Answer:
[tex]\Delta s=-23.0\frac{J}{mol*K}[/tex]
Explanation:
Hello!
In this case, since the entropy change when an ideal gas undergo both a volume and temperature change is computed by:
[tex]\Delta s =Cp*ln(\frac{T_2}{T_1} )-R*ln(\frac{P_2}{P_1} )[/tex]
Whereas the molar Cp is 20.786 J/(mol*K) and the final pressure is computed via the Boyle's law:
[tex]P_2=\frac{1.00atm*500cm^3}{50cm^3}=10 atm[/tex]
Thus, we plug in the data (temperatures in Kelvin) to obtain:
[tex]\Delta s =20.786\frac{J}{mol*K} *ln[\frac{(-25+273)K}{(25+273)K} ]-8.3145\frac{J}{mol*K}*ln(\frac{10atm}{1atm} )\\\\\Delta s=-23.0\frac{J}{mol*K}[/tex]
Best regards!
Please Hurry
How is thermal energy transferred during conduction? Check all that apply.
Thermal energy is transferred between particles that are not touching each other.
Thermal energy is transferred between particles that are in direct contact with each other.
Thermal energy is transferred between objects of different temperatures.
Thermal energy is transferred between objects of the same temperature. Thermal
energy is transferred from slow-moving particles to fast-moving particles. Thermal
energy is transferred from fast-moving particles to slow-moving particles.
Answer:
B,C,F
Explanation:
Answer:
b c f
Explanation:
Lila is a track and field athlete. She must complete four laps around a circular track. The track itself measures 400 meters from start to finish and the race took her 6 minutes to complete.
Which best describes her speed and velocity?
Her speed is 4.4 m/s, and her velocity is 0 m/s.
Her speed is 1.1 m/s, and her velocity is 0 m/s.
Her speed is 0 m/s, and her velocity is 2400 m/s.
Her speed is 4.4 m/s, and her velocity is 4.4 m/s.
Answer:
Her speed is 1.1 m/s, and her velocity is 0 m/s.
Explanation:
Hello!
In this case, since the speed is the defined as the distance traveled over the elapsed time:
[tex]s=\frac{d}{t}[/tex]
And the velocity is defined as the change in displacement over the time interval:
[tex]v=\frac{\Delta d}{\Delta t}[/tex]
Thus, since the total distance traveled was 400 m and the total time 6 mins (360 s), we compute the speed as:
[tex]s=\frac{400m}{360s}=1.1m/s[/tex]
And the velocity is 0 m/s because the initial point is the very same final point as the track was circular. Therefore the answer is Her speed is 1.1 m/s, and her velocity is 0 m/s.
Best regards!
At what temperature does ice start to melt
Answer:
Explanation:
The answer is 32°F or 0° Celsius.
Hope it helped you.
What is the mass of Silver in 3.45g AgS?
Answer:
Mass = 2.59 g
Explanation:
Given data:
Mass of AgS = 3.45 g
Mass of silver = ?
Solution:
Number of moles of AgS:
Number of moles = mass/molar mass
Number of moles = 3.45 g/ 139.93 g/mol
Number of moles = 0.024 mol
1 mole of AgS contain 1 mole of Ag.
0.024 mol contain 0.024 mol of Ag.
Mass of silver:
Mass = number of moles × molar mass
Mass = 0.024 mol × 107.86 g/mol
Mass = 2.59 g
PLEASE HELP IM TIMED create an analogy for the motion of atoms in solids,
liquids, and gases, so she compared them to marbles
in a tray
A solid is like the tray being shaken and the manies
moving around it, and a liquid is like the tray being
shaken slowly and all the marbles moving in their
positions
A solid is like the tray being shaken slowly and all
the marbles moving in their positions, a liquidi is like
the tray being shaken and the marbles moving
around it, and a gas is like the tray being shaken
hard and the marbles moving vigorously around it.
A gas is like the tray being shaken slowly and all the
marbles moving in their positions, and a solid is like
the tray being shaken hard and the marbles moving
vigorously around it
Aliquid is like the tray being shaken hard and the
marbles moving vigorously around it and a gas is
like the tray being shaken slowly and all the marbles
moving in their positions.
Markthisandretum
Save and Exit
Isopropyl alcohol (c3h7OH) burns in air according to this equation:
2C3H7OH + 9O2 -> 6CO2 + 8H2O
a) calculate the moles of oxygen needed to react with 3.40 mol C3H7OH
b) find the moles of each product formed when 3.40 mol C3H7OH reacts with oxygen
Answer:
a) 15.3 mol O₂
b) 10.2 mol CO₂; 13.6 mol H₂O
Explanation:
Step 1: Write the balanced equation
2 C₃H₇OH + 9 O₂ ⇒ 6 CO₂ + 8 H₂O
Step 2: Calculate the moles of O₂ that react with 3.40 moles of C₃H₇OH
The molar ratio of C₃H₇OH to O₂ is 2:9. The moles of O₂ required are 9/2 × 3.40 mol = 15.3 mol
Step 3: Calculate the moles of CO₂ produced from 3.40 moles of C₃H₇OH
The molar ratio of C₃H₇OH to CO₂ is 2:6. The moles of CO₂ produced are 6/2 × 3.40 mol = 10.2 mol
Step 4: Calculate the moles of H₂O produced from 3.40 moles of C₃H₇OH
The molar ratio of C₃H₇OH to H₂O is 2:8. The moles of H₂O produced are 8/2 × 3.40 mol = 13.6 mol
What causes your vocal cords to vibrate a)mucas b)air c)chemicals
Answer:
air
Explanation:
Vocal folds vibrate when excited by aerodynamic phenomena; they are not plucked like a guitar string. Air pressure from the lungs controls the open phase. The passing air column creates a trailing “Bernoulli effect,” which controls the close phase.
Sodium chloride can be produced by the reaction of sodium metal with chlorine gas. Which is the limiting reactant if 6.70 moles of Na reacts with 3.20 moles of chlorine gas
Answer:
Chlorine gas.
Explanation:
Hello!
In this case, the undergoing chemical reaction is:
[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]
Thus, given the moles of reacting both sodium and chlorine, we compute the moles of sodium chloride yielded by each reactant by considering the 2:2 and 1:2 mole ratios:
[tex]n_{NaCl}^{by\ Na}=6.70molNa*\frac{2molNaCl}{2molNa}=6.70molNaCl \\\\n_{NaCl}^{by\ Cl_2}=3.20molCl_2*\frac{2molNaCl}{1molCl_2}=6.40molNaCl[/tex]
Thus, since chlorine yields less moles of sodium chloride, we infer it is the limiting reactant.
Best regards!
Write net ionic equations for the reaction that occurs when aqueous solutions of Lithium hydroxide, LiOH, with hydrobromic acid, HBr, undergo a neutralization reaction that produces salt and water.
Answer:
OH⁻(aq) + H⁺(aq) ⇒ H₂O(l)
Explanation:
Let's consider the molecular equation that occurs when aqueous solutions of lithium hydroxide and hydrobromic acid undergo a neutralization reaction.
LiOH(aq) + HBr(aq) ⇒ LiBr(aq) + H₂O(l)
The complete ionic equation includes all the ions and the molecular species.
Li⁺(aq) + OH⁻(aq) + H⁺(aq) + Br⁻(aq) ⇒ Li⁺(aq) + Br⁻(aq) + H₂O(l)
The net ionic equation includes only the ions that participate in the reaction and the molecular species.
OH⁻(aq) + H⁺(aq) ⇒ H₂O(l)
The ratio molecular mass of gas A and B is 1.25 calculate the ratio of rate of diffusion of the gases
Answer:
i will tell your teacher that u uding online cheats to answer yout homeworks hhaahaha
Explanation:
good luck brooo hahahha
please explain the flow of energy through a food web, and please explain the flow of matter through a food web
Answer: ENERGY: A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another; the levels in the food chain are producers, primary consumers, higher-level consumers, and finally decomposers. These levels are used to describe ecosystem structure and dynamics.
MATTER: When one organism eats another, the matter, or carbon, nitrogen, and other essential elements, are transferred from one to the other. These elements move from the producers, to the consumers, and eventually to the decomposers, cycling the matter through the ecosystem.
Explanation: look up
What happens when the sunspots rotate?
Answer:
Over time, the Sun's differential rotation rates cause its magnetic field to become twisted and tangled. The "tangles" in the magnetic field lines can produce very, very strong localized magnetic fields. Places where "ropes" of bundled field lines "break" the surface of the Sun are active regions where sunspots form.
Which of the following is the number of hydrogen atoms in a mole of hydrogen gas
at STP?
a) 224
b) 6,02 x 1023
c) 1,20 x 1024
d) 2.016
e) 1.008
PLEASE HELP ILL GIVE U BRAINLIEST
What's something you learned about the periodic table
Answer:
The periodic table of elements puts all the known elements into groups with similar properties. This makes it an important tool for chemists, nanotechnologists, and other scientists. If you get to understand the periodic table and learn to use it, you'll be able to predict how chemicals will behave.
Answer:
Okayy
Explanation:
The periodic table arranges the chemical elements
All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods
It have many properties. Each column is called a group.
ALSO Metals are placed on the left-hand side of the periodic table , and non-metals on the right.
Metalloids can also be called semimetals. On the periodic table, the elements colored yellow, which generally border the stair-step line, are considered to be metalloids.
What is the term used to describe a phase change from liquid to solid?
When a liquid changes into a solid, it is called solidification. When a gas changes into a solid, it is called deposition . When a liquid changes into gas, it is called evaporation. Phase changes are usually caused by changes in temperature or pressure.
Do you think more chemical reactions that occur in the human body are endothermic or exothermic? Justify your answer.
Answer:
Exothermic
Explanation:
We as humans do not absorb heat. A good way to think about it is that when we workout we use energy from our body which causes our body temperature to rise. The energy used from food maintains our blood, respiration, and other systems in optimal condition. This requires energy from our body which ends up leaving the body as heat.
Your friend uses a wire coil to model how a sound wave moves. What is an advantage to using
the spring coil as a model?
(10 Points)
A. The model increases the complexity of the wave.
B. The model shows the wave more quickly.
C. The model can be measured much more accurately.
D. The model can be observed from the classroom more easily.
Answer:
D. The model can be observed from the classroom more easily
Explanation:
From the concept of using wire coil to model and the concept of using spring coil to measure, we can come to the conclusion that the correct answer is Option D.
i don’t understand this lolz help
Explanation:
In fluorine
protons = 9
Neutrons = 10
Electrons = 9
Hope it will help :)❤
sodium combines with water to produce a sodium hydroxide and hydrogen gas. which word equation respresents this violent reaction?
Answer:
Na(s) + H₂O (l) → NaOH(aq) + H₂(g).
Explanation:
answer is this thank you I hope it helps you pls like
Matter is composed of exceedingly small particles called atoms. An atom is the smallest unit of an element that can participate in a _______. A macroscopic sample of an element contains an incredibly large number of atoms, all of which have identical _______. Atoms of one element differ in properties from atoms of all other elements. A compound consists of atoms of two or more elements combined in a _______. Atoms are neither _______ during a chemical change; they're instead rearranged to yield substances that are different from those present before the change.
Answer: 1) chemical change 2) chemical properties 3) ratio? 4) created nor destroyed
Explanation: 1) Matter is composed of exceedingly small particles called atoms. An atom is the smallest unit of an element that can participate in a chemical change. 2) A macroscopic sample of an element contains an incredibly large number of atoms, all of which have identical chemical properties. 3) A compound consists of atoms of two or more elements combined in a small, whole-number ratio. In a given compound, the numbers of atoms of each of its elements are always present in the same ratio. 4) Atoms are neither created nor destroyed during a chemical change, but are instead rearranged to yield substances that are different from those present before the change
What is the overall voltage for the nonspontaneous redox reaction involving
Mg and Cu and their ions?
A. 0.34 + (-2.37)
B. -2.37 - 0.34
C. 2.37 - 0.34
D. 0.34 +2.37
SUBMIT
Answer: B -2.37 -0.34
Explanation: A P E X
The redox reaction consists of the reduction and the oxidation halves and involves the transfer of electrons. The overall voltage for the Mg and Cu is 0.34 - (-2.37). Thus, option C is correct.
What is a nonspontaneous redox reaction?A nonspontaneous redox reaction is the loss and gain of the electrons when an external source of voltage is applied to initiate the electrochemical reaction.
The overall voltage of the redox reaction can be given by the oxidation and the reduction of half of the cell as,
Oxidation half: Mg(s) → Mg₂⁺ + 2e⁻ E° = -2.37 v
Reduction half: Cu₂⁺ + 2e⁻ → Cu(s) E° = + 0.34 v
The overall voltage of the cell (E° cell) is calculated as,
E° cell = E°(reduction) - E°(oxidation)
= +0.34 - (-2.37)
= 2.71 v
Therefore, option C. 0.34 - (-2.37) is the overall voltage for the nonspontaneous redox reaction.
Learn more about redox reaction here:
https://brainly.com/question/14217644
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Your question is incomplete, but most probably your full question was, What is the overall voltage for a redox reaction with the half-reactions Mg(s) → Mg₂⁺ + 2e⁻ and Cu₂⁺ + 2e⁻ → Cu(s)?
A. -2.37 - 0.34
B. 0.34 - 2.37
C. 0.34 - (-2.37)
D. 2.37 - 0.34
1. How does the tendency of metal atoms to
lose valence electrons explain the periodic trends
of properties found in representative metal
elements
Explanation:
The tendency of metals to lose electrons is a measure of their electropositivity or metallicity.
Electropositivity is a measure of the tendency of atoms of an element to lose electrons. It is closely related to ionization energy and electronegativity of an element.
The lower the ionization energy of an element, the more electropositive or metallic an element is. Across a period, from left to right, electropositivity or metallicity decreases and from top to down a group, it increases. Metals are found on the left of the periodic table.Ashley is preparing for a speech about the tentacular feeding pattern of the corals. Help her complete the sentences. Corals have tentacles near the oral opening. The tentacles comprise cells called . These cells contain used by corals to sting the prey and stun them using the tentacles.
Answer:
Stinging cell, nematocysts.
Explanation:
Corals have tentacles present near the oral opening. The tentacles comprise cells called stinging cells. These cells contain nematocysts used by corals to sting the prey and stun them using the tentacles. These stinging cells present near the mouth which contains nematocysts that is an organelle that produces toxic substances used by the coral to catch their prey.
The formula mass of HC2H302 is
1.
59
2.
60
3.
72
4.
80
Answer:
60
Explanation:
The formula of the compound is given as:
HC₂H₃O₂
To find the formula mass we sum up the atomic masses of the component elements;
Atomic mass:
H = 1
C = 12
O = 16
HC₂H₃O₂ = 1 + 2(12) + 3(1) + 2(16)
= 1 + 24 + 3 + 32
= 60
What is the mass of 5.2 x 10^21 atoms of Vanadium?
Answer:
Mass = 0.44 g
Explanation:
Given data:
Mass of vanadium = ?
Number of atoms of vanadium = 5.2 × 10²¹ atoms
Solution:
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
5.2 × 10²¹ atoms × 1mol / 6.022 × 10²³ atoms
0.86× 10⁻² mol
0.0086 mol
Mass of vanadium:
Mass = number of moles × molar mass
Mass = 0.0086 mol × 50.9 g/mol
Mass = 0.44 g
iodid ion is oxidized to hypoiodite ion by permanganate what is the ratio of hydroxide ions to iodide ions in balanced equation
Answer: The ratio of number of hydroxide ions to iodide ions is 2 : 1.
Explanation:
The chemical equation for the oxidation of iodide ion is oxidized to hypoiodite ion by permanganate follows:
[tex]2MnO_4^-+I^-+H_2O\rightarrow 2MnO_2(s)+IO_3^{-}+2OH^{-}[/tex]
According to mole concept:
1 mole of a substance contains [tex]6.022\times 10^{23}[/tex] number of particles
Moles of iodide ions = 1 mole
Number of iodide ions = [tex](1\times 6.022\times 10^{23}[/tex]
Moles of hydroxide ions = 2 mole
Number of hydroxide ions = [tex](2\times 6.022\times 10^{23}[/tex]
Taking the ratio of number of hydroxide ions and number of iodide ions are as follows:
[tex]\frac{\text{Number of hydroxide ions}}{\text{Number of iodide ions}}=\frac{(2\times 6.022\times 10^{23})}{(1\times 6.022\times 10^{23})}\\\\\frac{\text{Number of hydroxide ions}}{\text{Number of iodide ions}}=\frac{2}{1}[/tex]
Hence, the ratio of number of hydroxide ions to iodide ions is 2 : 1.
interconic attraction theory states what
Explanation:
Interionic Attractions are when an ion is surrounded by an ionic atmosphere which has a net charge opposite for its own. ... The ionic atmosphere cannot created nor destroyed. In solutions with weak electrolytes the number of ions is not large, therefore the effect of the interionic attraction is small.
Hope this is fine for you Predict the Product
C6H12O6 → ______ + ___________
C6H12 + O2 → _______ + __________
Answer:
Answers with detail are given below.
Explanation:
C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂
Anaerobic respiration in plants produced ethanol which if accumulate then cause the harmful effect in plants. It is also occur in some microorganisms such as yeast.
C₆H₁₂O₆ → 2C₃H₆O₃
Anaerobic respiration in animals pyruvate converted into lactic acid and it is not as harmful as ethanol in plant if accumulate. It is produced during exercise. It can produce the cramps which can be cured with massage.
C₆H₁₂ + O₂ → CO₂ + H₂O
This reaction is the combustion reaction of cyclohexane. Cyclohexane burnt in the presence of oxygen and form water and carbon dioxide.
hellpppp plzzzzz its 100 points read the file plzzzzz and i give brainliest answerrr asaaap pllzzz
sasha from aot died :(
Answer:
yeesss. I am sooooo ssaaaddddd
Answer:
Yes and her last word was meat
Explanation:
Sasha supremacy