If x represent the molar solubility of Ba₃(PO₄)₂ Bax₃(POx₄)x₂ the correct equation for Ksp is (3x)³(2x)².
The equation is given as :
Ba₃(PO₄)₂ ⇄ 3Ba²⁺ + 2PO₄³⁻
if x represent molar solubility then , we get :
Ba₃(PO₄)₂ ⇄ 3Ba²⁺ + 2PO₄³⁻
3x 2x
therefore , the solubility product constant is given as :
Ksp = (3x)³(2x)²
The solubility product constant is the equilibrium constant which used for the dissolving of solid substances into the aqueous solution. The solubility product constant is denoted as Ksp. The value of solubility constant depends on temperature.
Thus, If x represent the molar solubility of Ba₃(PO₄)₂ Bax₃(POx₄)x₂ the correct equation for Ksp is (3x)³(2x)².
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* i need to make a 2.00 m solution of sodium hydroxide. i have a 11.9 m solution of naoh on the shelf. how many ml of the 11.9 m solution of naoh do i need to make 2 liters of the 2.00 m naoh solution?
336 ml of the 11.9 m solution of NaOH do i need to make 2 liters of the 2.00 m NaOH solution
What is Chemical reaction ?
Chemical reactions happen absolutely everywhere. While we sometimes associate chemical reactions with the sterile environment of test tubes and laboratories, nothing is farther from the truth. In fact, a vast number of transformations are creating a dizzying and almost incomprehensible series of new matter and energy changes in our world every second of every day. In nature, chemical reactions can be much more difficult to control and in some cases much more complex than in the laboratory, and generally occur whether you want it or not!In the woods A raging fire, the slow rusting process of iron over the years in the presence of oxygen and water, or the delicate ripening of fruit on a tree, the transformation of various chemicals, etc... (reactants ) into another group of substances (products) is a so-called chemical reaction.
use M1V1=M2V2
V1 = M2V2/M1 = 336 ml .
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1)Give an example of a useful product that involves an endothermic reaction or process
2)Give an example of a useful product that involves an exothermic reaction or process
Answer:
1) endothermic reaction - melting of ice to water
2) exothermic reactions - burning of candles
Explanation:
Endothermic reaction:
endothermic reactions are chemical reactions that absorb heat from the environment.
In this case, when ice is melting to turn into water it absorbs heat from its surroundings and melts.
Exothermic reaction:
exothermic reactions are chemical reactions that release heat as a form of energy when a reaction takes place.
In the case of burning a candle, the heat is released into the environment.
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what volume (in ml) of a 2.0 m solution of naoh is needed to prepare 494.4 ml of a 0.15 m solution of naoh
The volume of a 2.0 m solution of NaOH needed to prepare 494.4 ml of a 0.15 m solution of NaOH is 37.08 ml.
Dilution is defined as the process in which the concentration of a sample is decreased by adding more solvent. The dilution formula is given below.
C₁V₁ = C₂V₂
where C₁ = initial concentration of sample = 2.0 m
V₁ = initial volume of sample
C₂ = final concentration after dilution = 0.15 m
V₂ = total final volume after dilution = 494.4 ml
Plug in the values to the formula and solve for the volume of the solution needed.
V₁ = C₂V₂/C₁
V₁ = (0.15 m)(494.4 ml)/(2.0 m)
V₁ = 37.08 ml
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why is it critical to insert the gas syringe immediately after adding the yeast solution to the sugar in the erlenmeyer flask each time this experiment is repeated with a different sugar?
It is critical to insert the gas syringe immediately after adding the yeast solution to the sugar in the Erlenmeyer flask so that the gas syringe must capture all the gas generated from each sugar in the first minute if the results for all the sugars are to be compared.
What is the Erlenmeyer flask?An Erlenmeyer flask which is also known as a conical flask or a titration flask, is a type of laboratory flask which features a flat bottom, a conical body, and a cylindrical neck.
The most common type of Erlenmeyer Flask is merely the flat- bottomed, used widely in laboratories.
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Can yall help me with this
The phrase "axial tilt" is essential to understanding why the season change , the words or phrases from the article provided context clues to the meaning of the phrase " axial tilt" is orbits and 23.5 degree offset.
The axial tilt also called as obliquity. The axial tilt is the angle between the objects rotational axis and its orbital axis , perpendicular to the orbital plane. The axial tilt is about 23.5 degree. due to this the sun shines on different latitudes with different angle.
Thus, The phrase "axial tilt" is essential to understanding why the season change , the words or phrases from the article provided context clues to the meaning of the phrase " axial tilt" is orbits and 23.5 degree offset.
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Answer:
A: 2 and 4
Explanation:
ttt
a redox titration similar to this one requires 30.65 ml of iodine solution to titrate a sample containing 25.00 ml of 0.0002487 m ascorbic acid to the end point. what is the molarity of the iodine?
The molarity of iodine solution is containing 25.00 ml of 0.0002487 m ascorbic acid is 0.0002028 M.
We calculate this using ,
Let molarity and volume of ascorbic acid be M₁ and V₁
M₁ = 0.0002487 m
V₁ = 25.00 ml
Molarity of iodine be M₂ .
As , ascorbic acid + I₂ → 2I⁻ + dehydroascorbic acid
By molarity equation,
M₁ V₁ = M₂ V₂
where M₂ is Molarity of iodine and V₂ is volume if iodine.
M₂ = 0.0002487 / 25 ÷ 30.65
M₂ = 0.0002028 M
Therefore, 0.0002028 M is the molarity of the iodine.
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What is the mass concentration of 2mole HCL solution?(h=1,Cl=35.5)
Answer:
So the answer to the question “What is the mass concentration of hydrogen chloride in 2.0-molar hydrochloric acid?” is 73 grams per liter.
when a substance exhibits resonance, we say that none of the individual lewis structures accurately portrays the bonding in the substance. why do we draw resonance structures?
The class of Lewis structures known as resonance structures depicts the movement of bonds and lone pairs through various configurations. Resonating structures are produced by the complete transfer of electrons during delocalization from one atom to the following atom. We can infer from this that the distribution of charges is distributed evenly across the molecule, rather than being concentrated at a single location. The electrons are not concentrated around the sigma bond, as shown by resonance structures. The entire molecule now has a high electron charge density. The preferred representation of the molecule is displayed by the resonance structures. The collection of structures suggests that the pi bond's electrons are distributed evenly throughout the molecule and are not concentrated at any one point. Following the octet rule, resonating structures indicate that the atom
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What is the density if the mass is 25 grams and the volume is 100 cm cubed?
A. 4 g/cm^3
B. 25 g/cm^3
C. .25 g/cm^3
D. .4 g/cm^3
Answer:
C. .25 g/cm^3
Explanation:
density = mass ÷ volume
25÷100
0.25
Hydrogen sulfide (H2S) is combined with zinc (Zn). The equation for the reaction is shown below.
H2S + Zn → H2 + ZnS
What happened during this reaction?
A zinc atom formed bonds with two hydrogen atoms.
A sulfur atom formed bonds with two hydrogen atoms.
A zinc atom formed a bond with one sulfur atom.
Bonds between a zinc atom and two hydrogen atoms were broken.
Bonds between a sulfur atom and two hydrogen atoms were broken.
The correct option are option C,E that is bonds between a sulfur atom and two hydrogen atoms were broken. Zinc atom formed a bond with one sulfur atom.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
In the give reaction, bonds between a sulfur atom and two hydrogen atoms were broken. zinc atom formed a bond with one sulfur atom.
Therefore, the correct option are option C,E.
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a main-group element has an outer electron configuration of ns2np3 . what charge is likely for an ion of this element?
The charge for an ion of an element that has an outer electron configuration of ns2np3 is -3.
To be in a stable state, electrons try to make a noble gas configuration. The noble gas configuration is ns2 or ns2np6. So electrons try to gain or lose electrons to become ions. Ions have a charge according to the number of electrons captured (negative charge) or released (positive charge). The charge for an ion with the electron configuration
ns1 is +1ns2 is +2ns2np1 is +3ns2np2 is +4ns2np3 is -3.ns2np4 is -2.ns2np5 is -1.Ions with a negative charge are anions while ions with a positive charge are cations.
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if 243 mg of mg(oh) 2 was neutralized with 0.0500 m hcl, what volume of hcl would you need for the neutralization?
volume of HCl would you need for the neutralization is 4 ml .
What is neutralization reaction ?
In chemistry, neutralization or neutralization (see spelling difference) is a chemical reaction in which acids and bases react quantitatively with each other. When reacting in water, neutralization does not generate excess hydrogen or hydroxide ions in solution. The pH of the neutralized solution depends on the acidity of the reactants.
In the context of chemical reactions, the term neutralization is used for reactions between acids and bases or alkalis. Historically, this reaction was expressed as
Example:
HCl + NaOH → NaCl + H2O
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write a brief procedure outlining how would you prepare 250ml of a 0.150m solution of cocl2 from solid cocl2 and distilled water
4.87g of would be prepared 250mL of 0.150M solutions of COCl2 form solid COCl2 and distilled water.
Solution and solvent:
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent. Note that the solvent is the substance that is present in the greatest amount. Many different kinds of solutions exist. For example, a solute can be a gas, a liquid, or a solid.
Let us consider that the solution is dissolved in the solvent.
Here the solution is cobalt(II) chloride and the solvent is distilled water.
The volume of solute is generally ignored, so we would dissolve
250ml . L / 10³ml. 0.150 M . 129.9g/ mol ≈ 4.87g
Therefore 4.87g of cobalt(II) chloride was in approximately 250mL distilled water to create the solution.
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Which describes the MOST LIKELY effect of the mismatch on future birds?
A. There could be a shift to earlier reproduction in
the birds.
B. The next generations of birds may choose to not
reproduce.
C. There could be a shift to later reproduction in the
birds.
D. The next generations of birds may choose to
reproduce more often.
The statement which best describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the birds and is therefore denoted as option C.
What is Reproduction?
This is referred to as the process in which an offspring is produced from their parent or cells and involves the fusion of gametes.
In the effect of mismatch on future birds, there will be a reduction in the birds getting a mate which therefore shift to later reproduction and is therefore the reason why option C was chosen as the correct choice.
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The statement that describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the
birds.
So option C is correct.
What is reproduction?Reproduction is described as the biological process by which new individual organisms offspring are produced from their "parent" or parents.
If there is mismatch on future birds, one of the many effects is that there could be a shift to later reproduction in the birds which the consequences of such mistiming in reproduction are reduced reproductive output.
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A student builds a battery-powered car from a kit. Which series of energy transformations takes place as the car moves forward?
A:Electrical energy-Chemical energy- mechanical energy
B: Chemical energy-mechanical energy-electrical energy
C:mechanical energy-electrical energy-chemical energy
D:chemical energy-electrical energy-mechanical energy
The option A is correct , Firstly electrical energy is converted into mechanical energy via chemical energy.
The force generated by an engine powered by electricity is what propels an electric vehicle forward. These automobiles feature an original and useful design in addition to being environmentally friendly.
What is the operation of electric cars is that the electrical energy is supplied to the engine, which uses electromagnetic interactions to convert it into mechanical energy.
Energy transformations is the process of a type of energy form transforming into a new form of energy
When they enter a magnetic field, the conductive material inside them moves, and the electric current then passes through it.
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alculate the number of moles of argon gas contained in a 4.00 l container at 1620. kpa and 25.0 oc. if the gas is helium instead of argon, will the answer change? explain 2.62 moles
The number of moles of argon gas contained in a 4.00 l container at 1620. kpa and 25.0 °C. if the gas is helium instead of argon, the number mole did not change because number of moles is independent of the type of gas.
given that :
volume of gas = 4.00 L
pressure of gas = 1620 kpa = 15.9 atm
temperature = 273 + 25 = 298 K
R is gas constant = 0.082 L atm K / mol
according to ideal gas equation :
P V = nRT
n = P V / RT
= (15.9 × 4 ) / 0.082 × 298
= 63.6 / 24.4
= 2.6 mol
it is clear from the above equation the moles is independent of type of gas.
Thus, The number of moles of argon gas contained in a 4.00 l container at 1620. kpa and 25.0 °C. if the gas is helium instead of argon, the number mole did not change because number of moles is independent of the type of gas.
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20 PTS!!
An experiment that tests only one factor at a time by using a comparison of a control group and an experimental group is... A) a dependent variable B) an independent variable C) a controlled experiment D) a theory
What are the advantages and disadvantages of using:
a volumetric pipette
a measuring cylinder
gas syringe
burette
a weight balance
Answer:
there are used to where large volumes are needed to be transferred and coloured graduated marks make it easier to measure the volumes. the disadvantage isthat they are not so precise and there are greater changes of human error
how can I got oxygen from water and collect it
Explanation:
through the process of electrolysis.
electricity (loose electrons under "pressure") is sent through water allowing the oxygen atoms to bind enough electrons to become independent O2 molecules and detach from water molecules, hence "freeing" themselves as oxygen gas. which in turn also creates free H2 molecules and therefore hydrogen gas.
the free oxygen collects at the positive electrode, the free hydrogen at the negative electrode.
an additional option is to collect the free oxygen that is simply mixed into the water and allows fish to "breathe" (the gills do NOT break oxygen out of the H2O molecules but use the mixed-in free O2 oxygen between the H2O molecules).
that is the reason why a fish tank needs the constant air stream bubbling through the water (or we would have to constantly stir the water in the tank rigorously), and why truly still water bodies "die" (any originally mixed-in oxygen leaves over time, literally suffocating any oxygen-needing lifeforms in those bodies of water).
to capture this, cool the water down to about 4° C (about 39° F), at which point water has its greatest density (below that water expands again preparing for the larger volume needed by the crystalline grid of water ice). that pushes/squeezes a lot of the mixed-in elements incl. free oxygen out of the water.
but that is very little compared to an electrolysis result.
Which play borders the philippine plate
The plates which borders the great philippine plate are the:
The Pacific platesThe Sunda platesThe Eurasia platesHow are the Pacific, Sunda and Eurasia plates borders the philippine plate.It follows that all the plates which have the sea Philippines plates bordered have one thing in common. They are all defined by means of convergent boundaries. In order words, the Pacific, Sunda and Eurasia plates border the philippine plate are produced by different plates which are converging towards each other in several directions.
In conclusion, we can now know that one of the major plates which borders the sea philippines plate is the Pacific plates.
Complete question:
Which plates borders the philippine plate?
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Draw the structure or structures produced by the catalytic reduction of the given compound, in which h2 is in excess. Draw hydrogen at a chirality center and use wedge‑and‑dash bonds to designate the stereochemistry, if applicable.
Structures produced by the catalytic reduction of the given compound, in which H₂ is in excess are attached as a picture.
Upon the catalytic reduction of the given compound 1-ethylcyclohexa-1,4-diene (missing in question) by using excess hydrogen, two compounds (1R,2S)-1-ethyl-2-methylcyclohexane and (1S,2R)-1-ethyl-2-methylcyclohexane results. One compound has R,S configuration and the other has S,R configuration. By using the CIP rules priorities are given to the groups attached to the chiral carbon. CIP rules are based on the atomic masses of the groups attached so the minimum number is given to the group having the highest atomic mass. As it is a mixture of two enantiomers so we can call it a recemic mixture.
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Which effect of the chemical industry is a positive one? (1 point)
O acid rain
O advancements in medicine
O building manufacturing
O pollution of water
In an ecosystem, the effect of the chemical industry which is a positive one is advancements in medicine.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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what option defines solute? responses the substance in a solution that neither has a positive charge nor a negative charge the substance in a solution that neither has a positive charge nor a negative charge the substance in a solution that has both positive charges and negative charges the substance in a solution that has both positive charges and negative charges the substance in a solution that dissolves another substance the substance in a solution that dissolves another substance, , the substance in a solution that has been dissolved
Solute is the substance in a solution that has been dissolved. So option 4 is correct.
What is a solute?A homogeneous mixture of two or more substances, a solute is a substance dissolved in another substance known as a solvent. The concentration of a solute in solution is a measure of how well that solute is dissolved in a solvent, in terms of how much of that solvent, such as a salt, is present. The properties of solutes are:
A solution is a homogeneous mixture of two or more substances.Solute particles in solution are not visible to the bare eye.Solution does not scatter light.Solution is stable. Solutes cannot be filtered (or mechanically) separated from solutions.It is composed of only one phase.To know more about solutes visit:
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which of the following element pairs would be most likely to form an ionic compound? a) hydrogen; carbon b) nitrogen; oxygen c) oxygen; carbon d) calcium; carbon e) sodium; potassium
Among the above given element pairs none of them are likely to form ionic compounds
Ionic bonds are basically the electrostatic attractions formed between oppositely charged ions in an ionic compound. Generally ionic bonds are often formed when electrons are transferred from metal atom to a non metal atom.
We can say that ionic bond is most likely formed between metal and nonmetal elements .
In the above given electron pairs none of the pairs given are likely to form ionic compounds as none of the pair is of a metal and a nonmetal. An element can be classified as a metal if its found on the left side of the periodic table while non metals are located on the right of the periodic table.
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an oxygen-containing compound shows strong, broad ir absorption at 3200 - 3500 cm-1. what is the functional group present?
An oxygen containing compound shows strong, broad ir absorption at 3200 - 3500 cm⁻¹ the functional group present is carboxylic acid
A carboxylic acid is the functional group combine the feature of alcohol and ketones because it has both the OH bond and C=O bond and therefore carboxylic acid show a very strong and broad band covering a wide range between 2800 to 3500 cm⁻¹ for the OH strech and the range 2850 to 3000cm⁻¹ belong to saturated system while peak 3000 to 3100 indicate an unsaturated system and ir absorption is caused by the interaction between the IR electric field vector and the molecular dipole transition moments related to the molecular vibration
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true or false energy is released from ATP when it reacts with water to pro duce ADP
true or false the information that cells need to direct their metabolic process is stored in RNA
btw it biology
Answer:
False for the first, true for second.
Explanation:
ATP is cellular energy and it needs to be recharged after it is used. That half dead is called adp.
The statement energy is released from ATP when it reacts with water to produce ADP is False, while the statement the information that cells need to direct their metabolic process is stored in RNA is True.
What is ATP?ATP is the energy source of cells generated by cellular respiration and anaerobic processes, while RNA is a molecule obtain by the transcription process which is used to generate proteins during metabolic activities such as differentiation.
Therefore, with this data, we can see that ATP is the energy coin of cells, while cells generate RNA during transcription.
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in the laboratory you dilute 4.90 ml of a concentrated 12.0 m hydrochloric acid solution to a total volume of 175 ml. what is the concentration of the dilute solution?
The diluted hydrochloric acid solution had a concentration of 0.3M
what is dilution?
Dilution is the application of a solvent that reduces the concentration of the solute with in solution. Concentration is the elimination of solvent, which raises the concentration of the solute in the solution.
The hydrochloric acid chemical formula is HCL,
if 1 liter of the HCL has 12mol, then 4.90ml or 0.0049 L of solution has 0.058 moles,
When the acid solution was diluted , we will get 175ml or 0.175 L
so as we dilute the solution we will have the change in the concentration and that is calculated
0.058/0.175=0.3314
=0.3M
So the concentration of the solution that is diluted was found to be 0.3M
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suppose that 60 ml of 0.1 m naoh is required to completely neutralize the amine group of glycine in an analyte solution. what quantity of glycine is present in the analyte?
The quantity of glycine present in analyte as measured by titration is 3mmol.
This titration calculation can be done using dimensional analysis. All values should first be converted to scientific notation: 60 mL NaOH is equal to 6 x 10-2 L NaOH. 1 x 10-1 mol NaOH/L NaOH is equal to 0.1 M NaOH. For every mole of glycine present in the analyte, 2 moles of NaOH have been supplied at the second equivalence point. This is due to the fact that one OH- was necessary to scavenge the COOH group, and a second OH- was required to scavenge the amine. To take this into consideration, we must adjust our computation. Finally: (6 x 10-2 L NaOH) x (10-1 mol NaOH / L NaOH) x (1 mol glycine / 2 mol NaOH) = 3 x 10-3 mol = 3.0 mmol glycine.
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g the electron geometry of a molecule depends on the number of regions of electron density around the central atom in a molecule. if a molecule presents 3 regions around the central atom, which would be the predicted electron geometry?
The predicted electron geometry is a trigonal planar geometry.
What is electron geometry?Molecular geometry is the three-dimensional arrangement of atoms that make up a molecule. This includes not only the general shape of the molecule, but also bond lengths, bond angles, torsion angles, and all other geometric parameters that determine the position of each atom.The arrangement of electron groups is determined by the number of electron groups. On the other hand, the molecular shape depends not only on the number of electron groups, but also on the number of lone pairs. If the electron groups are all bond pairs, they are named exactly like the electron group geometry. The two regions of electron density around the central atom of the molecule form a rectilinear geometry. The three regions form a trigonal planar geometry. Four regions form a tetrahedral geometry. The five regions form a trigonal bipyramidal geometry. Six regions form an octahedral geometry.To know more about electron geometry visit:
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you weighed out .50 g of zinc chloride salt instead of the .32 g required for the experiment. how will this effect the empirical formula obtained?
You weighed out 0.50 g of zinc chloride salt instead of the 0.32 g required for the experiment. it will not affect the empirical formula obtained.
The empirical formula is calculated by the number of moles of substances. if we increase the number of mass of zinc chloride it will increase the number of moles of zinc and the chlorine. that would divide the number of moles to obtain the ratio. so, by increasing the weight of zinc chloride there will be no effect in the empirical formula . they will remain in same proportion.
Thus, You weighed out .50 g of zinc chloride salt instead of the .32 g required for the experiment. it will not affect the empirical formula obtained.
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