Answer:
It is a mixture
Explanation:
Because it mixes chocolate, milk, sugar, and vanilla to make it sweet and not taste like plain cocoa powder.
Devin investigated whether salt reduces the boiling point of water. She poured 1 gallon of 18
degrees Celsius (°C) water into a pot and added 2 cups of salt to it. Devin heated it over a fixed
flame and measured the temperature when the water reached a rolling boil. She repeated the
experiment with 1 gallon of water and 4 cups of salt under identical conditions. Where did Devin
make a mistake in her experimental design?
Answer:
D. She did not heat the pots of water at the same time.
Explanation:
The water of the first pot was a different temperature before boiling than the second pot.
Plz help!
What is 1 item that is an element?
Give an example of how the 1 item is an element
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:
Please answer correctly !!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!
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)
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.
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:
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
Which of the following would form a precipitate in a reaction?
LiCl
ZnSO4
NaOH
CaSO4
Answer:
NaOH
Explanation:
Precipitation reaction can be used in wastewater treatment. When a contaminant forms an insoluble solid, then we can use this reaction to precipitate out the contaminated ions. In wastewater, a frequent presence of heavy metals can be found such as compounds of sulphide and hydroxide. So, we can add a source of hydroxide that is soluble (NaOH Or Na2S) that will result in a precipitation reaction.
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!
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.
To learn more about metalloids, refer to the link:
https://brainly.com/question/2548493
#SPJ2
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!!!
3. The Solar Nebula Theory states that the Sun and all objects in the Solar System were
formed when a cloud of gas and dust (a nebula) collapsed. What observational
evidence supports this theory?
a. Most of the icy objects are located closer to the Sun than Jupiter
b. The inclination of the orbits is larger for objects near the Sun than for far away
objects
C. Most objects have orbits that are highly elliptical
d. Most objects orbit in the same direction
Answer:
C or B(most likley C)
Explanation:
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
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:
Which word part means cold?
crylo
chem/
cis/o
cyan/
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.
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.
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.
Learn more about heterogenous mixtures,here:
https://brainly.com/question/24898889
#SPJ6
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
how many atoms are in CuAI6PO4(OH)8
Answer: 5 atoms
Explanation:
How many significant figures are in 100 L?
Answer:
there is only 1 significant figure in 100l
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
What are the trends for the difference between atomic radii and ionic radii for cations and anions?
Answer:
Explanation:
In a neutral atom, the atomic and ionic radius is the same, but many elements exist as anions or cations. If the atom loses its outermost electron (positively charged or cation), the ionic radius is smaller than the atomic radius because the atom loses an electron energy shell
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
To find more about Nuclear fussion. structure, refer the link below:
brainly.com/question/25455333
#SPJ2
in the periodic table the atomic number represents
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-.
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.
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]
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.
For more details regarding molar mass, visit:
https://brainly.com/question/31545539
#SPJ6