Which change of state is shown in the model?
condensation
deposition
boiling
freezing
[tex]\boxed{\text{Deposition}}[/tex] is shown in the given model.
Further Explanation:
Condensation
The process by which a substance in its gaseous or vapor form is transformed into its liquid form is termed as condensation. It is just the reverse of evaporation. The random motion of gas particles is reduced and they come together to form a liquid. This is done by altering the temperature and pressure of the substance.
Deposition
The phase transition due to which a gas or vapor transforms directly into solid by not going through the liquid phase is termed as deposition. It is a thermodynamic process. This process occurs when water vapors release enough of its thermal energy and get converted into solids directly without passing through the liquid state. It is the opposite of what is done in the sublimation process and is therefore known as desublimation.
Boiling
The phase transition due to which gaseous or vapor state is formed from the liquid state is known as boiling. This takes place when a substance in its liquid state is heated to its boiling point.
Freezing
It is a process in which the substance gets converted from its liquid state to a solid state. It is just the reverse of melting. In this phase transition, heat is released from the substance and the liquid particles come closer to form solid. The formation of ice is an example of freezing.
In the given model, gaseous or vapor state is transformed into a solid state and this phase change occurs in case of deposition. Therefore deposition is shown in the given model.
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Grade: Senior School
Chapter: Phase transition
Subject: Chemistry
Keywords: deposition, freezing, boiling, solid, liquid, vapor, condensation, desublimation, thermodynamic process.
Compound X has the molecular formula C3H6, and Compound Y has the molecular formula C6H12. How are the two compounds related? A.They are made of the same elements, but are different compounds B.They are identical compounds expressed in different ways. C. They are different compounds, but made from the same molecule.
How many grams of h 2 are needed to produce 12.95 g of n h 3 ?
Answer is: mass of hydrogen is 2.28 grams.
Balanced chemical reaction: 3H₂ + N₂ → 2NH₃.
m(NH₃) = 12.95 g; mass of ammonia.
n(NH₃) = m(NH₃) ÷ M(NH₃).
n(NH₃) = 12.95 g ÷ 17.03 g/mol.
n(NH₃) = 0.76 mol; amount of ammonia.
From chemical reaction: n(H₂) : n(NH₃) = 3 : 2.
n(H₂) = 3 · 0.76 mol ÷ 2.
n(H₂) = 1.14 mol; amount of hydrogen.
m(H₂) = 1.14 mol · 2 g/mol.
m(H₂) = 2.28 g; mass of hydrogen.
A piece of metal weighing 5.10 g at a temperature of 48.6 c was placed in a calorimeter in 20.00 ml of water at 22.1 degrees c the final equilibrium temperature was found to be 29.2 what is teh specific heat of the metal
At the final equilibrium temperature, the specific heat capacity of the metal is 5.999 J/g°C.
Given the following data:
Mass of metal = 5.10 gramsFinal temperature of metal = 48.6°CInitial temperature of water = 22.1°CFinal temperature of water = 29.2°CMass of water = 20.00 ml = 20 gramsSpecific heat capacity of water = 4.18 J/g°CTo find the specific heat capacity of the metal:
Mathematically, quantity of heat is given by the formula;
[tex]Q = mc\theta[/tex]
Where:
Q represents the quantity of heat.m represents the mass of an object.c represents the specific heat capacity.∅ represents the change in temperature.The quantity of heat lost by the water = The quantity of heat gained by the metal.
[tex]Q_{lost} = Q_{gained}\\\\mc\theta = mc\theta\\\\20(4.18)(29.2 - 22.1) = 5.10c(48.6 - 29.2)\\\\83.6(7.1) = 5.10c(19.4)\\\\593.56 = 98.94c\\\\c = \frac{593.56}{98.94}[/tex]
Specific heat capacity of metal, c = 5.999 J/g°C
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what are the characteristics of a plasma
Answer:
After the well-known solids, liquids, and gases, plasmas are considered as the fourth state of matter. They are found rarely on Earth, however, they are found in enormous quantity all through the universe. As they comprise free-flowing charged particles, plasmas exhibit many specific features.
In the majority of the plasmas, the electrons and protons take place in equal numbers, forming it electrically neutral. As they flow liberally, they are influenced by magnetic and electric fields in the manner not witnessed in the other forms of matter. These fields can affect plasmas over higher distances, warping, pinching, and modeling them, like the twisting flares observed on the Sun's surface.
The pressure 65 meters under water is 739 kPa. what is the pressure in atm
Answer: The pressure under the water is 7.29 atm
Explanation:
We are given:
Pressure under the water = 739 kPa
To convert into atm, we use the conversion factor:
1 atm = 101.325 kPa
Converting the pressure from kilo pascals to atmospheres, we get:
[tex]\Rightarrow 739kPa\times \frac{1atm}{101.325kPa}=7.29atm[/tex]
Hence, the pressure under the water is 7.29 atm
In the reaction , Zn + HCl—> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced ?
A. 0.382 g of H2
B. 0.479 g of H2
C. 0.7865 g of H2
D. 0.484 g of H2
0.479 g of hydrogen will be produced if 25 grams Zn are reacted with 17.5 grams HCl.
What is hydrochloric acid?Hydrochloric acid is an aqueous solution of hydrogen gas and chlorine gas.
The reaction is
[tex]\rm Zn + 2 HCl = ZnCl2 + H_2[/tex]
The number of moles present in Zn will be
[tex]\rm \dfrac{25g}{65.38g/mol} = 0.3824 mol[/tex]
The number of moles present in HCl will be
[tex]\rm \dfrac{ 17.5g}{36.46g/mol} = 0.479mol[/tex]
The mass of hydrogen present is [tex]\rm 0.479mol \times 1/2 \times 2g/mol = 0.479g[/tex]
Thus, The correct option is B. 0.479 g.
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It took Jackie two hours to mow the lawn. Two weeks later it took her one and one-half hours to mow the lawn. What can be said about the amount of power used by Jackie the second time she mowed the lawn?
Answer: The amount of power used by Jackie will be more the second time.
Explanation: Power can be written as:
[tex]Power=\frac{Work}{Time}[/tex]
As the power and time follow inverse relationship, the amount of power used by Jackie will be less in first case because the time taken is more.
In the second case, the time taken is less than the first case, so the power used will be more.
What would happen if there was no sodium potassium pump?
A container at stp contains 3.46 moles of neon gas. What is the volume of the neon gas?
It took 4.5 minutes for 1.0 l helium to effuse through a porous barrier. how long will it take for 1.0 l cl2 gas to effuse under identical conditions?
Using Graham's Law of Effusion, we can determine that it takes approximately 4.2 hours for 1.0 l of Cl2 gas to effuse under the same conditions as helium, due to Cl2's higher molar mass.
Explanation:This question can be answered using Graham's Law of Effusion, which states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass. This means that lighter gases effuse faster than heavier ones. Effusion is the process by which a gas escapes through a pinhole into a vacuum.
The molar mass of helium (He) is approximately 4 grams/mole, while the molar mass of chlorine (Cl2) is approximately 70 grams/mole. If it took 4.5 minutes for 1.0 l helium to effuse, then we can use Graham's law to calculate the time it will take for 1.0 l of Cl2 gas to effuse under the same conditions. It takes about 4.2 hours for 1.0 l of Cl2 gas to effuse under the same conditions as helium.
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Bruce left some butter out in his kitchen. Bright sunlight came in through the window and melted the butter. Heat energy from the sun is called
Answer:
Solar radiation
Explanation:
In general there are three forms of energy: heat, light and sound. Energy transfer takes place as energy moves from one object to another in a certain medium or in vacuum.
The heat energy or the electromagnetic energy from sun strikes the earth surface in the form of radiation. This is also called solar energy or solar radiation.
The rate of a chemical reaction in a cell is the measure of how
I need help quickly. Can someone please check over my answers and tell me if I am correct? I'm on a time limit. I will fan and medal. Even for just attempting.
1.) Molecules involved in a chemical reaction must collide to react. What is this concept called?
(Points : 3)
collision theory (My answer)
entropy
enthalpy
reaction rate
2.) Which of the following equations is used to describe reaction rates?
(Points : 3)
∆H T∆S
∆[reactant or product]/∆time (My answer)
Sproducts Sreactants
pV = nRT
If a solution of hf (ka = 6.8 10-4) has a ph of 3.67, calculate the total concentration of hydrofluoric acid.
The concentration of hydrofluoric acid in the solution, calculated using the given pH and the acid dissociation constant Ka, is about 0.069 M.
Explanation:The problem is asking us to find the concentration of hydrofluoric acid in a solution where pH and Ka are given. We can use the following formula that relates pH, Ka, and the concentration of the acid [Ha]:
pH = -log([H+]), and since for weak acids [H+] ~= sqrt(Ka × [Ha]), we can substitute and solve for [Ha].
Thus, [Ha] = ((10^-pH)²) / Ka = ((10⁻³)²) / 6.8×10⁻⁴ = 0.069 M. So, the concentration of hydrofluoric acid in the solution is approximately 0.069 M.
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To find the total concentration of the hydrofluoric acid, we use the dissociation constant and the pH to determine the hydronium ion concentration. We then assume ionic product equals hydronium ion concentration. This allows us to calculate the initial concentration of the hydrofluoric acid as approximately 3.16 M.
Explanation:
The question deals with hydrofluoric acid (HF) whose dissociation constant, Ka is given to be 6.8 x 10^-4. The pH of the solution is given to be 3.67. First, we need to find the concentration of hydronium ions: [H3O+] from the given pH using the relationship pH = -log[H3O+], which gives us [H3O+] = 10^-3.67 = 2.15 x 10^-4 M.
Next, we use the formula for the dissociation constant Ka of an acid, which is [H3O+][F-]/[HF]. Here [H3O+] = 2.15 x 10^-4 and [F-] = x, where x is the concentration of the anion produced. [HF] is the initial concentration of HF which we are trying to find. By assuming that x is much smaller than [HF] and hence can be neglected in the denominator, we set [H3O+] = [F-] = x = 2.15 x 10^-4. Rearranging the equation, we find that [HF] = Ka/x = (6.8 x 10^-4) / (2.15 x 10^-4) = 3.16 M.
Thus, the total concentration of hydrofluoric acid in the solution is approximately 3.16 M.
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2CH4 + 4O2 → CO2 + 4H2O Which statement is true regarding the chemical equation? A) The equation is balanced. B) The 4 in front of the oxygen on the product side needs to be a 6 in order to be balanced. C) The 2 in front of methane, CH4, needs to be changed to a 3 in order to be balanced. D) The carbon dioxide on the product side needs a 2 in front of it in order for it to be balanced.
Answer: The correct answer is Option D.
Explanation:
A balanced equation follows Law of conservation of mass. This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another. In a chemical reaction, mass is always conserved.
This also states that the total number of individual atoms on the reactants side must be equal to the total number of individual atoms on the product side.
For the given chemical reaction:
[tex]2CH_4+4O_2\rightarrow CO_2+4H_2O[/tex]
On the reactant side:
Number of Carbon atoms = 2
Number of Hydrogen atoms = 8
Number of Oxygen atoms = 8
On the product side:
Number of Carbon atoms = 1
Number of Hydrogen atoms = 8
Number of Oxygen atoms = 4
In order to balance the number of atoms, 2 must be added infront of [tex]CO_2[/tex] molecule, in order to balance the equation.
Hence, the correct answer is Option D.
a 1 molal solution of MgCl2 has a higher boiling point than a 1 molal solution of?
1)FeCl2
2)CaCl2
3)BaCl2
4)NaCl
A 1 molal solution of NaCl would have a lower boiling point elevation than a 1 molal solution of MgCl₂, because NaCl dissociates into fewer ions than MgCl₂, resulting in a lower can't Hoff factor.
The question asks which 1 molal solution has a higher boiling point compared to a 1 molal solution of MgCl₂. The boiling point elevation of a solution is affected by the number of solute particles in the solution, which is related to the can't Hoff factor (i), the measure of ion dissociation of a solute. Since MgCl₂, FeCl₂, CaCl₂, and BaCl₂ all dissociate into three ions (1 cation and 2 anions) when dissolved in water, their boiling point elevation would be expected to be similar given equai molal solutions. However, NaCl dissociates into two ions, thus a 1 molal solution of NaCl would have a lower boiling point elevation compared to a 1 molal solution of MgCl₂ due to lower i value.
J. j. thomson is credited with which discoveries? select all that apply. subatomic particles neutrons isotopes electrons
The oxidation numbers of nitrogen in NH4+, NO2, and NaNO3 are, respectively:
-3, +4, +5
+3, +5, +4
+3, +5, -4
-3, -4, +5
The oxidation numbers of nitrogen in NH₄⁺, NO₂, and NaNO₃ are -3, +4, and +5, as determined by balancing the charges of other atoms in the compounds.
The oxidation numbers of nitrogen in NH₄⁺, NO₂, and NaNO₃ can be calculated using some simple rules. In NH₄⁺, nitrogen must balance the charge from the four hydrogen atoms, each having an oxidation number of +1, leading to the oxidation number of nitrogen being -3. For NO₂, oxygen typically has an oxidation number of -2, with two oxygen atoms that would contribute an overall charge of -4, thus nitrogen must have an oxidation number of +4 to balance out and make the molecule neutral. Finally, in NaNO₃, with sodium having an oxidation number of +1, and three oxygen atoms giving a total of -6, nitrogen must have an oxidation number of +5 to balance the overall charge to zero due to the monatomic sodium ion.
Therefore, the respective oxidation numbers of nitrogen in NH₄⁺, NO₂, and NaNO₃ are -3, +4, and +5.
if all of the SCN- is complexed with Fe3+ to form FeNCS2+ what is the molar concentration of FeNCS2+
number of moles of SCN⁻ = 0 .001 X 3 / 1000 = 3 X 10⁻⁶ moles in the 25 ml of solution
2) SCN⁻ + Fe³⁺ ===> FeNCS²⁺
1 mole SCN⁻ produces 1 mole of FeNCS²⁺
Therefore moles of FeNCS²⁺ in 25 ml = 3 X 10⁻⁶
Molar Concentration of FeNCS²⁺ = (3 X10⁻⁶ )X 1000 / 25 = 1.2 X 10⁻⁴ Moles / liter
The molar concentration of Fe(SCN)²+ is 3.52 × 10⁻² M, assuming all SCN⁻ is complexed with Fe³+. Thus, the concentration of Fe(SCN)²+ is equal to 3.52 × 10⁻² M.
The molar concentration of Fe(SCN)²+, assume that all of the SCN⁻ is complexed with Fe³+ to form Fe(SCN)²+. The concentration of Fe(SCN)²+ after 10 s is 3.52 × 10⁻² M under conditions of excess Fe³+.
If all SCN⁻ is complexed with Fe³+, then the initial molar concentration of SCN⁻ is entirely converted to Fe(SCN)²+. Since the formation of Fe(SCN)²+ is stoichiometric, the molar concentration of SCN⁻ is equal to the molar concentration of Fe(SCN)²+ after the reaction.Therefore, the molar concentration of Fe(SCN)²+ is 3.52 × 10⁻² M. The reaction is stoichiometric, meaning the initial concentration of SCN⁻ is converted entirely to Fe(SCN)²+.
Enzymes are produced only _________________________.
a. outside the active cell
b. in the DNA of the cell
c. within an active cell
d. in another cell and transported
Answer:
c. within an active cell is the correct answer.
Explanation:
Enzymes are produced only within an active cell.
Enzymes are formed from the amino acids.
Enzymes are the proteins, that are produce within the active cell and they speed up the reaction rate that takes place inside the cells. enzymes are produced in ribosomes.
Enzymes help the cells to interact with each other and help in cell growth.
Given: 2AgNO3 + NiCl2 -> 2AgCl + Ni(NO3)2
Determine the limiting reactant when 0.847 grams of silver nitrate is reacted with 0.650 grams of nickel(II) chloride?
How much water must be added to 36.0 g of srcl2 to produce a solution that is 35.0 wt% srcl2? how much water must be added to 36.0 of to produce a solution that is 35.0 wt% ? 48.6 g 66.9 g 103 g 97.2 g?
To produce a solution that is 35.0 wt% SrCl2 with 36.0 grams of SrCl2, one would need to add 66.9 grams of water. This is because the total weight of the solution is the weight of SrCl2 plus the weight of the water needed.
Explanation:In order to determine how much water must be added to 36.0 g of SrCl2 to produce a solution that is 35.0 wt% SrCl2, we must understand that the 35% by weight represents that 35 g of SrCl2 is in 100 g of the solution. Thus, to find the total weight of the water and the SrCl2, we should set up the equation 36g (weight of SrCl2) / X g (total weight of solution) = 35%, which would give that X = 102.9 g. The total solution weight is the weight of the SrCl2 plus the weight of the water needed, so to find the weight of the water we subtract the weight of SrCl2 (36 g) from the total weight of solution (102.9 g), which gives us 66.9 g as the amount of water to be added to the SrCl2.
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What molecule is used to capture light energy? view available hint(s) what molecule is used to capture light energy? chlorophyll water carbon dioxide nadph atp?
Which choice is an example of a consumer? Question 9 options: tree fungi bee sun
What effect does polarity have on solubility of a compound in water?
"identify the part of the atom that most determines the chemical reactivity of the atom"
What volume of hydrogen gas can be produced by reacting 4.20 g of sodium in excess water at 50.0 Celsius and 106 kPa? The reaction is 2Na + 2H20 --> 2NaOH + H2.
Calculate the energy to heat the cube of silver, with a volume of 20.0 cm3 , from 15 âc to 32 âc. (assume that density of silver is 10.5 g/cm3, specific heat for silver is 0.235 j/gâc.)
The energy required to heat the silver cube from 15°C to 32°C can be calculated via the formula for heat transfer. The mass of the silver cube is calculated to be 210g using the given volume and density.
Explanation:The energy required to heat a substance is calculated using the formula q = mcΔT, where 'q' is the heat energy, 'm' is the mass, 'c' is the specific heat capacity and 'ΔT' is the change in temperature.
The volume of the silver cube is given as 20.0 cm3. The density of silver is given as 10.5 g/cm3. Therefore, you can calculate the mass of the silver cube by multiplying the volume with the density, that is m = volume x density = 20.0 cm3 x 10.5 g/cm3 = 210 g.
The specific heat capacity for silver, c, is given to be 0.235 J/g°C. The change in temperature, ΔT, is final temperature - initial temperature = 32°C - 15°C = 17°C.
Substituting the calculated and given values into the formula, we get q = (210 g)(0.235 J/g°C)(17°C) = 826.95 joules. Therefore, the energy required to heat the cube of silver from 15°C to 32°C is about 828 Joules.
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Compare two electrons with quantum number sets (4, 2, 1, +½) and (4, 1, 1, +½). Be specific about each in terms of location and properties, based on their four quantum numbers.
The quantum numbers (4, 2, 1, +½) and (4, 1, 1, +½) represent two different electrons in an atom.
The first quantum number, n, represents the principal energy level, which is 4 for both electrons.
The second quantum number, l, refers to the type of subshell, where l = 2 corresponds to the d subshell and l = 1 corresponds to the p subshell.
The third quantum number, m₁, specifies the specific orbital within the subshell. For the electron (4, 2, 1, +½), m₁ = 1, indicating a specific orbital within the d subshell. For the electron (4, 1, 1, +½), m₁ = 1, indicating a specific orbital within the p subshell.
The fourth quantum number, m², represents the spin of the electron. In both cases, it is +½, indicating a spin up orientation for both electrons.
Explanation:The quantum numbers (4, 2, 1, +½) and (4, 1, 1, +½) represent two different electrons in an atom. The first quantum number, n, represents the principal energy level, which is 4 for both electrons. The second quantum number, l, refers to the type of subshell, where l = 2 corresponds to the d subshell and l = 1 corresponds to the p subshell.
The third quantum number, m₁, specifies the specific orbital within the subshell. For the electron (4, 2, 1, +½), m₁ = 1, indicating a specific orbital within the d subshell. For the electron (4, 1, 1, +½), m₁ = 1, indicating a specific orbital within the p subshell.
The fourth quantum number, m², represents the spin of the electron. In both cases, it is +½, indicating a spin up orientation for both electrons.
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