6. A certain quantity of helium gas is at a temperature of 27°C and a pressure of 1.00
atm. What will the new temperature be if its volume is doubled at the same time
that its pressure is decreased to one-half its original value? (Hint: Three variables
have been given so what equation will you use?)
I
Answer:
300K
Explanation:
Intitial temperature T1= 27°c +273= 300K
Initial pressure P1= 1.00 ATM
Initial volume V1= V
Final temperature T2= ???
Final volume V2 = 2V
Final pressure P2=P/2= 1/2= 0.5atm
How using the general gas equation, we have;
P1V1/T1=P2V2/T2
P1V1T2=P2V2T1
T2= P2V2T1/P1V1
SUBSTITUTING VALUES;
T2= 0.5 × 2V × 300/ 1 × V
T2= 300K
In equal-arm balances from the early twentieth century, it is sometimes observed that an aluminum sheet hangs from one of the arms and passes between the poles of a magnet. This causes the oscillations of the equal-arm balance to decay rapidly. In the absence of such magnetic braking, the oscillation might continue for a very long time, so that the experimenter would have to wait to take a reading. The oscillations decay because which of the following reasons? A. Aluminum is paramagnetic. B. Currents in the aluminum sheet set up a magnetic field that opposes the oscillations. C. The aluminum sheet is attracted to the magnet.
Answer:
Currents in the aluminum sheet set up a magnetic field that opposes the oscillations
Explanation:
It has been stated in the question that the aluminum sheet hangs from one of the arms and passes between the poles of the magnet and causes the magnetic field to decay rapidly. In the absence of this magnetic breaking, the oscillation may continue for a long time.
As the aluminum hangs from one of the sheets and passes between the poles of the magnet, the magnetic flux linked to the sheet changes and emf is induced in the sheet according to Lenz law. As a result of this induced emf, eddy currents are developed on the plate. The Eddy currents opposes the magnetic force on the aluminum sheets. This opposes the oscillation of the aluminum sheet and causes it to come to rest.
5.82 760.
Х
425.976
answer should have
sig.figs.
calculated answer:
Answer:
2482.4177376
Explanation:
1: 5.82 760 times 425.976
2: You will find the answer that is 2482.4177376
Hope this helps.
Which of these is the smallest?
atom
molecule
proton
an ant
Answer
proton
Explanation:
1-bromo-3-isobutil-4-heptanol
Answer:
See explanation.
Explanation:
Hello,
In this case, the chemical structure of the given compound, which is an alcohol, based on the suffix "ol", the bromo radical at the first carbon and the isobutyl radical at the 3rd carbon is shown on the attached picture wherein the hydroxyl is drawn at the 4th carbon. Remember that IUPAC rules for nomenclature help us to easily name or draw organic molecules by indicating the radicals and their positions and the main chain at the en of the name.
Best regards.
The diagrammatic structure for the compound 1-Bromo-3-isobutyl-4-heptanol can be seen in the image below.
When naming an organic compound, we will first consider the longest chain of the carbon atom and attach the substituents in such a way that we will have the lowest number when adding them.
In the compound 1-Bromo-3-isobutyl-4-heptanol, we first draw the seven carbon chain with -OH substituent on the fourth carbon. This was followed by adding the substituent of isobutyl to carbon atom 3 and bromine to carbon atom 1.
Learn more about naming organic compounds here:
https://brainly.com/question/5994723?referrer=searchResults
Use the following terms to fill in the blanks:
a. Molality,
b. Mole Fraction,
c. Molarity, Percent by Mass,
d .Unsaturated, Concentration
1. In chemistry, the most commonly used unit of concentration is_________ .
2. The amount of solute (in any measurement unit) divided by the amount of solvent or solution (in any measurement unit) is defined by the basic term of________________ .
3. Dividing the mass of solute by the total mass of solvent and solute will give you the _____________.
4. A method of describing concentration which shows the comparison of moles of solute to moles_____________.
Answer:
1. Molality.
2. Concentration.
3. Percent by mass.
4. Mole fraction.
Explanation:
Molarity is the measurement by which the number of moles is measured by a solute. The solution here is one liter respectively.
Concentration is the product which is emerged when the amount of the solute is divided by the amount o the solvent or solution.
Mole fraction refers to the number of component moles divided by the number of the solution moles.
The student is now told that the four solids, in no particular order, are magnesium bromide (MgBr2), sugar (C6H12O6), acetic acid (CH3COOH), and potassium bromide (KBr). Assuming that conductivity is correlated to the number of ions in solution, rank the four substances based on how well a 0.20 M solution in water will conduct electricity. Rank from most conductive to least conductive. To rank items as equivalent, overlap them.
Answer:
Order is MgBr₂ > KBr > (CH₃COOH) > (C₆H₁₂O₆)
Explanation:
Find the given attachment
Two cylinders are made of the same material. Cylinder A is one-fourth (1/4) the length of cylinder B and it has a radius that is four times greater than the radius of cylinder B. What is the ratio of the mass of cylinder A to the mass of cylinder B?
Answer:
[tex]M_{A}[/tex] : [tex]M_{B}[/tex] = 4 : 1
Explanation:
Given that:
Volume of a cylinder = [tex]\pi[/tex][tex]r^{2}[/tex]h
For cylinder A, [tex]l_{A}[/tex] = [tex]h_{A}[/tex] = [tex]\frac{1}{4} l_{B}[/tex] and [tex]r_{A}[/tex] = 4[tex]r_{B}[/tex].
Volume of cylinder A = [tex]\pi[/tex][tex](4r_{B}) ^{2}[/tex] × [tex]\frac{1}{4} l_{B}[/tex]
= 4[tex]\pi[/tex][tex]r_{B} ^{2}[/tex] [tex]l_{B}[/tex]
Volume of cylinder B = [tex]\pi[/tex][tex](r_{B}) ^{2}[/tex] [tex]l_{B}[/tex]
= [tex]\pi[/tex][tex]r_{B} ^{2}[/tex][tex]l_{B}[/tex]
To determine the ratio of their masses, density (ρ) is defined as the ratio of the mass (M) of a substance to its volume (V).
i.e ρ = [tex]\frac{M}{V}[/tex]
Thus, since the cylinders are made from the same material, they have the same density (ρ). So that;
density of A = density of B
density of A = [tex]\frac{M_{A} }{4\pi r_{B} ^{2}l_{B} }[/tex]
density of B = [tex]\frac{M_{B} }{\pi r_{B} ^{2}l_{B} }[/tex]
⇒ [tex]\frac{M_{A} }{4\pi r_{B} ^{2}l_{B} }[/tex] = [tex]\frac{M_{B} }{\pi r_{B} ^{2}l_{B} }[/tex]
The ratio of mass of cylinder A to that of B is given as;
[tex]\frac{M_{A} }{M_{B} }[/tex] = [tex]\frac{4\pi r_{B} ^{2} l_{B} }{\pi r_{B} ^{2} l_{B} }[/tex]
⇒ [tex]\frac{M_{A} }{M_{B} }[/tex] = [tex]\frac{4}{1}[/tex]
Therefore, [tex]M_{A}[/tex] : [tex]M_{B}[/tex] = 4 : 1
Answer:
4.
Explanation:
Hello,
In this case, since we are talking about the same material, their densities are the same:
[tex]\rho _A=\rho _B[/tex]
And each density is defined by:
[tex]\rho _A=\frac{m_A}{V_A} \\\\\rho _B=\frac{m_B}{V_B}[/tex]
Thus, we also define the volume of a cylinder:
[tex]V_{cylinder}=\pi r^2h[/tex]
Therefore, we obtain:
[tex]\rho _A=\frac{m_A}{\pi r_A^2h_A}[/tex]
[tex]\rho _B=\frac{m_B}{ \pi r_B^2h_B}[/tex]
Now, the given information regarding the the length and the radius is written mathematically:
[tex]h_A=\frac{1}{4} h_B\\\\r_A=4 r_B[/tex]
So we introduce such additional equations in:
[tex]\frac{m_A}{\pi r_A^2h_A}=\frac{m_B}{\pi r_B^2h_B}\\\\\frac{m_A}{\pi (4r_B)^2(\frac{1}{4}h_B)}=\frac{m_B}{\pi r_B^2h_B}\\\\\frac{m_A}{m_B} =\frac{\pi (4r_B)^2(\frac{1}{4}h_B)}{\pi r_B^2h_B}[/tex]
So we simplify for the radius and lengths:
[tex]\frac{m_A}{m_B} =\frac{\pi (4r_B)^2(\frac{1}{4}h_B)}{\pi r_B^2h_B}\\\\\frac{m_A}{m_B} =16 *\frac{1}{4}\\ \\\frac{m_A}{m_B} =4[/tex]
So the ratio of the mass of cylinder A to the mass of cylinder B is 4.
Best regards.
A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact and if the spheres have a radius r, the diagonal of the face of the cube is 2r. The tetrahedral hole is inside the middle of the cube. Find the length of the body diagonal of this cube and then find the radius of the tetrahedral hole.
Answer:
Now length of body diagonal of this cube = √3×√2×r =2.45r
Explanation:
a) length of body diagonal of this cube = √3×√2×r = 2.45 r
it can solved as following
length of body diagonal = √3a (where a is edge length of cube)
length of face diagonal = √2a
But length of face diagonal = 2r
Therefore a = 2r /√2 = √2×r
Now length of body diagonal of this cube = √3×√2×r
.The Lithosphere is another name used for one of the earth systems. Name this system!
Answer:
Earth's crust
Explanation:
The lithosphere is the rigid outer part of the earth, consisting of the crust and upper mantle. It is the, rigid, rocky outer layer of the Earth, consisting of the crust and the solid outermost layer of the upper mantle. It extends to a depth of about 60 miles (100 km). It is the outer part of the solid earth composed of rock essentially like that exposed at the surface, consisting of the crust and outermost layer of the mantle.
We can also look at it as the solid part of the earth on which plants grow and animals survive. It contains all the rock formations that bear the various minerals found on earth.
The lithosphere is composed of both the crust and the portion of the upper mantle that behaves as a brittle, rigid solid.
How many liters of air are in a room that measures 10.0 ft × 11.0 ft and has an 8.00 ft ceiling? 1 in. = 2.54 cm (exactly); 1 L = 103 cm3
Answer:
2.42x10^5 L
Explanation:
10.0ft x 11.0 ft x 8.00 ft = 880. ft^3 (1 cubic foot = 28316.8 cubic cm)
880. ft^3 * (28316.8 cubic cm/ 1 cubic foot) = 24,918,784 cm^3
(1L=103 cm^3)
24,918,784 cm^3 (1L/103 cm^3) = 2.42x10^5 L
[tex]2.42*10^5[/tex] liters of air are in a room.
Unit conversions:It helps to show another person the exact amount you have. Assist in solving a mathematical problem, especially in chemistry, where you can follow the units to get to the answer. Show which measurement system the person is using.
1 in. = 2.54 cm
1 L = 10³ cm³
Given: 10.0 ft × 11.0 ft 8.00 ft ceiling
Now, converting into given quantities:
[tex]10.0ft * 11.0 ft * 8.00 ft = 880. ft^3 ( = 28316.8 \text{ cubic cm})\\\\880. ft^3 * (\frac{28316.8 \text{ cubic cm}} {\text{1 cubic foot}} }) = 24,918,784 cm^3\\\\24,918,784 cm^3 (\frac{1L}{10^3 cm^3})= 2.42*10^5 L[/tex]
→ Thus,[tex]2.42*10^5[/tex] liters of air are in a room that measures 10.0 ft × 11.0 ft and has an 8.00 ft ceiling.
Find more information about Unit conversion here: brainly.com/question/13016491
50 Points
Atoms contain subatomic particles called protons and neutrons. When these protons and neutrons split, a lot of energy is released.
What kind of energy is this?
nuclear
radiant
thermal
chemical
Answer:
nuclear
Explanation:
This is because when the protons and neutrons split the energy being released is heat, also known as nuclear fission.
Answer:
The answer is Nuclear
What diseases are spread in warm temperatures?
Answer:
malaria, st louis encephalitis, lyme disease, influenza, cyptosporidium, cholera.
Malaria and viral diseases such as dengue, yellow fever, and the Zika virus.
Question 2
In the reaction:
P4+6C12 - 4PC13
How many grams of P4 are required for the complete reaction of 2.40 moles of CIZ?
0 0.1168
12.4g
298 g
1988
49.6 g
Calculate the pH of 0.65 M H2SO4 (sulfuric acid) solution? (Ka2: 1.1x10-2)
Answer:
Explanation:
.65 M H₂SO₄
H₂SO₄ ⇄ 2H⁺ + SO₄⁻²
C(1-x) 2xC xC
(2xC)². xC /C( 1- x ) = 1.1 x 10⁻²
4 x³C² = 1.1 x 10⁻²
4 . x³ .65² = 1.1 x 10⁻²
x³ = .0065 = 6.5 x 10⁻³
x = 1.867 x 10⁻¹
H⁺ ion concentration =
2xC = 2 x 1.867 x 10⁻¹ x .65
= .2427
pH = - log ( .2427 )
= 0 .615 .
The Pecos Pueblo developed as a trading center over time. What evidence in the text supports the idea that this took a long time?
Because of its value as trading center, the Pecos Pueblo grew in size."
One of the last places the trail passed through was the Pecos Pueblo.
The site was just right for the trade.
Today, the trail attracts tourist instead of traiders.
Answer:
hi idk the answer
Explanation:
If electrons are collectively compressed into a very small volume (e.g., within the core of a dying white dwarf star) where quantum mechanical considerations become important in preventing one electron from occupying space near to a second electron (Pauli exclusion principle), what is the result?
Answer: A degenerate pressure will generate a large force to repel further compression.
Explanation: In the production of new stars from the core of old dying white dwarf stars, the inner parts of the star will experience contraction with the release of heat , as they contract, their atoms will be squeezed such that their electrons start to overlap, and because of the Pauli's exclusive principle which states that no two electrons can occupy same space, the electrons will begin to repel each other and an opposing pressure called degenerate pressure will create a force so that the electrons cannot continually be crushed or overlap. With the limit of contraction, the outer parts of the star will expand and be repelled releasing the old stars called nebula and creating space for the inner new stars to form.
Kayla wants to be an active listener. What can she do?
A. She can tell people what she knows about their backgrounds.
B. She can ask people about their backgrounds .
C. She can say she already knows everything about different backgrounds.
D.She can write songs about people's backgrounds .
Answer:
B. She can ask people about their backgrounds .
Explanation:
A, C, and D, aren't good answers.
(A. She can tell people what she knows about their backgrounds.) Telling is far different from listening.
(C. She can say she already knows everything about different backgrounds.) Saying you know everything about a background wouldn't be a good answer.
(D. She can write songs about people's backgrounds.) This could be an answer but I believe that B. is the answer.
Hope this helped :)
Why was meteorology such a late developer compared to other branches of science?
Answer:
Because of the difficulties of measuring the atmosphere's properties above the earth's reachable surface
Explanation:
Hello,
In this case, meteorology is the branch of science studying the atmosphere in its weather processes and forecasting and it had a late development because of the difficulties of measuring the atmosphere's properties above the earth's reachable surface. We cannot forget that even nowadays, it is very difficult to predict upcoming weathers with the 100 % assurance and with many days in advance.
Best regards.
Meteorology is developed lately as compared to other branches of science due to far away from the reach of humans.
Meteorology is a late developer compared to other branches of science because the measuring the climatic conditions in the atmosphere is difficult and even impossible without the presence of advance technologies.
To find out the weather as well as climatic conditions can't be measured due to it is not reachable to the human like other materials present on the earth surface so we can conclude that meteorology is developed lately as compared to other branches of science due to far away from the reach of humans.
Learn more: https://brainly.com/question/16565664
Which of the following elements has the lowest ionization energy?
Na
C
F
He
Rb
Answer:
Rb
Explanation:
Ionization energy is defined required energy to eliminate or remove an electron from an ion or atom.
From the given elements Rb or Rubidium has the lowest ionization energy as it has lowest shielding effect, so it easy to remove electron from it's shell.
The ionization energy generally decreases from top to bottom in groups due to lower shielding effect and outer electrons are loosely packed so easy to remove and increases from left to right across a period because of valence shell stability.
Rubidium has atomic number 37 and lies below than other given elements and also placed in the left side in the periodic table.
Hence, the correct option is Rb
Why is reaching activation energy necessary
how many moles are in 15 grams of lithium?
Answer:
there are approximately 52 moles in 15 grams of lithium.
what is the difference between hydrolysis reaction and neutralization reaction.
Answer:
Hydrolysis= Addition of a water to a molecule to produce two molecules
Neutralization= Reaction between and acid and a base to produce a salt and water.
Explanation:
These are two common reactions but they are very different. Lets see a few examples:
In a hydrolysis we add a water molecule to produce several substances (see figure 1).
In this reaction water ([tex]H_2O[/tex]) is added in order to "break" the molecule and produce several subtances.
When we have a neutralization reaction, an acid (a subtance that can produce hydronium ions [tex]H^+[/tex]) reacts with a base (a subtance that can produce hydronium ions [tex]OH^-[/tex]) to produce water an a salt:
[tex]HCl~+~NaOH->~NaCl~+~H_2O[/tex]
In this reaction we an acid ( [tex]HCl[/tex]) and a base ([tex]NaOH[/tex]) and this reaction give a salt ([tex]NaCl[/tex]) and water ([tex]H_2O[/tex]).
I hope it helps!
What is the [H30+] in a solution with (OH) = 1.0 x 10-12 M?
Answer:
Concentration of hydronium ion, H3O+ is 1x10^-2 M
Explanation:
The following data were obtained from the question:
Concentration of Hydroxide ion, [OH-] = 1.0x10^-12 M
Concentration of hydronium ion, [H3O+] =?
Next, we shall determine the pOH of the solution. This is illustrated below below:
pOH = - Log [OH-]
pOH = - Log 1.0x10^-12
pOH = 12
Next, we shall determine the pH of the solution.
pH + pOH = 14
pOH = 12
pH + 12 = 14
Collect like terms
pH = 14 - 12
pH = 2
Finally, we shall determine the Concentration of hydronium ion, [H3O+] as follow:
pH = - log [H3O+]
pH = 2
2 = - log [H3O+]
- 2 = log [H3O+]
[H3O+] = Antilog (-2)
[H3O+] = 0.01M = 1x10^-2 M
Consider the following information.
A+ KOH → B+ 2 KNO3What is the molecular formula of A, what is the molecular formula for B? You have to balance the A + KOH part of the equation. MM of B = 62.068g/mol
B is 38.67 % C, 9.67% H and 51.56 % O
Answer:
The molecular formula for A is C2H4(NO3)2
The molecular formula for B is C2H6O2
Explanation:
I linked an image that will show the work.
How many moles would needed to be dissolved in 1 dm3 to get a 3M solution? How many would be needed if only 0.1 dm3 were used?
Answer:
I sent u on insta
Explanation:
Found it
A Tesla roadster electric vehicle has a MPGe (Miles per Gallon equivalent) of 102 miles per gallon. A Ford F-150 has a rating of 21 MPG. The weight of the electric battery in the Tesla is 1062 lb. The volume of the gas tank in the F-150 is 83.2791 L. The density of gasoline is 748.90002 kg/m³. Which weighs more, the battery in the Tesla or the gasoline in the F-150.?
Answer:
The battery in the Tesla weighs more
Explanation:
Mass = Density × volume
Density of gasoline = 748.90002 Kg/m³
Volume of tank in m³ = 83.2791/1000 = 0.0832791 m³
Mass of gasoline in F-150 = 748.90002 × 0.0832791 = 62.3771 Kg
Converting mass in Kg to lb
Mass of gasoline (lb) = 62.3771 × 2.204623
Mass of gasoline (lb) = 137.51 lb
Weight of battery in Tesla = 1062 lb
Comparing the two shows that the battery of the Tesla weighs more.
2. A flask and stopper have a mass of 110.525 g. A 50.0-mL sample of gasoline is transferred to the flask, and the flask, stopper, and liquid have a mass of 145.028 g. Find the density of gasoline in g/mL. Show work and report density with the appropriate number of significant figures.
Answer:
0.690 g/mL
Explanation:
Density is the ratio of mass to volume:
gasoline mass = (flask+gas mass) - (flask mass) = 145.028 g -110.525 g
gasoline mass = 34.503 g
Density = (gas mass)/(gas volume) = (34.503 g)/(50.0 mL)
Density = 0.690 g/mL
_____
The least-precise number in this calculation is the sample volume, which has 3 significant figures. Thus, the answer is good only to 3 significant figures.
A burner on a stove produces?
Answer:
thermal energy
Explanation:
Answer:
B- Thermal Energy
Explanation:
Thermal energy is produced due to all of the movement of particles inside the material.
1. _ LiBr2 + __K2CO3 -->___ LiCO3 +_ KBr
Reaction Type:
Answer:
Double displacement chemical reaction.
Explanation:
Hello,
In this case, for the given reaction we firstly balance it:
[tex]LiBr_2 +K_2CO3 \rightarrow LiCO3 +2KBr[/tex]
Then, since the lithium and potassium cations are being exchanged to each other from bromide and carbonate, we are talking about a double displacement chemical reaction.
Best regards.