Answers
The Volume of Na₂CO₃ solution required to obtain 0.650 moles of Na⁺ ions is 216 mL.
What is the number of moles sodium ions produced by the dissociation of 1 mole of Na₂CO₃?The number of moles sodium ions produced by the dissociation of 1 mole of Na₂CO₃ is determined from the dissociation equation of Na₂CO₃ given below:
Na₂CO₃ (aq) → 2 Na⁺ (aq) + CO₃²⁻ (aq)
From the equation above, 1 mole of Na₂CO₃ produces 2 moles of Na⁺ ions.
Number of moles of Na₂CO₃ that will produce 0.650 moles of Na⁺ ions = 0.650/2 moles
Number of moles that will produce 0.650 moles of Na⁺ ions = 0.325 moles of Na₂CO₃ solution.
Volume of Na₂CO₃ solution required = moles of Na₂CO₃/molarityVolume of Na₂CO₃ solution required = 0.325/1.5
Volume of Na₂CO₃ solution required = 0.216 L
Volume of Na₂CO₃ solution required in mL = 216 mL
In conclusion, the volume of Na₂CO₃ solution required is obtained from the molarity and moles of Na₂CO₃.
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Related Questions
What is the name of an isotope having 29 protons and 23 neutrons? Write the elemental symbol and mass number of this isotope.
Answers
Answer:
copper - 52 (or Cu - 52)
⁵²Cu
Explanation:
Isotopes are different atoms of the same element that differ in the number of neutrons. Therefore, you can determine which element this is by examining the number of protons. All atoms with 29 protons are copper (Cu).
The mass number is the total number of protons and neutrons in an atom. Therefore, the mass number of this isotope is 52 (29 + 23 = 53). When writing an elemental symbol, the mass number is found on the top left.
As such, the name of this isotope is copper - 52 (or Cu - 52) and the symbol is ⁵²Cu.
129.13 mL of a 112.9 mM solution of NH4l is added to a 105.31 mL solution of 0.87 M Mgl2. What
is the final concentration of I ions in the resulting solution? Express your answer in units of
molarity using at least three significant figures.
Answers
The final concentration of I ions in the resulting solution is approximately 0.0311 M, expressed with three significant figures.
To determine the final concentration of I ions in the resulting solution, we need to consider the stoichiometry and volumes of the solutions being mixed.Given:
Volume of NH4l solution = 129.13 mL
Concentration of NH4l solution = 112.9 mM = 0.1129 M (converting from millimolar to molar)
Volume of Mgl2 solution = 105.31 mL
Concentration of Mgl2 solution = 0.87 M
First, we need to determine the moles of NH4l and Mgl2 in their respective solutions:
Moles of NH4l = Volume of NH4l solution * Concentration of NH4l solution
Moles of NH4l = 0.12913 L * 0.1129 M = 0.01459 moles NH4l
Moles of Mgl2 = Volume of Mgl2 solution * Concentration of Mgl2 solution
Moles of Mgl2 = 0.10531 L * 0.87 M = 0.09157 moles Mgl2
Next, we determine the limiting reagent, which is the reactant that is completely consumed and determines the maximum amount of product formed. In this case, the limiting reagent is NH4l because it has fewer moles than Mgl2.
The balanced chemical equation for the reaction between NH4l and Mgl2 is:
2 NH4l + Mgl2 → 2 NH4+ + MgI2
From the balanced equation, we can see that for every 2 moles of NH4l, we get 1 mole of MgI2.
Since the moles of NH4l is the limiting reagent, it will be completely consumed, and the moles of MgI2 formed will be half of the moles of NH4l.
Moles of MgI2 = 0.01459 moles NH4l * (1 mole MgI2 / 2 moles NH4l) = 0.007295 moles MgI2
Finally, we calculate the final concentration of I ions in the resulting solution:
Volume of resulting solution = Volume of NH4l solution + Volume of Mgl2 solution
Volume of resulting solution = 0.12913 L + 0.10531 L = 0.23444 L
Final concentration of I ions = Moles of MgI2 / Volume of resulting solution
Final concentration of I ions = 0.007295 moles / 0.23444 L = 0.0311 M
Therefore, the final concentration of I ions in the resulting solution is approximately 0.0311 M, expressed with three significant figures.
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what is the concentration of a nitric acid solution if 10.0 ml of the solution is neutralized by 3.6 ml of 0.2 m naoh?
Answers
Answer:
The concentration of the nitric acid (HNO3) solution is 72 M.
Explanation:
To determine the concentration of the nitric acid solution, we can use the concept of stoichiometry and the equation of the neutralization reaction between nitric acid (HNO3) and sodium hydroxide (NaOH):
HNO3 + NaOH → NaNO3 + H2O
The balanced equation shows that the molar ratio between HNO3 and NaOH is 1:1. This means that 1 mole of HNO3 reacts with 1 mole of NaOH.
Given:
Volume of HNO3 solution = 10.0 ml
Volume of NaOH solution = 3.6 ml
Molarity of NaOH solution = 0.2 M
To find the concentration of the HNO3 solution, we need to calculate the number of moles of NaOH used in the neutralization reaction:
moles of NaOH = volume of NaOH solution * molarity of NaOH solution
= 3.6 ml * 0.2 M
= 0.72 mmol (millimoles)
Since the molar ratio between HNO3 and NaOH is 1:1, the number of moles of HNO3 in the solution is also 0.72 mmol.
Now, we can calculate the concentration of the HNO3 solution using the formula:
concentration (in M) = moles of solute / volume of solution (in L)
concentration = 0.72 mmol / 0.010 L
= 72 mmol/L
= 72 M
Therefore, the concentration of the nitric acid (HNO3) solution is 72 M.
A bicyclist is stopped at the entrance to a valley, as sketched below. Where would the bicyclist have the highest potential energy? Where would The bicyclist have the lowest potential energy? Where would bicyclist have the highest kinetic energy? Where would the bicyclist have the highest speed winning? Conversation with the bicyclist’s Kinetic energy be higher at A or B? With a bicycle is potential energy be higher at A or B? What’s a bicyclist total energy we hire at A or B? Supposed to bicyclist lets off the brakes and coast down into the valley without peddling. Even if there was no friction or air resistance to slow her down, what is the farthest point the bicyclist could reach without peddling?
Answers
Step 1 - Understanding the relation of potential energy, kinectic energy and the conservation of energy
The potential energy is the energy related to a body that can start moving under the influence of a force anytime soon.
The kinf of potential energy depends on the force that could act on the body. When a body is lifted, because gravity can pull it back, we say that this body has gravitational potential energy
Kinetic energy, on the other hand, is related to actual movement. It depends on the mass as well as on the velocity of the body. When we lift an object and drop it next, all the potential energy will be converted to kinetic energy, i.e., the velocity of the object we dropped will be also proportional to the height. It cannot gain more energy.
Step 2 - Interpreting the problem
Now that we know how potential and kinetic energy work, we can start working on the problem. Since potential energy is directly proportional to height, the highest potential energy would be attained at F.
The lowest potential energy, on the other hand, woud be attained at D, i.e., the smaller height.
The highest kinetic energy would be attained when all the potential energy is converted to kinetic energy, i.e., when the bicyclist, starting at A, loses its potential energy reaching D
The speed is directly proportional to the kinetic energy: the higher the speed, the higher the kinetic energy. Since the kinetic energy, as we saw, is the greatest at D, the velocity will also be the greatest at this point.
What is the percent of C in Ca(C2H3O2)2?
(Ca = 40.08 g/mol, C = 12.01 g/mol, H= 1.01 g/mol, O= 16.00 g/mol)
[?]% C
Answers
The percent by mass of the carbon is 30.4%.
What is the percentage of calcium?The term percentage has to do with the ratio of the mass of a particular atom to the total mass of the compound multiplied by one hundred. Thus the first step is to find the total mass or the molar mass of the compound.
Molar mass = 40 + 2(2(12) + 3(1) + 2(16))
= 40 + 2(24 + 3 + 32)
= 40 + 2(59)
= 40 +118
= 158
Thus the mass of carbon is;
4(12)/158 * 100/1
= 30.4%
Thus carbon is only about 30.4% by mass of the compound.
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What was earth’s surface like? Landmasses? First land plants
Answers
Answer:
During the early Paleozoic Era, the Earth's surface was very different from what it is today. The continents were arranged differently, forming one large supercontinent called Pangea. This landmass was surrounded by a single large ocean called Panthalassa. The climate was much warmer and wetter than it is today, with no ice caps at the poles.
The first land plants, known as bryophytes, appeared during the early Silurian Period, around 430 million years ago. These plants were small and simple, lacking roots and vascular tissue. They grew in damp environments, such as along the edges of lakes and streams. They were important in the development of soils and in the colonization of land by other organisms, such as insects and other arthropods.
which of the following could be classified as producing a physical change?
Answers
Calculate the [OH−] and the pH of a solution with an [H+]=4.9×10−13 M at 25 °C .
[OH−]= M
pH=
Calculate the [H+] and the pH of a solution with an [OH−]=2.2×10−7 M at 25 °C .
[H+]= M
pH=
Calculate the [H+] and the [OH−] of a solution with a pH=8.66 at 25 °C .
[H+]= M
[OH−]= M
Answers
The [OH⁻] concentration is 1.9 × 10⁻² M and the [H⁺] concentration is 3.9 × 10⁻⁸ M
a) [ H⁺ ] = 4.9 × 10⁻¹³ M
pH = - log [ 4.9 × 10⁻¹³ ]
pH = 12.3
pH + pOH = 14
pOH = 14 - 12.3 = 1.7
pOH = -log [OH⁻]
[OH⁻] = 10^-1.7
= 1.9 × 10⁻² M
b) pOH = - log [ 2.2 × 10⁻⁷]
pOH = 6.6
pOH + pH = 14
pH = 7.4
pH = -log [H⁺]
[H⁺] = 10^-7.4
[H⁺] = 3.9 × 10⁻⁸ M
Thus, The [OH⁻] concentration is 1.9 × 10⁻² M and the [H⁺] concentration is 3.9 × 10⁻⁸ M
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Feeling happy today so here's 100 points for someone else to be happy!
Have a beautiful day or nighttttt
Good luck, y'all got this!
Answers
Answer:
You're the best
Explanation:
Have a great life
Concentrated aqueous perchloric acid is 70.5 wt% HClO4 and has a concentration of 11.7 M. Calculate the volume of concentrated perchloric acid that should be diluted to 1.90 L to form a 5.00 M HClO4 solution.
Answers
Answer:
0.812 L
Explanation:
As this is a dilution process problem, we can solve it by using the C₁V₁ = C₂V₂ formula, where in this case:
C₁ = 11.7 MV₁ = ?C₂ = 5.00 MV₂ = 1.90 LWe input the data:
11.7 M * V₁ = 5.00 M * 1.90 LAnd solve for V₁:
V₁ = 0.812 LThis means that 0.812 L of concentrated perchloric acid should be diluted to a final volume of 1.90 L.
6. How many moles are in 8.30 x 1023 molecules of CO₂?
a.
b.
C.
d.
1.37
2.8
55.5
100
Answers
prop-1-yne + 2HBr/H2O2 = A;
A + 2H2O = B;
B + K2CO3(aq) = C;
C + heat = D;
D + HBr = E.
find the compounds A, B, C, D and E
Answers
Based on the given reactions, the compounds are as follows:
A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.
B: The product formed when compound A reacts with 2H2O.
C: The product formed when compound B reacts with K2CO3(aq).
D: The product formed from the heat-induced reaction of compound C.
E: The product formed when compound D reacts with HBr.
Based on the given reactions, let's analyze the compounds involved:
Reaction 1: prop-1-yne + 2HBr/H2O2 = A
The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.
Reaction 2: A + 2H2O = B
Compound A reacts with 2H2O (water) to form compound B.
Reaction 3: B + K2CO3(aq) = C
Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.
Reaction 4: C + heat = D
Compound C undergoes a heat-induced reaction to form compound D.
Reaction 5: D + HBr = E
Compound D reacts with HBr (hydrobromic acid) to form compound E.
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Is 2.27x10-3 M acidic, basic or neutral
Answers
Answer:
acidic
Explanation:
As concentration is given we can find out pH using -log(concentration)
So input, -log(2.27X10^-3) and it gives us 2.644 (appx.)
according to the pH chart, pH value lesser than 7 refer to acidic substances. pH value 7 means neutral and pH value higher than 7 means basic. As 2.644 is less than 7, so it is acidic.
Define voltaic ???!!!
Answers
A voltaic cell is used to produce electrical energy with the help of chemical reactions.
What is a voltaic cell?Relating to, or producing direct electric current by chemical action.
A Voltaic Cell (also known as a Galvanic Cell) is an electrochemical cell that uses spontaneous redox reactions to generate electricity. It consists of two separate half-cells.
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Describe how the thermal energy moves when a can of soda is taken out of the refrigerator and left on a counter for hours.
Answers
Which diagram correctly describes the changes that occur as a small piece of rock falls from space and hits the earth
Answers
Answer:
the motion of gravity
Explanation:
Answer:
its c
Explanation
advhuosijoklxcmnjdabsuhggggabciaciudeifweingivg eygerigsygfe97rsghisdcvhbsduigwiugfu9uigdgiurfgyisdgfsdgfegiygewifgsdygfewusgfuyesigf7wgfiesgfiusgdfies
Which element has an outer energy level that is almost full of electrons? O radium O carbon O krypton O iodine
Answers
Explanation:
Hi, I think the answers Iodine.
hope it helps
Hydrogen reacts with oxygen according to the balanced equation
2H₂ (g) + O2(g) → 2H₂O(g). If X is the number of molecules of H₂ which react,
then the number of O2 molecules reacting is
Answers
Answer:
x/2
Explanation:
X = 2 molecules of H2
For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.
I hope I'm understanding this question right.
A metal gas cylinder is heated from 181 K to 296 K. If the original pressure was 256 psi, what is the pressure after heating also in psi?
Answers
Answer:
419 psi
Explanation:
Assuming the gas behaves ideally, we can solve this problem by using Gay-Lussac's law, which states:
P₁T₂=P₂T₁Where subscript 1 stands for the initial conditions and 2 for the final ones, meaning that in this case:
P₁ = 256 psiT₂ = 296 KP₂ = ?T₁ = 181 KWe input the data:
256 psi * 296 K = P₂ * 181 KAnd solve for P₂:
P₂ = 419 psiPLEASE HELP QUICKLY!!!
HI gas is removed from the system
at equilibrium below. How does the
system adjust to reestablish
equilibrium?
51.8 kJ + H₂(g) + 1₂(g) = 2HI(g)
A. The reaction shifts to the right (products) and the concentrations
of I, and H₂ decrease.
B. The reaction shifts to the left (reactants) and the concentrations
of H₂ and I increase.
C. The reaction shifts to the right (products) and the concentrations
of I, and H₂ increase.
D. The reaction shifts to the left (reactants) and the concentration of
HI increases.
Answers
Answer:
A. The reaction shifts to the right (products) and the concentrations of I and H₂ decrease.
Explanation:
If gas is removed from the system at equilibrium, the system will try to compensate for the loss by shifting the reaction in a direction that produces more gas molecules. This is known as Le Chatelier's principle, which states that a system at equilibrium will respond to a disturbance by shifting in a way that minimizes the effect of the disturbance.
In this case, since gas is being removed from the system, the reaction will shift to the side that produces more gas molecules. Looking at the balanced equation, we can see that 2HI(g) has a greater number of gas molecules compared to H₂(g) and I₂(g). Therefore, the system will shift to the right (products) to produce more HI(g) and reestablish equilibrium.
what is a collision and how does mass affects a collision
Answers
:)
Explanation:
A collision is the impact of 2 objects forcefully coming together in physical contact. So for example, a gold club and gold ball. The club comes in direct contact with the gold ball causing a collision. If the golf club had double the mass of the golf ball, it would result in the gold ball having twice the momentum even if they were moving at both the same speed and direction. Hope this helps explain a bit better!
Arrange the following aqueous solutions in order of increasing boiling points.
0.050 m Mg(NO 3) 2; 0.100 m ethanol; 0.090 m NaCl
a. Mg(NO3) < NaCl < ethanol
b. ethanol < Mg(NO3)2 < NaCl
c. ethanol < NaCl < Mg(NO3)2
d. NaCl < ethanol < Mg(NO3)2
e. Mg(NO3)2 < ethanol < NaCl
Answers
Answer:
The correct choice is option b. ethanol < Mg(NO3)2 < NaCl
Explanation:
Ethanol = 0.100 m
Mg(NO3)2 = 0.15 m
NaCl = 0.18 m
The molar concentration of NaCl is the highest, which is why its boiling point will be the highest, too.
When acetaldehyde at a pressure of 364 mmHg is introduced into an evacuated 500. mL flask at 518 °C, the half-life for the second-order decomposition process, CH3CHO → CH4 + CO, is 410. s. What will the total pressure in the flask be after 1.00 hour?
Answers
The total pressure in the flask after 1.00 hour will be 0.85 atm.
The given process is a second-order reaction, and its rate law is given by:
rate = k[CH₃CHO]²
where k is the rate constant and [CH₃CHO] is the concentration of acetaldehyde.
The half-life of the reaction is given as 410 seconds, which can be used to determine the rate constant as follows:
t1/2 = 1 ÷ k[CH₃CHO]²
410 s = 1 ÷ k[CH₃CHO]²
k = 1 ÷ (410 s [CH₃CHO]²)
Assuming that the reaction proceeds to completion, i.e., all the acetaldehyde is converted to methane and carbon monoxide, we can use the ideal gas law to determine the total pressure:
PV = nRT
where P is the total pressure, V is the volume of the flask (500 mL = 0.5 L), n is the number of moles of gas, R is the gas constant (0.08206 L atm/mol K), and T is the temperature (518 °C = 791 K).
Let [CH₃CHO]₀ be the initial concentration of acetaldehyde, then:
[CH₃CHO]₀ = P₀ ÷ RT
[CH₃CHO] = [CH₃CHO]₀ exp(-kt)
n(CH₃CHO) = [CH₃CHO]₀ V
n(CH4) = n(CO) = n(CH₃CHO)
Therefore, the total pressure at equilibrium is given by:
P = n(RT ÷ V) = [CH₃CHO]₀ (RT ÷ V) exp(-kt) + 2 [CH₃CHO]₀ (RT ÷ V)
P = P₀ exp(-kt) + 2P0
where P0 is the initial pressure of acetaldehyde (364 mmHg = 0.48 atm)
k = 1 ÷ (410 s [CH3CHO]³) = 0.000039 M⁻¹ s⁻¹
[CH₃CHO]₀ = P₀ ÷ RT = 0.48 atm ÷ (0.08206 L atm/mol K × 791 K) = 0.00706 M
P = P0 exp(-kt) + 2P0
P = 0.48 atm exp (-0.000039 M⁻¹ s⁻¹ × 3600 s) + 2 × 0.48 atm
P = 0.85 atm
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12. 5.6g of solid copper was heated with 476.2 J at room temperature (25°C). Given that
copper has a C of 0.38 J/g°C, what would its final temperature be?
Answers
Answer:
The final temperature of the copper would be 311.3°C.
I hope this helps you
???????????????????????
Answers
Answer:
c or b
Explanation:
brainiest
What type of wave travels quickly through solid, liquid, and gas?
A. primary
B. Secondary
C. Love
D. Rayleigh
Answers
Answer: sound waves
Explanation: Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solid
conclusion for polarity of liquid
Answers
Answer:
The polarity of a liquid refers to the separation of electric charge within the molecules of the liquid, resulting in a positive and negative end. Based on this, we can draw the following conclusion:
In conclusion, the polarity of a liquid is an important property that affects its behavior and interactions with other substances. Polar liquids have molecules with an uneven distribution of charge, resulting in positive and negative ends. This polarity influences various aspects, such as solubility, surface tension, and the ability to dissolve other polar substances. Additionally, polar liquids tend to exhibit stronger intermolecular forces, leading to higher boiling and melting points compared to nonpolar liquids. Understanding the polarity of a liquid is crucial for various fields, including chemistry, biology, and material science, as it helps explain and predict the behavior and properties of different substances in a wide range of applications.
PLEASE MARK AS BRAINLIESTAnswer:
The polarity of a liquid refers to the separation of electric charges within the molecule, resulting in a molecule with a positive end and a negative end. The presence or absence of polarity in a liquid has significant implications for its behavior and interactions with other substances.
In conclusion, the polarity of a liquid plays a crucial role in determining its physical and chemical properties. Polar liquids, such as water, have an unequal distribution of charge within their molecules, leading to hydrogen bonding and strong intermolecular forces. These interactions give rise to properties like high boiling points, surface tension, and solubility, making polar liquids excellent solvents and essential for many biological processes.
On the other hand, nonpolar liquids, such as hydrocarbons, have a symmetrical distribution of charge and lack strong intermolecular forces like hydrogen bonding. As a result, they have lower boiling points, weaker interactions, and are typically less soluble in polar solvents. Nonpolar liquids are commonly used as solvents for nonpolar compounds and have different applications in various industries.
Understanding the polarity of a liquid is crucial in fields such as chemistry, biology, and materials science. It helps predict how substances will interact and dissolve in a given solvent, as well as how they will behave in chemical reactions. Additionally, polarity affects the physical properties of liquids, including their viscosity, conductivity, and surface behavior.
In summary, the polarity of a liquid is a fundamental characteristic that influences its behavior, solubility, and reactivity. Whether a liquid is polar or nonpolar has far-reaching consequences in various scientific disciplines and practical applications
11.0 mL of an unknown concentration of NaOH is titrated with 37.0 mL of 0.65 M HCI. What is the concentration of NaOH in molarity?
Answers
The concentration of NaOH in molarity is calculated to be equal to 2.186 M.
What is meant by concentration?Concentration of chemical substance expresses the amount of substance present in any mixture.
In a neutralization reaction between NaOH and HCl, the number of moles of HCl will be equal to the number of moles of NaOH.
n(NaOH) = n(HCl)
n is the number of moles.
n(HCl) = M(HCl) x V(HCl)
M is the molarity and V is the volume in liters.
n(HCl) = 0.65 M x 0.037 L = 0.02405 moles HCl
Since the number of moles of NaOH is the same as the number of moles of HCl, we can use the following formula to find the concentration of NaOH:
M(NaOH) = n(NaOH) / V(NaOH)
V(NaOH) = 11.0 mL / 1000 mL/L = 0.011 L
M(NaOH) = n(NaOH) / V(NaOH) = n(HCl) / V(NaOH)
M(NaOH) = 0.02405 moles / 0.011 L = 2.186 M
Therefore, the concentration of NaOH in molarity is 2.186 M.
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Meat-eating animals are:
decomposers
second-order consumers
producers
first-order consumers
HELP
Answers
Answer:
decomposers
Explanation:
write the detailed structure of
A. C2H6 B. C4H10 C. C6H14 D. C7H16
Answers
A.
H₃C-CH₃
this is called ethane
B.
H₃C-CH₂-CH₂-CH₃
this is called butane
C.H₃C-CH₂-CH₂-CH₂-CH₂-CH₃
this is called hexane
D.
H₃C-CH₂-CH₂-CH₂-CH₂-CH₂-CH₃
this is called heptane
Answer:
1. a) Ethane (C2H6)
2. b) Butane (C4H10 )
3. c) Hexane (C6H14)
4. d) Heptane (C7H16)
