Answer:
E
Explanation:
The simple rule of thumb is that as the atomic or molar mass of an atom increases, the entropy increases. This means that more the mass more will be entropy.
The atomic mass of various elements is as follows
Ne = 20 g/mol
Xe = 131 g/mol
He = 4 g/mol
Ar = 40 g/mol
Kr = 84 g/mol
Therefore, the order of increasing entropy must be
He<Ne<Ar<Kr<Xe.
Hence, option E is the correct answer.
2L of hydrogen has an initial pressure of 750 mmHg, what is the final pressure in mmHg if the volume increases to 20 L with a constant temperature of 37 degrees C?
Answer: The final pressure is 75 mm Hg.
Explanation:
According to Boyle's law, at constant temperature the pressure of a gas in inversely proportional to volume.
Since, it is given that the temperature is constant. Hence, formula used is as follows.
[tex]P_{1}V_{1} = P_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]P_{1}V_{1} = P_{2}V_{2}\\750 mm Hg \times 2 L = P_{2} \times 20 L\\P_{2} = \frac{750 mm Hg \times 2 L}{20 L}\\= 75 mm Hg[/tex]
Thus, we can conclude that the final pressure is 75 mm Hg.
Andrea is making a poster to show how the nervous system uses signals to send information through the body. These signals are sent through nerves. What parts should Andrea include in her diagram of a nerve as evidence to support her explanation?
neurons only
neurons, axons, and dendrites
dendrites, blood vessels, and muscle cells
axons, blood vessels, and connective tissue
Answer:b
Explanation:
Ito ang web browser na kapalit ng Internet Explorer! plsssss help naman ako epp po ito hindi ko po alam
Answer:
p o e t i c o
Explanation:
no lo entenderias
which shows a disaccharide
Answer: It is :B:
Explanation: also sub to technoblade
Question 2 (1 point)
An object's gravitational force depends primarily on the object's
a
density
mass
b
oc
momentum
Answer: An object's gravitational force depends primarily on the object's mass.
Explanation:
According to the Universal law of gravitation, every object whether is it is having large r small mass tends to exert a force on every other object, therefore this force is known as gravitational force.
Formula to calculate gravitational force is as follows.
[tex]F = \frac{G \times m_{1} \times m_{2}}{r^{2}}[/tex]
where,
F = Gravitational force
G = Gravitational constant = [tex]6.674 \times 10^{-11} m^{3}/kg s^{2}[/tex]
[tex]m_{1}[/tex] = mass of object 1
[tex]m_{2}[/tex] = mass of object 2
r = distance between the centers of the objects
Therefore, it means that gravitational force of an object primarily depends on an object's mass.
Thus, we can conclude that an object's gravitational force depends primarily on the object's mass.
Calculate the maximum work available from 50.0 g of aluminum in the following cell when the cell potential is 1.15 V. Al(s) |Al3+(aq) || H+(aq) | O2(g) |Pt. Note that O2 is reduced to H2O.
Answer:
W = 615.91 kJ
Explanation:
We need to use the following expression:
W = ΔG° * mol (1)
But in order to determine the ΔG° we need the following expression:
ΔG° = -n * F * E° (2)
Where F is a constant and is 96,500 J/V mol
n is the number of transferred electrons in the reaction. As we are passing from Al to Al³⁺ we can say that the number of electrons are 3.
Finally to get the moles, we need the the atomic weight of aluminum which is 26.98 g/mol, so the moles:
moles = m/MM (3)
Let's calculate the moles of aluminum:
moles = 50 / 26.98 = 1.85 moles of aluminum
Now let's calculate the gibbs energy using (2):
ΔG° = -3 * 96,500 * 1.15
ΔG° = -332,925 J or simply -332.925 kJ/mol
Finally, using (1) we can determine the work done:
W = 332.925 * 1.85
W = 615.91 kJHope this helps
The maximum work available from 50.0 g of aluminum in the following cell when the cell potential is 1.15 V will be 615.91 kJ
What is cell potential ?The cell potential, Ecell, is the measure of the potential difference between two half cells in an electrochemical cell.
Expression for work done ;
W = ΔG° x mol (1)
But, to determine the ΔG°
ΔG° = -n x F x E° (2)
Where,
F is a constant and is 96,500 J/V moln is the number of transferred electrons in the reaction.(As there is variation from Al to Al³⁺ the change in number of electrons are 3)
To get the moles,
moles = m/MM (3)
moles = 50 / 26.98 = 1.85 moles of aluminum
Now,
ΔG° = -3 x 96,500 x 1.15
ΔG° = -332,925 J
= -332.925 kJ/mol
Now, using (1) we can determine the work done:
W = 332.925 x 1.85
W = 615.91 kJ
Hence, The maximum work available from 50.0 g of aluminum in the following cell when the cell potential is 1.15 V will be 615.91 kJ
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HELP ME PLEASE I AM STRUGGLING
maybe umm think so pick think so
Qué uso le darías en la vida diaria ayuda
Answer:
ako po kailangan ko po nga ayuda
Explanation:
thanks for the points ❤️
which molecule is butene
Answer:
Option C is the answer
Butene, also called Butylene, 4 isomeric compound belonging to the series of olefinic hydrocarbons. The chemical formula is C4H8, option c is correct.
What are the 4 isomers of butene?Butene, also called Butylene, four isomeric Combinations belong to the series of olefinic hydrocarbons. The chemical formula is C4H8.
The isomeric forms are 1-butene, cis-2-butene, trans-2-butene, and isobutylene.
Thus, option "C" is correct. the chemical formula is C4H8.
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bakit mahalaga ang ilaw trapiko?
grade 3
Explanation:
#IHOPEIHELPYOU PA BRAINLY NA LANG POHow many atoms are there in 24 moles of Fe?
Answer: There are [tex]145 \times 10^{23}[/tex] atoms in 24 moles of Fe.
Explanation:
According to the mole concept, 1 mole of a substance contains [tex]6.022 \times 10^{23}[/tex] atoms.
Therefore, atoms present in 24 moles of Fe are calculated as follows.
[tex]24 mol \times 6.022 \times 10^{23} atoms/mol\\= 144.52 \times 10^{23} atoms\\or, 145 \times 10^{23} atoms[/tex]
Thus, we can conclude that there are [tex]145 \times 10^{23}[/tex] atoms in 24 moles of Fe.
by what process does water vapor become a cloud?
a. evaporation
b. transpiration
c. condensation
d. precipitation
Write the balanced half-reaction that occurs at the anode in a lead-acid (storage) battery during discharge. Phases are optional. anode half-reaction: Write the balanced half-reaction that occurs at the cathode in a lead-acid (storage) battery during discharge. Phases are optional. cathode half-reaction: Write the balanced overall cell reaction that occurs in the lead-acid (storage) battery during discharge. Phases are optional. overall cell reaction:
Answer: Anode: [tex]Pb+SO_4^{2-}\rightarrow PbSO_4+2e^-[/tex]
Cathode: [tex]PbO_2+4H^++SO_4^{2-}+2e^-\rightarrow PbSO_4+2H_2O[/tex]
Overall cell reaction : [tex]Pb+2SO_4^{2-}+PbO_2+4H^+\rightarrow 2PbSO_4+2H_2O[/tex]
Explanation:
Lead storage battery is a secondary cell used in automobiles and invertors. The anode is made up of lead and undergoes oxidation during discharging and cathode is made up of lead oxide and acts as cathode during discharging. The electrolyte used is dilute .
Lead storage battery acts as electrochemical cell while discharging.
Discharging reaction for Anode:
Discharging reaction for Cathode: [tex]PbO_2+4H^++SO_4^{2-}+2e^-\rightarrow PbSO_4+2H_2O[/tex]
Overall cell reaction : [tex]Pb+2SO_4^{2-}+PbO_2+4H^+\rightarrow 2PbSO_4+2H_2O[/tex]
A lead storage battery is an energy storage device. At the anode lead and sulfate ion reacts to produce Lead(II) sulfate and release two electrons.
What are anode and cathode?In secondary cells or the recharge-discharge cells during recharge, the positive electrode is the anode, while during discharge cathode is the positive electrode.
The anode (lead) of the cell undergoes an oxidation reaction during the discharge, whereas the lead oxide or the cathode undergoes reduction.
The discharging reaction at the anode of the cell is given as,
[tex]\rm Pb + SO_{4}^{2-} \rightarrow PbSO_{4} + 2e^{-}[/tex]
The discharging reaction at the cathode of the cell is given as,
[tex]\rm PbO_{2} + 4H^{+} + SO_{4}^{2-} + 2 e^{-} \rightarrow PbSO_{4} + 2H_{2}O[/tex]
The overall cell reaction is given as,
[tex]\rm Pb + 2SO_{4}^{2-} + PbO_{2} + 4H^{+} \rightarrow 2PbSO_{4} + 2H_{2}O[/tex]
Therefore, the gain and loss of electrons are represented at the cathode and the anode of the cell.
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Calculate the concentration of NO2NO2 in an equilibrium mixture given that the concentration of N2O4=0.200MN2O4=0.200M and Keq=67.3Keq=67.3 for the reaction: 2NO2(g)⇌N2O4(g)2NO2(g)⇌N2O4(g). Calculate the concentration of in an equilibrium mixture given that the concentration of and for the reaction: . 18.3 M 0.00297 M 337 M 0.0545 M none of the above
Answer: The concentration of [tex]NO_{2}[/tex] in the given equilibrium mixture is 0.0545 M.
Explanation:
The ratio of concentration of products and reactants raised to the power of their coefficients is called equilibrium constant. The symbol used to denote equilibrium constant is [tex]K_{eq}[/tex].
As the given reaction equation is as follows.
[tex]2NO_{2}(g) \rightleftharpoons N_{2}O_{4}(g)[/tex]
The expression for equilibrium constant of this reaction is as follows.
[tex]K_{eq} = \frac{[N_{2}O_{4}]}{[NO_{2}]^{2}}[/tex]
Now, substitute the given values into above formula as follows.
[tex]K_{eq} = \frac{[N_{2}O_{4}]}{[NO_{2}]^{2}}\\67.3 = \frac{(0.2)}{[NO_{2}]^{2}}\\So, [NO] = \sqrt{\frac{0.2}{67.3}}\\= 0.0545 M[/tex]
Thus, we can conclude that the concentration of [tex]NO_{2}[/tex] in the given equilibrium mixture is 0.0545 M.
_____ the irregular break of a mineral.
a. Habit
b. arrangement
c. cleavage
d. Fracture.
Answer:
D Fracture
Explanation:
jus took the test
What're the differences between oxidation and reduction
Answer:
Oxidation:Oxidation is the loss of electron or Hydrogen atoms or gain of Oxygen atomsRemoval or loss of electronsA ⟶ A⁺ + e⁻
Removal of HydrogenAH + B ⟶ A + BH
Addition of OxygenA + BO ⟶ AO + B
All the above reactions release energy Reduction:Reduction is the gain of electron or Hydrogen atoms or loss of Oxygen atomsAddition or gain of electronsA + e⁻ ⟶ A⁻
Addition of HydrogenA + BH ⟶ AH + B
Removal of OxygenAO + B ⟶ A + BO
All the above reactions stores energy-TheUnknownScientist
Phosphorus (P4) and hydrogen gas can combine to form phosphine (PH3), a toxic gas with the odor of rotting fish. Complete and balance the equation for this chemical reaction.
Answer:
P₄ + 6 H₂ ⇒ 4 PH₃
Explanation:
Let's consider the unbalanced reaction that takes place when phosphorus reacts with hydrogen to form phosphine. This is a synthesis reaction.
P₄ + H₂ ⇒ PH₃
We will balance this reaction using the trial and error method. First, we will balance P atoms by multiplying PH₃ by 4.
P₄ + H₂ ⇒ 4 PH₃
Finally, we get the balanced equation by multiplying H₂ by 6.
P₄ + 6 H₂ ⇒ 4 PH₃
Metal plating is done by passing current through a metal solution. For example, an item can become gold plated by attaching the item to a power source and submerging it into a Au3 solution. The item itself serves as the cathode, at which the Au3 ions are reduced to Au(s). A piece of solid gold is used as the a node and is also connected to the power source, thus completing the circuit.
Required:
What mass of gold is produced when 15.0A of current are passed through a gold solution for 15.0min ?
Answer:
9.18g
Explanation:
Step 1: Write the reduction half-reaction
Au³⁺(aq) + 3 e⁻ ⇒ Au(s)
Step 2: Calculate the mass of gold is produced when 15.0A of current are passed through a gold solution for 15.0min
We will use the following relationships:
1 min = 60 s1 A = 1 C/s1 mole of electrons has a charge of 96486 C (Faraday's constant).1 mole of Au is produced when 3 moles of electrons circulate.The molar mass of Au is 196.97 g/mol.The mass of gold produced is:
[tex]15.0 min \times \frac{60s}{1 min} \times \frac{15.0C}{1s} \times \frac{1 mol e^{-} }{96486C} \times \frac{1molAu}{3 mol e^{-} } \times \frac{196.97gAu}{1molAu} = 9.18gAu[/tex]
Why would you want to slow down a chemical reaction?
Answer:
We often want to decrease the rates of certain reactions rather than speeding them up. For example, to prolong the shelf lives of certain foods, the chemical reactions by which they spoil must be slowed down.
What is the name of Na
How do scientists determine the names for so many different living things
Answer:
Taxonomy
Explanation:
The oceanic crust is destroyed at convergent boundaries because it_______________________ *
a) diverges to form a rift valley
b) goes into a subduction zone where it is melted by the hot magma
c) transforms
d) the rock crumbles at an ocean ridges
Answer: I believe the answer is d) the rock crumbles at an ocean ridges
Explanation:
Use the scenario to answer the following question. A group of students working in a chemistry lab are planning a procedure to neutralize 10.0mL of 5.0 M hydrochloric acid (strong acid) with 5.0 M potassium hydroxide (strong base). In their procedure they plan on adding an equal volume of the base to the acid. What would be the expected outcome of carrying out this step as planned?
a- The resulting pH will be less than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.
b- The resulting pH will not be able to be determined because the concentrations of the acid and base are not the same.
c- The resulting pH will be greater than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.
d- The resulting pH will be equal to 7 because a strong base will neutralize a strong acid.
Answer:
d- The resulting pH will be equal to 7 because a strong base will neutralize a strong acid.
Explanation:
The reaction between potassium hydroxide and hydrochloric acid of equal volume and equal concentration yields a solution of pH 7 at equivalence point. We must note that KOH is a strong base while HCl is a strong acid. This fact influences the pH of the system at equivalence point.
Owing to the fact that the acid is exactly neutralized by the base; at the equivalence point of such titration, it is expected that hydrogen ions(H+) and hydroxide ions (OH-) must have reacted to form water, this leads to a final pH of 7.
Calculate the kinetic energy of a mole of oxygen gas molecules that have a speed
of 10.0 m/s.
Answer:
1600J
Explanation:
1 mole of oxygen gas (O2) has a mass of 32g i.e. the molar mass = 32g/mol
Kinetic energy (K.E) = ½ × m × v²
Where;
m = mass (g)
v = speed or velocity (m/s)
From the information given in this question;
m = 32g
V = 10m/s²
K.E = ½ × 32 × 10²
K.E = 16 × 100
K.E = 1600J
- Standard state refers to
a) 1 atm and 25°C
b) 1 atm and 100°C
c) 1 atm and gaseous reactants
d) None of these
Answer: The standard state refers to 1 atm and [tex]25^{o}C[/tex].
Explanation:
It is known that a chemical/substance can either be present in a solid, liquid or gaseous state.
So, when the phase of a substance like solid, liquid or gas is present at 1 atmosphere pressure and at a temperature of [tex]25^{o}C[/tex] then it known as standard state of substance.
Thus, we can conclude that standard state refers to 1 atm and [tex]25^{o}C[/tex].
Which base(s) is weaker than ammonia?
hydroxylamine, methylamine, and pyridine
pyridine only
hydroxylamine and methylamine
hydroxylamine and pyridine
Answer:
Hydroxylamine and pyridine
Explanation:
Just did it
Which part of the graph represents how much energy the reactants need to gain to become products?
Answer: The answer is F
The answer is F , F shows the amount of energy the reactants need to gain to become products .
What are Potential Energy Diagrams ?
A potential energy diagram shows the change in potential energy of a system as reactants are converted into products.
From the figure attached we can understand the Eₐ is the activation energy reactants need to get converted into products.
Now when we study the figure( potential energy Diagram) given in the question ,
The reactants are energy level shown by G
The total energy required to get converted into products is denoted by H while ,
H - G is the actual energy required which is denoted by F.
Therefore F shows the amount of energy the reactants need to gain to become products .
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What molecule represents this structure
A)NH4
B)NH3
C)NH4+
D)NH3+
Explanation:
As I think Option C is correct i.e. NH4+.
PLZ ANSWER QUICK I AM IN TIMER HELP WILL GIVE BRAINLIEST
Which is greater, the moon's period of rotation or its period of revolution?
They are equal.
the moon's revolution period around Earth
Neither are known.
the moon's rotational period
Answer:
B
Explanation:
Which of the following is an example of an environmental impact of agriculture?
high use of mineral resources
high use of water
high use of gold, copper, and silver
high use of rock supplies
Answer:
high use of mineral resources
Explanation:
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