Second order consumers are organisms that feed on primary consumers, which in turn feed on producers. If the number of second order consumers were to increase, it could have both positive and negative effects on the ecosystem.
On the positive side, an increase in the number of second order consumers could help control the population of primary consumers. This could lead to a decrease in the competition for resources among primary consumers, which could in turn help maintain a healthier population of producers.
On the negative side, an increase in the number of second order consumers could also lead to a decrease in the population of primary consumers. This could result in a decline in the population of producers, which could ultimately have a negative impact on the entire ecosystem.
Overall, the effects of an increase in the number of second order consumers would depend on various factors, including the specific ecosystem and the dynamics of the organisms within it.
A 25.0 mL sample of Ba(OH)2 solution was neutralized by 45.3 mL of 0.150 N HCl. What is the Normality of the Ba(OH)2
The normality of the Ba(OH)2 solution is 0.136 N.
In a neutralization reaction, the number of moles of acid is equal to the number of moles of base. Normality is a measure of concentration that depends on the number of reactive species in the solution. Here is how to determine the normality of Ba(OH)2 in the solution:
Step 1: Find the number of moles of HCl
Number of moles of HCl = Molarity × Volume
= 0.150 × 0.0453
= 0.00680 moles
Step 2: Find the number of moles of Ba(OH)2Ba(OH)2 + 2HCl → BaCl2 + 2H2O
We know that two moles of HCl reacts with one mole of Ba(OH)2. Therefore:
Number of moles of Ba(OH)2 = 0.00680 / 2
= 0.00340 moles
Step 3: Find the normality of Ba(OH)2
Normality = Number of moles / Volume of solution in L
= 0.00340 moles / 0.0250 L
= 0.136 N
Therefore, the normality of the Ba(OH)2 solution is 0.136 N.
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Winthrop uses two examples from the Bible to help explain his ideas in the sermon. What two examples does he use
In his sermon, John Winthrop uses two biblical examples: the concept of a "City upon a Hill" and the principle of mutual care and love. These examples serve to support and explain his ideas about the Puritan colonists' mission and the importance of unity and compassion within their community.
John Winthrop's use of biblical examples in his sermon helps to illustrate and reinforce his ideas in a concise and relatable manner. The phrase "City upon a Hill" represents the Puritan colonists' goal of creating a model society that would serve as a shining example for others to follow. This metaphor highlights their mission to establish a virtuous and righteous community, emphasizing their collective responsibility to uphold moral standards and serve as a beacon of light. The reference to the principle of mutual care and love draws from the teachings of the Apostle Paul in the New Testament. By emphasizing the unity and interdependence of the members of the community, Winthrop highlights the importance of compassion, empathy, and support among individuals. This principle promotes a sense of communal harmony and encourages the Puritans to take care of one another, recognizing that they are part of a larger body working towards a common purpose. Overall, these two biblical examples succinctly convey Winthrop's message about the Puritans' mission and the values they should uphold. They provide a moral framework and inspire the colonists to strive for righteousness, unity, and mutual care within their community.
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QUICK PLEASE HELP ME 30 POINTS RIGHT ANSERS ONLY :)
what term describe this particle model nh3, oh-, nh4+
Answer: Its a weak base
Explanation: Clicked on that and got the answer right. :)
The image that has been shown has helped us to know that the particles are weak bases. Option A
What is a weak base?
A chemical species or substance that has a restricted capacity to receive or interact with protons (H+ ions) in a solution is said to be a weak base. Weak bases only partially ionize or interact with water, in contrast to strong bases, which totally breakdown into ions in water and quickly take protons.
Compared to strong bases, weak bases have a lesser affinity for protons and fewer alkaline characteristics. They are frequently identified by the considerably lower concentration of hydroxide ions (OH-) in a solution and their imperfect dissociation equilibrium.
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The atomic number is equal to the number of:
protons
electrons
neutrons
protons and neutrons
A sample of 4.0 mol of neon gas at a pressure of 2.5 atm is injected into a container at
25°C. What is the volume of the container?
Answer:
The volume of container is 39.14 L.
Explanation:
Given data:
Number of moles of neon = 4.0 mol
Pressure of gas = 2.5 atm
Temperature of gas = 25°C
Volume of container = ?
Solution:
we will use general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
25+273 = 298 K
Now we will put the values in formula.
2.5 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K × 298 K
V = 97.86 atm.L /2.5 atm
V = 39.14 L
The volume of container is 39.14 L.
The addition of solute particles into a solution causes:
A. the solvent particles to be attracted to the solute particles and to have less kinetic energy.
B. the solute particles to bump the solvent particles out of the solution, making it easier to boil.
C. the solute particles to form seed crystals and make the solution freeze more easily.
D. the solvent particles to be spread further out and have more to move, increasing their kinetic energy.
Answer:
D. the solvent particles to be spread further out and have more to move, increasing their kinetic energy.
Explanation:
The addition of solute particles results in an increased boiling point. As the solutes increases so does the energy inside as the solutes add and occupies more space near the surface of the liquid.what is ammonium chloride
Answer:
Ammonium chloride (a chemical compound) is an inorganic compound with the formula NH₄Cl and a white crystalline salt that is highly soluble in water. Solutions of ammonium chloride are mildly acidic. In its naturally occurring mineralogic form, it is known as sal ammoniac.
A cube of iron at 20. Degrees C is placed in contact with a cube of copper at 60 degrees C. Which statement describes the initial flow of heat between the cubes?
Answer:
D) Heat flows from the copper cube to the iron cube.
Explanation:
These are the options for the question
A) Heat does not flow between the cubes.
B) Heat flows in both directions between the cubes
C) Heat flows from the iron cube into the copper cube.
D) Heat flows from the copper cube to the iron cube.
From the knowledge of
second law of Thermodynamicss, which says heat moved from higher temperature to lower temperature region, and termal conduction,energy such as heat will only flow from higher temperature to lower temperature, which means the heat will move from higher concentration to lower Concentration. As the cube of copper at 60 degrees is heated the atoms beginnings to vibrate as it acquire energy then moves and flow to the lower temperature part.
Therefore, Heat flows from the copper cube to the iron cube.
write differences between homogeneous mixture and heterogeneous mixture
Answer:
Homo means same
Hetero means different.
Homogeneous mixtures have one phase, it all looks the same, Fruit juice is homogeneous, solutions are homogeneous.
Heterogeneous mixtures have different phases, you can see the different parts, pepper is an example of a heterogeneous mixture.
A homogeneous mixture - Think Kool Aid (Completely Dissolved)A heterogeneous mixture - Like pepper poured into a glass of milk.In a homogeneous mixture the constituents are able to dissolve in each other due to their similar intermolecular forces, whereas in a heterogeneous mixture the constituents are not miscible- meaning they can't dissolve in each other.
To clarify: intermolecular forces describe the way that types of molecules will interact with each other. For instance, water (a polar molecule) and naphthalene (a non-polar molecule) are said to be "immiscible" because their intermolecular forces do not match. The saying goes: "like dissolves like". Meaning that molecules that have similar IFs will be mutually soluble (miscible, in other words).
Homogenous means the same all over...every cubic millimeter is about the same as every other one. Like water or soda.Heterogenous means difference in places, like salsa, with slightly different chunks of stuff depending on where you dipped your chip.A chemical _____ uses chemical symbols and subscripts to identify the number of atoms of each element in a molecule
Reactive Nonmetal
A. Cadmium
B. Titanium
C. Oxygen
D. Krypton
Which sequence represents the relationship between temperature and volume as explained by the kinetic-molecular
theory?
higher volume
->>
O higher temperature → more kinetic energy→more space between particles
O higher temperature → less kinetic energy less space between particles higher volume
O higher temperature → more kinetic energy less space between particles → lower volume
O higher temperature →less kinetic energy→more space between particles → lower volume
Mark this and return
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The sequence that represents the relationship between temperature and volume as explained by the kinetic-molecular theory is higher temperature/ more kinetic energy/ more space between particles/ higher volume
What is kinetic-molecular theory?The kinetic theory of matter can be described as the theory that stressed that all matter is made of small particles and thses particules are seen to be in random motion with some space between them.
It should be noted that the theory help us to know about matters in their differnt forms such as liquid, solid and gas and the relationshipto temperture and parameters.
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Answer:
A.
Explanation:
The speed you read from your speedometer is your ____________________. *
average speed
direction
instantaneous speed
distance
Answer:
it is your instantaneous speed
Explanation:
select all that apply select all the options that correctly describe the bond angles associated with each electron-domain geometry.
Bond angles also have an effect on the structure of molecules. Bond angles are the angles that connect adjacent lines to form bonds. The bond angle can be used to differentiate between linear, trigonal planar, tetraheral, trigonal-bipyramidal, and octahedral structures.
What is the tetrahedral geometry's electron domain angle?Thus, the molecular structure is bent at an angle just shy of 109.5° and the electron-pair geometry is tetrahedral.
Which five domains are there?The first four domains—Nutrition, Environment, Health, and Behavior—all contribute to our understanding of the animal's diverse experiences, which comprise the fifth domain, the Mental Domain.
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question:-
Select all that apply select all the options that correctly describe the bond angles associated with each electron-domain geometry?
a: The trigonal bipyramidal system has two different bond angles.
b: A species with 3 electron domains will exhibit an ideal bond angle of 120o.
c: A bond angle of 180o is observed for a linear system.
the area where it's most likely that electrons will be detected (bonding and nonbonding). One portion of an electrons domain is represented by a lone pair, singles, doubles, and triple bond.
How many domains of electrons are there?Two categories of electron domains exist: 1) A bound atom, and 2) an electron pair that is not ponding. All bonded atoms count as one electrons domain on the center atom, regardless of whether they are connected by a single, double, or triple bond. There are five fundamental geometries for electron domains.
What is the shape of an electron domain?Geometries of the electron domain. The five shapes that molecules can have in their electron domain geometries are linear, tetrahedral, triangular planar, triangular bipyramidal, and octahedral. Both the geometries and the forms of molecules exhibit many exceptions. They could be twisted, T-shaped, square planar, etc.
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whats the volume of dry hydrogen gas at standard astrospheric pressure
The volume of dry hydrogen gas at standard atmospheric pressure (which is typically defined as 1 atm or 101.325 kPa) depends on the number of moles of hydrogen gas present. The ideal gas law, PV = nRT, relates the pressure (P), volume (V), number of moles (n), and temperature (T) of an ideal gas. Assuming standard temperature and pressure (0°C and 1 atm), one mole of any ideal gas occupies a volume of 22.4 L. Therefore, to find the volume of dry hydrogen gas at standard atmospheric pressure, we need to know how many moles of hydrogen gas we have.
For example, if we have 1 mole of dry hydrogen gas at standard atmospheric pressure, the volume would be 22.4 L. If we have 0.5 moles of dry hydrogen gas, the volume would be 11.2 L. And so on.
hc and co are high and co2 and o2 are low. this could be caused by a
HC and CO are high and CO₂ and O₂ are low. This could be caused by a rich mixture.
A) rich mixture
If HC (hydrocarbons) and CO (carbon monoxide) levels are high, while CO₂ (carbon dioxide) and O₂ (oxygen) levels are low, it suggests a condition known as a "rich mixture" in the combustion process. A rich mixture refers to an air-fuel mixture in which there is an excess of fuel compared to the amount of air required for complete combustion.
When the fuel-air mixture is rich, it means that there is more fuel available relative to the available oxygen for combustion. This imbalance can occur due to several reasons, such as:
1. Incorrect fuel-to-air ratio: The air-fuel mixture may be adjusted incorrectly, with too much fuel being supplied relative to the amount of air. This can occur due to a malfunctioning fuel injection system.
2. Malfunctioning sensors: The sensors responsible for measuring the oxygen and fuel levels in the exhaust gases, such as the oxygen sensor or air-fuel ratio sensor, may be faulty or contaminated. This can result in inaccurate readings and improper adjustment of the fuel mixture.
3. Clogged air intake or fuel injectors: If the air intake or fuel injectors are clogged, it can disrupt the proper mixing of fuel and air, leading to a rich mixture.
The consequences of a rich mixture include:
High HC levels: A rich mixture results in incomplete combustion, leading to unburned hydrocarbon molecules being released into the exhaust gases. This increases the HC levels.
High CO levels: In a rich mixture, there is an excess of fuel. As a result, some of the fuel does not undergo complete combustion and is converted into carbon monoxide (CO). This leads to elevated CO levels.
Low CO₂ levels: Since there is incomplete combustion in a rich mixture, the amount of carbon dioxide (CO₂) produced is reduced.
Low O₂ levels: A rich mixture consumes most of the available oxygen for combustion, resulting in lower levels of oxygen (O₂) in the exhaust gases.
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The complete question is:
HC and CO are high and CO₂ and O₂ are low. This could be caused by a ____?
A) rich mixture
B) lean mixture
C) defective ignition component
D) clogged EGR passage
If we project the relation r of problem 3 onto s(a, c, e), what nontrivial fd’s and mvd’s hold in s?
To determine the nontrivial FD's and nontrivial MVD's in s(a, c, e) upon projecting relation r of problem 3 onto it, the main answer will be as follows:
Given: Relation r of problem 3:(a, b, c, d, e, f)ABCD → EFDE → AFD → C Nontrivial FD's and MVD's in s:(a, c, e)
Let's consider the projections of each of the FD's and MVD's present in the relation r of problem 3 onto the relation s(a, c, e).FD: A → E
Upon projecting FD A → E of relation r onto s(a, c, e), we get the following FD in s:(a) → (e)FD: E → A
Upon projecting FD E → A of relation r onto s(a, c, e), we get the following FD in s:(e) → (a)FD: C → Null
Upon projecting FD C → Null of relation r onto s(a, c, e), we get the following FD in s:(c) → NullMVD: AB → CDMVD AB → CD of relation r can be represented as follows:AB → C and AB → D
Upon projecting this MVD of relation r onto s(a, c, e), we get the following MVD in s:(a, b) → c and (a, b) → d
Thus, the nontrivial FD's and MVD's that hold in s(a, c, e) upon projecting relation r of problem 3 onto it are:(a) → (e)(e) → (a)(c) → Null(a, b) → c and (a, b) → d.
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PLEASE ITS FOR A TEST THAT I NEED TO TURN IN REALLY FAST PLEASEEEEEEEEEE
Answer:
distance and time
Answer:
d. Distance and time
Explanation:
Why was the American Federation of
Labor a different type of labor union
(compared to the Knights of Labor)
and why did it grow during the 20th
century?
what can you conclude about the % crude yield (especially if your % crude yield is greater than 100% or
In cases where the % crude yield is near or at 100%, it suggests that the purification process was efficient.
It is important to note that a % crude yield greater than 100% is not possible as it would imply that more product was produced than the starting material. In cases where the % crude yield is near or at 100%, it suggests that the purification process was efficient. A yield lower than 100% indicates that some material was lost during the process. It is essential to identify the reasons for the low yield, such as incomplete reaction or poor isolation. It is also important to note that yield calculations should be done with accuracy and precision to obtain reliable results. A yield greater than 100% is not practically possible and suggests errors in calculations or experimental procedures. Common causes include impurities in reactants or products, inaccurate measurements, or incomplete separation of the product from the reaction mixture. To resolve this issue, it is essential to double-check the calculations, ensure accurate measurements, and maintain proper experimental techniques to obtain a more accurate percentage yield.
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Calculate the amount of heat (in kJ) that must be absorbed to convert 108 g of ice at 0oC to water at 70oC.
"The amount of heat that must be absorbed to convert 108 g of ice at 0°C to water at 70°C is approximately 68.12 kJ."
To calculate the amount of heat required to convert ice at 0°C to water at 70°C, we need to consider two steps:
Heat required to raise the temperature of ice from 0°C to its melting point (0°C).
Heat required to melt the ice at its melting point (0°C) and raise the temperature of water from 0°C to 70°C.
Let's calculate the heat for each step:
Step 1: Heating ice from 0°C to its melting point (0°C)
The specific heat capacity of ice is 2.09 J/g°C.
Heat = mass × specific heat capacity × change in temperature
Heat = 108 g × 2.09 J/g°C × (0°C - 0°C)
Heat = 0 kJ (No heat is absorbed as there is no change in temperature)
Step 2: Melting ice and heating water from 0°C to 70°C
The enthalpy of fusion (heat of fusion) for ice is 334 J/g, which represents the amount of heat required to melt ice at 0°C.
Heat for melting ice = mass × enthalpy of fusion
Heat for melting ice = 108 g × 334 J/g
Heat for melting ice = 36,072 J
Next, we need to calculate the heat required to raise the temperature of the water from 0°C to 70°C.
The specific heat capacity of water is 4.18 J/g°C.
Heat = mass × specific heat capacity × change in temperature
Heat = 108 g × 4.18 J/g°C × (70°C - 0°C)
Heat = 32,043.6 J = 32.04 kJ
Now, we can sum up the heat required for both steps:
Total heat = Heat for melting ice + Heat for raising water temperature
Total heat = 36,072 J + 32,043.6 J
Total heat = 68,115.6 J = 68.12 kJ
Therefore, the amount of heat that must be absorbed to convert 108 g of ice at 0°C to water at 70°C is approximately 68.12 kJ.
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What are the consequences of purposely having an excess of one of the reactants?
Answer:
When one reactant is in excess, there will always be some left over. The other reactant becomes a limiting factor and controls how much of each product is produced. While using excess reactants can help to increase percentage yields, this is at the expense of atom economy.
Explanation:
4.00g of naoh is dissolved in 1.00 liter of a solution that is .50 molar in nh3 and .50 molar in nh4 1 assuming there is no change in volume and no loss of nh3 to atmosphere calculate concentration of hydroxide ion after chemical reaction has occurred
The concentration of hydroxide ions after a chemical reaction has occurred is 0.1 mol/L.
To calculate the concentration of hydroxide ion after the chemical reaction has occurred, first, consider the reaction between NH₃ and NaOH:
NH₃ + NaOH → NH₄⁺ + OH⁻
4.00g of NaOH is equivalent to (4.00 g / 40.00 g/mol) = 0.1 mol. Since the volume of the solution is 1.00 L, the initial concentration of NaOH is 0.1 mol/L.
As the reaction proceeds, NaOH reacts with NH₃, which is present at 0.50 M. Let's assume x mol of NH₃ reacts with NaOH. Then, the change in the concentration of NH₃ and NaOH is -x and the change in the concentration of NH₄⁺ and OH⁻ is +x.
At equilibrium, the concentrations are as follows:
[NH₃] = 0.50 - x
[NaOH] = 0.1 - x
[NH₄⁺] = 0.50 + x
[OH⁻] = x
Since the reaction goes to completion, the limiting reactant will be NaOH. Thus, x = 0.1 mol/L, and the concentration of hydroxide ion after the chemical reaction has occurred is 0.1 mol/L.
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Answer question number 16. The question is in the image.
The exercises refer to hydrocarbons. Depending on the type of bond, it will be the termination of the name of the molecule.
For a single bond: End with the suffix -ane
For double bond: Ends in -ene
For triple bond: Ends in -yne
Let's look at each particular case
a) Heptene
Hept- means 7 carbons, so we have a compound with 7 carbons and one double bond. The formula will be:
\(CH_2=CH-CH_2-CH_2-CH_2-CH_2-CH_3\)c)Hexane
6 carbons with a simple bond
\(CH_3-CH_2-CH_2-CH_2-CH_2-CH_3\)d)Pentane
5 carbons with a simple bond
\(CH_3-CH_2-CH_2-CH_2-CH_3\)e)Propyne
3 carbons with a triple bond
\(CH\equiv C-CH_3\)Which of the conservationists discussed earlier in this unit is
credited with founding the Wilderness Society?
A
Bob Marshall
B John Muir
с
Rachel Carson
thing
D
Rosalie Edge
Answer: A
Explanation: Bob Marshall
The correct answer is A. The conservationist credited with founding the Wilderness Society is Bob Marshall.
Bob Marshall was an American forester, botanist, traveler, climber, writer and social activist who advocated the preservation of unspoiled wildlife.
He actively contributed to the development and adoption of environmental regulations prohibiting the construction of roads in vast federal specially protected natural areas. In 1935 he became one of the founders of the public environmental organization The Wilderness Society and its main sponsor.
Today Bob Marshall is considered one of the main initiators of the wildlife movement in the United States. Several geographic features are named after him, including the Bob Marshall Wilderness Nature Reserve in Montana and the Marshall Mountain on the Adirondack Ridge.
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Consider the following equilibrium: upper c upper o (g) plus 2 upper h subscript 2 (g) double arrow upper c upper h subscript 3 upper o upper h (g). k subscript e q equals 26. which statement about this system is true? if the equilibrium concentration of co is 3.4 × 10–1 m, and the equilibrium concentration of h2 is 6.8 × 10–1 m, the equilibrium concentration of ch3oh is
The equilibrium concentration of CH3OH will be equal to 0.089 if the equilibrium concentration of co is 3.4 × 10–1 m, and the equilibrium concentration of h2 is 6.8 × 10–1 m
What is equilibrium concentration?An equilibrium concentration is a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction
Step 1:
The balanced equation for the reaction is given below:
H2O + Cl2O <=> 2HClO
Step 2:
Data obtained from the question. This includes:
Concentration of H2O, [H2O] = 0.077 M
Concentration of Cl2O, [Cl2O] = 0.077 M
Concentration of HClO, [HClO] = 0.023 M
Equilibrium constant, K =?
Step 3:
Determination of the equilibrium constant. This is illustrated below:
The equilibrium constant for the above reaction is given below:
K = [HClO]^2 / [H2O] [Cl2O]
K = (0.023)^2 / (0.077 x 0.077)
K = 0.089
Therefore, the equilibrium constant for the above reaction is 0.089
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How do the following changes affect the value of the equilibrium constant for a gas-phase exothermic reaction: Drag the appropriate items to their respective bins. Reset Help addition of a catalyst decrease in the temperature removal of a product decrease in the volume removal of a reactant Increase equilibrium constant Decrease equilibrium constant No effect on equilibrium constant
The following changes affect the value of the equilibrium constant for a gas-phase exothermic reaction:
Addition of a catalyst- Increase equilibrium constant
Decrease in the temperature - Decrease equilibrium constant
Removal of a product- No effect on equilibrium constant
Decrease in the volume- Decrease equilibrium constant
Removal of a reactant- Decrease equilibrium constant
Define exothermic process
An exothermic process in thermodynamics is a thermodynamic process or reaction that releases energy from the system to its surroundings, typically in the form of heat but occasionally in the form of light (such as a spark, flame, or flash), electricity (such as from a battery), or sound (such as the explosion produced by the burning of hydrogen).
The relationship between a reaction's products and reactants with regard to a certain unit is expressed by the equilibrium constant, K. The equilibrium constant is temperature-dependent and unaffected by the precise ratios of reactants to products, the presence of a catalyst, or the presence of inert substances. Additionally, it is unaffected by the volumes, pressures, and concentrations of the reactants and products.
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A container full of water absorbs 64.4 kJ of heat and its temperature rises from 22.0 °C to
73.4 °C. What is the volume of water in mL? (The density of water is 1 g/mL)
The volume of water in the container is 292.2 mL.
What happens to the water's temperature when it absorbs heat?The molecules in water must be able to move more quickly in order for the temperature to rise, and in order to do this, the hydrogen bonds that bind them must be severed. These intermolecular interactions must be broken by the heat that water absorbs. Before the temperature of the water can rise.
We can used the formula:
Q = m * c * ΔT
Q = amount of heat absorbed by the water
m = mass of water
c = specific heat capacity of water
ΔT = change in temperature of the water
Given;
Q = 64.4 kJ
ΔT = (73.4 - 22.0) °C = 51.4 °C
c = 4.18 J/(g·°C)
Converting the units of Q to Joules:
Q = 64.4 kJ * 1000 J/kJ = 64400 J
Now:
m = Q / (c * ΔT)
m = 64400 J / (4.18 J/(g·°C) * 51.4 °C)
m = 292.2 g
The density of water:
Density = mass / volume
volume = mass / density
volume = 292.2 g / 1 g/mL = 292.2 mL
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What type of reaction is: ammonium nitrate -> dinitrogen monoxide + water?
Answer:
The thermal decomposition of ammonium nitrate to produce dinitrogen monoxide and water. This reaction takes place at a temperature of 200-260°C.
6. For 2NH3 equilibrium N₂ + 3H2, Kb is 6 × 104 then Kb is a.1.12 × 10^3 b. 1.67 * 10^5 1.51 × 10^-3 d. 1.67 x 10^-5
Answer:
Explanation:
The equilibrium constant (K) for the reaction 2NH3 equilibrium N₂ + 3H2 is given as 6 × 104. This value indicates the relative concentrations of the reactants and products at equilibrium.
To determine the correct option among the choices given (a, b, c, or d), we need to know the concentration units of the equilibrium constant. Without this information, it is not possible to determine which of the given options is correct.
The equilibrium constant is usually expressed in terms of the concentration of the reactants and products in the reaction. For example, if the concentration units for the equilibrium constant are mol/L, then the correct option could be one of the following:
a. 1.12 × 10^3: This option has the correct units (mol/L) but the value is incorrect.
b. 1.67 * 10^5: This option has the correct units (mol/L) but the value is incorrect.
c. 1.51 × 10^-3: This option has the correct units (mol/L) but the value is incorrect.
d. 1.67 x 10^-5: This option has the correct units (mol/L) but the value is incorrect.
Without more information about the concentration units of the equilibrium constant, it is not possible to determine which of the given options is correct.
In the lab, Amanda has two solutions that contain alcohol and is mixing them with each other. She uses twice as much Solution A as Solution B. Solution A is 11% alcohol and Solution B is 18% alcohol. How many milliliters of Solution B does she use, if the resulting mixture has 320 milliliters of pure alcohol?
Answer:
1,103.47 milliliters
Explanation:
The total percentage of alcohol from solution A and solution B is 29. In a solution that is a mixture of solution A and B, the percentage of alcohol that would be contributed by solution A would be:--
11/29 x 100% = 37.93%
--while the percentage of alcohol that would be contributed by solution B would be:
18/29 x 100 = 62.07%
Hence, if a mixture of A and B has 320 milliliters of alcohol, the amount of alcohol contributed by B would be:
320 x 62.07/100 = 198.624 milliliters
Now, remember that solution B is 18% alcohol. This means that the 18% alcohol content of solution B is 198.624 milliliters. Thus, the total volume of solution B would be:
198.624 x 100/18 = 1,103.47 milliliters.
Therefore, the total milliliters of solution B Amanda used would be 1,103.47.