{weight}{molecular\ weight}\\\\= \frac{22}{94.11}\\[/tex]
= 0.234 moles
=> The number of molecules of phenol would be in 22 grams:
molecules = [tex]6.022 \times 10^{23} *\ (number\ of\ moles)[/tex]
[tex]6.022 \times 10^{23} \times (0.234)\\= 1.410 \times 10^{23}[/tex]
Thus, the number of molecules would be - 1.410 [tex]\times 10^{23}[/tex] molecules.
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Which force always attracts objects to each other?
Gravity is a force that always attracts or pulls objects toward each other without direct contact or impact. Gravitational attraction depends on the mass of the two objects and the distance they are apart. Objects on Earth are pulled toward the center of Earth.
If 100.0 ml of HCI stock solution is used to make 500.0-ml of a 0.675 M HCI dilution, what is the molarity of the stock solution ?
Answer:
3.375 M.
Explanation:
It is known that the no. of millimoles of HCl before dilution = the no. of millimoles of HCl after dilution.∵ (MV) before dilution = (MV) after dilution.
∴ M before dilution = (MV) after dilution / V before dilution = (0.675 M)(500.0 mL)/(100.0 mL) = 3.375 M.
Which functional group is found in an ester
RCOOR. the answer is first option
when iron rusts it no longer conducts electricity this is because
it has gone through the process of a chemical reaction, and is no longer in its original form, which makes it lose its means of conductivity
Final answer:
Iron rusts when exposed to oxygen and water, forming a red-brown hydrated metal oxide called rust. This rust is a poor conductor of electricity compared to iron metal. The rust continually flakes off, exposing fresh metal surface susceptible to further oxidation.
Explanation:
Iron rusts when it is exposed to oxygen and water. The rust that forms on iron is a red-brown hydrated metal oxide known as Fe2O3 xH2O. When iron rusts, it no longer conducts electricity because the rust is a poor conductor compared to the original iron metal. The rust flakes off continuously, exposing a fresh metal surface that is vulnerable to further reaction with oxygen and water.
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
49 POINTS!!! PLEASE HELP ME HURRY!!!
Find the volume of each figure to the nearest tenth.
V = L x W x H
V = 11 x 5 x 6
V = 330
the volume is V = 330 cm
V=L*W*H
NEED HELP ASAP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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 would be A: Simple machines are tools that make work easier.
➷ Simple machined are tools that make work easier. Option A is correct.
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What is a light year?
A.The distance light travels in one earth year
B.The distance light travels from the sun to the earth
C.The distance light travels in one orbit of the moon
D.The time it takes light to travel across the universe
Final answer:
A light year is the distance light is able to travel in one year in space, which is approximately 9.5 trillion kilometers. It is often used by astronomers to measure large distances between celestial objects such as stars and galaxies. Correct answer to the student's question is option A.
Explanation:
A light year is a unit of distance equal to the distance light travels in one year. When light travels in the vacuum of space, it moves at a speed of about 300,000 kilometers per second(km/s), which is the fastest speed anything can travel in the universe.
Therefore, the true answer to the question is A.
The distance light travels in one earth year. This equates to approximately 9.5 trillion kilometers.
Light-years are commonly used by astronomers to measure vast distances in the universe. For example, the nearest star to us, Proxima Centauri, lies about 4.24 light years away from Earth, and the Andromeda Galaxy, our closest large galactic neighbor, is roughly 2.5 million light years distant.
When we observe celestial bodies like stars and galaxies, we see them as they were years, centuries, or even millennia ago because their light has taken that long to reach us.
Which type of fire is sometimes set as a way to protect a forest?
Surface fire
Explanation;Surface fires are type of forest fires that may burn primarily as a surface fire, spreading along the ground as the surface litter and undergrowth on the forest floor and is engulfed by the spreading flames.They are the easiest fires to put out and cause the least damage to the forest. Surface fires create the least amount of destruction.These fires protects the forest by releasing the nutrients that would otherwise decompose slowly, having little benefit to the ecosystem.Additionally, these fires allow more open spaces for new and different kinds of vegetation to grow and receive sunlight.Scientists learn about the universe by studying the light that comes to Earth from stars and other objects in space. If you were a scientist hoping to understand the universe, what three questions would you ask?
there's really no specific answer but mine would be...
1. how does that light show from earth?
2. will that light ever dim?
3. are some stars bright but just not bright enough that we can see?
How many stars are in space?
How far away from Earth are certain stars?
Are there other planets like Earth?
What is the universe?The universe is everything. It includes all of space and all the matter and energy that space contains.
Three questions are:
How many stars are in space?How far away from Earth are certain stars?Are there other planets like Earth?Learn more about the universe here:
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Which statement best describes the use of a chemical indicator in a titration ?
A chemical indicator in a titration experiment must change the color of the solution near the equivalence point.
what is the percentage yield of carbon disulfide if the reaction of 32.0g of sulfur dioxide produces 12.0g of carbon disulfide?
= 63.04 %
Explanation;The balanced equation for the reaction;
5 C + 2 SO2 → CS2 + 4 CO
We can calculate the theoretical yield;
= (32.0 g SO2) / (64 g C/mol) x (1/2) x (76.1418 g CS2/mol)
= 19.035 g CS2 in theory
But;
Percentage yield = Actual yield/theoretical yield × 100%
= (12.0 g) / ( 19.035 g) × 100%
= 0.6304 × 100%
= 63.04%
Final answer:
To calculate the percentage yield of carbon disulfide, we can compare the actual yield to the theoretical yield. Using stoichiometry, we can calculate the theoretical yield based on the given masses of sulfur dioxide and carbon disulfide. The percentage yield is found to be 31.5%.
Explanation:
To calculate the percentage yield of carbon disulfide in this reaction, we need to compare the actual yield (12.0g) to the theoretical yield. The theoretical yield can be calculated using stoichiometry by converting the mass of sulfur dioxide (32.0g) to moles, and then using the mole ratio between sulfur dioxide and carbon disulfide in the balanced equation.
First, let's find the moles of sulfur dioxide:
32.0g SO2 * (1 mol SO2 / 64.06g SO2) = 0.500 mol SO2
According to the balanced equation, 1 mol of SO2 produces 1 mol of carbon disulfide. So, the theoretical yield of carbon disulfide is also 0.500 mol.
Now, we can convert the theoretical yield from moles to grams:
0.500 mol CS2 * (76.14g CS2 / 1 mol CS2) = 38.07g CS2
Finally, we can calculate the percentage yield:
Percentage yield = (Actual yield / Theoretical yield) * 100
Percentage yield = (12.0g / 38.07g) * 100 = 31.5%