Taking into account the definition of dilution, the new concentration of the solution is 0.2567 M.
First of all, you have to know that dilution is the reduction in concentration of a chemical in a solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volumeof the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentration Vi: initial volume Cf: final concentration Vf: final volume
In this case, you know:
Ci= 0.385 M Vi= 600 mL= 0.600 L (being 1000 mL= 1 L) Cf= ? Vf= 900 mL= 0.900 LReplacing in the definition of dilution:
0.385 M× 0.600 L= Cf× 0.900 L
Solving:
Cf= (0.385 M× 0.600 L)÷ 0.900 L
Cf= 0.2567 M
In summary, the new concentration of the solution is 0.2567 M.
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brainly.com/question/20113402?referrer=searchResults brainly.com/question/22762236?referrer=searchResultsThe Lewis electron-dot structure of oxygen has how many dots?
Answer:
Oxygen has 6 valence electrons and follows the octet rule.
If you were drawing a lewis structure for O2, there would be a total of 12 valence electrons (6 x 2 = 12).
The completed structure would have a double bond between the two oxygen atoms with 2 lone pairs per oxygen, giving you a total of 8 electrons that are lone pairs (or dots).
what mass of water (in grams) is produced by the reaction of 23.0 g of SiO2?
The mass of water produced by the reaction of the 23 g of [tex]SiO_2[/tex] is 13.8 g.
The given chemical reaction;
[tex]4Hf (g) \ + \ SiO_2 (s) \ --> \ SiF_4(g) \ + \ 2H_2O(l)[/tex]
In the given compound above, we can deduce the following;
molecular mass of [tex]SiO_2[/tex] = 28 + (2 x 16) = 60 gmolecular mass of [tex]2H_2O[/tex] = 2(18) = 36 g60 g of [tex]SiO_2[/tex] --------- 36 g of water
23 g of [tex]SiO_2[/tex] ------------- ? of water
[tex]mass \ of \ water = \frac{23 \times 36}{60} = 13.8 \ g \ of \ water[/tex]
Thus, the mass of water produced by the reaction of the 23 g of [tex]SiO_2[/tex] is 13.8 g.
"Your question is not complete, it seems to be missing the following information";In the reaction of the given compound, [tex]4Hf (g) \ + \ SiO_2 (s) \ --> \ SiF_4(g) \ + \ 2H_2O(l)[/tex], what mass of water (in grams) is produced by the reaction of 23.0 g of SiO2?
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A flask of water is sealed with a balloon and heated to various temperatures on a hot plate
Answer:
What is the question?
Explanation:
You just gave a statement.
Answer:
it will increase
Explanation:
how many gallons in one cubic foot?
Answer:
1cf gallon=7.481 us liquid gallon
the class of organic compound below contains a carbonyl group as a part of its structure?
Aldehydes and Ketones. Aldehydes and ketones are classes of organic compounds that contain a carbonyl (C=O) group.
that's the correct answer
can I get brainilest
A total solar eclipse occurs because the moon can totally block the sun. If the moon was smaller or farther from earth, a total eclipse
Could occur
Could not occur
Answer:
both
Explanation:
id say that it could occur but also not as much. the moon would be smaller and further from the earth to where we would barely be able to see it. if the full moon is barely visible then im sure the total solar eclipse wouldn't be as noticeable as it is now. but thats just my opinion
How many moles are in 29.5 grams of Ax?
A. 1.3 moles
B. 1.8 moles
C. 0.78 moles
D. 678 moles
The number of moles present in 29.5 grams of argon is 0.74 mole.
The atomic mass of argon is given as;
Ar = 39.95 g/mole
The number of moles present in 29.5 grams of argon is calculated as follows;
39.95 g ------------------------------- 1 mole
29.5 g ------------------------------ ?
[tex]= \frac{29.5}{39.95} \\\\= 0.74 \ mole[/tex]
Thus, the number of moles present in 29.5 grams of argon is 0.74 mole.
"Your question seems to be missing the correct symbol for the element"
Argon = Ar
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Calculate AH for the following reaction:
-
-
2NO2(g) → N204(9)
Use appropriate data from the following listing:
NO(g) + NO2(g) + O2(g) → N2O5(9) ΔΗ, = -113.7
NO(g) + NO2(g) → N2O3(g)
9
AH2 = -36.1
N205(9) ► N,05(s)
,
AH = -55.3
N2O3(g) + N2O3(s) -→ 2N204(9)
ΔΗ, = -8.100
2NO(g) + O2(g) → 2NO2(g)
ΔΗς = -112
Answer:
Explanation:
Looking at the above diagram, which side would be considered an acid AND explain how do you know this?
Answer:
The side with lots of H+ and low pH
Explanation:
Because one of the feature of an acid is the ability to dissociate to H+.
And it has lower pH because the concentration of H+ is more than OH-
How many atoms of Xe does 7.84 moles of Xe contain?
Is this equation balanced and in the lowest form?
4NH3 → 2N2 + 6H2
Answer:
It's balanced but not in the lowest form
Explanation:
The actual equation is given by
[tex]\\ \sf\longmapsto 2NH_3\longrightarrow N_2+3H_2[/tex]
96 POINTS
1. An atom of platinum has a mass number of 195 and an atomic number of 78. How many protons and neutrons are in this atom? – Calculate your answer and please note that work must be shown to earn credit.
neutrons=117
protons=78
Answer:
Platinum has mass number 195.
The atomic number of platinum =78
so the number of protons is 78.
By using simple formulas
we can find out that how many neutrons and protons are present in an atom of platinum-195.
Mass number = neutrons + protons
195=neutrons + 78
neutrons=195-78=117
so the number of neutrons is 117.
5 examples of Earth Surface .
Answer:
lithosphere (land)
hydrosphere (water)
biosphere (living things)
atmosphere (air).
define the term chemotherapy.
I'm not able to understand that what is written in the pic.. As I can't understand this language..
Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.
[EASY][50pt] Temperature vs Time Graph
5. In what state of matter does this substance exist at the 22 minute mark?
6.At what temperature does condensation occur?
7.What phase change occurs at 70C
#5
At 22min the temperature is at 40°C
So the matter is at solid state.#6
Graph ended at 20°C so condetion occured at 20°C
#7
After 70°C the matter got melted do its at liquid state
what is the importance of hydrogenation
Answer:
It improves the oxidative stability of the oil.
The hydrogenation process increases the melting point of the fat, which changes liquid oil into solid shortening.
Explanation:
PLEASE HELP!!!!! WILL GIVE BRAINLIEST!!!!
The answer should be A
VisibleVisible wave length visible wavelength of light that are emitted by Adams can be used to get Nate explosive devices remotely
What method would you use to separate sand from gasoline?
Answer:
Filtration (The process of separating liquids and solids)
Explanation:
Filtration works best when the solute isn't dissolved in the solvent. Basically like how you can filter dirt or sand from water. The opposite of this would be if water and sugar where mixed together you cannot unmix this duo with filtration but with the example given you can use the process of filtration to rid the gasoline of sand.
Which describes a chemical change? (Select all that apply.)
A new substance is created.
A phase change is occurring.
It is a permanent change.
It can be a physical change.
Explanation:
it is a permanent change
Answer: It is a permenat change
Explanation: Because you are creating it into something else and when it turns into that thing it stays like that permanatly.
Calculate the concentrations of all species in a 0.100 M Na2CO3 solution.
The concentrations of all species in a 0.100 M Na₂CO₃ are:
1. The concentration of Na⁺ in the solution is 0.2 M.
2. The concentration of CO₃²¯ in the solution is 0.1 M
We'll begin by writing the dissociation equation for Na₂CO₃. This is illustrated below:
Na₂CO₃(aq) —> 2Na⁺(aq) + CO₃²¯(aq)
Thus, the species in Na₂CO₃ are Na⁺ and CO₃²¯
From the balanced equation above,
1 mole of Na₂CO₃ contains 2 moles Na⁺ and 1 mole of CO₃²¯
1. Determination of the concentration of Na⁺.
From the balanced equation above,
1 mole of Na₂CO₃ contains 2 moles Na⁺
Therefore,
0.100 M Na₂CO₃ will contains = 2 × 0.1 = 0.2 M Na⁺
Thus, the concentration of Na⁺ in the solution is 0.2 M.
2. Determination of the concentration of CO₃²¯
1 mole of Na₂CO₃ contains 1 mole of CO₃²¯
Therefore,
0.100 M Na₂CO₃ will also contains 0.100 M CO₃²¯
Thus, the concentration of CO₃²¯ in the solution is 0.1 M
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Pure iron, Fe , can be produced from an ore called hematite, Fe2O3 , by reaction with carbon at high temperatures. 2Fe2O3+3C⟶4Fe+3CO2 How many tons of hematite must react with carbon if an iron company needs to make 49 tons of iron?
70 tons of hematite (Fe₂O₃) is needed to produce 49 tons of iron (Fe).
We'll begin by calculating the tons of hematite (Fe₂O₃) that reacted and the tons of Fe produced from the balanced equation. This is illustrated below:
2Fe₂O₃ + 3C —> 4Fe + 3CO₂
Molar mass of Fe₂O₃ = (56×2) + (16×3) = 160 g/mol
Mass of Fe₂O₃ from the balanced equation = 2 × 160 = 320 g
Divide by 907185 to express in ton
320 / 907185 = 0.000353 ton
Molar mass of Fe = 56 g/mol
Mass of Fe from the balanced equation = 56 × 4 = 224 g
Divide by 907185 to express in ton
224 / 907185 = 0.000247 ton
SUMMARYFrom the balanced equation above,
0.000353 ton of Fe₂O₃ reacted to produce 0.000247 ton of Fe.
Finally, we shall determine the tons of hematite (Fe₂O₃) needed to produce 49 tons of Fe. This can be obtained as follow:
From the balanced equation above,
0.000353 ton of Fe₂O₃ reacted to produce 0.000247 ton of Fe.
Therefore,
X ton of Fe₂O₃ will react to produce 49 tons of Fe i.e
X ton of Fe₂O₃ = [tex]\frac{0.000353 * 49}{0.000247} \\\\[/tex]
X ton of Fe₂O₃ = 70 tons
Thus, 70 tons of hematite (Fe₂O₃) is needed to produce 49 tons of Fe.
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What will happen to the pH of sodium bicarbonate if vinegar is added to it?
Answer:
The overall chemical reaction between baking soda (sodium bicarbonate) and vinegar (weak acetic acid) is one mole of solid sodium bicarbonate reacts with one mole of liquid acetic acid to produce one mole each of carbon dioxide gas, liquid water, sodium ions, and acetate ions. The reaction proceeds in two steps
What are acids ? Will they harm skin
Hydrochloric acid can cause damage if it comes into contact with your lungs, eyes, stomach, or skin. If hydrochloric acid comes into contact with your skin, it can cause: chemical burns. scarring.
what happens when co2 dissolves in water
In this experiment you are directed to add a limited amount of NaOH (aq) and then an excess amount. A similar strategy will be used with the addition of NH3(aq). Why? Group of answer choices Both NaOH and NH3 are weak bases. Both NaOH and NH3 are strong bases. Initially a metal hydroxide may form which becomes soluble when more base is added and the metal complex forms. Insoluble metal complexes are first formed which then are replaced by insoluble metal hydroxide precipitates. Initially a complex ion may form which becomes insoluble when more base is added and the metal hydroxide precipitate forms.
The reason for adding a limited amount and then an excess amount is that initially a metal hydroxide may form which becomes soluble when more base is added and the metal complex forms.
In qualitative analysis is a common to add the base in drops and then in excess. When added in drops, the metal hydroxide is formed. This metal hydroxide is often insoluble.
After this metal hydroxide is formed, the base could be added in excess such that the metal hydroxide dissolves in the excess base by forming a complex.
For instance;
CuCl2(aq) + 2NaOH(aq) -------> Cu(OH)2(s) + 2NaCl(aq)
Cu(OH)2(s) + 2OH^-(aq) -------> [Cu(OH)4]^2+(aq)
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Is the molecule H2+ stable?
Answer: yes it is
Explanation:Bond order
The antibonding orbital is empty. Thus, H2 is a stable molecule
Which characteristic do valence electrons indicate about reactions between atoms? (1 point)
o electronegativity difference
o absolute electronegativity
o bond type
o bond number
The characteristic of reactions that depends on valence electrons is the bond type.
In chemistry, a chemical bond could be;
IonicCovalentThe type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.
When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.
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Answer:
D: bond number
Describe how you could show by adding aqueous sodium hydroxide and aqueous ammonia that a solution contained zinc ions.
Result with sodium hydroxide
Excess sodium hydroxide
Result with aqueous ammonia
Excess aqueous ammonia
Answer:
*result with sodium hydroxide: white ppt of Zn(OH)2
*excess sodium hydroxide: Precipitate dissolves to form a COLOURLESS solution
*Result with Aqueous ammonia: White ppt of Zn(OH)2
*excess aqueous ammonia: Precipitate dissolves to form a COLOURLESS solution
Write the full electron configuration for a Ca+ ion.
Answer:
[Ar] 4s²
Explanation:
The full electron configuration for the Ca+ ion is:
1s² 2s² 2p⁶ 3s² 3p⁶.
How to determine the electron configuration for the Ca+ ionTo determine the full electron configuration for a Ca+ ion, we need to remove one electron from the neutral calcium atom (Ca). The neutral calcium atom has the electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².
When Ca loses one electron to form the Ca+ ion, the electron removed comes from the highest energy level, which is the 4s orbital.
Therefore, the full electron configuration for the Ca+ ion is:
1s² 2s² 2p⁶ 3s² 3p⁶.
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1. What is the shape of an organic molecule containing a triple bond with respect to the carbons on either side of the bond?
Explain your answer
Answer:
The alkyne is linear
Explanation:
Any molecule with a triple bond is considered an alkyne. In regards to the shape, because carbon can only bond to 4 different atoms at once a triple bond fills in 3 of the required 4 atoms needed to reach the molecules ground state (when it's most stable). The more electrons shared between atoms, the shorter the bond will be which results in a stronger and more linear line. Keep in mind a quadruple bond is not possible between carbons as of now.