Answer:
htyiu
Explanation:
A 623 ml sample of gas at STP is allowed to expand (like the universe) until it
occupies a volume of 1200 ml, What temperature would be needed to return the
gas to standard pressure? (all trying to find some equilibrium)
P
T
V
Initial latm
623
Final
loton
Effect
고
212
Yoo
&
a. What variables are constant? (NOT CHANGING!)
Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are mixed. If a precipitate will form, enter its empirical
formula in the last column.
solution A
solution B
Does a
precipitate form
when A and B
are mixed?
Oyes no
empirical
formula of
precipitate
х
X
x
5
?
copper(II) chloride
sodium sulfide
potassium sulfate
O yes no
lead(II) nitrate
ammonium bromide
sodium hydroxide
O yes no
Que
The reaction between copper II chloride and sodium sulfide as well as lead II nitrate and potassium sulfate both produce precipitates.
The solubility of a substance in water is in accordance with the solubility rules. It is possible that a solid product may be formed when two aqueous solutions are mixed together. That solid product is referred to as a precipitate.
Now, we will consider each reaction individually to decode whether or not a precipitate is possible.
In the first reaction, we have; CuCl2(aq) + Na2S(aq) ---->CuS(s) + 2NaCl(aq). A precipitate (CuS) is formed.In the second reaction, Pb(NO3)2(aq) + 2KNO3(aq) ----> PbSO4(s) + KNO3(aq), a precipitate PbSO4 is formedIn the third reaction, NH4Br(aq) + NaOH(aq) ----->NH3(g) + NaBr(aq) + H2O(l), a precipitate is not formed here.Learn more: https://brainly.com/question/11969651
What indicates that two objects are in thermal equilibrium?
A The Objects Are the same size
B The objects Have the same temperature
C The objects are touching each other.
D The objects' temperatures are changing.
Answer:
B
Explanation:
equilibrium happens when two things are in complete balance and thermal is in reference to heat so two things are in thermal equilibrium once they have the same temperature.
The option which indicates that two objects are in thermal equilibrium is the objects that have the same temperature. Thus, the correct option for this question is B.
What is Thermal equilibrium?Thermal equilibrium may be defined as a state of a system in which all the parts of the system occupy the same temperature. Two or more objects are in thermal equilibrium if there is no net flow of thermal energy or heat between them when they are considerably connected by a path permeable to heat.
The mechanism of thermal equilibrium occurs when a cup of hot coffee is put on the table and after a short period of time, the temperature of the coffee is the same as the surrounding temperature. So, this represents an example of thermal equilibrium.
Therefore, the correct option for this question is B.
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helppppppppppppppppppp
Answer:B
Explanation:As the water heats up the particles will speed up hitting and colliding with each other which makes the water hot
Answer:
A.
B. the speed of the particles will increase because the thermal energy of the water in the beaker increases
B.
B. the water particles got smaller and now take up less space
If a aluminum cube had a mass of 20g and the length of each side was 2cm between what to liquids would it float?
Answer:
density=20/8 g/cc=2.5 g/cc
Mercury is more dense, so aluminum will float on it. Water is less dense, so the aluminum will be below water.
Aluminum will float atop mercury because it is more dense than it. Due to water's lower density, the metal will lie below the surface.
What is density?Density is defined as the measure of how densely a material is packed together.
It can also be defined as the mass of a solid substance per unit volume.
Density is important because it enables us to predict which compounds will float and which will sink in a liquid, density is a crucial notion. As long as an object's density is lower than the liquid's density, it will often float.
The term "density" refers to the relationship between a substance's mass and the volume it takes up in space. The mass, size, and arrangement of an object's atoms influence its density.
Density can be expressed as
Density = mass / volume
There are two types of density.
Absolute densityRelative densityThus, aluminum will float atop mercury because it is more dense than it. Due to water's lower density, the metal will lie below the surface.
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How did max planck contribute to the modern atomic theory?
Answer:
Planck made many contributions to theoretical physics, but his fame rests primarily on his role as originator of the quantum theory. This theory revolutionized our understanding of atomic and subatomic processes, just as Albert Einstein's theory of relativity revolutionized our understanding of space and time
Answer:
revolutionized our understanding of atomic and subatomic processed
what happens when co2 dissolves in water
How many molecules of carbon dioxide and how many molecules of water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)
Answer:
4
Explanation:
water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)
The products of the combustion of hydrocarbon are 4 molecules of carbon dioxide and 8 molecules of water.
What is the combustion reaction?A combustion reaction can be described as a reaction that produces fire and takes place at a high temperature. It is an exothermic reaction as well as a redox reaction that usually takes place between a fuel and mostly oxygen gas.
Examples of Combustion Reactions such as during the combustion of 4 molecules of methane reacting with 8 molecules of oxygen gas to give carbon dioxide and two molecules of water.
[tex]4CH_4 + 8O_2\longrightarrow 8H_2O + 4CO_2[/tex]
Oxygen is the essential reactant for combustion because the combustion is not possible in the absence of oxygen. Complete combustion takes place when a fuel burns completely to produce heat with oxygen and carbon dioxide.
The burning of wood fuels in the presence of air is an example of combustion. The carbon present in wood reacts with oxygen gas in the air to liberate heat and form gaseous products.
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What is a small description of a atom
find the major product
The answer is B.
Back-side attack by water at the more substituted carbon.
You can follow the steps.
Step1: Electrophilic attack forms a bromonium ion intermediates.
Step2: Back-side attack by water at the more substituted carbon opens the bromonium ion intermediates.
Step3: H2O removes a proton from the intermediates.
1. Boiling
2. Opposite
3. Freezing
4. The particles lose energy to the surroundings
5. Condensation
6. B
7. E
8. D
9. A
10. C
That is my question don't liy
highlight main approaches that could be used to investigate the waterer Quality.
Answer:
Seven methods were used to assess water quality in the river system. These methods included single-factor assessment, water quality grading, comprehensive pollution index, the Nemerow pollution index, principle component analysis, fuzzy comprehensive evaluation, and comprehensive water quality identification index.
Acetone [(CH3)2C=O], a simple ketone is commonly used to make products like nail polish remover and paint remover. Draw a picture showing the orbitals involved in the and bonds including its lone pairs.
Carbon and oxygen atoms in (CH3)2C=O form sigma and pi bonds. The pi bonds are formed using unhybridized p orbitals.
Acetone (CH3)2C=O contains the carbonyl group (C=O). Carbon is bonded to oxygen via a double bond as shown in the orbital structure. The carbon atom is also bonded to two methyl groups.
The central carbon atom is sp2 hybridized as well as the oxygen atom in acetone. The pi bond is formed by the overlap of unhybridized p orbitals on both carbon and oxygen atoms. The sigma bonds are formed using the sp2 hybridized carbon atoms on carbon and oxygen.
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What would you name this molecule?
Answer:
H2O is the name of this molecule and it is water
What is volume?
A. The amount of space an object takes up
B. The amount of matter in an object or substance
C. The length of an object
D. The number of particles in an object or substance
Answer:
Volume is the amount of space an object takes up. I hope this helps you! :D
A total solar eclipse occurs because the moon can totally block the sun. If the moon was smaller or farther from earth, a total eclipse
Could occur
Could not occur
Answer:
both
Explanation:
id say that it could occur but also not as much. the moon would be smaller and further from the earth to where we would barely be able to see it. if the full moon is barely visible then im sure the total solar eclipse wouldn't be as noticeable as it is now. but thats just my opinion
Which atom would you expect to have a larger atomic
radius—francium or tennessine?
Answer:
Francium bc it has the largest atomic radius
Francium has the greatest atomic radius. Despite being a highly radioactive metal with a short half-life, francium has little environmental impact.
What is francium?Francium is a chemical element with the atomic number 87 and the symbol Fr. Francium-223, its most stable isotope, has a half-life of only 22 minutes, making it extremely radioactive. It is the second-most electropositive element and the second-rarest naturally occurring element, trailing only caesium.Francium has been used to study atomic structure in addition to being used in chemistry and research. It is used in the diagnosis and treatment of cancer. It is also used in a number of spectroscopic experiments. Despite being a highly radioactive metal with a short half-life, francium has little environmental impact. Francium is created by bombarding radium with neutrons in a nuclear reactor. It is also possible to create it by bombarding thorium with protons.To learn more about francium refer to:
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Pls help I don’t understand: Which of these is a balanced chemical reaction?
A) CO + O2–>CO2
B) CO + 2O2–> 2CO2
C) 2CO + O2—> 2CO2
D) 2CO + 2O*small 2 not 202*—> 2CO2
Answer:
C) 2CO + O₂ → 2CO₂
Explanation:
The equation C is correct.
2CO + O₂ → 2CO₂
This equation have four oxygen atom and two carbon atoms on both side of equation. So it is correctly balanced.
All others are incorrect:
A) CO + O₂ → CO₂
this is incorrect because there are three oxygen atoms on left while two atoms on right.
B) CO + 2O₂ → 2CO₂
this is incorrect because there are five oxygen atoms on left while four atoms on right.
D) 2CO + 2O₂ → 2CO₂
this is incorrect because there are six oxygen atoms on left while four atoms on right.
A car slows to a velocity of 20 m/s and weighs 20 kg. Does the car have momentum? If so, what is the momentum of the car?
Answer:400
Explanation:
20x20
P(momentum)= mxv
Mass times velocity = momentum
Multiple choice (ASAP!)
Answer:
c
Explanation:
oxygen is lost electrons are added in oxidation state is decreased
Answer:
the correct answer is C
hope this helps <3
The change in internal energy for the combustion of cyclohexanol (C6H12O) is -890.7 Kcal per mole. A .708 g sample of cyclohexanol undergoes complete combustion in a bomb calorimeter that has a heat capacity of 2.70 Kcal per degree C. What is the final temperature of the water in the calorimeter if the initial water temperature is 27C?
The final temperature in the calorimeter, with a heat capacity of 2.70 kcal/°C, internal energy for the combustion of cyclohexanol (C₆H₁₂O) of -890.7 kcal/mol and initial temperature of 27°C, is 29.33 °C.
We can find the final temperature of the water in the calorimeter with the following equation:
[tex]\Delta E = -C\Delta T = -C(T_{f} - T_{i})[/tex] (1)
Where:
ΔE: is the change in internal energy for the combustion of C₆H₁₂O = -890.7 Kcal/mol
C: is the heat capacity of the calorimeter = 2.70 Kcal/°C
[tex]T_{f}[/tex]: is the final temperature =?
[tex]T_{i}[/tex]: is the initial temperature = 27 °C
By solving equation (1) for [tex]T_{f}[/tex], we have:
[tex] T_{f} = -\frac{\Delta E}{C} + T_{i} [/tex]
[tex]T_{f} = -\frac{-890.7 \frac{kcal}{mol\: C_{6}H_{12}O}*\frac{1 mol \: C_{6}H_{12}O}{100.158 g \: C_{6}H_{12}O}*0.708 g \: C_{6}H_{12}O}{2.70 kcal/^{\circ}C} + 27 ^{\circ}C = 29.33 ^{\circ}C[/tex]
Therefore, the final temperature of the water is 29.33 °C.
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I hope it helps you!
what is the total amount of energy absorbed by the substance as it completely changes from a solid at 40 degrees to a gas at 200 degrees
Answer:
I don't know the answer sorry man
Element is in group 15. Element Y is in group 17. Both of these elements are
In the compound XY3, there are
shared electron pairs.
Answer:
join id(8606512121) pas(12345)
Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the most likely formula be for the compound formed between Lithium and element X?
Answer:K2X
Explanation: Valency can be defined as the combining power of an element. It is the valency that dictates the value an element will have when writing a chemical formula for its compound.
MgX is a compound of magnesium and an element X. The valency of magnesium in most of its compound is +2. Now for the 2 to have been absent in the chemical formula, this shows that the element X itself have a valency if -2 for the valencies of both to have canceled out.
Now considering the element potassium, it is an alkaline metal belonging to group 1 of the periodic table. Hence, it is expected that it has a valency of +1
Forming a compound with element X means there would be an exchange of valencies between the two. We have established that x has a valency of -2. The formula of the compound thus formed by exchanging the valencies of both element would be K2X
The chemical formula for the compound formed between Lithium and element X is Li₂X.
What is valency?Valency can be described as the combining power of a chemical element. It is the valency that describes the value an element will have in the chemical formula for that compound.
MgX compound is a compound of magnesium and an element X. The valency of magnesium is +2. The chemical formula shows that the element X itself has a valency of -2 which gave a neutral compound.
Now given element is Lithium, it is an alkali metal of group 1 of the periodic table. It has a valency of +1 as it has one electron in its valence shell.
Forming a compound with element X, there will be an exchange of valencies between the two. As element X has a valency of -2. The formula of the formed compound by exchanging the valencies of Lithium and element X would be Li₂X
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On the 14 point pH scale, soaps and cleaning solutions are typically -
Question 7 options:
0-6
8-14
7
Answer:The answer is 8-14
Explanation:It can range from 9-10 or
or above to 14 depending on the amount of leached wood ash(lye) a.k.a potassium carbonate which is an alkalline compound
Answer:
8-14
Explanation:
in which process water partially breaks down into charged particles?
Answer:
presipitayion
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How do Hydrogen-1, Hydrogen-2, and Hydrogen-3 differ from each other?
Answer:
different from the number of their neutrons
Explanation:
They each have one single proton (Z = 1), but differ in the number of their neutrons. Hydrogen has no neutron, deuterium has one, and tritium has two neutrons. ... Their nuclear symbols are therefore 1H, 2H, and 3H. The atoms of these isotopes have one electron to balance the charge of the one proton.
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Answer:
1)
Explanation:
ok this is a write answer
Where is groundwater stored?
Answer:
Answer Below! : )
Explanation:
Groundwater is stored in the tiny open spaces between rock and sand, soil, and gravel. How well loosely arranged rock (such as sand and gravel) holds water depends on the size of the rock particles.
Hope this helps! : )
Answer:
Underground brainliest plz
Explanation:
Muối sunfua với hidro sunfua có giống nhau về tính chất vật lý không ạ. Ứng dụng và điều chế muối sufua như thế nào ạ
the answer is is is is is is is is is is is is is is
