Answers
At 80C, the solubility of potassium chloride in water is approximately 56.2 grams per 100 grams of water. Therefore, approximately 112.4 grams of potassium chloride can be dissolved in 200 grams of water at 80C.
At 80C, the solubility of potassium chloride in water is approximately 56.2 grams per 100 grams of water.
We can use this to calculate how much can be dissolved in 200 grams of water.
We first convert 56.2 g/100 g to a proportion:
56.2 g/100 g = x/200 g
We can then cross multiply and solve for x:
100x = 56.2(200)
x = 112.4 g
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Related Questions
Scientists believe the evidence to support the Big Bang Theory is that the Universe is________
Shrinking
Still expanding
Answers
Answer:
The Universe will continue to expand :)
Explanation:
Dark matter reverses the effect of gravity in some cases, and the Doppler effect also supports this claim, in which it states that the later the star has formed, the farther away it will be from the center/origin point of our universe.
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Trees cover what percentage of the Smoky Mountains National Park.
A. 95 percent
B. 87 Percent
C.65 percent
D.34 percent
Answers
Answer:
C. 65 percent
As the distance between the moon and Earth increases the moon's orbital speed...
1. decreases
2. increases
3. stays the same
Answers
The increase in distance between moon and earth, the orbital speed of moon increases. As the gravitational force from earth at closer distances, the speed of orbiting decreases for moon.
What is orbital speed?Moon revolves around the earth through a fixed circular path called orbit. Moon also rotates on its own axis like earth do. The distance between moon an earth varies with revolution time.
Earth attracts every objects on or near its surface into its center of mass by gravitational force. The force exerted depends on the mass of object and distance from the ground.
As the distance from earth increases, the gravitational force experienced by moon from earth reduces and thereby, it is getting some freeness to orbits. Thus, orbital speed increase.
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For the reaction 2 A - Products, the concentration of A is monitored over time. A graph of [A] versus time was found to be linear, with a negative slope. Select the true statement regarding this reaction.
A) The reaction is first order with respect to A.
B) The reaction is second order with respect to A.
C) The rate constant has a negative value.
D) In 2 The reaction has a half-life equal to k.
E) None of these statements is true.
Answers
Answer:
none of these statements is true
according to the question E) None of these statements is true.
What is a concentration in chemistry?The concentration of a chemical substance expresses the amount of a substance present in a mixture. There are many different ways to express concentration. Chemists use the term solute to describe the substance of interest and the term solvent to describe the material in which the solute is dissolved
What is concentration in chemistry units?
Quantitative units of concentration include molarity, molality, mass percentage, parts per thousand, parts per million, and parts per billion.
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Complete the following reactions by which to make such transformations
Answers
The complete reaction equations are as follows:
a. ZnO + Al2O3 → ZnAl2O4
b. Ca(HCO3)2 + 2KOH → CaCO3 + 2K(HCO3)
c. 2FePO4 + 3Na2HPO4 → Fe2(HPO4)3 + 6NaPO4
What are the reactions to the given transformations?The reactions for the given transformations are as follows:
a. ZnO + H2SO4 → ZnSO4 + H2O
ZnSO4 + 2NaOH → Zn(OH)2 + Na2SO4
Zn(OH)2 → ZnO + H2O
b. Ca(HCO3)2 + Ca(OH)2 → 2CaCO3 + 2H2O
CaCO3 + 2HCl → CaCl2 + CO2 + H2O
CaCl2 + 2KOH → Ca(OH)2 + 2KCl
c. FePO4 + Na2CO3 → FeCO3 + Na3PO4
FeCO3 + 2HCl → FeCl2 + CO2 + H2O
FeCl2 + Na2HPO4 → Fe(HPO4) + 2NaCl
Equations for dissociation of electrolytes:
a. Bi(NO3)3 → Bi3+ + 3NO3-
b. Fe(OH)2SO4 → Fe2+ + 2OH- + SO4^2-
c. HMnO4 → H+ + MnO4-
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The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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How does the location of an energy generation source aect the available potential energy?
Answers
Potential energy depends on location to generate energy.
Potential energy is a type of stored energy that depends on how various system elements interact with one another. A spring's potential energy rises when it is compressed or expanded. A steel ball has more potential energy if it is raised above the ground as opposed to dropping to it. The more it is raised, the more work it is capable of. Instead of being a property of specific entities or particles, potential energy is a property of systems. For instance, the potential energy of the system composed of Earth and the raised ball increases as they move apart.
Systems with components whose configurations, or relative positions, affect the strength of the forces they apply to one another, create potential energy.
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How is the rate of a chymotrypsin-catalyzed reaction affected by using more enzyme in the reaction mixture
Answers
The rate of a chymotrypsin-catalyzed reaction will increase by using more
enzyme in the reaction mixture.
The rate of a chemical reaction and the enzyme concentration have a direct
relationship. As concentration increases, the rate of a chemical reaction
also increases and vice versa.
In this scenario, we were told more enzyme was used in the reaction mixture
which signifies an increase in the concentration and a corresponding
increase in the rate of reaction.
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what does celery, a wooden spoon, and oil/gasoline have in common?
Answers
Answer:
All of them are organic compounds which have carbon as their main atom in the structure.
Explanation:
Hello.
In this case, since organic chemistry is the study of all the compounds having the carbon atom as their main atom, all the vegetables, animals, an in general, living things are composed by lipids, proteins, and other organic substances with this feature. Moreover, wood-based materials are mainly composed by lignin which is an organic polymer also having carbon as the main atom. In addition, oil and gasoline are organic chemical compounds with a lot of applications in daily life which also contain carbon atoms in their structure.
In such a way, a celery, a wooden spoon, and oil/gasoline have the carbon atom in common as their main atom in their chemical structures.
Best regards.
Why doesn't the red line showing the IR spectrum emitted from the earth's surface match the blue line showing the expected IR spectrum from a 300˚C object?
-Some of the light emitted is used to heat building.
-Molecules in the atmosphere such as CO2 and H2O absorb the radiation.
-Contrails from airplanes absorb the radiation cause the dip at 14 micrometers.
-IR radiation at 14 micrometers is not actually emitted by the earth's surface.
Answers
The red line showing the IR spectrum emitted from the earth's surface does not match the blue line showing the expected IR spectrum from a 300˚C object because:
Molecules in the atmosphere such as CO₂ and H₂O absorb the radiation; option B.What is IR spectroscopy?IR spectroscopy studies Infrared (IR) light in the electromagnetic spectrum.
Sensors are used by thermal detection systems, also known as infrared detection systems, to detect radiation in the infrared region of the electromagnetic spectrum.
In order to create an electronic signal, an infrared camera must first detect the thermal energy or heat, that the scene being seen emits. After processing this signal, an image is created.
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When potassium chloride is heated it decomposes into potassium chloride and oxygen gas.
a. Write a balanced chemical equation for this decomposition reaction.
b. Determine how many liters of oxygen gas at STP could be produced from 500.0 g of potassium chlorate.
Answers
134.3 liters of oxygen gas at STP could be produced from 500.0 g of potassium chlorate.
We can use the ideal gas law to find the volume of hydrogen at STP (standard temperature and pressure, 0°C and 1 atm) that would contain 58.7 moles: PV = nRT
(1 atm) V = (58.7 mol) (0.08206 L atm/mol K) (273.15 K), V = 1,275 L
Finally, we can use the ideal gas law to calculate the volume of O2 produced at STP (standard temperature and pressure, which is 0°C and 1 atm):
PV = nRT
V = nRT / P
V = (6.12 mol)(0.0821 L•atm/mol•K)(273 K) / 1 atm
V = 134.3 L
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She chops and shapes some of the larger pieces of wood into uniform shapes to build her shelter. What kind of change is taking place as the wood is chopped?
Answers
Answer:
a change in physical property
Which two atoms are isotopes of each other? A. Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. B. Mg with a mass number of 24 and an atomic number 12, and Al with a mass number 24 and an atomic number 13. C. Mg with a mass number 24 and an atomic number 12, Mg with a mass number 25 and an atomic number 12. D. Na with a mass number 23 and an atomic number 11, Mg with a mass number 25 and an atomic number 12.
Answers
The two atoms are isotopes of each other are Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. The correct option is A.
What are isotopes?Isotopes are atoms with the same number of protons but differing numbers of neutrons.
They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.
An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight.
However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.
They can be referred to as isotopes because Si, which has a mass number of 27 and an atomic number of 14, and Mg, which has a mass number of 25 and an atomic number of 12, both have 13 protons.
Thus, the correct option is A.
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which is an example of a colloid? a mixture that settles out, a mixture that scatters light, a mixture that is separated by filtration, or a salt and water mixture?
Answers
These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)
A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct
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Note Complete Question
which is an example of a colloid?
a mixture that settles out,
b mixture that scatters light,
c mixture that is separated by filtration,
d salt and water mixture?
What is and ionic bond and how it forms and why it forms
Answers
What is the empirical formula for C6H12?
Answers
Answer:
The empirical formula of C6 H12,
What is the volume of an object with the mass of 7.9 grams in the density of 2.28g/ml.
Answers
Answer:
3.7mL is the volume of the object
Explanation:
To convert the mass of any object to volume we must use density that is defined as the ratio between mass of the object and the space that is occupying. For an object that weighs 7.9g and the density is 2.28g/mL, the volume is:
7.9g * (1mL / 2.28mL) =
3.7mL is the volume of the object50 POINTS!!!!! AND BRAINLIEST!!!!! Answer the following question using the CER: Claim, Evidence, Reasoning 1. Does the chemical reaction presented in the data table follow the law of conservation of matter? Justify your answer with evidence from the document. 2. Balance the equation from the experiment. Make sure you don't change your subscripts but they can be typed as big numbers, as long as they are in the formula correctly.
Answers
Answer:
Claim: The chemical equation presented in the data table does NOT follow the law of conservation of matter
Evidence: Since we initially have 14.25 grams of Na and 9.5 grams of HCl
we will find the number of moles in each, to further apply stoichiometry
So,
Moles of Na: Given mass/Molar Mass = 14.25/23 = 0.62 Moles of Na
Moles of HCl: Given mass/Molar Mass = 9.5/36.5 = 0.26 Moles of HCl
Since HCl is the limiting reagent in this reaction,
0.26 Moles of Na will be consumed, which is equal to
5.98 grams of Na
Reasoning:
We are given that the total mass of the product is 22.98 grams
but through stoichiometry, we have found that only (9.5 + 5.98) = 15.48 grams of product can possibly be formed
Hence, the reaction presented in the table does NOT follow the law of conservation of matter
more reactive material can help to stop iron rusting please answer true or false
Answers
Answer:
true
Explanation:
and don't look up the link everyone says it's scam bots
The compound butanol has the following structural formula.
A string of 4 C atoms are bonded above, left, and below to H. The right-hand end is bonded to O, which in turn is bonded to H.
Which of these is a structural isomer of butanol?
A string of 4 C atoms are bonded above, below, left and right to H.
A string of 4 C atoms is bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H.
A string of 4 C atoms is bonded above, below, left, and right to H, but the chain is interrupted between the first and second C, which are bonded to an O between them.
A string of 4 C atoms is bonded above, below, and left to H, except the last C has no H below and is double-bonded to an O to the right.
Answers
The structural formula of butanol is C4H9OH. It consists of a chain of four carbon atoms, with a hydroxyl (-OH) group attached to one of the carbon atoms. Butanol has several structural isomers, which have the same molecular formula but different structural formulas.
A structural isomer is a compound that has the same molecular formula as another compound but has a different arrangement of its atoms. A string of 4 C atoms are bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H is a structural isomer of butanol.
This is called butan-2-ol. The structural formula of butan-2-ol is CH3CH(OH)CH2CH3. In this isomer, the hydroxyl group is attached to the second carbon atom in the chain, whereas in butanol, the hydroxyl group is attached to the first carbon atom in the chain.
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1. Electricity is the energy that alters physical state.
True
False
Answers
A 25 ml solution of 0.5 M NaOH is titrated until neutralized into a 50 ml sample of HCl?
Answers
The concentration of the acid is \(0.25 M\).
Titration is a laboratory technique used to determine the concentration of a substance in a solution by reacting it with a standardized solution of known concentration.
The titration formula can be given by,
(Volume of the Base) \(\times\) (Normality of the Base) = (Volume of the Acid) \(\times\) (Normality of the Acid)
\(\Rightarrow V_1N_1=V_2N_2\)
Given, the volume of the base (\(NaOH\)), \(V_1 =25 ml\).
The concentration of the base (\(NaOH\)), \(M_1=0.5 M\).
The equivalence of the base (\(NaOH\)) is \(1\).
Hence, the normality of the base (\(NaOH\)), \(N_1=\frac{0.5}{1}N=0.5N\).
Given, the volume of the acid (\(HCl\)), \(V_2 =50 ml\).
Let us assume that the normality of the acid (\(HCl\)) \(N_2\).
Substitute the values in the given formula of titration.
\((25\times0.5)=(50 \times N_2)\\\Rightarrow 12.5=50N_2\\\Rightarrow N_2=\frac{12.5}{50} N\\\Rightarrow N_2=0.25 N\)
Hence, the normality of the acid (\(HCl\)), \(N_2=0.25 N\).
The equivalence of the acid (\(HCl\)) is \(1\).
Therefore, the concentration of the acid, \(M_1=\frac{0.25}{1}=0.25 M\).
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Which statement correctly compares the masses of subatomic particles in an atom such as carbon?
A- an electron has a greater mass than a proton .
B- A proton has about the same mass as an electron .
C- A proton has about the same mass as a neutron .
D- neutrons protons and electrons have the same mass .
Answers
Answer:
C- A proton has about the same mass as a neutron .
Explanation:
In an atom such as a carbon atom, the masses of the proton and neutrons are the same.
The mass of the electrons is very negligible.
Protons are the positively charged particles in an atomNeutrons do not carry any charges Both protons and neutrons have similar masses. They contribute the bulk of the mass of the atom. The electrons carry negative charges and they have negligible masses.The mass of protons and neutrons are similar.
The subatomic particles have been electrons, protons, and neutrons. The mass of protons have been equal to the mass of neutrons. Thus option C is correct.
The atoms has been found to be consisted of the positively charged nucleus and the negatively charged electrons. The nucleus has been consisted of the neutrons and protons.
The number of electrons and protons has been equal in an atom. The neutrons number has been varied in the atom. The mass of the electron has been negligible in an atom, and thereby the mass of the atom has been dependent on the mass of the nucleus.
The mass of the neutrons has been almost equal to the mass of protons. Thus option C is correct.
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What mass of NaCl is needed to produce a 26.4 mol/L with a 1.7 L volume?
Answers
we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.
To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.
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During what phase of meiosis does the DNA coil into visible chromosomes?
O prophase
O anaphase
O metaphase 1
o telophase!
Answers
Answer:
prophase
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes.
Answer:
prophase I
Explanation:
Which of the following test tubes
(5 Points) would have the fastest rate of reaction? Defend your answer.
(5 Points) would have the slowest rate of reaction? Defend your answer.After presenting a reason and evidence in an argumentative essay, a writer should present
Answers
Answer:
could you explain your question more
Explanation:
Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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PLEASE HELP ME NO ONE WILL THIS IS IMPORTANT ALOT OF POINTS! A student's favorite drink is sweet tea. Every morning he makes it by adding exactly thirty grams of sugar and one tea bag to one liter of hot water. Some days his tea does not taste as sweet as other days. Those same days he notices that there is sugar sitting at the bottom of the cup that will not dissolve no matter how long he stirs. He decided to filter out the remaining sugar and keep track of the data in the graph below.
Explain why different amounts of sugar might dissolve at different times.
Consider:
1. which day the least sugar dissolved and which day the most sugar dissolved.
2. what could have caused less sugar to dissolve on some days
3. what the student could do to his drink to make more sugar dissolve.
Be sure to consider the completeness of your response, supporting details, and accurate use of terms. Your response should be 6-8 complete sentences.
Answers
The solubility of a substance, such as sugar, depends on several factors, including temperature, pressure, and the presence of other solutes. In this case, the student adds the same amount of sugar and tea bag to the same amount of hot water every day, but the temperature of the water could vary from day to day, affecting how much sugar dissolves.
According to the graph, the least amount of sugar dissolved on day 3, while the most sugar dissolved on day 5. The difference in temperature on these days could explain this variation. On day 3, the water may have been cooler, making it more difficult for the sugar to dissolve. On the other hand, on day 5, the water may have been hotter, which could have increased the solubility of the sugar.
To increase the amount of sugar that dissolves in the tea, the student could try using hotter water or stirring the sugar more vigorously to distribute it evenly throughout the water. Alternatively, the student could try adding the sugar gradually while stirring to give it more time to dissolve before adding more.
Answer:
I'm not 100% sure on this because mine hasn't been graded yet, but here are the answers I submitted.
Explanation:
Which day the least sugar dissolved and which day the most sugar dissolved:
Day 4 is when the least sugar dissolved, and Day 2 is when the most sugar dissolved.
What could have caused less sugar to dissolve on some days:
The temperature of the tea could have caused the sugar not to dissolve on some days.
What the student could do to his drink to make more sugar dissolve.
The student would need to add the sugar to the tea as soon as it's done boiling. The Sugar will dissolve faster in a warmer tea due to more energy of movement.
Be sure to stir the tea as you add the sugar. Stirring the sugar into the tea speeds up the rate of dissolving by helping distribute the sugar particles throughout the tea.
If the student were to use granulated sugar, those are smaller particles and have greater surface area. Greater surface area allows for more contact between the tea and the sugar.
Draw clearly the structural formulas of the given compounds. (a) 3-methyl heptane
Answers
See the attached image.
Describe the trend of the reactivity of the elements in group VII
Answers
The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group
Answer & Explanation:
The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.