Answer:
The extraction is done by electrolysis. The ions in the aluminum oxide must be free to move so that electricity can pass through it. Aluminum oxide has a very high melting point (over 2000°C) so it would be expensive to melt it. Aluminum oxide does not dissolve in water, but it does dissolve in molten cryolite.
Explanation:
Witch object would be attracted by a magnet?
Answer:
Any type of Ferromagnetic metals a quick and easy example is a nail made out of iron, where as a penny made out of zinc and copper both of them being non magnetic.
Explanation:
A precipitate is formed when the two solutions, barium nitrate, Ba(NO3)2, and phosphoric acid, H3PO4, are
mixed. Identify the correct products for this reaction.
A)
BaHa & NPO4
B)
BazN2 & HNO3
Baz(PO4)2 & NO2
D)
Baz(PO4)2 & HNO3
d. Ba₃(PO₄)₂(s)+6HNO₃(aq)
Further explanationDouble-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur
Because A precipitate is formed, then compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ + are generally included in the insoluble compound
So the reaction :
3Ba(NO₃)₂(aq)+2H₃PO₄(aq)⇒Ba₃(PO₄)₂(s)+6HNO₃(aq)
A precipitate is formed ⇒ Ba₃(PO₄)₂
which of the following is the conjugate acid of CIO-
The conjugate acid of CIO⁻ is HClO. Hence, Option (D) is correct.
What is Conjugate Acid - Base concept ?A conjugate acid, within the Brønsted–Lowry acid–base theory, is a chemical compound formed when an acid donates a proton to a base.
In other words, it is a base with a hydrogen ion added to it, as in the reverse reaction it loses a hydrogen ion.
Therefore, The conjugate acid of CIO⁻ is HClO. Hence, Option (D) is correct.
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In this unbalanced chemical equation, which element is not conserved?
3LIOH + H3PO4 Li PO4 + 3H20
A. O
B. H
C. P
D. LI
Answer:
LI
Explanation:
There is three Li in the start but One Li after
Explain in words or using your diagrams how beryllium atoms would react with fluorine atoms.
Show clearly the outcome of the reaction and state the formula.
Explanation:
To delineate the the nature of the bonds that would be formed between the two elements, let us first write the electronic configuration of the two species;
Be = 2, 2
F = 2, 7
Beryllium is a metal with two valence electrons whereas fluorine is a halogen with seven valence electrons.
When Be loses two electrons it becomes isoelectronic with He;
Be → Be²⁺ + 2e⁻
Also, when fluorine gains an electron, it becomes isoelectronic with Ne;
F + e⁻ → F⁻
This loss and gain of electrons between the two elements creates an electrostatic attraction them and they enter into an electrovalent bond.
Hence;
Be²⁺ + 2F⁻ → BeF₂
PLS I NEED HELP!! Lucia wants to arrange the four states of matter from lowest kinetic energy to highest kinetic energy. How should she arrange them?
A. liquid, solid, plasma, gas
B. liquid, solid, gas, plasma
C.solid, liquid, plasma, gas
D. solid, liquid, gas, plasma
Answer:
Basically, the more hot the state is, the more kinetic energy it will have. This means that answer D. would be right, as it goes from coldest to hottest states!
Answer:
The answer is D. solid, liquid, gas, plasma
Explanation:
Which statement is best supported by the information in the chart?
Atom X will donate electrons to Atom Y.
Atom X will accept electrons from Atom Y.
Atom Y will accept electrons from Atom Z.
Atom Z will donate electrons to Atom X.
Answer:
B
Explanation:
Because , it is the answer .
Based on the information provided in the chart, the statement that is best supported is Atom X will donate electrons to Atom Y. Option A is the correct answer.
Atom X has 6 valence electrons, which means it has 6 electrons in its outermost energy level. Atom Y has 2 valence electrons, indicating that it has 2 electrons in its outermost energy level. In a chemical reaction, atoms tend to either donate or accept electrons to achieve a stable electron configuration. Option A is the correct answer.
Atom X has more valence electrons than Atom Y, suggesting that it is more likely to donate electrons. Since Atom Y has fewer valence electrons, it is more likely to accept electrons from Atom X. Therefore, based on the number of valence electrons, Atom X will donate electrons to Atom Y in order to achieve a stable electron configuration.
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Which of the following quantum leaps would be associated with the greatest energy of emitted light? n = 2 to n = 5 n = 5 to n = 4 n = 5 to n = 1 n = 4 to n = 5
Answer: I think it’s n=5 to n=1
Explanation:
The greatest energy has been emitted with the radiation of the quantum leap associated with n=5 to n=1. Thus, option C is correct.
Quantum leaps have been the atomic orbitals that has been holding the electrons. The orbitals have been arranged with the increasing order of the energy.
The atoms has been required to gain energy in order to jump from the lower energy level to the higher energy level. There has been the emission of the radiations when the atoms have been returned from the excited state to the ground state.
The energy of the emitted radiations have been maximum with the return of the electron from the higher energy level to the lowest. Thus, the greatest energy has been emitted with the radiation of the quantum leap associated with n=5 to n=1. Thus, option C is correct.
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Kendrick goes to his neighborhood gym to exercise. The process of cellular respiration makes it possible for him to run on the treadmill and to lift weights. What do Kendrick's cells do during cellular respiration?
A.His cells convert kinetic energy into chemical energy.
B.His cells use oxygen to break down food molecules to release energy.
C.His cells absorb light energy through the chlorophyll in their chloroplasts.
D.His cells combine water and carbon dioxide to produce oxygen and glucose.
Answer:
i think it is B
Explanation:
His cells use oxygen to break down food molecules to release energy.
A gas occupies 1.56 L at 1.00 atm. What will be the volume of this gas if the pressure becomes 3.00 atm?
Answer:
0.52 LExplanation:
The new volume of the gas can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{1.56 \times 1}{3} = \frac{1.56}{3} \\ [/tex]
We have the final answer as
0.52 LHope this helps you
A fish swimming in water uses its fins to push the water backward, making 2 points
it swim forward. This is an example of Newton's
law of motion. *
Answer:
Newton's third law
Explanation:
A fish swimming uses its fins to push the water backward making it swim forward is obeying Newton's third law of motion.
Newton's third law of motion states that "action and reaction are equal and opposite".
When the fish uses its fin to push the water backward, it reacts by being propelled in the opposite direction which is in the forward sense.
The third law is clear indicator that forces are always in pairs. As the fish swims, a net force between the oppositely directed forces do not cancel out.
How does the mass of an atom effect the amount a charged atom gets deflected?
I NEED HELP!! PLEASE
what is the predicted order of electronegativity values from least to greatest for elements in the second period?
A. li b>n>f
B. c b>n>f
D. there is no way to predict
Someone please help will mark as brainliest
Answer: no you need a balance skall to make it the correct balance that you want. yes the hypothesis is correct because you change the balance with your balance scale so obviously it's going to make your hypothesis higher.
Explanation: I HOPE THAT HELPED.
1. Raw egg to boiled egg.
2. Batter to idli.
3. Wet clothes to dry clothes.
4. Woollen yarn to knitted
sweater.
5. Grain to its flour.
6. Cold water to hot water.
7. Straight string to a coiled string.
8. Bud to flower.
9. Milk to Cheese.
10. Cowdung to biogas.
II. Ice cream to melted ice-cream.
12. Stretched rubber band to
its normal size.
13. Souring of milk.
14. Ripening of a mango.
15. Dissolving sugar in water.
these are reversible or Irreversible, chemical or physical, Natural or manmade, periodic or non periodic,desirable or undesirable?
Answer:
This is man made and natural
what polyatomic ion could form a neutral compund with the manganese
Answer:
The polyatomic cation that will react with MnO₄⁻ to form a neutral compound is NH₄⁺ (ammonium ion) to form NH₄MnO₄ (Ammonium permanganate).
you observe the light from a distant star through a spectroscopy. According to the belief that the universe is expanding from a single dense point ise the picture above to explain how it represents the ligt from the galaxy?
Answer:
The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest. This means that no matter what galaxy you happen to be in, all the other galaxies are moving away from you.
However, the galaxies are not moving through space, they are moving in space, because space is also moving. In other words, the universe has no center; everything is moving away from everything else. If you imagine a grid of space with a galaxy every million light years or so, after enough time passes this grid will stretch out so that the galaxies are spread to every two million light years, and so on, possibly into infinity. The universe encompasses everything in existence, from the smallest atom to the largest galaxy; since forming some 13.7 billion years ago in the Big Bang, it has been expanding and may be infinite in its scope. The part of the universe of which we have knowledge is called the observable universe, the region around Earth from which light has had time to reach us.
One famous analogy to explain the expanding universe is imagining the universe like a loaf of raisin bread dough. As the bread rises and expands, the raisins move farther away from each other, but they are still stuck in the dough. In the case of the universe, there may be raisins out there that we can’t see any more because they have moved away so fast that their light has never reached Earth. Fortunately, gravity is in control of things at the local level and keeps our raisins together.The American astronomer Edwin Hubble made the observations in 1925 and was the first to prove that the universe is expanding. He proved that there is a direct relationship between the speeds of distant galaxies and their distances from Earth. This is now known as Hubble’s Law. The Hubble Space Telescope was named after him, and the single number that describes the rate of the cosmic expansion, relating the apparent recession velocities of external galaxies to their distance, is called the Hubble Constant. It might be easier to explain about the beginning of the universe and the Big Bang Theory, than to talk about how it will end. It is possible that the universe will last forever, or it may be crushed out of existence in a reverse of the Big Bang scenario, but that would be so far in the future that it might as well be infinite. Until recently, cosmologists (the scientists who study the universe) assumed that the rate of the universe’s expansion was slowing because of the effects of gravity. However, current research indicates that the universe may expand to eternity. But research continues and new studies of supernovae in remote galaxies and a force called dark energy may modify the possible fates of the universe.
Explanation:
I hope I help :))
The big bang theory states that the universe started from a single dense point. This single point stretched and inflated gradually because of the expansion. The light from the galaxy shows an increase in the wavelength due to this expansion.
What does light from a galaxy tell about the expansion of the universe?By looking at ultraviolet light, astronomers can tell which stars are forming in different galaxies and where they’re forming inside those galaxies. The ultraviolet and visible light coming from the most distant galaxies is converted into infrared light on its way through the expanding universe.
As the universe is expanding the galaxies are moving away from us. There is a shift in the wavelength of the light coming from these galaxies. This shift in the wavelength is referred to as redshift. This is because an expansion of the universe causes an increase in the distance between the two crests of the wave which results in the wavelength increase.
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When does a phyisical change occur?
what is the half life of the element in the picture
HELP BRAINLIEST
Answer:
6 days
Explanation:
The following data were obtained from the question:
Original amount (N₀) = 100 mg
Amount remaining (N) = 6. 25 mg
Time (t) = 24 days
Half life (t½) =?
Next, we shall determine the decay constant. This can be obtained as follow:
Original amount (N₀) = 100 mg
Amount remaining (N) = 6. 25 mg
Time (t) = 24 days
Decay constant (K) =?
Log (N₀/N) = kt / 2.303
Log (100/6.25) = k × 24 / 2.303
Log 16 = k × 24 / 2.303
1.2041 = k × 24 / 2.303
Cross multiply
k × 24 = 1.2041 × 2.303
Divide both side by 24
K = (1.2041 × 2.303) / 24
K = 0.1155 /day
Finally, we shall determine the half-life of the isotope as follow:
Decay constant (K) = 0.1155 /day
Half life (t½) =?
t½ = 0.693 / K
t½ = 0.693 / 0.1155
t½ = 6 days
Therefore, the half-life of the isotope is 6 days
PLEASE HELP WITH CHEMISTRY !! WILL GIVE BRAINLIEST AND 10 POINTS
Wavelength = 6.25 x 10⁻¹⁰ m
Energy=3.1805 x 10⁻¹⁶ J
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸
λ = wavelength
Frequency : 4.8 x 10¹⁷ /s
the wavelength :
[tex]\tt \lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3.10^8}{4.8.10^{17}}=6.25\times 10^{-10}~m[/tex]
Energy :
[tex]\tt E=6.626.10^{-34}\times 4.8\times 10^{17}=3.1805\times 10^{-16}~J[/tex]
Sorry,for table 3 , I can't find it
Question
Select all the correct answers.
Which statements are true about all waves?
It’s caused by a disturbance.
It requires a medium to travel.
It carries energy.
It carries matter.
Answer:
It’s caused by a disturbance.
It carries energy.
Explanation:
A wave is a disturbance that transmits energy from one point to another. It does no necessarily carry the particles or matter of the medium.
Waves usually carries energy. It is this energy they use in creating disturbances.
Not all waves carries matter; a good example is electromagnetic waves. Also, electromagnetic waves do not require a medium for propagation.
Which half-reaction correctly describes an oxidation?
Upper C a (s) plus 2 e superscript minus right arrow upper C a superscript 2 plus (a q).
Upper B r subscript 2 plus 2 e superscript minus right arrow 2 upper B r superscript minus.
Upper N a superscript plus (a q) right arrow upper N a (s) plus e superscript minus.
Upper C r (s) right arrow upper C r superscript 3 plus (a q) plus 3 e superscript minus.
Answer: The Answer was D. These people trolling. Look at the attachments I put on
Explanation:
An oxidation half reaction is one in which electrons are lost. Hence the reaction, Cr^3+(aq) ----> Cr(s) + 3e is an oxidation reaction.
What is oxidation?The term oxidation has to do with the loss of electrons. When an oxidation half reaction takes place, a specie loose electrons. We will now look out for the reaction in which electron loss takes place.
Now, in option D, the reaction is Cr^3+(aq) ----> Cr(s) + 3e. Three electrons where lost here hence this is an oxidation half reaction.
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How many moles are in 1.00x1025 Ni2+ ions?
Answer:
The answer is 16.61 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{1.00 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 16.6112956...[/tex]
We have the final answer as
16.61 molesHope this helps you
what is a ball and socket joint?
Answer:
spheroidal joint
Explanation:
Ball-and-socket joint, also called spheroidal joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint.
In which medium will a sound wave move more quickly?
Ethanol, air, vacuum, rock.
Answer:
Rock
Explanation:
The diagram shows the electron arrangement in a molecule of ammonia, showing only outer
shell electrons.
I
H
(i) State the type of bonding in ammonia.
1
6
The diagram shows 5 eletctron in the outermost shell of Nitrogen atom out of which 3 electrons are involved in the bond formation with 3 Hydrogen atoms.
The type of bond in ammonia is Covalent.
What is covalent bond ?Covalent bond is the bond formed by mutual Sharing of electrons by both the atoms taking part in the bond formation.
Nitrogen has 5 valence electrons of which only 3 are shares with the 3 atoms of hydrogen (one electron shares with one atom of hydrogen)
Hence, type of bond in ammonia is covalent.
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Please hurry i really need it fast
The answers are here
In which figure does Colin do work?
A. Figure A
B. Figure B
C. Both figures
D. Neither figure
is the following true or false every element in the periodic table follows the aufbau principle
Answer:
True
Explanation:
It is true that every element in the periodic table follows the Aufbau's principle.
The principle states that "the sublevels with lower energies are filled up before those with higher energies".
Sublevels do not fill up in numerical order. This is true when writing the electronic configuration of all atoms on the periodic table.Answer:False
Explanation:
1. Place the molecules in the list in order with the smallest molecules at the top and the largest molecules at the bottom.
= glucose molecule
= starch molecule
= protein molecule
= carbon dioxide molecule
= water molecule
= amino acid molecule
= oxygen molecule
Answer:
Explanation:
In creating this list, one will have to start from the atom (which is the smallest in the list) to the giant polymer (which is the largest in the group). The arrangement below will also be based on there molecular weight.
oxygen molecule (this is the first because it is an atom)
water molecule (this is lighter in weight than carbon dioxide)
carbon dioxide
amino acid molecule (most amino acids have a lesser molecular weight than glucose)
glucose (has a molecular weight of 180.156 g/mol)
protein molecule (several proteins have a lesser molecular weight than starch)
starch molecule (has a molecular weight of 359.33 g/mol)
The arrangement of molecules in the ascending order is: oxygen, water, carbon dioxide, amino acid, glucose, starch, and protein.
• The size of the molecules can be determined by knowing their molecular weights.
• The sum of the atomic weights of the atoms in the molecule is known as the molecular weight of the molecule.
• The molecular weight of water is 18 gram per mole, glucose 180.2 g/mol, starch 360 g/mol, carbon dioxide 44 g/mol, protein 20000 g/mol, amino acid for example glycine 75 g/mol, and oxygen 16 g/mol.
Thus, the molecules can be arranged with the smallest to the largest as oxygen, water, carbon dioxide, amino acid, glucose, starch, and protein.
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The heat of fusion of a metal is 7.62 J/g at its freezing point of 592°F. How much energy is required to melt 257 g of this metal (already in 592°F)?
Answer:
7.62 plug into the equation for freezing
0= 592/7.62x x 90
0 = 77.69x x 90
x=0
therefore according to balton's law, it is required to have 0 + 27.222222222 (balton's number) to get the energy required.
answer is 27.222222 rounded 27. cheers.