Answer:
[tex]\large \boxed{\text{-92 $^{\circ}$C}}[/tex]
Explanation:
We can use the Ideal Gas Law and solve for T.
pV = nRT
Data
p = 1.25 atm
V = 25.0 L
n = 2.10 mol
R = 0.082 06 L·atm·K⁻¹mol⁻¹
Calculations
1. Temperature in kelvins
[tex]\begin{array} {rcl}pV & = & nRT\\\text{1.25 atm} \times \text{25.0 L} & = & \rm\text{2.10 mol} \times 0.08206 \text{ L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times T\\31.25&=&0.09847T\text{ K}^{-1}\\T& = &\dfrac{31.25}{\text{0.098 47 K}^{-1}}\\\\& = &\text{181 K}\end{array}[/tex]
2. Temperature in degrees Celsius
[tex]\begin{array} {rcl}T & = & (181 - 273.15) \, ^{\circ}\text{C}\\& = & -92 \, ^{\circ}\text{C}\\\end{array}\\\text{The temperature of the gas is $\large \boxed{\mathbf{-92 \, ^{\circ}}\textbf{C}}$}[/tex]
In which state of matter does heat travel fastest and slowest?
Answer:
Heat travels faster in solids.
Heat travels slower in gases.
Explanation:
The state of matter in which heat travels in fastest way is solid and in gaseous state heat travels in slowest way.
What is heat transfer?Heat transfer is a process in which heat can travel from one body to another body or from high temperature to low temperature.
In solid state heat will travel in the fastest way because molecules are arranged very close to each other and heat will travel through conduction process. And in gaseous state heat will travel with slowest way as molecules are arranged in very distance.
Hence in solid, heat travels in fastest way and in gases heat travels in slowest way.
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Four landing sites are proposed for a lander. Data about the
sites are listed in the table.
At which landing site would the lander have the greatest
amount of gravitational potential energy?
Landing Site
w
W
х
Y
Z
Height above
Surface (m)
32
16
35
Acceleration Due to
Gravity (m/s)
1.6
3.7
1.6
3.7
ОХ
OY
12
N
Answer:
The site at which the lander would have the greatest amount of gravitational potential energy is X
Explanation:
The formula for gravitational potential is given as follows;
[tex]PE_G = m \times g \times \Delta H[/tex]
Where:
g = Acceleration due to gravity
m = Mass of the lander
ΔH = Height above surface
Landing site --- Height above surface --- Acceleration due to gravity
W 32 1.6
x 16 3.7
Y 35 1.6
Z 12 3.7
Therefore, we have;
For site W
[tex]PE_G = m \times 1.6 \times 32 = 51.2 \cdot m[/tex]
For site X
[tex]PE_G = m \times 3.7 \times 16= 59.2 \cdot m[/tex]
For site Y
[tex]PE_G = m \times 1.6 \times 35 = 56 \cdot m[/tex]
For site Z
[tex]PE_G = m \times 3.7 \times 12 = 44.4 \cdot m[/tex]
Hence the site at which the lander would have the greatest amount of gravitational potential energy is X with [tex]PE_G[/tex] = 59.2·m.
Gravitational energy is the power stored in an object due to the intensity of gravity or because the article is located vertically.
The correct answer is:
The site at which the lander would have the greatest amount of gravitational potential energy is X.
The correct explanation for site X is:
The gravitational energy can be calculated as the product of mass, gravitational field and height.
[tex]{\text{PE}_{\text G}&= \text{m}\; \times\text g\times \Delta\text H[/tex]
Where,
g = acceleration due to gravitym = mass
h = height
Given,
Landing site Height above surface Gravity
W 32 1.6
X 16 3.7
Y 35 1.6
Z 12 3.7
We can calculate Gravitational energy for all the sites as follows:
Site W:[tex]{\text{PE}_{\text G}&= \text{m}\; \times\ 1.6\times 32 = 51.2 \text \; \times \text {m}[/tex]
Site X:[tex]{\text{PE}_{\text G}&= \text{m}\; \times\ 3.7\times 16 = 59.2 \text \; \times \text {m}[/tex]
Site Y:[tex]{\text{PE}_{\text G}&= \text{m}\; \times\ 1.6\times 35 = 56 \text \; \times \text {m}[/tex]
Site Z:[tex]{\text{PE}_{\text G}&= \text{m}\; \times\ 3.7 \times 12= 44.4 \text \; \times \text {m}[/tex]
Therefore, the greatest amount of gravitational energy 59.2m is present on-site X.
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How did Robert Whitaker change dassification?
Answer:
created an organizational hierarchy
Explanation:
What is sodium bicarbonate an example of? a buffer an acid a liquid a base
Answer:
base
Explanation:
carbonic acid - H2CO3 - is a weak acid. Therefore, HCO3 itself is its conjugate base. The Na(sodium) ion is neutral.
This means that NaHCO3 is a base. (a weak one)
Tyler measured the force of his grip. Which is the most likely reading?
A.
190kg
B.
190N
C.
1 lb
D.
20,000 N
E.
5 seconds
F.
18mg
Answer:
190n
Explanation:
190 190 and because it is easy to understand if you didn't understand my answer ask any man
Which group in the periodic table contains the three elements with the highest
electrical conductivities?
OA) Group 8
B) Group 12
C) Group 11
D) Group 7
Answer:
Group 12
Explanation:
Group 12 is also called a transition metal group. This group in the periodic table lies in between the groups or tables. These metals are classified as the transition metal in the table.
These metals are found from the group number 3 to 12. In the periodic table, These transition elements are ductile and malleable. These metal conduct heat and electricity.
These elements are generally called dense and less to react to the alkaline metal. Iron, copper-silver, gold is the most important transition metal.
Answer:
Group 11
Explanation:
Pf
Can the pH scale be utilized for all acids (Arrhenius, Bronsted-Lowry, and Lewis)? Give examples of substances from each definition category that can/cannot use the pH scale and explain your reasoning.
PLEASE ANSWER
Answer:
No
Explanation:
The pH scale is a scale graduated from 0-14 which shows the degree of acidity of alkalinity of a substance. The pH scale is graduated in such a way that 0-6.9 indicates acidity, 7.0 indicate a neutral substance, while a pH of 8-14 indicates alkalinity respectively.
There are three main definitions of acids/bases
- Arrhenius definition
-Brownstead-Lowry definition
-Lewis definition
Arrhenius explains acids as any substance that produces hydrogen ions as its only positive ion in solution while a base produces hydroxide ions as its only negative ion in solution. The pH scale is based on corresponding values of pH derived from aqueous solutions of these substances.
However, not all acids/bases produces hydrogen or hydroxide ions in solution. Brownstead-Lowry definition of acids and Lewis definition of acids could be extended to nonaqueous media where the pH can not be measured as there are no hydrogen or hydroxide ions present in the solution.
This implies that pH measurement may not apply to acids/bases in the all the categories of acids/bases hence it can not be utilized for all acids and bases.
Arrhenius - sodium carbonate
Brownstead-Lowry - concentrated HF
Lewis acid - AlCl3
Which if the following matters occupies more space, assuming similar number of molecules? A.(Solid) B.(Liquid) C.(Gas) D. (Solid and gas)
Balance the equation.
SiO2 +
CaC2 →
Si +
CaO +
CO2
Answer:
5SiO[tex]_{2}[/tex] + 2CaC[tex]_{2}[/tex] → 5Si + 2CaO + 4CO[tex]_{2}[/tex]
5 2 5 2 4 are your answers.
In an electrolytic cell, which ion would migrate
through the solution to the negative electrode?
(1) a chloride ion
(3) a bromide ion
(2) a silver ion
(4) a fluoride ion
Answer:
Silver ion
Explanation:
In an electrolytic cell, the positive ions known as the cations migrate to the negative electrode, the cathode where they accept electrons to become discharged as neutral atoms. Also, the negative ions known as the anions migrate to the positive electrode, the anode, where they give up their electrons to become discharged as neutral atoms.
From the question above, the only positive ion among the options given is the silver ion, Ag+, therefore, it is the correct option.
-pls help will mark brainliest-
Answer:
Explanation: d
Which of the following is an example of frontier research?
A. Investigating how organisms are made of cells.
B. Testing the electrical resistance of different materials.
C. Discovering the nature of dark matter.
D. Researching how animals on the Great Plains interact.
Answer:
B. Testing the electrical resistance of different materials.
Explanation:
An example of frontier research is " Testing the electrical resistance of different materials".
What is frontier research?A frontiers Research Topic offers researchers the chance to present various viewpoints, approaches, and findings on a new or developing topic in a forum monitored by experts in the area but also published in a complete open-access journal.
What is electrical resistance?Electrical resistance towards the current stream within an electrical circuit is measured by resistance. The Greek letter omega (ω) stands for ohms, which are used to evaluate resistance.
Therefore, the correct answer will be an option (B).
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Condensation refers to the process when
A gas turns to a liquid
A liquid turns to a gas
A liquid turns to a solid
A solid turns to a liquid
Answer:
A Gas turns to a liquid
Explanation:
The lifting force on an airplane's wing does which of the following?
O A. Increases gravity
O B. Increases with speed
O C. Decreases with speed
D. Overcomes drag
The lifting force on an airplane's wing Increases with speed.
What is lifting force?The lifting pressure, lifting force, or virtually lift is the sum of all of the forces on a body that forces it to transport perpendicular to the route of flow.
Drag and Thrust are all “mechanical forces.” A mechanical force is generated through the interplay between an item and a fluid (liquid or gas). Weight is a “field force.” A subject's pressure no longer has to be in physical contact with the item to have an impact on the object.
The lift equation states that carry L is identical to the carry coefficient Cl times the density r times half of the velocity V squared instances the wing region A. For given air conditions, form, and inclination of the item, we have to decide a value for Cl to determine the raise.
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Which set of phrases best lists the characteristics of asexual reproduction?
one parent, offspring are not identical to the parent
one parent, offspring are identical to the parent
two parents, offspring are not identical to the parents
two parents, offspring are identical to the parents
I need this answer fast ASAP.
Answer:
one parent, offspring are identical to the parent
Explanation:
Answer:
one parent, offspring are identical to the parent
Explanation:
asexual reproduction is a form of reproduction that does not require two gametes to fuse. Asexual reproduction results in offspring that are known as stable clones, meaning that their genetic makeup is stable and doesn't change between generations
During chemical reactions the bonds between atoms break and new bonds form.
Energy must be absorbed to break a bond, so breaking bonds is endothermic.
Making new bonds is exothermic because energy is released.
a) When green copper carbonate decomposes, the equation is:
CuCO3 CuO CO2
copper carbonate copper oxide carbon dioxide
Is the reaction exothermic or endothermic? Use ideas about bonds to explain why.
Answer:
The equation is CuCO₃ ⇆ CuO + CO₂. So it's a decomposition reaction, so a solid broke down into two other substances. This means that bonds were broken, so the reaction must be endothermic.
Can a compound have more than one carbon-carbon double bond in it?
Answer:
yes, a compound can have more than one carbon-carbon double bond
polarity of the molecules increase with electro nogativity
Answer:
true
Explanation:
polarity of the molecules increased with electronegatiy it's true
calculate the ph and poh of a 0.0032 M solution of nitric acid NHO3
Answer:
HNO3 ->NO3²- + H+
Concentration of H+ ions= 0.0032M
pH = - log[ H+]
= - log (0.0032)
= 2.49
pH + pOH = 14
pOH = 14 - pH
= 14 - 2.49
= 11.51
pH = 2.49 and pOH = 11.51
Hope this helps.
an 80kg skateboard moving at 3m/s pushes off with her back foot to move faster. If her velocity increases to 5 m/s, what is her change in kinetic energy as a result
Write Fe salts (divalent Fe)?
Pleasee help.... I will mark the answer with brainlist.
Answer:
Graphitic carbon nitride (g-C3N4) is a rising two-dimensional material possessing intrinsic semiconducting property with unique geometric configuration featuring superimposed heterocyclic sp2 carbon and nitrogen network, nonplanar layer chain structure, and alternating buckling. The inherent porous structure of heptazine-based g-C3N4 features electron-rich sp2 nitrogen, which can be exploited as a stable transition metal coordination site. Multiple metal-functionalized g-C3N4 systems have been reported for versatile applications, but local coordination as well as its electronic structure variation upon incoming metal species is not well understood. Here we present detailed bond coordination of divalent iron (Fe2+) through micropore sites of graphitic carbon nitride and provide both experimental and computational evidence supporting the aforementioned proposition.
describe an experiment to show water is an oxide to hydrogen
Answer:
2H + O -------> H2O
and hydrogen react with oxygen so it is oxide of hydrogen
like iron react with Oxygen and give
iron oxide
Explanation:
after passing electric current in the water the two gases will get seperated and on bringing the matchstick close to hydrogen it will burn with a pop sound
How many moles are in 1.5L of 0.40M Na2SO4?
Answer:
0.60 moles of Na₂SO₄
Explanation:
Molarity is an unit of concentration defined as the ratio between moles of solute and liters of solution.
A solution of Na₂SO₄ 0.40M contains 0.40 moles of solute (Na₂SO₄) per liter of solution.
As you have 1.5L of solution, moles of Na₂SO₄:
1.5L × (0.40mol / L) = 0.60 moles of Na₂SO₄
What is h2OO??????????
which of the following causes tornadoes?
Answer:
Tornadoes form when warm, humid air collides with cold, dry air.
Explanation:
The denser cold air is pushed over the warm air, usually producing thunderstorms. The warm air rises through the colder air, causing an updraft. The updraft will begin to rotate if winds vary sharply in speed or direction.
// have a great day //
Answer:
your question says of the following but their isn't any of the following ):
Explanation:
But other than than that person right up above
to well
Which of the
of the following is a way to use
water economically
a construction of bewris
b Rainwater harvesting
c Drup irrigation
d Infitration
Answer:
c Drup irrigation
Explanation:
Hope it helps you.
Plz mark as brainliest plz.
Balance the reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1." 2AgNO₃ + MgCl₂ 2AgCl + Mg(NO₃)₂
Answer:
The balanced equation is: 2AgNO₃ + MgCl₂ ------> 2AgCl + Mg(NO₃)₂
Explanation:
The law of conservation of mass states that in a normal chemical reaction, matter is neither created nor destroyed.
According to the law of conservation of mass, therefore, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants. This implies that the amount of the atoms in each element in the chemical reaction remains the same before and after the reaction. A balanced chemical equation therefore, is one that shows that the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.
Considering the given reaction:
2AgNO₃ + MgCl₂ ------> 2AgCl + Mg(NO₃)₂
The amount in moles of each atom in the reaction is as follows;
Ag = 2 moles of atom on each side
N = 2 moles of atoms on each side
O = 6 moles of atoms on each side
Mg = 1 mole of atoms on each side
Cl = 2 moles of atoms on each side
Therefore, the above chemical equation is balanced.
Answer:
The equation is already balanced.
Explanation:
An investigation involves determining which metal is better for making pots that will cook food faster.
Two atoms bonded together will remain some distance apart, minimizing the Question 1 options: A) potential energy of the bond. B) bond distance. C) number of valence electrons in the bond. D) partial charge of the bond. Question 2 (5 points) BeH2 has no lone pairs of electrons. What's the structure of this molecule? Question 2 options: A) Tetrahedral B) Bent C) Octahedral D) Linear Question 3 (5 points) In KCl, how are the valence electrons distributed? Question 3 options: A) The electrons are transferred from K to Cl. B) The electrons are unequally shared between K and Cl, forming a polar covalent bond. C) The electrons are shared between many K and Cl ions, creating a "sea of electrons." D) The electrons are equally shared between K and Cl, forming a covalent bond. Question 4 (5 points) Chlorine can bond with fluorine to form ClF. Chlorine can also bond with lithium to form LiCl. Which compound will have a greater partial charge? Question 4 options: A) Both compounds will have the same partial charge. B) ClF C) LiCl D) Neither compound will have partial charge. Question 5 (5 points) Which of the following elements will not form a polar covalent bond with oxygen? Question 5 options: A) Hydrogen B) Oxygen C) Sodium D) Fluorine Which process is used to produce gases from solutions of salts dissolved in water or another liquid? Question 6 options: A) Electrolysis B) Polar covalent bonding C) Ionic bonding D) Metallic bonding Question 7 (5 points) Saved A chemical reaction has the equation AgNO3 (s) + NaCl (s) → AgCl (s) + NaNO3 (s). What type of reaction occurs between AgNO3 and NaCl? Question 7 options: A) Decomposition B) Double displacement C) Single displacement D) Synthesis
Answer:
1) potential energy of the bond.
2) Linear
3) The electrons are transferred from K to Cl.
4) ClF
5) Oxygen
6) Electrolysis
7) Double displacement
Explanation:
As two atoms approach each other in a bonding situation, the potential energy of the bond is minimized as the internuclear distance of the bonding atoms decreases.
BeH2 has two electron domains and the central beryllium atom is sp2 hybridized. According to valence shell electron pair repulsion theory. A molecule having two regions of electron density will lead to a linear molecule.
KCl is an ionic compound hence there is a transfer of electrons from K(metal) to Cl(nonmetal).
ClF has partial charges because it contains a polar covalent bond. The partial charges arise from the dipole within the molecule. LiF is a pure ionic compound formed by transfer of electrons from Li to F. The species possess full and not partial charges.
When an oxygen atom bonds with another oxygen atom, what has been formed is a homonuclear covalent bond. Since the electro negativity of the both atoms is exactly the same, a pure covalent bond is formed. Recall that polar covalent bonds are formed when there is a significant electro negativity difference between the bonding atoms.
When direct current is passed through certain salt solutions during electrolysis, gases may be evolved and collected at the appropriate electrodes.
A double-replacement reaction is a reaction in which the cations and anions present in two different ionic compounds that are reacting together exchange their positions to form two new compounds on the product side. For instance, look at the reaction shown in question 7 as a typical example of this;
AgNO3 (s) + NaCl (s) → AgCl (s) + NaNO3 (s).
what is electrolysis
Answer:
electrolysis is a technique that uses a direct electric current to drive an otherwise non-spontaneous chemical reaction
Explanation: