The initial and final molarity are 0.860 molars and 0.694 molars, respectively.
How to calculate molarity in a solution
In chemistry, molarity ([tex]M[/tex]), in molars, is described by the following expression:
[tex]M = \frac{n}{V}[/tex] (1)
Where:
[tex]n[/tex] - Molar amount of the solute, in moles[tex]V[/tex] - Volume of the solution, in litersThe molar amount of the solute is determined by this formula:
[tex]n = \frac{m}{M}[/tex] (2)
Where:
[tex]m[/tex] - Mass of the solute, in grams[tex]M[/tex] - Molar mass, in moles per gramsIf we know that [tex]m = 17.1\,g[/tex], [tex]M = 397.64\,\frac{g}{mol}[/tex], [tex]V_{1} = 0.050\,L[/tex] and [tex]V_{2} = 0.062\,L[/tex], then the initial and final molarities are, respectively:
[tex]n = \frac{17.1\,g}{397.64\,\frac{g}{mol} }[/tex]
[tex]n = 0.043\,mol[/tex]
Initial molarity[tex]M_{1} = \frac{0.043\,mol}{0.050\,L}[/tex]
[tex]M_{1} = 0.860\,M[/tex]
Final molarity[tex]M_{2} = \frac{0.043\,mol}{0.062\,L}[/tex]
[tex]M_{2} = 0.694\,M[/tex]
The initial and final molarity are 0.860 molars and 0.694 molars, respectively. [tex]\blacksquare[/tex]
RemarkThe statement is incomplete, complete form is described below:
A student correctly determines that 17.1 grams of sucrose are needed to make 50 ml of a 1m sucrose solution. when making the solution in the lab, the student measured 50ml of solution and then adds the 17.1 grams of sucrose to the beaker. the student’s resulting solution was not 1m as intended. after the student mixed the solution, the resulting solution was measured at 62ml. What are the initial and final concentrations of the solution?
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finish the equation. must be balanced with phases. please help
Answer: 2Li+(aq) + SO42-(aq) + Ca2+(aq) + 2NO3-(aq) = 2Li+(aq) + 2NO3-(aq) + CaSO4(s)
Explanation:
Li2SO4 + Ca(NO3)2 → LiNO3 + CaSO4
Lithium Sulfate + Calcium Nitrate = Lithium Nitrate + Calcium Sulfate
Balanced:
Li2SO4 + Ca(NO3)2 → 2LiNO3 + CaSO4
Write the state for each molecule if as aqueous, solid or liquid. All nitrates are normally soluble and sulfates are also soluble with few exceptions which are partially soluble.
2Li+(aq) + SO42-(aq) + Ca2+(aq) + 2NO3-(aq) = 2Li+(aq) + 2NO3-(aq) + CaSO4(s)
Walruses live in very cold regions. Unlike many animals that live in cold regions, walruses do not have a thick coat of fur to insulate their bodies and keep them warm. Which of the following characteristics most likely allows the walrus to survive in extremely cold temperatures? A. Walruses store fat and have a thick layer of blubber. B. Walruses have short, bristled whiskers on their faces. C. Walruses have an air sac in their throats that allows them to float in water. D. Walruses have two tusks that can grow to over a meter long.
Answer:
d is the right anwer
Explanation:
Natural resources are distributed ____across the Earth.
Question 2 options:
underground
safely
easily
unequally
Answer:
unequally
Explanation:
this is because many different physical factors vary massively over the earth
The molar mass of PdCl2 is The molar mass of PdCl2 is
Answer:
176.9 g/mol
Explanation:
You have to add the molar masses of the constituent atoms. The molar mass of palladium is 106.42 g/mol and the molar mass of chlorine is 35.45g/mol so 106 + 2(35.45) = 176.9 g/mol
How much of the 0.2M stock solution of NaCl did you need to make a 100mL
dilution of NaCl at final concentration 0.05M? Please give your answer in units of
MILLILITERS, however do not explicitly include any units in your answer.
The amount of 0.2 M stock NaCl that would be required to make 100 mL, 0.05 M NaCl would be 25 mL
DilutionUsing the equation of dilution:
M1V1 = M2V2
In this case, M1 = 0.2M, V1 = ?, M2 = 0.05 M, V2 = 100 mL
V1 = M2V2/M1
= 0.05 x 100/0.2
= 25 mL
The volume of the stock solution needed is 25 mL
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(05.03 LC)
How many atoms of hydrogen are there in one molecule of water, if the chemical formula is H2O?
OO
오
01
02 03
Help me out ? I'm not sure of my answer.
Answer: It is possible. Chlorine reacts with potassium bromide to form potassium chloride and bromine.
Consider the following reaction: 3NH,NO,
Na PO, (NH), PO, + 3NaNO,
Assuming we started with 30 grams of
ammonium nitrate and 50 grams of sodium
phosphate. Which of the reagents is the
limiting reagent?
Answer:
installe mo TRUE ID
Explanation:
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The pH of a basic solution is 9.77. What is [OH⁻]?
The [OH⁻] of the solution is 5.37×10⁵ M.
What is pOH?This is the negative logarithm to base 10 of hydroxy ion [OH⁻] concentration.
To calculate the hydroxy ion [OH⁻] concentration we use the formula below.
Note:
pH+pOH = 14pOH = 14-pHpOH = 14-9.77pOH = 4.27Formula:
[OH⁻] = 1/[tex]10^{pOH}[/tex]................. Equation 1Given:
pOH = 4.27Substitute the value into equation 1
[OH⁻] = 1/[tex]10^{4.27}[/tex][OH⁻] = 5.37×10⁵Hence, The [OH⁻] of the solution is 5.37×10⁵ M.
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The concentration of the hydroxide ion [OH¯] in the solution is 5.89×10¯⁵ M
How to determine the pOHFrom the question given above, the following data were obtained:
pH = 9.77pOH =?pH + pOH = 14
9.77 + pOH = 14
Collect like terms
pOH = 14 – 9.77
pOH = 4.23
How to determine [OH¯]pOH = 4.23Concentration of Hydroxide ion [OH¯] =?pOH = –Log [OH¯]
4.23 = –Log [OH¯]
Multiply through by –1
–4.23 = Log [OH¯]
Take the anti-log of –4.23
[OH¯] = anti-log (–4.23)
[OH¯] = 5.89×10¯⁵ M
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Please answer this question according to the image below
for the molecule shown below, please answer the following questions.
1. how many carbon atoms are there?
2. how many p-orbitals are involved in π bonds in this molecule?
3. how many Ione pairs of electrons must be added?
4. how many formal positive charges must be added?
When we show the structure of a molecule, we see the arrangement of atoms in the molecule.
Structure of moleculesThe structure of a molecule shows the arrangement of atoms in the molecule.
1) There are 24 carbon atoms in the molecule.
2) There are 30 p- orbitals that are involved in pi bonds in the molecule.
3) We need to add 22 lone pairs of electrons
4) We do not need to add any formal positive charge to the molecule.
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Radioactive iodine, lodine 131, is used in Thyroid cancer therapies. Its half life is 8
days. If a patients is given a total dose of 1 gram of lodine 131, how much will be
left in the patients blood stream after 32 days? *include units*
PLSS HELP!!
Answer: 0.0625 grams left in the patients blood stream
Explanation:
half life formula: A = o(1/2)^t/d
A represents answer, o represents original amount of iodine used, t represents time iodine is used for, d represnts half life of iodine.
A = 1(1/2)^32/8
A = 0.0625 grams left in the patients blood stream
Help me with this question
[tex]\Large \text{1)}[/tex]
[tex]\textbf{Use the formula and substitute the values}[/tex]
[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]
[tex]\textbf{Solve for the number of moles}[/tex]
[tex]n = 0.003\ mol[/tex]
[tex]\textbf{Calculate final volume }[/tex]
[tex]40+10=50\ mL[/tex]
[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]
[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]
[tex]\Large \text{2)}[/tex]
[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]
[tex]\displaystyle DF=\frac{50}{10}=5[/tex]
Best definition of chemistry
Answer:
its a branch of science which deals with chemical and atomaic molecules
Answer:
Chemistry is the study of matter, it properties and the changes that matter undergoes.
Using the data in the chart, which of the following would be a correct analysis? x values y values 0 4 1 8 2 16 3 24 The data indicates a direct relationship with a negative slope. The data indicates a direct relationship with a positive slope. The data indicates no particular pattern, which will make it difficult to graph. The data indicates that you would not be able to draw a "best fit" line.
The data indicates a direct relationship with a positive slope.
What is direct relationship?Direct relationship is a type of relation in which if one factor increases the other will also increases and vice versa. This data represents direct relationship because the increase occur in one value causes increase of another value so we can conclude that the data indicates a direct relationship with a positive slope.
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What is the molarity of a solution that contains 4.50 mol of NaF dissolved in 750.0 mL of solution
Answer:
6.00 Ml
Explanation:
I hope this helps
What is the name for Mg2PO3?
Purchasing the correctly sized BMX bike is based on the height of the rider. In order to fit a customer, the salesman can use the equation b=0.29h+1.35 where b is the size of the BMX bike frame in inches and h is the height of the rider in inches.
1. As a rider increases one inch in height, the bike frame increases 0.29 inches.
2. The height of the rider gets multiplied by 0.29.
3. The bike frame increases 0.29 inches for every 1.35 inches of the rider's height.
4. As a rider's height increases 1.35 inches, the bike frame increases one inch.
Plants can cause which type of weathering? physical weathering chemical weathering both physical and chemical weathering
Answer:
Both physical and chemical
Explanation:
Plants are able to release toxins and show withering through stages. When a plant has a certain smell, it means it is going through a chemical change, but when you see a plant turning brown, it goes through a physical change.
If a solution has a concentration of 12 M when the volume is 150 mL. What is the new concentration if you increase the volume to 600 mL? (1
sig fig)
M
Answer:
The idea with diluting a solution is that the number of moles of solute will remain constant after the initial solution is diluted. The only ...
Explanation:
hope it helps you
Formation of Ionic bond
1. Formation of magnesium fluoride.
Answer:
Magnesium fluoride is prepared from magnesium oxide with sources of hydrogen fluoride such as ammonium bifluoride: MgO + (NH4)HF2 → MgF2 + NH3 + H2O. Related metathesis reactions are also feasible. The compound crystallizes as tetragonal birefringent crystals.
How many cookies are there in one mole of cookies?
what's the full question so i can give you an answer?
the number of carbon atoms in 2 moles of carbon?
Answer:
1232.896 carbon atoms
Explanation:
In one mole of carbon, there are 6.02×1023 atoms. So in two moles, there will be : 1.204×1024 .
1232.896 carbon atoms
hope this helps
If a gas is initially at a pressure of 1.56 atm and has a volume of 556 mL, what is the pressure if the balloon is compressed to a volume of 224 mL
Answer:
The answer for the final volume is essentially the same if we converted the 1,775 torr to atmospheres: Using Boyle's law: (1.56 atm)(7.02 L) = (2.335 atm) × V f; 02 L) 2 . 336 at
which weather would create the largest surfing waves?
Answer:
I think It Is C
Explanation:
Im really sry if i am wrong
What is the relationship between the number of molecules and the mass of 22.4 L of different gases at STP?
The volume occupied by one mole of gas at stp is known as the standard molar volume of a gas. It has been found to be 22.41410 L. According to Avagadro's law, one mole of any gas will occupy the same volume as one mole of any other gas at the same temperature and pressure, despite mass difference. Knowing the volume of gas, you can use 1 mol/22.4L as a conversion factor to find the number of moles, and therefore the mass, of a given volume of a given gas at STP.
Behaviour of gases:
In gases, the molecules are far apart and mutual interaction amongst the molecules are negligible except when they collide.At low temperature and high pressure, the gases follow a simple reaction:ㅤㅤㅤ ➝ PV = KT
Question 5(Multiple Choice Worth 5 points)
(01.02 LC)
A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?
O Length
O Mass
O Temperature
O Volume
Answer:
volume
Explanation:
this is because gallon is a unit of volume.
pls give brainliest
The property of the gas that was used by the chemist's report is volume. The correct option is D.
What is volume?
Volume is a scalar quantity that is used to measure the space occupied by a three-dimensional object. In terms of liquid and gas, the volume is measured as the capacity of the container that contains a liquid.
Gas is a state of matter that has no regular shape and no fixed volume. They have the lowest density and their moles are farthest from each other.
Gallon is a unity of volume that is used in the metric system of the United States. There are 100 gallons of gas in the container, the volume of gas is the total number of moles of the gas in a container.
Thus, the correct option is D. Volume.
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What threatens the health of coral reefs? (Select all that apply.) increased diversity of coral polyp species coastal land development silt runoff ocean water pollution damage from scuba diving, boating, and fishing
Corals are a key part of world's diversity .
I have done the quiz so here is the answer:
coastal land development
ocean water pollution.
damage from scuba driving, boating and fishing.
Did you answer question 2 ?
9. A strong acid is used as a titrant against a weak base. What would be the most likely pH for the equilibrium point? A.2.1 O B. 7.0 O C.8.2 O D. 6.6
D. 6.6
Strong acid pH range < 3
weak base pH range 8-11
A strong acid is used as a titrant against a weak base. The most likely pH for the equilibrium point will be 6.6.
What is pH?pH, a scale that quantifies the acidity as well as basicity of liquid solutions that are aqueous or other.
What is acid?Any acid which entirely ionizes in solutions would be considered a strong acid. This indicates that when dissolved in a solution, it emits the most hydrogen ions as well as protons.
The pH will not neutral there at an equivalence point when a weak base is compared to a strong acid. The solution is just in fact acidic (pH ≅ 6.6) there at the equivalency point.
Therefore, the correct answer will be option (D).
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1. A 35.3 g of element M is reacted with nitrogen to produce 43.5 g of compound M3N2 What is (i) the molar mass of the element and (ii) name of the element?
1. The molar mass of the element M is 40 g/mol
2. The name of the element is calcium (Ca)
Description of mole
The mole an element is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
How to determine the mass of nitrogen Mass of M = 35.3 gMass of compound = 43.5 gMass of nitrogen =?Mass of nitrogen = 43.5 – 35.3
Mass of nitrogen = 8.2 g
1. How to determine the molar mass of MMass of nitrogen = 8.2 gMolar mass of nitrogen = 14 g/mol Formula of compound = M₃N₂Mole ratio of M to nitrogen = 3 : 2Mass of M = 35.3 gMolar mass of M = y =?Mole of M : Mole of nitrogen = 3 : 2
35.3 / y ÷ 8.2 / 14 = 3 : 2
(35.3 / y) × (14 / 8.2) = 3 / 2
494.2 / 8.2y = 3 / 2
Cross multiply
8.2y × 3 = 494.2 × 2
24.6y = 988.4
Divide both side by 24.6
y = 988.4 / 24.6
y ≈ 40 g/mol
Thus, the molar mass of the element is 40 g/mol
2. How to determine the name of the element Molar mass of element = 40 g/mol Name of element =?From the periodic table, the element having a mass number of 40 is Argon and Calcium. Since argon will not react with nitrogen to produce Ar₃N₂.
Therefore, we can conclude that the element is calcium since it can react with nitrogen as illustrated by the equation
3Ca + N₂ —> Ca₃N₂
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