Answers
Answer:
∆H° = 790 kJ/mol
Explanation:
Hello,
In this case, by using the Hess law, we should handle the given reactions as shown below:
- The reaction:
2 Sr(s) + O₂ (g) → 2 SrO (s)
Should be inverted as:
2 SrO (s) → 2 Sr(s) + O₂ (g)
So the enthalpy of reaction changes to ∆H° = 1184 kJ/mol
- The reaction:
CO₂ (g) → C (s) + O₂ (g)
Should be also inverted as:
C (s) + O₂ (g) → CO₂ (g)
So the enthalpy of reaction changes to ∆H° = -394 kJ/mol
- Then, we add the modified reactions to obtain the desired reaction:
2 SrO (s) + C (s) + O₂ (g) → 2 Sr(s) + O₂ (g) CO₂ (g)
C(s) + 2 SrO(s) → CO₂ (g) + 2 Sr(s)
Therefore, the resulting enthalpy of reaction is:
∆H° = 1184 kJ/mol - 394 kJ/mol
∆H° = 790 kJ/mol
Best regards.
Considering the Hess's Law, the enthalpy change for the reaction is 790 kJ/mol.
Hess's Law indicates that the enthalpy change in a chemical reaction will be the same whether it occurs in a single stage or in several stages. That is, the sum of the ∆H of each stage of the reaction will give us a value equal to the ∆H of the reaction when it occurs in a single stage.
In this case you want to calculate the enthalpy change of:
C(s) + 2 SrO(s) → CO₂ (g) + 2 Sr(s)
which occurs in two stages.
You know the following reactions, with their corresponding enthalpies:
Equation 1: 2 Sr (s) + O₂ (g) → 2 SrO (s) ∆H° = -1184 kJ/mol
Equation 2: CO₂ (g) → C (s) + O₂ (g) ∆H° = 394 kJ/mol
Because of the way formation reactions are defined, any chemical reaction can be written as a combination of formation reactions, some going forward and some going back.
In this case, first, to obtain the enthalpy of the desired chemical reaction you need 1 mole od C (s) on reactant side and it is present in second equation. But since this equation has 1 mole of C (s) on the product side, it is necessary to locate this on the reactant side (invert it). And when an equation is inverted, the sign of delta H also changes.
Now, 2 moles of SrO (s) must be a reactant and is present in the first equation. Since this equation has 2 moles of Sr0 (s) on the product side, it is necessary to locate the O on the reactant side (invert it) and the sign of delta H also changes.
In summary, you know that two equations with their corresponding enthalpies are:
Equation 1: 2 SrO (s) → 2 Sr (s) + O₂ (g) ∆H° = 1184 kJ/mol
Equation 2: C (s) + O₂ (g) → CO₂ (g) ∆H° = -394 kJ/mol
Adding or canceling the reactants and products as appropriate, and adding the enthalpies algebraically, you obtain:
C(s) + 2 SrO(s) → CO₂ (g) + 2 Sr(s) ΔH= 790 kJ/mol
Finally, the enthalpy change for the reaction is 790 kJ/mol.
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At what time was the frog sitting still or at rest
Answers
Answer:
frogs don't spend all their time swimming, nor do they spend all ... The frog is capable of sitting perfectly still for hours on end, only to suddenly ... When a frog is resting or hunting, he will sit on whatever is handy.
Explanation:
Hope I helped if I did please mark me brainiest Thanks! <333 :3
14. Which group below correctly list bases that completely dissociate in water?
O a. NaOH, KOH, LIOH
O b. NH3, NH4OH, HCI
C. NaOH, H3PO4, MgOH
O d. NaOH, KOH, H2CO3
15. When the oxidation number increases the element is
decreases the element is
and if the oxidation number
O a. reduced, reduced
O b. reduced, oxidized
O c. oxidized, oxidized
O d. oxidized, reduced
16. The oxidation number for O in NaHCO3 is
O a. 1-
O b. 1+
O c. 2-
O d. 2+
17. The oxidation number for Na, Cr, and o respectively in the compound Na2Cro4
O a. 6+, 1+, 2+
O b. 1+, 6+, 2-
O c. 2-, 1+, 6+
O d. 1-, 2-, 3+
18. CuSO4 + 2NaOH --> Cu(OH)2 + Na2S04
The reaction above represents
O a. Oxidation
O b. Reduction
O c. Neutralization
O d. None of the above
19. A balloon with a volume of 5.0 L is filled with a gas at 2 atmospheres. If the pressure is reduced
to 1 atmospheres without a change in temperature, what would be the volume of the balloon?
O a. 5.0 L
b. 10 L
O c. 12 L
O d. 10 ml
Answers
Answer:14=D
15=B
16=D
17=C
18=A
19=D
Explanation: I did this and got a 100% °³°
58:27
1
Dominic made the table below to organize his notes about mixtures
Properties of Mixtures
has no set composition
must have more than one state of matter
must have more than one substance
What mistake did Dominic make?
The title should read "Properties of Solutions" because some mixtures do not have all of the properties listed
O There is a definite recipe to make each mixture, so the composition of a mixture is set.
Although it is possible to have more than one state, it is also possible to have only one state.
O A single substance can be used to make a mixture if the substance is composed of more than one element
Sao and Fit
Answers
Answer:
Although it is possible to have more than one state, it is also possible to have only one state.
Explanation:
The mistake Dominic made was stating that "although it is possible to have more than one state, it is also possible to have only one state."
Mixtures are impure substances with the following properties:
They have an indefinite composition
Their constituents retains their identities.
Constituents react differently to changed conditions.
They can easily be separated into constituents by physical methods.
There are two types of mixtures based on the number of phases coexisting:
Homogeneous mixtures have their constituents existing in just one phase.
Heterogeneous mixtures exists in at least two different phases.
Explanation:
Physical science:verification on newton's second law
Answers
F=ma
(a) when the mass of an object is fixed , measure the relationship between external force F and acceleration a.
(b) when the external force F. fixed , measure the relationship between mass of the moving object m and it's acceleration a .
Thank you.......Hope it will helps you
Can I get brainlist..........
The specific heat of palladium is 0.239 J/g°C. How much heat (q) is released when a 10.0 g piece of platinum cools from 100.0°C to 50.0°C?
Answers
Answer:
119.5 J
Explanation:
First we calculate the temperature difference:
ΔT = 100 °C - 50 °C = 50 °CThen we can calculate the heat released by using the following formula:
q = Cp * ΔT * mWhere q is the heat, Cp is the specific heat, ΔT is the temperature difference and m is the mass.
We input the data:
q = 0.239 J/g°C * 50 °C * 10.0 gq = 119.5 JA current of 3.91 A is passed through a Pb(NO3)2 solution for 1.70 h . How much lead is plated out of the solution?
Answers
The mass (in grams) of lead that will plate out of the solution, given that 3.91 A is passed through the solution for 1.7 h is 25.66 g
How do I determine the mass of lead?First, we shall determine the charge flowing through the solution. This is shown below:
Current (I) = 3.91 ATime (t) = 1.70 h = 1.7 × 60 × 60 = 6120 sCharge (Q) = ?Q = It
Q = 3.91 × 6120
Q = 23929.2 C
Finally, we shall determine the mass of lead that will plate out of the solution. Details below:
Balanced equation
Pb²⁺ + 2e —> Pb
Molar mass of Pb = 207 g/mol Mass of Pb from the balanced equation = 1 × 207 = 207 gNumber of faraday = 21 faraday = 96500 C2 faraday = 2 × 96500 = 193000 CFrom the balanced equation above,
193000 C plated 207 g of lead
Therefore,
23929.2 C will plate = (23929.2 × 207) / 193000 = 25.66 g of lead
Thus, the mass of lead that will plate out is 25.66 g
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Hydrogen covalently bonds with nitrogen to form the compound ammonia. Nitrogen becomes MORE chemically stable because
Question 4 options:
Hydrogen transfers an electron from nitrogen to fill it's outer energy level.
it partially fills its outer energy level with shared electrons from hydrogen.
Hydrogen acquires transferred electrons from nytrogen leaving nytrogen with 6 outer electrons.
it partially fills its outer energy level with transferred electrons from hydrogen.
Answers
Nitrogen becomes more chemically stable when it forms a covalent bond with hydrogen to form the compound ammonia (NH3). The stability of the nitrogen in this compound is primarily due to the sharing of electrons between the nitrogen and hydrogen atoms.
In a covalent bond, atoms share electrons to achieve a more stable electron configuration. Nitrogen has five electrons in its outer energy level, which means it needs three more electrons to fill its outer energy level and achieve a stable configuration. On the other hand, hydrogen has one electron in its outer energy level and needs one more electron to complete its outer energy level.
When nitrogen and hydrogen combine to form ammonia, each hydrogen atom shares one electron with the nitrogen atom, and in turn, the nitrogen atom shares one of its electrons with each hydrogen atom. This sharing of electrons allows nitrogen to partially fill its outer energy level, completing a stable eight-electron configuration. Hydrogen, in turn, partially fills its outer energy level with a transferred electron from nitrogen.
By sharing electrons, the nitrogen in ammonia acquires a more stable electron configuration that resembles the stable configuration of noble gases. This stability contributes to the overall stability of the ammonia molecule. The covalent bond in ammonia provides a balance of electron sharing, allowing both nitrogen and hydrogen to achieve more favorable and stable electron configurations than they would individually.
In short, nitrogen becomes chemically more stable in the ammonia compound because it partially fills its outer energy level with shared electrons from hydrogen. This sharing of electrons allows the nitrogen to achieve a stable configuration, which contributes to the stability of the ammonia molecule as a whole.
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Answer:
it partially fills its outer energy level with shared electrons from hydrogen.
Explanation:
Hydrogen chloride dissolved in water yields hydrochloric acid. What is the
molar concentration of HCl if 3.65 g of hydrogen chloride is dissolved in 500 mL of
water?
Answers
Answer:
1500ml
Explanation:
molarity=3.65⋅g36.5⋅g⋅mol−1500⋅mL×10−3⋅L⋅mL−1=0.200⋅mol⋅L−1
Discuss the large-scale environmental impacts of soil pollution caused by industrial wastes.
Answers
Answer: Industrial processes including mining and manufacturing historically have been leading causes of soil pollution. Industrial areas typically have much higher levels of trace elements and organic contaminants. This is due to intentional and unintentional releases from industrial processes directly into the environment, including to the soil, adjacent water bodies, and the atmosphere.
Explanation:
A patient provides you a prescription for Percocet, a medication he has never taken before and his insurance company is requiring prior authorization. What steps should be taken?
Answers
To ensure insurance coverage for Percocet, it is essential to verify the patient's insurance coverage and check if prior authorization is required. If prior authorization is necessary, gather the required information, complete the authorization form, and submit it to the insurance company.
When a patient presents a prescription for a medication like Percocet, which requires prior authorization from the insurance company, several steps should be taken:
Verify Insurance Coverage: Check the patient's insurance coverage and confirm if prior authorization is required for Percocet. This can be done by contacting the insurance company or using an online portal provided by the insurer.
Review Prior Authorization Criteria: Understand the specific requirements set by the insurance company for obtaining prior authorization for Percocet. This may include documentation, medical history, and supporting evidence to justify the need for the medication.
Gather Patient Information: Collect relevant patient information, including medical records, diagnosis, and any previous treatments. This information will be used to support the prior authorization request.
Complete Prior Authorization Form: Fill out the necessary prior authorization form provided by the insurance company. Ensure that all required information is accurately entered, including the patient's details, prescriber information, and supporting documentation.
Submit the Request: Send the completed prior authorization form along with any supporting documents to the insurance company. This can be done electronically through their designated channels or by fax/mail, following their specified process.
Follow Up: Monitor the progress of the prior authorization request. Follow up with the insurance company to confirm receipt, inquire about any additional information needed, and track the status of the request.
Inform the Patient: Keep the patient informed about the prior authorization process, estimated timelines, and any potential out-of-pocket costs they may incur.
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Please I need an answer
Uncontrolled energy:
A. Produces order
B. Causes destruction
C. Can make things
D. Can do useful work
Answers
Answer:
B: causees destrution
Explanation:
its right trust me
Which of the following is a constant?
A. wavelength (λ)
B. Planck (h)
C. energy (E)
D. frequency (f)
Answers
B) Planck's constant (h)
a student mixed 20 grams of salt into a beaker with 200 milliliters of warm water. then, the student set the cup of saltwater on a windowsill undisturbed for one week. what changes did the student observe? include what happened when salt was mixed with warm water and what most likely happened to the saltwater after one week.
Answers
Answer:
Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, resulting in a homogeneous solution.
Explanation:
An unknown gas, DD, reacts with fluorine gas to form the compound DF4(g)DF4(g), as represented by the following equation.
D(g)+2F2(g)âDF4(g)D(g)+2F2(g)âDF4(g)
A series of experimental trials were performed at 600âC600âC to determine the rate law expression for the reaction. Data from the trials are shown below.
Initial PDPD
(torrtorr)
Initial PF2PF2
(torrtorr)
Initial Rate of Appearance of DF4(g)DF4(g)
(torr/mintorr/min)
Trial 1 3000 3000 2.50Ã10â22.50Ã10â2
Trial 2 6000 3000 5.00Ã10â25.00Ã10â2
Trial 3 3000 6000 10.0Ã10â210.0Ã10â2
(a) A student claims that the reaction is first order with respect to D(g)D(g). Do you agree or disagree? Justify your answer using the data above.
(b) What is the initial rate of disappearance of F2(g)F2(g) in trial 1? Justify your answer.
(c) A student claims that if element DD is in group 18, then the molecular geometry of DF4(g)DF4(g) is tetrahedral. Do you agree or disagree with the student? Justify your answer in terms of VSEPRVSEPR theory.
The particulate model shown below represents the moles of particles present in the container after D(g)D(g) and F2(g)F2(g) have reacted in a different experiment. Assume that each particle in the diagram represents one mole of the respective substance. (Note: The box corresponding to "Before Reaction" is intentionally left blank.)
(d) If the total pressure at the end of the reaction is 12âatm12âatm, what is the partial pressure of DF4(g)DF4(g)?
(e) Assuming that only DD and F2F2 are present in the container before the reaction, determine the number of moles of DD and F2F2 that were present in the initial reaction mixture.
D =â__________F2â=__________
The equation and enthalpy change for the reaction between D(g)D(g) and F2(g)F2(g) are given below.
D(g)+2âF2(g)âDF4(g)âÎHâ=â250âkJ/molrxnD(g)+2âF2(g)âDF4(g)âÎHâ=â250âkJ/molrxn
(f) How much heat is released when 4.0âmol4.0âmol of F2(g)F2(g) reacts with excess D(g)D(g)?
Fluorine can also react with another gas, E(g)E(g), according to the following equation.
E(g)+2âF2(g)âEF4(g)âÎHâ=â350âkJ/molrxnE(g)+2âF2(g)âEF4(g)âÎHâ=â350â¢âkJ/molrxn
(g) The student claims that the DâFDâF bond energy is greater than the EâFEâF bond energy. Do you agree or disagree? Justify your answer.
While investigating the properties of other diatomic molecules, the student finds the diagram below, which shows the potential energy of two nitrogen atoms versus the distance between their nuclei. The student incorrectly sketches the potential energy curve for two fluorine atoms, shown by the dotted line in the diagram.
(h) Explain the error with the studentâs sketch for F2(g)F2(g).
Answers
Initial rate of appearance of DF4(g) = 2.50 x 10-2 torr/min
D(g) + 2F2(g) → DF4(g)
By equation :
1/2 x rate of disappearance of F2(g) = rate of appearance of DF4(g)
In trial 1
1/2 x initial rate of disappearance of F2(g) = initial rate of appearance of DF4(g)
1/2 x initial rate of disappearance of F2(g) = 2.50 x 10⁻² torr/min
initial rate of disappearance of F2(g) = 2 x 2.50 x 10⁻² torr/min
initial rate of disappearance of F2(g) = 5.0 x 10⁻² torr/min
Initial rate of disappearance of F2(g) in trial 1 is 5.0 x 10⁻² torr/min.
\What is Concentration?Concentration is a measure of how much of a substance is dissolved in a given amount of liquid or other solution. It can be expressed in a variety of ways, such as molarity, molality, and mass percent. In chemistry, concentration is important because it affects the rate of chemical reactions and the extent to which they proceed.
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10. What is the molality of a solution
containing 288 g of calcium chloride
dissolved in 2.04 kg of water?
Answers
The choice of solution has a concentration of 1.144 mol/kg molality.
What exactly are molality and molarity?Molarity corresponds to the moles of solvent divided by the amount of solution in litres, whereas molality is equal with the moles of solvent divided by the quantity of solvent in kilogrammes.
Is one molarity the same as one molality?Since 1 mole of solute is present in 1 litre for the solution, which contains both the solute and the solvent, 1 molar aqueous solutions are more concentrated than one decays aqueous solutions.
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conclusion about filter press
Answers
Answer: A filter press is an efficient and economical machine for liquid/solid separation. ... The Slury – in a filter press operation the slurry is pumped into the chamber and against the filter media. The Filtrate – the liquid passes through the filter cloth and exits via the filter plate's filtrate ports.
Hope this helps... Stat safe and have a great day...
0.75 mol hydrogen sulfide (H2S)
Answers
Answer:
• Information and media literacy
Directions
Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the end of the activity, write
brief evaluation of your work.
Activity
Part A
Now that you have analyzed the resources provided in the lesson, write your own response to the question, What is the main reason the US Civil
War started? Base your
Explanation:
• Information and media literacy
Directions
Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the end of the activity, write
brief evaluation of your work.
Activity
Part A
Now that you have analyzed the resources provided in the lesson, write your own response to the question, What is the main reason the US Civil
War started? Base your
Answer: =378.94000053g
Explanation:
I think that explains it
What is this atom structure?
Answers
A polyatomic ion is several ________ bonded together with ___________ ionic charge.
Answers
Answer:
A polyatomic ion, also known as a molecular ion, is a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero. They form a stable grouping which carries a charge (positive or negative). The group of atoms as a whole acts as a charged species in forming an ionic compound with an oppositely charged ion.
draw the structure(s) of the branched ether(s) with the chemical formula c4h10o?
Answers
The structure of the branched ether of chemical formula c4h10o, is \(CH_3 - CH_2 - CH_2 - O - CH_2 - CH_2 - CH_3.\)
\(C_4H_{10} O\) is a branched ether, also known as an alkoxyalkane or a glycol ether. It is an organic compound composed of four carbon atoms, ten hydrogen atoms, and one oxygen atom. Its molecular formula is \(C_4H_{10} O\)and its molecular weight is 86.13 g/mol.
Its structure is linear, with a carbon backbone and an oxygen atom attached to two of the carbons in the chain. The oxygen atom is then connected to two methyl (\(CH_3\)) groups, one on each side of the central carbon atom.
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8. Base your answer to the following question on the equation below.
2H2(g) + O2(g) → 2H₂O()+571.6 kJ
Identify the information in this equation that indicates the reaction is exothermic.
Answers
The positive value of 571.6 kJwhich is the enthalpy change tells us that it is exothermic
What is an exothermic reaction?When energy is released into the surrounding area during a chemical reaction, it's considered an exothermic reaction with ΔH < 0. Conversely, endothermic reactions result from heat absorption with ΔH > 0.
The provided equation's positive value of 571.6 kJ reveals that heat is pouring out of the reaction, causing negative changes in enthalpy and firmly placing this chemical event as exothermic in nature.
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Write a short essay about life in the Han Dynasty, comparing it to life today. Make sure to include key features:
-Family
-Government
-Social Structure
-Religion
-Trade
Answers
Answer:
Life in the Han Dynasty (206 BCE - 220 CE) differed significantly from today in family, government, social structure, religion, and trade. For example, the Han Dynasty emphasized a patriarchal family structure, where the eldest male held authority, and filial piety was highly valued. In contrast, contemporary societies embrace more egalitarian family dynamics with shared decision-making.
The government system of the Han Dynasty relied on a centralized bureaucracy and emphasized meritocracy, while modern societies often adopted democratic systems. Socially, the Han Dynasty followed a hierarchical model influenced by Confucian principles, whereas contemporary societies strive for greater equality and social mobility.
Religion in the Han Dynasty combined Confucianism, Taoism, and Buddhism, whereas modern societies exhibit diverse religious beliefs. Lastly, trade in the Han Dynasty thrived along the Silk Road, while modern trade was globally interconnected and facilitated by technological advancements. These differences highlight the evolution of society over time.
Explanation:
Read the statement about Mount Vesuvius. Mount Vesuvius erupted in 79 CE and destroyed the ancient city of Pompeii. Why is the statement free of bias? It is based on opinion. It is a fair statement of fact. It expresses one specific view. It exaggerates details of the event. Explain good or ill report
Answers
Answer:
It is a fair statement of fact
Explanation:
The statement is a fact that is unopinionated and it does not exaggerate details of the event it just states the fact without opinions or exagerrations. This is why its unbiased.
The statement that is given is free of bias because It is a fair statement of fact. The correct option is B.
What is a statement?A statement is affirmative that is proposed and based on facts or the condition of the situation. It is a declaration. Statements don't pose queries, issue requests, or issue directives. They are not exclamations, either.
Scientific statements are generally based on facts and true results that came from an experiment. Like the one here, about Mount Vesuvius.
The statement simply tells the truth without opinions or exaggerations; it is a fact that is opinionated but does not embellish the specifics of the occurrence. This is why it is objective.
Thus, the correct option is B. It is a fair statement of fact.
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2. Show the calculation supporting the claim that atmospheric pressure near sea level corresponds to the pressure exerted by a column of mercury that is about 760 mm high. Considering the density of mercury = 13.6 g/cm³.
Answers
The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm.
To calculate the pressure exerted by a column of mercury, we can use the formula:
Pressure = density * gravity * height
Given:
Density of mercury = 13.6 g/cm³
Height of the mercury column = 760 mm = 76 cm
Acceleration due to gravity = 9.8 m/s²
First, we need to convert the height of the mercury column from centimeters to meters:
Height = 76 cm * (1 m / 100 cm) = 0.76 m
Now, we can calculate the pressure:
Pressure = 13.6 g/cm³ * 9.8 m/s² * 0.76 m
To ensure consistent units, we need to convert the density from grams per cubic centimeter (g/cm³) to kilograms per cubic meter (kg/m³):
Density = 13.6 g/cm³ * (1 kg / 1000 g) * (1 cm³ / (1e-6 m³))
Density = 13600 kg/m³
Plugging in the values into the pressure formula:
Pressure = 13600 kg/m³ * 9.8 m/s² * 0.76 m
Pressure = 99992.8 Pa
We can express the pressure in terms of atmospheric pressure:
1 atm = 101325 Pa (approximately)
To compare the pressure with atmospheric pressure, we can convert 99992.8 Pa to atm:
Pressure in atm = 99992.8 Pa / 101325 Pa/atm
Pressure in atm ≈ 0.987 atm
The pressure exerted by a column of mercury that is about 760 mm high corresponds to approximately 0.987 atm. Since atmospheric pressure near sea level is approximately 1 atm, this calculation supports the claim that atmospheric pressure near sea level is equivalent to the pressure exerted by a column of mercury about 760 mm high.
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WILL AWARD BRAINLIEST! I NEED HELP PLEASE! Match the states of matter for each of the five lines below.
Answers
Answer:
see explanations
Explanation:
The graphic is the heating curve for water. Note that it is divided into 5 distinct heat flow segments. The segments with changing slopes are single phase segments with changes in temperature values. From left to right segment A is solid ice being warmed to it's melting point. Segment B is the melting segment in which 2 phases are in contact (solid + liquid). Note that addition of heat does not change the temperature. Segment C is warming of the liquid (single phase) up to its boiling point. At the boiling point the liquid begins to pass into the gas phase and again 2 phases are in contact; i.e., liquid & gas. Note again when two phases are in contact no temperature change occurs. Finally, segment E is the heating of the pure, single phase gas.
In summary ...
Segment A => heating single phase (solid) ice up to melting pt.
Segment B => melting of ice => 2 phases in contact (s & l) ΔT = ∅.
Segment C => heating single phase (liquid) water up to boiling pt.
Segment D => boiling of liquid => 2 phases in contact (l & g). ΔT = ∅.
Segment E => heating single phase (steam) up to desired temperature.
For what it's worth, the equation for the segments that show increasing temperature values is q = mcΔT (m= mass, c = specific heat & ΔT temp change.
The segments with zero slopes (horizontal lines) are defined by equations q = m·ΔHₓ where m = mass & ΔHₓ = heat of fusion (a constant = 335 j/g). The same is true for the line at 100°C where q = m·ΔH(v) where m = mass & ΔH(v) is the heat of vaporization (a constant = 2259 j/g.
Calculations involve calculating the amount heat transfer for each segment individually and then adding the heat values to obtain the total heat transfer.
If you need more instruction on this topic, kick back a note and I'll try to help clarify. Good Luck, Doc :-)
Answer:
Picture attached has answers
Explanation:
Data Table 3: Polystyrene Test Tube, 12x75mm
Volume of water at room temperature (V1 in ml)
Volume of gas in polystyrene tube at boil (V2 in mL)
Temperature of gas at boil inside polystyrene tube (°C)
Volume of gas in polystyrenetube at room temperature (V3 in mL)
Temperature of gas at room temperature (°C)
Need help with data table 3: polystyrene test tube, 12x75mm
Answers
Answer:
Experiment 8 E Data Table 3 fl Data Table 4 fl Data Table 5 fl Data Table 6 Data Table 3: Polystyrene Test Tube, 12x75mm Volume of water at room temperature (V1 in mL) Volume of gas in polystyrene tube at boil (V2 in mL) Temperature of gas at boil inside polystyrene tube (°C) Volume of gas in polystyrenetube at room temperature (V3 in mL) Temperature of gas.
Explanation:
Hope this helps
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A sample has a mass of 1.2 g and a volume of 1.1 cm? What is the density of this sample?
Answers
Answer:
Density is a physical quantity, defined as the ratio of body mass to the volume occupied by this body. The average body density is the ratio of body weight to its volume.
Since the mass in a body can be distributed unevenly, a more adequate model defines the density at each point of the body as a derivative of mass over volume.
Thus, to obtain the density of a sample, its mass must be divided by its volume. Thus, the density of the sample is 1.2 / 1.1, that is, 1.09 g/cm3.
as i increase the amount of solute without changing the amount of solvent i increase the solutions....?
Answers
Answer:
concentration?
Explanation:
solute = The dissolved substance in a solution.
solvent = The liquid in which the solute dissolves to form a solution.
Answer:
the only marked thing was in new game for the quiz that link yes to be in a relationship
Explanation:
you followed a 1 or a 1 year of high.
In Thomas Cole's The oxbow who is the one figure depicted in the landscape and what is he doing
Answers
Answer:
In Thomas Cole's painting "The Oxbow," Thomas Cole, the artist, shows himself sitting in the landscape while painting it.
Explanation:
In the painting called "The Oxbow" by Thomas Cole, the artist actually put himself in the picture. He's sitting right in the middle of the landscape, just like he placed himself in the painting, as if taking a selfie while working on it. It's like he took a snapshot of himself while he was working on the painting. This shows how much he cared about creating the artwork and how he felt a personal connection to the beautiful scenery. It's really fascinating because it gives us a glimpse into how he saw himself as an artist and how he wanted to capture the incredible beauty of nature through his art.
On the line provided, write the formula for the compound made by each of the following. (3 pts each) 20. Mgand NO3-1, 21. CIO3-1 and K 22. Ca and So4-2, 23. NH4+1 and SO4-2, 24. C2H30-1, ' and H 25. Hand CO, t
Answers
Answer:
20. Mg(NO3)2
21. KClO3
22. CaSO4
23. (NH4)2SO4
24. HC2H3O
25. CO is carbon dioxide, which is neutral and would not combine with a hydrogen ion. Did you mean H and CO3(2-)? That would be H2CO3 (carbonic acid)
Explanation:
You have to match the charges of the Cations and Anions.