Please can someone help me with answers and and explanation of why. Thank you!
In the voltaic cell :
at the cathode ⇒reduction reaction
at the anode ⇒ oxidation reaction
We can see which metal is more reactive between Ag and Mg with voltaic series
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au
From the series , Mg more reactive than Ag, so that Mg undergoes an oxidation reaction and Ag reduction reaction
Half-reactions
cathode : Ag⁺ (aq) + e⁻ ⇒ Ag (s)
anode : Mg (s) → Mg²⁺ (aq) + 2e−
So the answer for :
15. A. Ag⁺ (aq) + e⁻ ⇒ Ag (s) (Reduction reaction)
16. C. Mg (s) → Mg²⁺ (aq) + 2e− (Oxidation reaction)
17. A. the anode (oxidation reaction)
SOIL IS CONSIDERED WHICH TYPE OF MIXTURE?
A. HOMOGENEOUS
B. COLLOID
C. HETEROGENEOUS
D. NONE OF THESE
[tex]\bold{Hello!}\\\bold{Your~Answer~Is~Below!}[/tex]
______________________________
[tex]\bold{Meanings:}[/tex]
[tex]1.)~Homogenous~-~Particles~distributed~uniformly,~(Evenly.)[/tex]
[tex]Ex:Vodka,~Steel,~Air,~Rain.[/tex]
[tex]\left[\begin{array}{ccc}O&o&O\\o&O&o\\O&o&O\end{array}\right][/tex]
[tex]2.)~Heterogenous~-~Particles~distributed~non~uniformly,~(Random.)[/tex]
[tex]Ex:Cereal~in~milk,~Ice~in~soda,~Soil,~Blood.[/tex]
[tex]\left[\begin{array}{ccc}o&O&O\\O&o&o\\O&o&o\end{array}\right][/tex]
[tex]3.)~Colloid~-~This~mixture~is~made~up~of~particles~that~can~not~be~seperated.[/tex]
[tex]Ex:Milk,~Fog,~Shampoo,~Rubber.[/tex]______________________________
[tex]\bold{Answer:}[/tex]
[tex]\bold{Soil~is~considered~a~heterogeneous~mixture}\\\bold{becuase~there~are~so~many~compontents~that~make~up~soil,~and~none~}\\\bold{of~them~are~ordered~evenly.}\\\\\bold{So~your~answer~is~\boxed{C.}}[/tex]
______________________________
[tex]\bold{Hope~this~helps,}\\\bold{And~best~of~luck!}\\\\\bold{~~~-TotallyNotTrillex}[/tex]
Hunter is in lab. He clears a spot on his lab bench to start working. He also puts his lab coat and goggles on. He then identifies where all of the safety equipment is. He notices his station is next to the fume hood, which ventilates the chemicals stored there. The noise of the fume hood was bothersome, so Hunter turned it off. Which could be an error in his set-up? He should not turn off the fume hood. He should wait to put on his coat until after the directions are given. He should wait to put on his goggles until after the directions are given. He should not sit next to the fume hood.
Answer:
He should not turn off the fume hood.
Explanation:
According to this question, Hunter is in a laboratory where he is about to commence work. He starts by adhering to some laboratory safety rules including putting on his lab coat and goggles. However, he was bothered by the noise of the fume hood, which was close to his station. He then decided to switch/turn it off.
The "TURNING OFF OF THE FUME HOOD" is Hunter's error in this experimental set-up. This is because the fume hood is a laboratory safety device that helps prevent the inhalation of harmful gases by laboratory workers. The fume hood is a ventilated compartment which ventilates i.e. passes out, the chemicals stored there.
Every experiment involving chemicals should be performed in the fume hood in order to curb the escape of fumes from this reactions. Hence, TURNING THE FUME HOOD OFF means that one of the safety laboratory protocols has been defaulted.
Answer:
He should not turn off the fume hood.
Explanation:
The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best explains why people on Earth cannot see the entire shape of the Milky Way? Many more stars exist outside of the galaxy Many more stars exist outside of the galaxy Earth is a part of this galaxy so the rest is not easily visible Earth is a part of this galaxy so the rest is not easily visible The stars in the center of the galaxy are extremely small The stars in the center of the galaxy are extremely small The center of the galaxy consists of a dense cluster of stars
Answer: Earth is a part of this galaxy so the rest is not easily visible.
Explanation:
Milky Way consists of 200 billion stars, dust and gas. It solar system lies in the center of the galactic center. 20 light years above the plane of galaxy. The galactic center consists of huge number of stars which keep on rotating in the center. It is considered as a supermassive black hole. The planets also rotate in the galaxy. The earth is the part of the solar system which is the part of the galaxy. The earth is not visible in the galaxy so we cannot observe the entire galaxy from the earth.
which of the following groups of elements are likely to have substances that have both metallic and non metallic properties?
a. actinides
b. group 18
c. lanthanides
d. group 14
Answer is A
At the bottom of the periodic table is a special group of metallic radioactive elements called actinides or actinoids. These elements, usually considered ranging from atomic number 89 to atomic number 103 on the periodic table, have interesting properties, and play a key role in nuclear chemistry.
The correct option is D. Group 14 are metalloids and they contain both metals and non metals.
What are metalloids ?The lowest class of elements, known as the metaloids, only has six members: the elements boron, silicon, germanium, arsenic, antimony, and tellurium (Te). Metalloids have both nonmetal and metal qualities, including the ability to conduct electricity (elements that cannot conduct electricity).
The majority of metalloids, for instance, may conduct electricity, though not as well as metals. Metalloids frequently have a metallic sheen but a nonmetal brittleness.
Depending on the quantity of valence electrons they contain, metalloids can behave chemically like metals or nonmetals.
Therefore, The correct option is D. Group 14 are metalloids and they contain both metals and non metals.
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does anyone know the known specific heat values for common materials
Answer:
Just look up specific heat capacity of a certain element and it should give you the specific heat in the form of energy/mass×temperature i.e J/kg°C (joules per kilogram, and degrees celsius).
What are 10 metallic elements
Answer:
The metals list which makes up the periodic table includes iron, lead, gold, aluminum, platinum, uranium, zinc, lithium, sodium, tin, silver, etc.
Explanation:
Answer:
iron, lead, gold, aluminum, platinum, uranium, zinc, lithium, sodium, tin, silver
Explanation:
How many moles are in 45 g of H20?
Answer:
The answer is 18.01528.
Explanation:
This compound is also known as Water or Dihydrogen Monoxide. The SI base unit for amount of substance is the mole.
In your own words, explain what the concept of density means—without using the formula.
Answer:
The amount of mass in a certain volume
Explanation:
Answer:
Density is mass divided by volume. Density is the determination of something floating or sinking.
Hope this helps!!!
You run into your friend while ice skating and both of you fall in opposite directions. Newton's 1st Law
Newton's 2nd Law
Newton's 3 Law
Law of Universal Gravitation
Law of Conservation of Momentum
Answer:
Newtons Third Law
Explanation:
His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.
Identify each pair of elements as likely to participate in ionic bonding when bonded together. Use your periodic table.
1. Sodium & Chlorin (NaCI) :
2. Carbon & Oxygen (CO2):
3. Hydrogen & oxygen (H2o)
4. Iron & oxygen (Fe2o3):
5. Magnesium & Sulfur (MgS):
Answer:
1) NaCl, 5)MgS
Explanation:
What makes something an Ionic Bond:
Ionic bonds are generally between two oppositely charged ions. Usually salts are formed. A metal and nonmetal are also generally considered to be ionic. Electronegativity also plays a role in a difference of electronegativity of elements being greater than 2.0.For 1) Na has a charge of 1+ and Cl has a charge of 1-. They both come together to form table salt. Their electronegativity is also larger than 2.0. Also Na is a metal and Cl ion is a nonmetal.
For 2) C and O are both nonmetals and are covalent bonds
For 3) Water is a polar covalent molecule because there is a electronegativity difference between H and O, but not great. H and O are also nonmetals.
For 4) While Fe is a metal and O is a nonmetal, their electronegativity difference is not greater than 2.0. This makes it polar covalent.
For 5) Mg is a metal and S is a nonmetal. They have a large electronegativity difference. Also Mg has a charge of 2+ while S has a charge of 2-.
Which of the following words means "the thing from which something else comes"?
a. fusion; b. source; c. attraction; d. force
Answer:
b. source
Explanation:
The source is where something comes from. i.e. The source of sunlight is the sun.
Answer:
PLZ HELP ME. This is my second time posting my question because the first time a person put a random answer. If you do not know the question please do not answer it and leave it to someone else. Thank you, and my question is on the attached image below
Explanation:
PLZ HELP ME. This is my second time posting my question because the first time a person put a random answer. If you do not know the question please do not answer it and leave it to someone else. Thank you, and my question is on the attached image below.
ng from which something else comes"?a. fusion; b. source; c. attraction; d. forcehehehhehehehheheh teehee
When one mole of a solute is present in 500 cm3 of solution, then the concentration of the solution is:
.)0.5 M
.)1 M
.)2 M
.)3 M
Answer:
0.5M is the answer.
Explanation:
1M solution is the solution containing 1mole solute dissolved per litre of solution.
Using unitary method,
1000cc gives 1M.
1cc gives 1/1000M.
500 cc gives 500/1000M=0.5M
How many significant figures are in 100 L?
Answer:
there is only 1 significant figure in 100l
How many moles of Magnesium( Mg) are in 0.250 Kg of Mg?
Answer:
0.010285949393128987
Explanation:
I just used a conversion calculator
The concept of moles is a fundamental unit of measurement in chemistry that helps quantify the amount of a substance. There are approximately 10.28 moles of magnesium in 0.250 kg of Mg.
The mole (mol) is a unit used to express the number of entities, such as atoms, molecules, or ions, in a sample of a substance. One mole is defined as the amount of a substance that contains as many entities as there are atoms in exactly 12 grams of carbon-12.
The number of entities in one mole is known as Avogadro's number, which is approximately 6.022 x 10²³. This means that one mole of any substance contains approximately 6.022 x 10²³ entities.
To calculate the number of moles of magnesium (Mg) in 0.250 kg of Mg, we need to use the molar mass of magnesium and the given mass.
The molar mass of magnesium (Mg) is approximately 24.31 grams per mole (g/mol).
First, we need to convert the given mass from kilograms (kg) to grams (g):
[tex]0.250 kg * 1000 g/kg = 250 g[/tex]
Now we can use the molar mass to calculate the number of moles:
Number of moles = Mass (g) / Molar mass (g/mol)
[tex]=0.250 kg * 1000 g/kg = 250 g[/tex]
Therefore, there are approximately 10.28 moles of magnesium in 0.250 kg of Mg.
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please help me ASAP
Which of the following is NOT an indicator of chemical change?
a. color change
b. bubbles
c. change in properties
d. no change of substance (change of state only)
Answer:
answer will be Dchange of state only
Witch element is the number 14 on the periodic table
Answer:Silicon
Explanation:
Silicon - Element information, properties and uses | Periodic Table.
Royal Society of Chemistry › 14 › si...
Silicon - Element information, properties and uses | Periodic Table
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Which best describes a mixture? It has a single composition, and it has a set of characteristics that does not change. It can have different compositions, but it has a set of characteristics that does not change. It has a single composition, but it has a set of characteristics that does change. It can have different compositions, and it has a set of characteristics that does change.
Answer:
option 4 - it can have different compositions, and it has a set of characteristics that change.
Mixture is defined to have different compositions, and it has a set of characteristics that does change.There are 2 types of mixtures:1) homogenous mixtures 2)heterogenous mixtures
What are heterogenous mixtures?
Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.
As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.
Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.
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Do you think organ systems function independently of themselves, or do you think
they interact with other organ systems? Explain your reasoning.
Each organ system performs specific functions for the body, and each organ system is typically studied independently. However, the organ systems also work together to help the body maintain homeostasis. For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance.
In the core of the sun, nuclear fusion combines hydrogen atoms to make helium atoms. What can you infer about helium from this?
A-Helium is lighter than hydrogen.
B-Helium is heavier than hydrogen.
C-Helium is heavier than oxygen.
D-Helium is heavier than carbon.
Answer:
My answer would be
B.
Explanation:
Although helium is twice as heavy as (diatomic) hydrogen, they are both significantly lighter than air, making this difference negligible. The lifting power in air of hydrogen and helium can be calculated using the theory of buoyancy as follows: Thus helium is almost twice as dense as hydrogen.
Answer:
It is lighter.
how many atoms are in CuAI6PO4(OH)8
Answer: 5 atoms
Explanation:
help pls!!
What is the difference between physical change and chemical change?
Answer:
The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question. In a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition
Hope this helped! :) Have a wonderful day/night!
Plz help!
What is 1 item that is an element?
Give an example of how the 1 item is an element
A student measures the mass of an 8 cm^3 block of brown sugar to be 12.9 g. What is the density of
the brown sugar?
Answer:
1.6125 g/cm^3
Explanation:
Density= mass/volume
Which word part means cold?
crylo
chem/
cis/o
cyan/
Please answer correctly !!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!
Betsy created the following mnemonic device to help her remember the order of the planets starting from the Sun: “Most Very Elegant Mammals Sleep Just Until Noon”. Why doesn’t her mnemonic work?
Answer:
She has Saturn and Jupiter in the wrong order.
Explanation:
why is the quantity of each subatomic particle important
Answer:
they determine what element it is, and what charge it will be.
Explanation:
the amount of neutrons determines the mass of the atom
the amount of protons determines the element of the atom
the amount of electrons determines the charge of the atom
What is the difference between the atomic number and the atomic mass?
Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element's nucleus. It is the average weight of an element. It is the total number of nucleons in the atom's nucleus.
Explanation:
Hope this helps have a great day its kinda hard to put it in one sentence so uhh just read this and make it into one sentence
Answer:
atomic number is equal to no.of protons or no.of electrons and no.of neutros+atomic num=atomic mass
Explanation:
in above give the correct explanation
Consider the decay of carbon 14 what changes between the parent and the daughter nuclide and what remains the same and what nuclide is more stable
Answer:
there is no change in mass
Explanation
ye
Decay of carbon-14 will forms a daughter nuclide with same mass by emitting the one beta. The resulting daughter nuclei have a lower mass and are lower in energy (more stable) than the parent nucleus that decayed.
What is radioactive decay?The two general kinds of nuclear reactions are nuclear decay reactions and nuclear transmutation reactions. In a nuclear decay reaction, also called radioactive decay,
The radioactive decay of carbon-14 is as shown bellow
C¹⁴ → N¹⁴ + β−
The carbon-14 atoms undergo beta-minus decay and produce a beta particle and a nitrogen-14 atom.
Beta means, an electron.
The radioactive decay is also same as the normal reaction in organic, inorganic. Reaction is always follows the law of conservation of mass. Total mass of left hand side is equal to right hand side.
In radioactive decay, beta, gamma, alpha partical is the byproduct
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