The concentration of sodium ion in the final solution containing 100 ml of 0.100 m Na₂SO₄ and 200 ml of 0.150 m NaBr is 0.167 M.
The concentration of Na₂SO₄ is given as 0.100 M. So it is clear that 0.100 mol of Na₂SO₄ is present in 1 L of solution.
One mole of Na₂SO₄ contains 2 moles of Na⁺ ions and one mole of SO₄²⁻ ion.
Therefore, the concentration of Na⁺ ion can be calculated as follows:
Concentration of Na⁺ ions (M₁) = 2×0.100 M
= 0.2 M
Volume of Na₂SO₄ (V₁) = 100 mL
Similarly, 0.150 M NaBr is taken, which implies that 0.150 moles of NaBr are present in 1 L of solution.
One mole of NaBr contains 1 mole of Na⁺ ions and one mole of Cl⁻ ion.
Therefore, the concentration of Na⁺ ion (M₂) = 0.150 M
Volume of NaCl (V₂) = 200 mL
It is known that, M₁V₁ + M₂V₂ = MV
Where V is the total volume of solution, that is 100 mL+200 mL = 300 mL and M is the concentration of Na⁺ ion in the final solution. Equating values of M₁, V₁, M₂, and V₂ in the above equation is as follows:
0.2 M×100 mL +0.150 M×200 mL = M×300 mL
⇒M=0.2 M × 100 mL + 0.150 M × 200 mL/ 300 mL
⇒M= 0.1666 M
⇒M=0.167 M
Hence, the concentration of Na⁺ ion in the final solution is 0.167 M.
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Which organism is able to form organized patterns of behavior through the process of integration because it has ganglia?
shark
mouse
grasshopper
flatworm
Organism is able to form organized patterns of behavior through the process of integration because it has ganglia is grasshopper.
What is organism ?Any organic, living system that performs as a standalone unit is referred to as an organism. All living things are made up of cells.
Groups of multicellular animals, plants, and fungi, as well as unicellular microorganisms like protists, bacteria, and archaea, are some examples of how creatures are categorized by taxonomy.
Atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism are the major levels of organization in the body, going from the simplest to the most complex.
Thus, option C is correct.
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What are water contaminants
Which one of the following is a weak acid?
a. H2SO4
b. HI
c. HBr
d. HF
e. HClO4
Answer:
HF
Explanation:
Draw the structure of the major organic product formed in the reaction of 1−methylcyclohexene with bromine in water.
The product form in the reaction of 1−methylcyclohexene with Bromine in water is trans-2-Bromo-1-methylcyclohexanol.
The molecular formula is C7H13BrO.
The Molecular Weight is 193.08200.
Synonyms of the product formed are as follow:
-2c-bromo-1r-methyl-cyclohexanol-(1)
trans-2-bromo-1-methylcylohexanol
1-Methyl-2trans-brom-cyclohexanol
trans-2-bromo-1-methylcyclohexanol
-2c-Brom-1r-methyl-cyclohexanol-(1)
For the structure check the image.
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if a sample of rock contains 0.009 percent gold by mass, how much nacn is needed to extract the gold
A particular ore employed in this study needed a concentration of 100 g/L (200 lb/st solution or 600 lb/st ore) NaCN to extract gold at a rate of over 90 percent.
In how much cyanide does gold mining take place?Since the 1970s, cyanide leaching, often known as "cyanidation," has been the main method used to extract gold. In this method, sodium cyanide is used to selectively dissolve gold from ore in a solution that contains between 100 and 500 parts per million, or 0.01% and 0.05% cyanide.
Where is cyanide most prevalent?Certain bacteria, fungus, and algae can generate cyanides. Additionally, cyanides can be found in things like tapioca, spinach, bamboo shoots, almonds, lima beans, fruit pits, and car exhaust.
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What is the bond order for O2-?
Answer: the order is 2
Explanation:the two in 02- is the answer from now on you well know the answer for questions like this on
How many electron pairs are present in a bond between two atoms is known as the bond order. A covalent bond between two atoms has a bond order of one for all single bonds, double bonds, triple bonds, quadruple bonds, and so forth.
O2 has a bond order of 2 and two unpaired electrons in its π* orbitals.
Over O2⁻, O2⁺ is more stable. Reason: O2+ has 15 electrons total, with one of those electrons in an antibonding orbital, according to the molecular orbital theory. There are 17 electrons in the case of O2 and 3 electrons are in antibonding orbitals. An unstable molecule results from having an excessive amount of electrons in antibonding orbitals.
Bond Order = (10 - 6) / 2
= 2
The O2 molecule is paramagnetic because it contains two unpaired electrons.
It possesses two unpaired electrons, and an octet can be completed with just two electrons. It doesn't have an unpaired electron because the other oxygen atom can share its two electrons with it. The molecule is described as being diamagnetic if there are no unpaired electrons. In a magnetic field, diamagnetic materials are repelled.
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Type the correct answer in the box. Express the answer to two significant figures. Given: N2 + 3H2 → 2NH3 Use the bond energies to calculate the change in enthalpy for the reaction. The enthalpy change for the reaction is [ ]kilojoules.
By using the bond energies given (picture attached) the change in enthalpy for the reaction will be -78 KJ
Bond energy of N≡N = 942 KJ/mol
Bond energy of H-H = 432 KJ/mol
Bond energy of N-H = 386 KJ/mol
Enthalpy change of the reaction = ?
Enthalpy change is the amount of heat evolved or absorbed during a chemical process.
The balanced chemical equation for the given reaction
N₂ + 3H₂ → 2NH₃
So,
number of moles of N≡N bonds = 1
number of moles of H-H bonds = 3
number of moles of N-H bonds = 2(3) = 6
In the first step bond breakage occurs between N≡N and H-H, as bond breakage absorbed heat so we use the plus sign here. In the second step bond formation releases energy so we use the minus sign here.
Calculate the enthalpy of the reaction
Enthalpy of reaction = (1 × BE of N≡N) + (3 × BE of H-H) - (6 × BE of N-H)
BE = bond energy
Put the bond energy values
Enthalphy of reaction = (1 × 942) KJ + (3 × 432) KJ - (6 × 386 ) KJ
Enthalphy of reaction = -78 KJ
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When 0. 4g of zinc trioxocarbonate (IV) reacted with dilute hydrochloric acid, zin chloride wa produced and carbon (IV) oxide evolved if the reaction took 2minute. What wa the rate of the reaction
The rate of reaction when 0. 4g of zinc trioxocarbonate (IV) reacted with dilute hydrochloric acid, zin chloride was produced and carbon (IV) oxide evolved if the reaction took 2minute is 0.0016 mol/min
The rate of reaction is the time taken for product molecules to appear or the time taken for reactant molecule to be converted and the rate of reaction = mole of product formed/time taken
And the equation of the reaction is
ZnCO₃ + 2HCl → ZnCl₂ + H₂O + CO₂
And the molar mass of zinc carbonate = 125.39 = 8g/mol
Mole of zinc carbonate converted = 0.4/125.38
Time taken = 2 min
Rate of reaction = 0.0032/2
Rate of reaction = 0.0016 mol/min
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calculate the amount of heat needed to boil of octane (), beginning from a temperature of . be sure your answer has a unit symbol and the correct number of significant digits.'
The amount of heat needed is 85.0 kJ.
Melting point determination is the most commonly used thermal analysis to characterize solid crystalline materials. It is used in R&D and quality control in various industries to identify solid crystalline substances and to ensure their purity. The heat capacity ratio is calculated by dividing the heat capacity at constant pressure by the heat capacity at constant volume.
Calculation
mass = 111g
temperature = 25.1⁰C.
Heat = msT
= 85.0 kJ.
Specific heat is the amount of heat required to raise 1 gram of a substance by 1 degree Celsius or Kelvin. The enthalpy change is given and the symbol indicates the enthalpy change. The heat of formation and heat of reaction are two forms of enthalpy. The boiling points of liquids can be determined using the capillary method. In this method a reverse capillary tube is placed in the liquid of interest and the liquid is heated.
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Disclaimer:- your question is incomplete, please see below for the complete question.
Calculate the amount of heat needed to boil 111 g of octane (C8H18), beginning from a temperature of 25.1⁰C. be sure your answer has a unit symbol and the correct number of significant digits.
What is something that would change
the potential energy in this situation?
Answer:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Write two half‑reactions to describe each of these metal displacement reactions. Include phase symbols. Mg(s)+cobr2(aq)⟶mgbr2(aq)+co(s).
The two half reaction for the displacement reactions are the oxidation and reduction reactions.
A displacement reaction is the one where the atoms or the set of atoms is been displaced by another atom in a molecule of the compound. For example, when iron is added to a copper sulphate solution, it displaces the copper metal. A + B-C → A-C + B.
An oxidation-reduction (redox) reaction is a type of chemical reaction that generally involves a transfer of electrons between any two species. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.
Mg → [tex]Mg^{2+}[/tex]+ 2e- Oxidation half reaction
[tex]Co^{2+}[/tex]+2e- → Co - Reduction half reaction
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the reaction in this experiment is the reverse of the hydration of cyclohexene to form cyclohexanol. both reactions are acid catalyzed. how does the use of the hickman still favor the desired product? (review carey 6.9.)
The reaction in this experiment is the reverse of the hydration of cyclohexene to form cyclohexanol is OH H⁺ + H₂O
The forward and backsword reactions are plausible in acidic conditions. To avoid this a special debilitation apparatus is used ic. Chicken al distillation apparatus. The precious, expeckenbeserve besi bugs point 86 degrees C is much lower than the cyclohexanol 165 degrees C. So if the distillation happens, the product evaporates no son as it comes in the reaction and is collected in a separate vessel.
So it would be in contact with acid or reaction mixture for much time. The distillate will contain only the product whereas bestizoru lacy in the reduction veal in eye labels real would Oneida. The feedstock is contaminated with water, unreacted alcohol, phosphoric acid, and some byproducts. Washing with water removes most contaminants. Treatment with sodium carbonate solution removes traces of acid and a final water wash removes the remaining carbonates. Synthesis of alkenes dehydration of cyclohexanol.
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if a food dye has an absorbance value of 1.00 at 598 nm when a 1.074x10-5 m sample was measured in a 1 cm cuvette, what can the dye's molar absorptivity, in m-1cm-1, be estimated as?
Each solution contains a different dye concentration in moles. Utilize your measured absorbance values and the Beer-Lambert Law equation (A = bc).
A 1 molar solution is what?In order to create a 1 molar (M) solution, 1.0 GMW of the chemical must be dissolved in 1 liter of water. 58.44 g make up a 1M solution of NaCl. Example: Enzyme histochemistry routinely employs HCl.
What does molar unit mean?The most common unit for molarity in chemistry is the number of moles per liter, given by the unit sign mol/L or moldm3 in SI units. One molar, or 1 M, of a solution's content is defined as one mol/L.
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4. A chemist is analyzing a sample of an unknown gas. A 0.240-gram sample of a gas has a volume of 336 mL when measured under a pressure of 1520 mm Hg at 273 °C. Find the molecular weight (molar mass
1 g is molecular weight or atomic mass of hydrogen. when a 0.240-gram sample of a gas has a volume of 336 mL when measured under a pressure of 1520 mm Hg at 273 °C
volume=336 mL
pressure= 1520 mm
temperature=546 K
given mass, m=0.240-gram
M=(molar mass
R= 8.2
PV=mRT/M
M=mRT/PV
M=1074/51072
M=1 g
The quantity of substance that makes up an element's atom is known as its atomic mass. One-twelfth of the mass of the carbon-12 atom, with an assigned atomic mass of 12 units, is expressed as a multiple of 1.992646547 1023 gram, or in other words, 1.992646547 gram. One atomic mass unit is equivalent to 1.660539040 1024 grams on this scale (amu). The atomic mass unit is sometimes referred to as the dalton in honor of English scientist John Dalton (Da).
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name each of the four quantum numbers and tell what property of orbitals or electrons each describes
The each of the four quantum numbers and property of orbitals or electrons each describes are :
principle quantum number - energy levelangular quantum number - sub shell shapemagnetic quantum number - orientation spin quantum number - electron spin1) Principle quantum number : the principle denoted by, n. the principle quantum number describes the energy level of electrons. like 3d subshell , n= 3
2) angular quantum number : angular quantum number describes the shape of the sub shell. example , l = 0,1,2,3..... s,p,d,f
3) magnetic quantum number , ml : describes the orientation of the orbitals. for l = 1 . ml = -1 0 +1
4) spin quantum number ms: describes the spin of the electrons. there are two possible value of spin quantum number . ms = + 1/2 for up and ms = - 1/2 for down spin.
Thus, The each of the four quantum numbers and property of orbitals or electrons each describes are :
principal quantum number - energy levelangular quantum number - sub shell shapemagnetic quantum number - orientation spin quantum number - electron spinTo learn more about quantum number here
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why are solid ionic compounds not used in batteries but liquid ionic are
Answer:
Solid ionic compounds do not have electrical conductivity because the ions are not free to move. In a liquid, the ionic compound dissociates into its respective ions.
An aquifer receives 20 m³ of precipitation and loses 2 m³ of water through natural movement. If the water budget mus
be balanced, how much water can be pumped from the aquifer?
O 22 m³
O 36 m³
O 18 m³
20 m³
Mark this and return
Save and Exit
Next
Submit
From the aquifer, 18 m3 of water may be pumped.
What distinctions exist between the water budgets of the local area and the entire planet?Because the total amount of precipitation, evapotranspiration, and runoff are equal, the water budget of the entire planet is balanced. Local water budgets, also known as water use budgets, are typically unbalanced for a certain area.
How does surface water become groundwater and travel below it?The naturally occurring water cycle includes groundwater (check out our interactive water cycle diagram). The precipitation that falls on the ground penetrates the subsoil to some extent. The portion of groundwater recharge that travels deeper into the soil until it reaches saturated rock material is the last to do so.
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In a solution, the substance present in the largest quantity is called the __________, while any other dissolved components are called _________.
Answer:
A homogenous mixture of two or more substances is called solution. The substance with the greatest relative amount is called the solvent, while the other substance (s) is called the solute.
Explanation:
Chemistry Assignment.
Naming and Writing Formulas.
Thanks in advance!
Naming and Writing Formulas
NaBr - ionic - sodium bromide
CF₄ - covalent - carbon tetrafluoride
N₂O₃ - covalent - dinitrogen trioxide
MgI₂ - ionic - magnesium iodide
KH₂PO₄ - ionic - potassium phosphate
SnO₂ - covalent - tin(iv) oxide
Fe(OH)₂ - covalent - iron(ii) hydroxide
P₄O₁₀ - covalent - phosphorous pentoxide
AuSO₄ - covalent - gold(ii) sulphate
N₂O - covalent - dinitrogen monoxide
Rb₂S - ionic - rubidium sulfide
SeF₆ - covalent - selenium hexafluoride
NaNO₃ - ionic - sodium nitrate
Al₂O₃ - ionic - aluminum oxide
SO₂ - covalent - sulfur dioxide
H₂O - covalent - dihydrogen monoxide
Mn(NO₂)₂ - ionic - magnese II nitrate
HgO - ionic - mercury II oxide
Li₃N - ionic - lithium nitride
Al₂(SO₄)₃ - ionic - aluminium sulfate
The primary function of chemical nomenclature is to ensure that a spoken or written chemical name leaves no ambiguity concerning which chemical compound the name refer to each chemical name should refer to a single substances
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in the fe-fe3c system, there are a number of important temperatures and compositions to remember. what is the temperature and composition that defines the pearlite transformation?
During pearlite transformation the temperature drops down to 600 degree C and it occurs in the Eutectic point.
What is phase diagram?
Graphical representations of the phases that exist in an alloy under various temperature, pressure, or chemical composition conditions are called phase diagrams.
The graphic illustrates the necessary elements for the equilibrium of two or more phases. A site where water can coexist in three different phases at once is described as a "triple point" in the water phase diagram, for instance. This occurs at a temperature of 0.01 °C and an atmospheric pressure of 0.006.
The pearlite transformation happens when the temperature changes from 675 degree C to 600 degree C. The point where which the transformation occurs is called as Eutectic point.
Eutectic point - A junction of several phases is known as a eutectic point. In the iron-carbon alloy diagram, the intersection of lines A1, A3, and ACM is known as the eutectic point. These points happened to develop at the same time.
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after titration, 25 ml of a vinegar solution was found to contain 0.03 moles of acetic acid. using a density of 1.00 g/ml, what is the mass percentage of acetic acid in this vinegar sample? report your answer to three decimal places.
The mass percentage of acetic acid in this vinegar sample is 1.00 %
Density is the size of ways tightly a fabric is packed collectively. it is described as the mass consistent with unit quantity. Density image: D or ρ Density system: ρ = m/V, wherein ρ is the density, m is the mass of the object and V is the quantity of the item.
Density is the substance's mass per unit of volume. The image most usually used for density is ρ, despite the fact that the Latin letter D also can be used. Mathematically, density is defined as mass divided by using volume Density is the mass of an object divided by using its extent. Density frequently has gadgets of grams according to cubic centimeters (g/cm3).
Calculation:-
Acetic Acid = 0.03 mol
moles of Gram of Acetic acid=moles x molar mass.
= 0.03 mol x 60 mol
Now, as De 1.8g Density = 1.00
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Calculate the standard free-energy change for the reaction at 25 ∘c. Refer to the list of standard reduction potentials. 2au3+(aq)+3zn(s)↽−−⇀2au(s)+3zn2+(aq).
The standard free-energy change for the reaction is 218090 kJ/mol
Standard reduction potential is the measure of the tendency for a given chemical species that need to be reduced. Where the standard oxidation potential measures the tendency for a given chemical species to be oxidized that is opposed to be reduced.
electrochemical reaction is any process that is either caused or accompanied by the passage of an electric current and which involves in most cases the transfer of electrons between two substances—one a solid and the other a liquid.
To find the standard free-energy change we use the formula;
[tex]E^{o}[/tex] = [tex]E_{cathode}[/tex] - [tex]E_{anode}[/tex] where cathode = Zinc and Anode = Au
[tex]E^{o}[/tex] = -0.76 -1.50
= 2.26
Therefore the standard free-energy change will be;
Δ[tex]G^{o}_{cell[/tex] = -6 × 96500 ×2.26
= 218090 kJ/mol
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gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . suppose 15.3 g of ethane is mixed with 18. g of oxygen. calculate the minimum mass of ethane that could be left over by the chemical reaction. be sure your answer has the correct number of significant digits.
The minimum mass of ethane that could be left over by the chemical reaction is 5.33 grams.
What is ethane?Ethane is a two-carbon alkane that which is a colorless and odorless gas. Ethane is isolated on the industrial scale from natural gas at standard temperature and pressure and as a by-product of petroleum refining.
Given mass of ethane = 15.33 grams
Mass of oxygen = 18.0 grams
We know, molar mass ethane = 30.07 g/mol
and Molar mass oxygen = 32.0 g/mol
2C2H6 + 7O2 → 4CO2 + 6H2O
Moles of ethane = 15.33 grams / 30.07 g/mol
Moles of ethane = 0.509 moles
Moles of oxygen = 18.0 grams / 32.0 g/mol
Moles of oxygen = 0.562 moles
For 2 moles ethane ,we would need 7 moles oxygen to produce 4 moles CO2 and 6 moles H2O
Oxygen is limiting reactant and it will be consumed completely.
0.562 / 3.5 = 0.160 moles
Remaining will be- 0.509 - 0.160 = 0.349 moles
Mass of ethane = 0.349 moles * 15.3 g/mol
Remaining Mass of ethane = 5.33 grams
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elements combine in three general ways. in blank compounds, electrons are transferred from one element to the other, whereas in blank compounds, electrons are shared between atoms. third, in blank bonding, electrons are shared between a large number of atoms in an electron sea.
Elements combine in three general ways. In ionic compounds, electrons are transferred from one element to the other, whereas in covalent compounds, electrons are shared between atoms. Third, in metallic bonding, electrons are shared between a large number of atoms in an electron sea.
Ionic compounds are compounds in which a free electron is transferred to another atom and a bond is formed. Ionic bonds occur in metal ions.
In liquid compounds, covalent bonds are formed. In covalent bonds, electrons are shared with each other,
The third type of bond is the metallic bond. In this type of bond, atoms are packed tightly and a free electron pool travels in between them.
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An atom has 29 protons, 30 neutrons, and 27 electrons. What is the mass number?
The atomic number of copper is 29, and it has the mass number 63. The number of protons in the nucleus determines the atomic number, and the number of protons and neutrons determines the mass number.
What is the mass number?The total number of protons and neutrons in an atomic nucleus is known as the mass number, sometimes known as the atomic mass number or nucleon number. It is roughly equivalent to the atom's atomic mass expressed in an atomic mass unit.
It is calculated by adding the total amount of protons and neutrons. For instance, the atomic number of magnesium is 4, while the atomic number of lithium is 4, which is equal to the number of protons. Eight ( 4 + 4 ) is the mass number.
Because it indicates the mass of all the protons and neutrons in an element, the mass number of an element is designated as such. The atomic number and atomic mass of an element are often listed in periodic tables along with the chemical symbols for each element.
Thus, An atom has 29 protons, 30 neutrons, and 27 electrons has the mass number 63.
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Write down four different covalent compounds that could form, and indicate why they are
covalent based on the electronegativity differences.
Draw and label the structure of an atom of carbon.
i have attached an image of carbon atom that you can copy
Calculate the amount of heat neceary to raie the temperature of 47. 8 g ethylene glycol
Th amount of heat necessary to raise the temperature of 47.8g ethylene glycol is 47.8J.
To calculate the amount of heat transferred (q) is the product of specific heat capacity(C), mass of substance(m) and the change in temperature(ΔT).
q=m×c×ΔT
Here m=47.8g , C=1K, ΔT= 1K
q= 47.8J
What is ethylene glycol?
Ethylene glycol is a water-absorbing synthetic liquid. It has no odour and a sweet taste. Ethylene glycol is used in the manufacture of antifreeze and deicing solutions for automobiles, aeroplanes, and boats. It's also found in hydraulic brake fluids and inks used in stamp pads, ballpoint pens, and printing presses.
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which of the following statements correctly interpret the balanced chemical equation : 4HCl(aq) + MnO2(s) --> MnCl2(aq) + 2H2O(g) + Cl2(g)? select all that apply
a. liquid H2O is produced in this reaction
b. HCl is a reactant in this equation
c. the MnCl2 produced is dissolved in water
d. 4.00 g of HCl reacts with 1.00 g of MnO2
e. the MnO2 used in this reaction is a solution
HCL is the reactant in this equation and the mncl2 produced dissolves in water.
The given reaction is a redox reaction. Here, Mno2 is the oxidizing agent.
Mn2 + 2e --------> MnCl2
Here, Mn goes from oxidation state +4 to oxidation state +2. Thus, Mn clearly gains electrons. Therefore, Mno2 is reduced to Mncl2 here.
Also,
2Hcl -----------> Cl2 + 2e
Here Cl from Hcl is in oxidation state -1 and after losing one electron it goes to oxidation state 0. Hence Hcl is oxidized to Cl2.
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A scuba diver's tank contains 1.47 moles of 02 and 5.53 moles of He at the end
of a dive. If the pressure of the gas mixture is 12.1 atm, what is the partial
pressure of He in the tank?
2.19 atm
2.54 atm
9.56 atm
15.3 atm
The partial pressure of He in the tank, given that the tank contains 1.47 mole of O₂ and 5.53 moles of He is 9.56 atm
How do I determine the partial pressure of He?To obatin the partial pressure of He in the tank, we'll begin by obtaining the mole fraction of He in the tank. This is illustrated below:
Mole of O₂ = 1.47 mole Mole of He = 5.53 moles Total mole = 1.47 + 5.53 = 7 molesMole fraction of He =?Mole fraction of He = Mole of He / total mole
Mole fraction of He = 5.53 / 7
Mole fraction of He = 0.79
Finally, we shall determne the partial pressure of He in the tank. Details below
Mole fraction of He = 0.79Total pressure of gas mixture = 12.1 atmPartial pressure of He =?Partial pressure of He = mole fraction of He × total pressure
Partial pressure of He = 0.79 × 12.1
Partial pressure of He = 9.56 atm
Thus, we can conclude that the partial pressure of He is 9.56 atm
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