The relationship between the providers and the customer, where the providers keep the promises made to the customer, is also known as a service-level agreement.
A service-level agreement (SLA) outlines the degree of service that a client expects from a supplier, the metrics used to measure that performance, and any penalties that may be imposed if the agreed-upon service standards are not fulfilled.
A service level agreement (SLA) is a straightforward contract between a service provider and their client (internal or external), outlining the services to be provided, the level of responsiveness to be anticipated, and the performance metrics to be used.
A Service Level Agreement (SLA) has been adopted by the Information Technology Department to direct its project management. Our SLA's objectives are. to enhance management effectiveness
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What was the first expert system developed to determine the chemical structure of molecules?
Dendral was the first expert system developed to determine the chemical structure of molecules.
A molecule refers to a set of (2) or more atoms that are chemically bonded collectively, which allows you to form the smallest essential unit of a chemical compound. additionally, molecules are capable of taking elements in a chemical reaction.
A molecule is the smallest particle of a substance that has all of the physical and chemical houses. Molecules are made up of one or extra atoms. A molecule is a hard and speedy of or greater atoms held together via the use of a way of appealing forces called chemical bonds.
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________ are weak bonds that are not strong enough to hold atoms together to form molecules but are strong enough to form bonds within and around large molecules.
Hydrogen bonds are weak bonds that are not strong enough to hold atoms together to form molecules but are strong enough to form bonds within and around large molecules.
The hydrogen bond is weak bond.The hydrogen bond is electrostatic force of attraction between hydrogen atom and more electronegative atoms or group ( like Florine , oxygen or nitrogen) which is contently bonded.The hydrogen bond is occur in polar , contently bond atoms in different molecules.Example is H-O-H or [tex]NH_{3}[/tex]The positively charged hydrogen side of one water molecule is bond with negatively charged oxygen side of another molecule.learn about Hydrogen bond
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What are the correct half reactions for the following reaction:
Zn + 2 HCI -> H₂ +zncl2
Answer:
Zn(s) + 2H+(aq) => Zn²+(aq) + H2 (g)
Explanation:
The equation Zn + 2 HCI -> H₂ +zncl2 on reduction and oxidation, it results as below;
2H+ + 2e- => H2 ; reductionZn => Zn²+ + 2e- ; oxidationThe equations above are half cell.
On combination of the above half cell reaction equations gives;
Zn(s) + 2H+(aq) => Zn²+(aq) + H2 (g).
Therefore, the half reaction equation for Zn + 2 HCI -> H₂ +zncl2 is given by;
Zn(s) + 2H+(aq) => Zn²+(aq) + H2 (g).
Ammonia, NH3, undergoes reaction with oxygen to form nitrogen and water. When 7.00 x 1022 molecules of ammonia react with 6.00 x 1022 molecules of oxygen, what mass of nitrogen results (grams)
Amount of nitrogen produced = 1.624 g
To calculate the moles, we use the equation:
4NH3(g) + 3 O2 (g) ---> 2 N2 (g) + 6 H2O (g) ....(1)
For ammonia:
Putting values in above equation, we get:
Moles of ammonia = 7.00 x 1022 / 6.023 * 10 ^23 = 0.116 mol
Moles of oxygen = 6.00 x 1022 / 6.023 * 10 ^23 = 0.099 mol
For the reaction:
4NH3(g) + 3 O2 (g) ---> 2 N2 (g) + 6 H2O (g)
By Stoichiometry of the reaction,
4 moles of ammonia combine with 3 moles of Oxygen
Thus 0.116 moles of ammonia will combine with= 3/4 * 0.116 = 0.087 of oxygen
Thus ammonia is the limiting reagent as it limits the formation of product.
4 moles of ammonia produces 2 moles of nitrogen
0.132 moles of ammonia will produce=2/4 * 0.116 = 0.058 of nitrogen
Molar mass of nitrogen = 28 g/mol
Amount of nitrogen produced=
No of moles * molar mass = 0.058 * 282 = 1.624 g
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chemical engineer has determined by measurements that there are moles of nickel in a sample of nickel tetracarbonyl. How many moles of oxygen are in the sample
A chemical engineer has determined by measurements that there are 7.0 moles of carbon in a sample of nickel tetracarbonyl. 7 moles of oxygen are in the sample.
What is Stoichiometry ?Stoichiometry helps us use the balanced chemical equation to measure quantitative relationships and it is to calculate the amounts of products and reactants that are given in a reaction.
What is Balanced Chemical Equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
According to Stoichiometry
[tex]7\ \text{mol C} \times \frac{1\ \text{mol O}}{1\ \text{mol C}}[/tex]
= 7 mol O
Thus from the above conclusion we can say that A chemical engineer has determined by measurements that there are 7.0 moles of carbon in a sample of nickel tetracarbonyl. 7 moles of oxygen are in the sample.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: This is the chemical formula for Nickel Tetracarbonyl (a powerfully poisonous liquid used in Nickel Refining).
Ni(CO)₄
A chemical engineer has determined by measurements that there are 7.0 moles of carbon in a sample of nickel tetracarbonyl. How many moles of oxygen are in the sample ?
Noble gases have __ values of ionization energy due to their complete outermost shells
Answer:
high
Explanation:
The energy needed to ionize a neutral atom is known as ionization energy. An atom must have one or more electrons removed from its valence shell in order to get ionized and become a cation. Alternately, you must produce an anion by adding one or more electrons to the valence shell. The energy needed for ionization will be lower the fewer electrons are supplied or withdrawn. As a result, atoms having an incomplete valence shell have a tendency to ionize more quickly and with less energy. However, entire valence shell atoms will require a large amount of ionization energy. As a result, noble gases need significant energy to ionize since they contain a full valence shell, are extremely stable, and do not tend to ionize easily.
What is the wavelength of a photon if the energy is 7.69 × 10⁻¹⁹ j? (h = 6.626 × 10⁻³⁴ j • s)
The wavelength of a photon if the energy is 7.69 × 10⁻¹⁹ J is
Calculation,
Given energy = 7.69 × 10⁻¹⁹ J
Plank's constant = 6.626 × 10⁻³⁴ J.s
Formula used:
E = hv
E is the energyh is plank's constantv s frequencyv = c/ lemda
Where, c = speed of light =
lamda = wavelength of the photon
Putting the value of v in equation (i), and rearrange the equation.
E = hc/lemda = 6.626 × 10⁻³⁴ J×3[tex]10^{8}[/tex]/lemda = 7.69 × 10⁻¹⁹ J.s
lamda = 6.626 × 10⁻³⁴J×3[tex]10^{8}[/tex] m[tex]s^{-1}[/tex]/7.69 × 10⁻¹⁹J.s = 2.58× [tex]10^{-9}[/tex]m =2.58 nm
So, wavelength of a photon is 2.58 nm
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Life alters the atmosphere by producing and removing _____________________, carbon dioxide, and methane.
Life alters the atmosphere by producing and removing oxygen, carbon dioxide, and methane.
Burning fossil fuels like coal, and natural gas, including oil, solid waste, trees, and other biological materials release carbon dioxide into the atmosphere, along with some chemical reactions.
It is thought that the first billion years of Earth's history saw a lot of volcanic activity. With little to no oxygen, the early atmosphere was presumably primarily composed of carbon dioxide.
Therefore, life alters the atmosphere by producing and removing oxygen, carbon dioxide, and methane.
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What is the temperature change the H2O sample
Answer:
5.0 °C
Explanation:
To find the temperature change, you need to use the following equation:
Q = mcΔT
In this equation,
-----> Q = heat energy (J)
-----> m = mass (g)
-----> c = specific heat capacity (J/g°C)
-----> ΔT = temperature change (°C)
You can find the temperature change by plugging the given values into the equation and simplifying.
Q = 209 J c = 4.18 J/g°C
m = 10.0 g ΔT = ? °C
Q = mcΔT <----- Equation
209 J = (10.0 g)(4.18 J/g°C)ΔT <----- Insert values
209 J = (41.8)ΔT <----- Multiply 10.0 and 4.18
5.0 = ΔT <----- Divide both sides by 41.8
Answer:
5° C temp change
Explanation:
Q = m c T
Given: Q =209 m = 10 c = 4.18 looking for T (change in temp)
209 = 10 * 4.18 T
T = 209 / (10*4.18) = 5° C
The function of the heat exchanger in a nuclear reactor is to...
Select one:
a. prevent the leakage of radiation into the environment.
b. convert water into steam, which turns a turbine.
c. cool the reactor water.
d. absorb neutrons to slow down the chain reaction.
Answer:
cool the tractor water system
Receiving an electrical shock when you forget to turn off the power before working on an electrical socket is an example of a negative punishment. please select the best answer from the choices provided t f
Answer:
TRUE
Explanation
Negative punishment's or reinforcement .
Negative reinforcement comes as a result of failing to take the necessary precautional measures , whether intentional or unintentional .
Forgetting is a natural circumstance hence if one forgets it means in the first place he has by passed the protocols anyway and he has to take the consequences .
Sometimes it may be ignorance since it is in common knowledge to turn off any machine and if possible you should unplug it from the power supply to avoid any shocks which may even be fatal if the source of power does not have mechanisms to control such situations i.e. shocks and power surges .
Psychological when one gets such a punishments he will always remember the ordeal since it inflicted pain on him and he will always take precautional measures before handling an electronic or power sources .
Answer:false
Explanation:
3 A+B 2C+D
What is the percent yield of the reaction if 7.00 mol of A actually formed 1.00 mol of
C?
Answer:
Percent Yield = 21.4% C
Explanation:
The actual yield is the value that was produced after conducting an experiment. The theoretical yield is the value calculated using the balanced chemical equation.
To find the percent yield, you need to (1) convert moles A to moles C (via the mole-to-mole ratio from equation coefficients) and then (2) calculate the percent yield. It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the values given.
3 A + B -----> 2 C + D
^ ^
7.00 moles A 2 moles C
--------------------- x ---------------------- = 4.67 moles C
3 moles A
Actual Yield
Percent Yield = ------------------------------ x 100%
Theoretical Yield
1.00 moles C
Percent Yield = ------------------------- x 100%
4.67 moles C
Percent Yield = 21.4% C
A student started with 0.3295 g of copper. The mass of filter paper and copper (II) oxide product was found to be 0.5723 g, and that of the filter paper alone was 0.2568 g. Calculate the percent yield of copper (II) oxide.
The percent yield will be 95.75%
Percent yieldMass of copper = 0.3295 g
Mass of filter paper + copper (II) oxide = 0.5723
Mass of filter paper only = 0.2568
Mass of copper (II) oxide = 0.5723 - 0.2568 = 0.3155
Percent yield = yield/total x 100%
= 0.3155/0.3295 x 100% = 95.75%
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If the reaction has reached equilibrium and then the sealed reaction vessel expands, increasing the volume, the reaction would ____.
If the reaction has reached equilibrium and then the sealed reaction vessel expands, increasing the volume, the reaction would increase.
The equilibrium will change to favor the direction that produces more moles of gas when the volume is increased.
Equilibrium is a state of balance between opposing forces or actions that can be static (such as when forces are applied to a body and the resultant is zero) or dynamic (such as during a reversible chemical reaction when the velocities in both directions are equal). It can also be a state of equilibrium between the mind and the body.
In terms of economics, equilibrium occurs when supply and demand are equal. When you are composed and steady, you are in an equilibrium state.
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Silver bromide is the photosensitive material in 35 mm photographic film. When monochromatic light falls on film, the photons are recorded if
they contain sufficient energy to react with silver bromide in the film. The minimum energy needed to do this is approximately 57.9 kJ/mol. What
is the wavelength of this energy in nm?
The minimum energy needed by the photons to react with silver bromide in the film is approximately 57.9 kJ/mol. Then, the wavelength is 206 nm.
What is wavelength?Wavelength of a wave is the distance between two consecutive crests or troughs of the wave.
To find the wavelength of the energy in nm, we can use the equation:
E = hc/λ
where E is the energy in joules, h is Planck's constant (6.626 x 10⁻³⁴ J s), c is the speed of light (2.998 x 10⁸ m/s), and λ is the wavelength in meters.
First, we need to convert the energy from kJ/mol to J/photon:
57.9 kJ/mol = 57.9 x 1000 J/mol / 6.02 x 10²³ mol^-1
= 9.626 x 10²⁰ J/photon
Now we can use the equation above to find the wavelength:
9.626 x 10²⁰ J/photon = (6.626 x 10⁻³⁴ J s)(2.998 x 10⁸ m/s) / λ
Solving for λ, we get:
λ = hc/E = (6.626 x 10⁻³⁴ J s)(2.998 x 10^8 m/s) / 9.626 x 10⁻²⁰J/photon
= 2.06 x 10⁻⁷ m
Finally, we convert the wavelength from meters to nanometers:
λ = 2.06 x 10⁻⁷ m x (10⁻⁹ nm/m)
= 206 nm
Therefore, the wavelength of the energy needed to react with silver bromide in 35 mm photographic film is approximately 206 nm.
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What best defines an extensive property of a substance? (4 points) A property that is observable A property that is measurable A physical property that depends on the sample size A physical property that is not dependent on sample size
Answer:
A physical property that depends on the sample size
Explanation:
Given an end diastolic volume (EDV) of 120 ml / beat and an end systolic volume (ESV) of 50 ml / beat, the stroke volume (SV) would be ________.
70 ml would be the stroke volume (SV) every beat.
Given,
End Diastolic Volume(EDV) = 120 ml/beat
End Systolic Volume(ESV) = 50 ml/beat
According to the formula
Stroke volume = End Diastolic Volume(EDV) - End Systolic Volume(ESV)
Stoke volume = 120 ml/beat - 50 ml/beat
Stroke volume = 70 ml/beat
The amount of blood in the ventricles just before the heart contracts is known as end-diastolic volume.
End-systolic volume (ESV) is the amount of blood in a ventricle at the point where systole, or contraction, ends and diastole, or filling, begins.
At any time during the cardiac cycle, the ESV has the lowest blood volume in the ventricle.
The amount of blood that is pumped out of the left ventricle of the heart with each systolic cardiac contraction is referred to as the stroke volume.
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Which rule for assigning oxidation numbers is correct?
Hydrogen is usually –1.
Oxygen is usually –2.
A pure group 1 element is +1.
A monatomic ion is 0.
The incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.
Hydrogen is usually +1
What is oxidation number?Oxidation numbers can be defined as that number which is assigned to an element in chemical reaction which represents the number of electrons lost or gained.
So therefore, the incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.
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Answer:
B: Oxygen is usually –2.
Explanation:
By replacing hardware safety features with software controls in the therac-25 machine, aecl was able to?
Therac-25, AECL was able to reduce costs by replacing hardware safety features with software controls.
the Therac-25 was a laptop-controlled radiation therapy machine produced by Atomic energy state Canada limited in 1982 after the Therac-6 and Therac-20 units. It was involved in at least six accidents between 1985 and 1987, in which patients were given massive overdoses state radiation.
The Therac-25 machine was a state-of-the-art linear accelerator developed by using the company Atomic strength Canada restricted (AECL) and a French company CGR to provide radiation treatment to cancer sufferers. The Therac-25 become the most computerized and complicated radiation therapy device state its time.
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Control rods in a nuclear reactor...
Select one:
a. remove heat from the reactor core.
b. provide fuel for the reaction.
c. control a chain reaction by absorbing neutrons.
d. prevent the leakage of radiation into the environment.
Control rods in a nuclear reactor control a chain reaction by absorbing neutrons. Option C
What are control rods?The control rods are rods that are inserted into the nuclear reactor in order to absorb the neutrons thereby preventing the nuclear reaction from going out of hand.
Hence, control rods in a nuclear reactor control a chain reaction by absorbing neutrons. Option C
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age
Which of the following has the greatest mass?
Select one:
1.0 mole of Zn
1.0 mole of Cu
1.0 mole of Fe
they all have the same mass
Answer:
Option (2)
Explanation:
Since the amount of each sample is the same, we are looking for the metal with the greatest density, which is copper.
Carbon has six protons; therefore, its mass number is six.
a. true
b. false
Answer:
B.) False
Explanation:
The mass number is determined by adding the number of protons and neutrons in an element's nucleus. Since carbon has 6 protons and 6 neutrons, the mass number is 12.
The atomic number is determined by the number of protons in an element's nucleus. Since carbon has 6 protons, the atomic number is 6.
It takes 38. 6 kj of energy to vaporize 1. 00 mol of ethanol (mw: 46. 07 g/mol). What will be δssys for the vaporization of 11. 0 g of ethanol at 78. 4 °c?
Answer:
9.21 kJ is the enrgy required to vaporize 11.0 grams of ethanol.
Explanation:
Energy of vaporization can be stated as 38.6 kj/mole for ethanol. ["It takes 38. 6 kj of energy to vaporize 1. 00 mol of ethanol"]
11.0 grams of ethanol is not 1 mole. Calculate the moles of ethanol by dividing t=it's mass by its molar mass:
(11.0 grams)/(46.07 g/mole) = 0.2388 moles ethanol
(0.2388 moles ethanol)*(38.6 kj/mole) = 9.21 kJ is the enrgy required to vaporize 11.0 grams of ethanol.
A positive correlation ______ a causal link, and a negative correlation ______ a causal link.
A. does not necessarily indicate, does not necessarily indicate
B. does not necessarily indicate, always indicates
C. always indicates, does not necessarily indicate
D. always indicates, always indicates
A positive correlation does not necessarily indicate a causal link, and a negative correlation does not necessarily indicate a causal link; option A.
What is a correlation?A correlation is a relationship that exists between two variables.
A positive correlation indicates a direct relationship while a negative correlation shows an inverse relationship.
However, a positive correlation does not necessarily indicate a causal link, and a negative correlation does not necessarily indicate a causal link.
In conclusion, a correlation indicates a relationship between two values.
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A sample of an unknown substance has a mass of 0. 465 kg. If 3,000. 0 j of heat is required to heat the substance from 50. 0°c to 100. 0°c, what is the specific heat of the substance? use q equals m c subscript p delta t.
Answer:
.129 J / g-C
Explanation:
specific heat = J / g-°C
= 3000 J / ( 465 g * 50C ) =.129 J /g-C
The group of students then did an experiment using four different solutes to see which one would be best in their hot pack. To determine which solute would be best, the students mixed 20 g of each solute into separate containers that each held 50 mL of 24°C water. The students then recorded the temperature changes in each container. The data table below shows the maximum and minimum temperature they obtained for each solute, as well as the temperature difference.
Based on the value of temperature increase, the best solute to be used in the hot pack is calcium chloride.
What are exothermic reactions?Exothermic reactions are reactions in which heat is liberated or given by the substances reacting.
The reaction in hot packs are exothermic reactions.
Based on the increase in temperature observed when 20 g of each solute is mixed into separate containers that each held 50 mL of 24°C water, the best solute to be used in the hot pack is calcium chloride.
In conclusion, exothermic reactions give off heat.
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The population that experienced the highest radioactivity from chernobyl in norway were:______
The population that experienced the highest radioactivity from chernobyl in norway were "a small community of reindeer herders called the Saami".
Typically, the term "population" denotes the total quantity of people living in a particular area, be it a city or town, region, country, continent, or even the entire world.
The native reindeer herders of Scandinavia could be known as the Sámi. These breathtaking images capture a herd during its yearly journey through summer pastures as well as wintering areas.
Therefore, the population that experienced the highest radioactivity from chernobyl in norway were "a small community of reindeer herders called the Saami".
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In your reaction you started with a solution that was approximately 8 M acetic acid and 4 M isopentyl alcohol. Use the equilibrium expression for this reaction to calculate the final concentrations of water, isopentyl acetate, isopentyl alcohol, and acetic acid (you'll need to use the quadratic equation to solve this expression) assuming that the equilibrium constant is 4.2. Calculate the percent yield of isopentyl acetate to which this value would correspond.
The final concentrations of water, isopentyl acetate, isopentyl alcohol, and acetic acid obtained on using equilibrium expression are 3.4M, 3.4M, 0.6M , 4.6M
Using ICE table:-
Acetic acid + Isopentyl alcohol ------> Isopentyl acetate + water
I 8M 4M 0 0
C 8-x 4-x +x +x
E 8-x 4-x +x +x
Equilibrium constant (Keq) = 4.2
On using the equilibrium expression -
Keq = [Product] / [Reactant]
Keq = x^2 / (8-x) (4-x )
4.2 = x^2 / 32 - 8x - 4x + x^2
x = 3.4
Concentration of acetic acid = 8-x = 8-3.4 = 4.6M
Concentration of isopentyl alcohol = 4-x = 4-3.4 = 0.6M
Concentration of isopentyl acetate = x = 3.4M
Concentration of water = x = 3.4M
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Given the balanced equation: 2KClO3 --> 2KCl 3O2 What type of reaction is represented by this equation
The correct option is (2) decomposition.
In the balanced equation 2KClO3==> 2KCl + 3O2, as there is a reduction of oxygen therefore it is decomposition reaction.
What is decomposition reaction?A chemical reaction that results in the breakdown of one reactant into two or more reactants is known as a decomposition reaction.
The general equation for decomposition is-
AB -> A + B
Where A & B are now the product molecules and AB is the parent (reactant) molecule.
Some key features of the decomposition reaction are-
A combination reaction is the opposite of the a decomposition reaction. In such reactions, a single product is created form two or even more reactants.Decomposition processes are not always endothermic. Both endothermic and exothermic reactions can take place during decomposition. This one is more typical than the former, though.Extraction of metal from their ores is a significant use of decomposition processes. For instance, by putting calamine through a breakdown reaction, zinc can be extracted. The same process can be used to make sodium form sodium chloride (NaCl).A type of decomposition reaction known to be a double decomposition reaction involves the exchange of positive and negative ions between two constituent reactants to create two new molecules.To know more about decomposition reaction, here
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The complete question is-
Given the balanced equation:
2KClO3==> 2KCl + 3O2
Which type of reaction is represented by this equation?
(1) synthesis
(2) decomposition
(3) single replacement
(4) double replacement
A sparingly soluble metal hydroxide, m(oh)2 has a molar solubility of s mol/l at 25°c. its ksp value is:______
The value of the Ksp can be obtained in terms of s as 4s^3.
What is Ksp?The term Ksp has to do with the solubility product. It is the extent to which a substance can dissolve in water. We know that the solubility of the substance can be given as;
M(OH)2(s) ⇔M^+(aq) + 2OH^-(aq)
Ksp = s * (2s)^2
Ksp = s * 4s^2
Ksp = 4s^3
Thus it follows that the value of the Ksp can be obtained in terms of s as 4s^3.
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