If you have 16 moles of O2 in a balloon at 25°C and 1 atm, the volume of oxygen in the balloon is 390.5 liters.
The volume of oxygen in a balloon containing 16 moles of O2 depends on the temperature and pressure of the gas. To find the volume, we can use the ideal gas law equation PV = nRT, where P is the pressure of the gas, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
Assuming the temperature and pressure are constant, we can rearrange the equation to solve for volume: V = nRT/P. The value of R is 0.0821 L·atm/mol·K.
Let's assume that the temperature is 25°C, or 298 K, and the pressure is 1 atm. Plugging in the values, we get:
V = (16 mol)(0.0821 L·atm/mol·K)(298 K)/(1 atm)
V = 390.5 L
Therefore, if you have 16 moles of O2 in a balloon at 25°C and 1 atm, the volume of oxygen in the balloon is 390.5 liters.
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WILL GIVE BRAINLY
As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the
box and the floor become warn. During this process, what happens to energy?
OIt is increased.
O It is conserved.
O It is decreased.
O It is created.
Answer:
It is conserved
Explanation:
A week late (hehe)
During the given situation, the energy is conserved because, the energy lost by the person is gained by the box and becomes warm so the total energy is conserved.
What is conservation of energy ?The conservation of energy is a fundamental principle in physics that states that energy cannot be created or destroyed, but only transformed from one form to another. This means that the total amount of energy in a closed system remains constant over time.
The principle of conservation of energy is based on the understanding that energy exists in different forms, such as mechanical energy, thermal energy, electrical energy, chemical energy, and others. Energy can be converted from one form to another, but the total amount of energy in the system remains the same.
Therefore, for the given situation, the energy is conserved because, the energy lost by the person is gained by the box and becomes warm so the total energy is conserved.
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please help!! thank you!!
Answer:
d
Explanation:
How many grams of H 2 O can be produced with 6.3 moles of O 2 ?
Answer:
3.15×18
56.7
................
Describe the formation of calcium chloride (4 marks)
Answer:
It is an ionic compound that consists of one calcium cation Ca2+ and two chlorine anions. The bivalent calcium metal forms an ionic bond with two chlorine atoms. The formation of cacl2 happens mainly by reacting limestone (CaCo3) with hydrochloric acid (HCl).
Please help with this Unit Conversions problem!
"Convert 7.54 kg to mg. Show your work."
Answer:
7,540,000 mg
Explanation:
1 kg = 1,000,000 mg
7.54 kg x 1,000,000= 7,540,000 mg
because the environments in which they created change constnanly, mass comunication theories are said to be
Because the environments in which they created change constantly, mass communication theories are said to be dynamic.
What are the four mass communication theories?
Authoritarian theory, libertarian theory, social responsibility theory, and soviet media theory are the "original" four theories of the mass communication.
Analysis of extensive information exchanges is the focus of the discipline of study known as mass communication. There are numerous theories of mass communication, all of which place emphasis on the speaker, media sources, audience, and other pertinent elements.
Theories of mass communication are important because they shed light on how people utilize, interact with, and distribute media. These theories offer a framework for comprehending the impact that the messages in media may have on audiences. For professionals in professions like marketing, broadcasting, journalism, or related ones, mass communication theories may be useful.
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How many moles of solute are present in 150mL of 0.30 mol/L NaOH solution
Answer: n= 0.045 mol
Explanation: amount of substance in moles is n= cV= 0.30 mol/l· 0.150 l
Is the copper in a copper wire a homogeneous or heterogeneous mixture
Which of the following redox couples has the highest (most positive) redox potential? a. Proo/ P700 b. plastoquinone/plastoquinol c. NADP'/NADPH d. plastocyanin-Cu2 /plastocyanin-Cu e. O2/H20
The redox couple with the highest (most positive) redox potential is d. plastocyanin-Cu2+/plastocyanin-Cu.
The redox couple plastocyanin-Cu2+/plastocyanin-Cu does indeed have the highest (most positive) redox potential among the options provided.
Plastocyanin is a copper-containing protein involved in electron transfer within the photosynthetic electron transport chain. Its redox potential is relatively high due to the strong oxidizing properties of copper and its ability to accept and donate electrons during the electron transfer process.
Compared to the other redox couples mentioned in the options, plastocyanin-Cu2+/plastocyanin-Cu has the highest redox potential, making it an essential component in the electron transfer process and contributing to the efficient functioning of photosynthesis.
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Name the Compound CS4
Monocarbon tetrasulfide
Monocarbon sulfide
Carbon tetrasulfide
Carbon sulfide
Answer:
Monocarbon tetrasulfide
Explanation:
Name of compound is mono carbon tetrasulfide.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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What electrical charges do these parts have ?
Answer:
which parts electrical charges you are asking ??
Which of the following is a goal of workers in the legal services and public safety field?
They ensure that people are happy with their life experiences.
They help people realize their full potential.
They look for ways to make people responsible for situations in other people's lives.
They seek to protect people and their property.
Answer:
they help people realize their full potential
Explanation:
yes
Answer:
they seek to protect people and their property
Explanation:
Hydrazine (N_2H_4) decomposes to produce N_2 and NH_3. How many molecules of NH_3 will be formed if 60 molecules of N_2H_4 decompose into N_2 and NH_3
80 molecules of \(NH_{3}\) will be formed if 60 molecules of \(N_{2}H_{4}\) decomposes into \(N_{2}\) and \(NH_{3}\)
What are molecules?The smallest particle of a substance has all of the physical and chemical properties of that substance. Molecules are made up of one or more atoms.
Just balance the reaction:
\(3N_{2}H_{4}\to N_{2}+4NH_{3}\)
Now you can see that every 3 molecules of \(N_{2}H_{4}\)4 molecules of \(NH_{3}\).
For 60molecules of \(N_{2}H_{4}\) we scale up these numbers by a factor of 60/3 = 20.
Therefore 4x20 = 80 molecules of \(NH_{3}\) are formed.
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What is the concentration of hplus ions at a ph=11
Answer: 10^-11
Explanation:
to find the concentration of H+ ions given the ph, we use the formula 10^(-pH).
so 10^-11
10. Oil formed from ---
that were once alive.
A. Plants
B. Plants and animals
It should be b
oil was formed from sea animals and bacteria or plants like algae. hope this helps!
Thanksgiving is November 26th. Today is November 9th. How many seconds are there until Thanksgiving Day?
What is the function of the structure labeled Y?
to keep oxygen-rich blood and oxygen-poor blood flowing
to filter waste materials from oxygen-poor blood
to filter waste materials from oxygen-rich blood
to keep oxygen-rich blood and oxygen-poor blood separate
The function of Y would be to keep oxygen-rich blood and oxygen-poor blood separate. The last option is the correct one.
Function of the SeptumY is the septum
The septum is a structure of the heart that separates the left atrium from the right atrium as well as the two ventricles.
Thus, the structure prevents oxygenated blood from mixing with deoxygenated blood.
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__________ refers to reactions in which small molecules are combined to build larger molecules.
The main answer to your question is "anabolic reactions".
Anabolic reactions refer to the process by which small molecules are combined to build larger molecules.
This process requires energy and is usually associated with the growth and repair of tissues in organisms.
In contrast, catabolic reactions break down larger molecules into smaller ones and release energy in the process.
Anabolic reactions are the process of combining small molecules to form larger, more complex molecules, playing a crucial role in growth and tissue maintenance.
In summary, anabolic reactions are essential for the synthesis of complex molecules, while catabolic reactions provide energy for cellular activities.
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14. The atoms of element X contains nineteen electrons. With which of the following elements will the chemistry of Z be similar? a Aluminum b) Bromine c) Lithium d) Magnesium
First of all, Z is unknown. I hope it is a mistake.
Now, it is given that the element X has nineteen electrons. This proves that X is actually Potassium.
As per the periodic table, both Potassium and Lithium belongs to group 1 as their valency is 1 because of the presence of only one electron in the outermost shell of electrons i.e., they lose an electron during a chemical reaction to form a stable compound. Furthermore, both are metallic.
Magnesium belongs to group 2 and hence its valency is two, which is different from potassium though it is metallic. Similiarly, bromine belongs to group 17 and gains one electron during a reaction in contrast to potassium.
( No internal links available for reference. For clarification, check the periodic table).
What are some differences between pure substances and mixtures?
Answer:
. a pure substance consists only of one element or one compound.
. a mixture consists of two or more different substances, not chemically joined together
The bright-line emission spectrum of an element can best be explained by.
The light emitted by an element when its electrons return to a lower energy state can be viewed as a bright line emission spectrum.
What is Emission spectrum ?The distribution of electromagnetic radiation released by a substance whose atoms have been excited by heat or radiation.
A spectroscope can be used to determine which frequencies have been emitted by a substance.
An emission line will appear in a spectrum if the source emits specific wavelengths of radiation.
This emission occurs when an atom, element or molecule in an excited state returns to a configuration of lower energy.
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help me get it right but don't send links
what makes sprite a substitute for egg in baking?
Carbonated water is used makes sprite a substitute for egg in baking
Carbonated water can add moisture to recipes, but it also works as a great leavening agent
What is carbonated water ?
Carbonated water (soda water, bottled water, sparkling water, club soda, gassed water, also known as bottled water in many places, especially in the United States as seltzer or seltzer water) contains dissolved carbon dioxide. It is also water containing gas. It is artificially injected under pressure or occurs by natural geological processes. Carbonation creates tiny bubbles, giving the water a carbonation quality. Common forms include sparkling natural mineral water, club soda, and commercial sparkling water.
Carbonated water can add moisture to recipes, but it also works as a great leavening agent. Carbonation traps air bubbles and makes the finished product light and fluffy. You can substitute 60 grams of sparkling water per egg. This alternative is great for cakes, cupcakes and quick breads
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Which sentence is true of all Brønsted-Lowry bases?
A. They can donate a hydrogen ion.
B. They can accept a hydrogen ion.
C. They can produce hydronium.
D. They are positively charged.
E. They are negatively charged.
Considering the Brønsted-Lowry theory, the correct answer is option B. a base can accept a hydrogen ion.
Brønsted-Lowry theoryIn the Brønsted-Lowry theory, a proton transfer occurs that requires the presence of a proton donor, that is, an acid, and a base that accepts them. In this way, the acid-base reaction is one in which the acid transfers a proton to a base.
Then, according to the Brønsted-Lowry Theory, a base is a substance capable of accepting protons (H⁺) in solution, and an acid is any species capable of donating a proton (H⁺).
SummaryAccording to the Brønsted-Lowry Theory, a base can accept a hydrogen ion.
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In a buffer solution made of acetic acid and sodium acetate, any acid that is added will react with:
Select the correct answer below:
hydronium
hydroxide
acetic acid
acetate
In a buffer solution made of acetic acid and sodium acetate, any acid that is added will react with hydroxide.
What is acid?Acid is a substance that has a pH level of less than 7, meaning it is more acidic than pure water. Acids are found in nature and are also produced through chemical reactions. Acids are able to dissolve certain substances, such as metals, and can be used to break down proteins, fats, and carbohydrates. Acids are often used in industrial processes, such as in the production of fertilizers and in electroplating. Acids can be classified as either mineral acids, such as hydrochloric acid, or organic acids, such as acetic acid. Acids can be beneficial, such as when used in food processing and preservation, or hazardous, such as when exposed to skin or eyes. Acids can also be used in cleaning products, including to remove rust and calcium deposits.
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Expplain why rooms upstairs or in the attic are often the warmmest plpaces in the house.Make sure to refare to conduction convection radiation in your explanation
The rooms upstairs or in the attic are often the warmest places in the house because of heat transfer by convection (rising of hot air), conduction (heating of the attic level by the ceiling) and radiation (transfer of heat rays from attic floor to the roof).
What is heat transfer by convection?Heat transfer by convection is the process of heat transfer by the bulk movement of molecules within fluids such as gases and liquids.
Convection current occurs when warm or hot rises up and cool air with higher density moves down to replace the hot risen air.
The rooms upstairs or in the attic are often the warmest places in the house because warm air in the home rises due to heat transfer by convection.
The heat from the hot ceiling is transferred to the attic level by conduction heat transfer process. The roof also receives heat radiation from the attic floor.
Thus, the rooms upstairs or in the attic are often the warmest places in the house because of heat transfer by convection (rising of hot air), conduction (heating of the attic level by the ceiling) and radiation (transfer of heat rays from attic floor to the roof).
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The process that causes a spark to occur when the discharge wand is close to the Van de Graaff generator is similar to the process that causes lightning to form. Use what you have learned about the tendency of potential energy to decrease to try to explain how lightning occurs.
Answer:
Lighter, positively charged particles form at the top of the cloud. Heavier, negatively charged particles sink to the bottom of the cloud. When the positive and negative charges grow large enough, a giant spark - lightning - occurs between the two charges within the cloud.
Explanation:
Lighter, positively charged particles form at the top of the cloud. Heavier, negatively charged particles sink to the bottom of the cloud.
What is a generator?In electricity generation, a generator is a device that converts motive power (mechanical energy) into electric power for use in an external circuit.
Lightning is an electric current. To make this electric current, a cloud is needed.
When the ground is hot, it heats the air above it. This warm air rises. As the air rises, water vapour cools and forms a cloud. When air continues to rise, the cloud gets bigger and bigger. In the tops of the clouds, the temperature is below freezing and the water vapour turns into ice.
Now, the cloud becomes a thundercloud. Lots of small bits of ice bump into each other as they move around. All these collisions cause a build-up of electrical charge.
Eventually, the whole cloud fills up with electrical charges. Lighter, positively charged particles form at the top of the cloud. Heavier, negatively charged particles sink to the bottom of the cloud.
When the positive and negative charges grow large enough, a giant spark - lightning - occurs between the two charges within the cloud. This is like a static electricity sparks you see, but much bigger.
Hence, the positive and negative charges grow large enough, that a giant spark - lightning - occurs between the two charges within the cloud.
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Real gases and vapors deviate from ideal behavior on account of intermolecular interactions. One equation of state for a real gas is the van der Waals equation, which is expressed in terms of two parameters,
and
The gas which have the largest Van der Waals constant a is ammonia, NH₃.
The Intermolecular forces in between the molecules are forces that are the attractive forces which make them together or will be impart physical properties. The Stronger the forces and the closer the molecules of the substance.
The molecule that have the strongest forces and that will have the largest value of the Van der Waals constant a. The gas which have the largest Van der Waals constant a is ammonia, NH₃ as the ammonia has the strongest force because of the hydrogen bonding. Therefore, the NH₃ has the largest value of the a.
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This question is incomplete, the complete question is :
Real gases and vapors deviate from ideal behavior on account of intermolecular interactions. One equation of state for a real gas is the van der Waals equation, which is expressed in terms of two parameters, a and b. Which gas would you expect to have the largest Van der Waals constant a: F₂, Ne, NH₃.
how many moles are in 54g of sliver
Answer:
0.50 mols Ag
Explanation:
Given the data, we have:
mass= 54g
molar mass of Silver (Ag): 107.8 g/mol
We want moles, we can convert grams > moles using the molar mass as a "bridge" between the 2.
\(54g * \frac{1 mol}{107.8 g}= 0.50 mols Ag\)
Keeping an eye on the units, we'll see 54g get cancelled out by 107.8 g/mol and we'll be left with moles of Silver.
Homework for 2022.9.22 2. If LTI systems have the impulse responses as the following: h
1
(t)=u(t+1)−u(t−3) h
2
(t)=u(t)−2u(t−1)+u(t−2) (a) Determine whether the systems are causal; (b)Determine whether the systems are stable; (c) Find and sketch the system responses t the input x(t)=δ(t−1)−2δ(t+1).
a) The impulse response is
u(t) - 2u(t-1) + u(t-2)
This is a causal system as it depends only on the present and past input values.
b) The impulse response is absolutely summable and hence the system is stable.
c) The system responses are
y1(t) = 2δ(t) - δ(t-2) - 2δ(t+2)
y2(t) = δ(t-1) - 2δ(t) + δ(t-2) - 2δ(t+1) + 4δ(t+2) - 2δ(t+3)
Given, the impulse responses of two LTI systems are as follows:
h1(t) = u(t+1) - u(t-3)
and
h2(t) = u(t) - 2u(t-1) + u(t-2)
(a) Causal systems are those which have their output dependent only on the present and past input values.
To check whether the given systems are causal or not, we have to check the impulse responses for h1(t) and h2(t).
For h1(t), the impulse response isu(t+1) - u(t-3)
It is not causal as the output for t < -1 will depend on the future input values.
For h2(t), the impulse response is
u(t) - 2u(t-1) + u(t-2)
This is a causal system as it depends only on the present and past input values.
(b) The systems will be stable if the impulse responses are absolutely summable.
For
h1(t),|h1(t)| = |u(t+1) - u(t-3)|
= 1 for t = 2, 3, ..., 4
= 0 elsewhere
∴ The impulse response is absolutely summable and hence the system is stable.
For h2(t)
|h2(t)| = |u(t) - 2u(t-1) + u(t-2)| = 1
for t = 2, 3
= 0 elsewhere
∴ The impulse response is absolutely summable and hence the system is stable.
(c) The response of the system to the input
x(t) = δ(t-1) - 2δ(t+1)
will be given by
y(t) = x(t) * h(t)
where, h(t) is the impulse response of the system
For h1(t), the impulse response is
h1(t) = u(t+1) - u(t-3)
Therefore,
y1(t) = x(t) * h1(t)
= (δ(t-1) - 2δ(t+1)) * (u(t+1) - u(t-3))
= δ(t) - δ(t-2) - 2δ(t+2) + 2δ(t)
= 2δ(t) - δ(t-2) - 2δ(t+2)
For h2(t), the impulse response is
h2(t) = u(t) - 2u(t-1) + u(t-2)
Therefore,
y2(t) = x(t) * h2(t)
= (δ(t-1) - 2δ(t+1)) * (u(t) - 2u(t-1) + u(t-2))
= δ(t-1) - 2δ(t) + δ(t-2) - 2δ(t+1) + 4δ(t+2) - 2δ(t+3)
The plots of the system responses are as follows:
Therefore, the system responses are
y1(t) = 2δ(t) - δ(t-2) - 2δ(t+2)
y2(t) = δ(t-1) - 2δ(t) + δ(t-2) - 2δ(t+1) + 4δ(t+2) - 2δ(t+3)
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