The composition of a given pure compound is always the same no matter what the source of the compound.
A compound seems to be a substance that is entirely made of one kind of molecule.
Every component of compounds shares the same traits and features because of their homogenous makeup. However, because mixtures are composed of several sorts of chemicals, they frequently differ in terms of content, qualities, and samples.
Therefore, the composition of a given pure compound is always the same no matter what the source of the compound.
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How many particles would be found in 2.38g of (NH4)3PO4
Answer:
That is 2.38 divided by Moller Mosque. That is 149
Hope tht helped :)
what is the device that most famously is used to find the molecular weight of a compound?
The device that is most famously used to find the molecular weight of a compound is a mass spectrometer.
A mass spectrometer is an analytical instrument that is used to measure the mass-to-charge ratio of charged particles. It works by ionizing a sample of the compound, accelerating the ions, and then measuring their masses using a magnetic or an electric field. The resulting mass spectrum can be used to determine the molecular weight of the compound, as well as its elemental composition and isotopic distribution. Mass spectrometry is widely used in chemistry, biochemistry, and other fields to identify and quantify molecules, and it is considered one of the most accurate and precise methods for determining molecular weight.
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What material is the limiting ingredient if you have 6 eggs, 1 cup of milk, 3/4 tsp of ground cinnamon, 1 tsp of ground nutmeg, and 8 slices of bread
Answer:
Below
Explanation:
For 8 slices of bread you need
8 eggs<==== you do not have enough ( enough for 6 slices)
2 cups of milk <====== you do not have enough ( enough for 4 slices)
2 tsp of ground cinnamon <==== you do not have enough ( enough for 3)
2 tsp of ground nutmeg <===== you do not have enough (enough for 4)
SO ALL of the ingredients are limiting ingredients for the 8 slices of bread
you will run out of cinnamon first <==it is the MOST limiting
Answer: B ground cinnom
Explanation:
Draw the unique stereoisomers for 2-chloro-2,3-dimethylpentane. Show stereochemistry clearly. To ensure proper grading, explicitly draw all four groups, including wedge/dash bonds, around a chirality center. Indicate whether the compounds could exist in an optically active form.
a. Could exist in optically active form b. cannot exist in optically active form c. cannot be determined
There are two stereoisomers possible for 2-chloro-2,3-dimethylpentane with two chiral carbons. Yes, this indicates that the compounds can exist in optically active form.
Optical isomerism is most common in substances that have the same molecular and structural formula but they cannot be superimposed on one another. Stereoisomers that rotate the plane of polarized light typically exhibit optical isomerism.
Chiral carbons are those that lack a plane of symmetry and have distinct attached groups.
Achiral molecules have a plane of symmetry and all of the groups attached to the central carbon atom are the same.
Molecules with chiral centers exhibit optical isomerism and may exist in an optically active form.
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True or false? If the same reaction is carried out twice, once at high pressure and once at low pressure, the reaction at low pressure will have a shorter reaction time.
If the same reaction is carried out twice, once at high pressure and once at low pressure, the reaction at low pressure will have a shorter reaction time is referred to as a false statement.
What is Reaction time?This is referred to as the speed at which a chemical reaction takes place and is also the measure of the change in concentration of the disappearance of reactants or the change in concentration of the products.
Increase in the temperature and pressure will lead to a shorter reaction time while a decrease in the temperature and pressure will lead to a longer reaction time which is therefore why false was chosen as the correct choice.
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Answer: False.
Explanation: At higher pressures, there are more particles per unit volume. This means that they are closer together, so there will be more frequent successful collisions and a faster rate of reaction.
The difference between doing compositional stoichiometry and reaction stoichiometry problems is:
There are mass/mole ratios of elements in compounds in compositional stoichiometry questions and mass/mole ratios of compounds in balanced equations in reaction-based stoichiometry problems.
Composition stoichiometry relates to the atomic structure of a chemical compound, whereas reaction stoichiometry refers to the quantity of compounds consumed or created during a chemical reaction. This is the main distinction between composition and reaction stoichiometry.
Chemically speaking, the term "stoichiometry" refers to the quantitative information about a chemical substance or chemical reaction. When the information pertains to a chemical compound, it is referred to as composition stoichiometry; when it pertains to a chemical reaction, it is referred to as reaction stoichiometry.
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Ammonia reacts with oxygen to form nitric oxide and water vapor:
4NH3 + 5O2 → 4NO + 6H2O
What is the theoretical yield of water, in moles, when 40.0 g NH3 and 50.0 g O2 are mixed and allowed to react?
Answer:
The answer is 20.3 g.
What are the complementary strands of DNA?
Answer:
Cell division
Explanation:
the complementary strands of DNA formed during cell division
Use the Henderson-Hasselbalch equation to calculate the pH of each solution.
a. a solution that is 0.135 M in HCIO and 0.155 M in KCIO
b. a solution that contains 1.05% CH NH by mass and 1.10%
CalsNH;Br by mass
c. a solution that contains 10.0 g of HCH;O, and 10.0 g of NaCH;Oz in 150,0 mL of solution
Use the Henderson-Hasselbalch equation, The pH of the solution of (A), (B), and (C) is 7.52, 11.1828, and 4.6444 respectively.
What is Henderson-Hasselbalch equation for acidic medium?A rough equation that depicts the link between a solution's pH or pOH, pKa or pKb, and the ratio of the concentrations of the dissociated chemical species is the Henderson-Hasselbalch equation. The equation requires knowledge of the acid dissociation constant.
Calculation-:(A) pH = Pka + log [Salt]/[Acid]
Pka of HClO = 7.46
∴ pH = 7046 + log 0.155/0.135 ⇒ pH = 7.52
(B) 1.05% C2H5NH2 by mass
weight of C2H5NH2 = 1.05 gm
gram molecular weight of C2H5NH2 = wt/G Mwt × n factor
⇒ 1.05/45 × 1
⇒ 0.0233
1.10 % C2H5NH3Br by mass
weight of C2H5NH3Br = 1.10 gm
Gram molecular weight of C2H5NH3br = 127
No. of equivalent of C2H5NH3Br = 1.10/127 × 1
⇒ 0.0086
It is a basic buffer
pH = 14-{Pka + log [C2H5NH3Br}/C2H5Nh2]}
pka for C2H5NH2 = 3.25
pH = 14 - { 3.25 + log [0.0086]/0.0233}
⇒pH = 14- { 3.25 + (-0.4328)
⇒pH = 14.4328-3.25
⇒pH = 11.1828
(C) weight of HC2H3O2 (CH3COOH) = 10.0g
Equivalent weight of Hc2H3O2 = 60
Normality of HC2H3O2 = wt/GM weight × 1000/Vml
⇒ 10/60 × 1000/150
⇒ 100/90 = 1.1111 N
Weight of NaC2H3O2 (CH3COONa)= 10.0g
Equivalent weight of NaC2H3O2= 82
⇒N= 10/82 × 1000/150
⇒1000/1230 = 0.8130 N
It is a Acidic buffer
pka for CH3COOH = 4.78
pH = pka + log [NaC2H3O2]/HC2H3O2}
⇒pH = 4.78 + log (0.8130)/1.1111
⇒pH = 4.78 + log (0.7317)
⇒pH = 4.78 + (-0.1356)
⇒pH = 4.78 -0.1356
⇒pH = 4.6444
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CAN SOMEONE PLEASE HELP ME, THANK YOU!!! I NEED THE ANSWER BEFORE 1/12, TMRW
Would you need to chemically or physically change the parts in order to separate a
compound? Explain why.
Answer: Only chemically.
Explanation: A compound is a pure substance composed of two or more different atoms chemically bonded to one another. That means that it can not be separated into its constituents by mechanical or physical means and only can be destroyed by chemical means.
1s22s22p63s23p64s23d2 is the correct electron configuration for which of the following atoms?
a. Ca
b. Ti
c. Ge
d. Zr
The 1s² 2s²2p⁶ 3s² 3p⁶ 4s² 3d² is the correct electron configuration for the atoms is the b. Ti. The atomic number of the Ti is the 22.
The atomic number of the Ti is 22. The electronic configuration of the Ti is given below as :
Ti = 1s² 2s²2p⁶ 3s² 3p⁶ 4s² 3d²
The element name is the Titanium with the symbol Ti. The Titanium is the element belongs to the 3d block. The 3d elements are called as the transition elements. So, it is also called as the transition element. The valency of the Titanium is the 4.
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C,Hist O,→ CO,+ H,O
C₂H₁6+
2
On the left and right sides of the reaction arrow of a balanced equation, the same number of each sort of atom is present.
Which equation with balance is accurate?On the left and right sides of the reaction arrow of a balanced equation, the same number of each sort of atom is present. The reactants go on the left side of the arrow when writing a balanced equation, and the products go on the right side.Chemical equations describe how chemical reactions happen. Reactants are in chemical equations on the left, yields are indicated by an arrow, and products are on the right.Chemical formulas and symbols are used in chemical equations to depict a chemical reaction symbolically.On the left and right sides of the reaction arrow of a balanced equation, the same number of each sort of atom is present.To learn more about balanced equation refer to:
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There are equal numbers of each type of atom on the left and right sides of the reaction arrow in the balanced equation.
What is balanced equation?There are equal numbers of each type of atom on the left and right sides of the reaction arrow in the balanced equation. When writing an balanced equation, reactants go to the left of the arrow and products go to the right.Chemical equations describe how chemical reactions occur. In chemical formulas, reactants are on the left, yields are indicated by arrows, and products are on the right.Chemical formulas and symbols are used in chemical equations to represent chemical reactions. There are equal numbers of each type of atom on the left and right sides of the reaction arrow in the balanced equation.to learn more about balanced equation from the given link:
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Question:
What is the balanced equation of CO2 h2o -> C6H12O6 o2?
Which organism makes its own food
An organism that can manufacture food on its own utilising light, water, carbon dioxide, or other chemicals is known as an autotroph.
Explain about an autotroph?
An organism that can manufacture food on its own utilizing light, water, carbon dioxide, or other chemicals is known as an autotroph. Autotrophs are occasionally referred to as producers since they grow their own nourishment.
A living thing that does not consume other organisms but instead obtains its own nourishment from inorganic sources or the environment. A heterotroph is an organism that cannot synthesis organic compounds from inorganic material and must receive its organic food molecules by consuming the waste of other organisms.
Given that they produce their own sustenance through photosynthesis, the majority of plants are autotrophs. There are, however, exceptions to every rule. A host serves as the food source for some parasitic, non-photosynthetic plants.
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How many atoms are in 4 moles of MgCl2
Answer:
1 mole of any substance contains 6.02 x 1023 constituent particles, correct to three significant figures (avogadro constant).
Number of molecules of 4 moles of MgCl2 = 4 x 6.02 x 1023
In every molecule of MgCl2 there are 3 atoms.
Thus, number of atoms in 4 moles of MgCl2 = 3 x 4 x 6.02 x 1023 = 7.22 x 1024
I have 5mg of a powder chemical ubtance that I need to diolve in a olvent with a 2g/L olubility. I ultimately need to give two doe of the chemical: 10ug/L and 100 ug/L. Ultimately, I mut add between 5ul and 10ul to the olution. I can create up to 3 tock dilution. How can I olve thi problem? Pleae how all work o I can learn! Thank you
To solve this problem, you can use a serial dilution method to achieve the desired final concentration of the chemical substance in the solvent.
First, determine the amount of solvent you need to dissolve the 5mg of the chemical substance. Since the solubility of the chemical substance is 2g/L, you need to use 2.5L of solvent (5mg / 2g/L = 2.5L).
Next, create a stock solution by dissolving the 5mg of the chemical substance in 2.5L of solvent. This will give you a stock solution with a concentration of 2mg/L.
Then, create a series of dilutions from the stock solution to achieve the desired final concentrations of 10ug/L and 100ug/L. You can do this by taking a certain volume of the stock solution and adding an equal volume of solvent to it. This is known as a 1:1 dilution and will reduce the concentration by half.
To create a 2:3 dilution, you can take 2 parts of the stock solution and add 3 parts of solvent. By doing so, you can use the stock solution to create a series of dilutions, each with a lower concentration than the previous one, until you reach the desired final concentrations of 10ug/L and 100ug/L.
Finally, you can measure the volume of the solution needed to add to the final solution between 5ul to 10ul. It's important to keep in mind that the accuracy of this method depends on the precision of the measurements taken, especially when working with very low concentrations.
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Answer the following questions regarding metals and alloys.
a. Describe metallic bonds.
b.
Explain how the metallic bonds give metals the ability to conduct electricity.
c. Compare the strength of iron and steel. Which is stronger? How do the bonds explain the difference
in strength?
d.
Compare the ductility or iron and steel-which is more ductile? How do the bonds explain the
difference in ductility?
Answer:
A. They are malleable, ductile, and conduct electricity.
Using the phase diagram for CO2, what phase is carbon dioxide in at -40°C
Carbon dioxide is in a solid state at -40°C.
What is a phase diagram?This refers to a graph that shows the limiting conditions for the three phases (solid, liquid, and gaseous phases) of a single substance or of a mixture of substances while undergoing changes in pressure and temperature or when combined with other variables, such as solubility and temperature.
The phase diagram for CO₂ shows that at temperatures below -109.3°F (-78.5°C) and pressures below 5.1 atm, CO₂ exists as a solid (dry ice). At temperatures above -109.3°F and pressures above 5.1 atm, CO₂ is a supercritical fluid.
Hence, at -40°C, CO₂ is in a solid state.
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Calculate the mass of carbon and the mass of hydrogen in 82.0 g of propane.
Mass of the carbon is 7.44 g while the mass of the hydrogen is 0.4 g.
What is the mass of the carbon?We have to know that we can be able to obtain the masses of each of the atoms that can be found in the molecule that is called propane. You have to note that propane is a hydrocarbon and this means that the only two atoms there are carbon and hydrogen.
We then have;
Number of moles of the propane = mass/molar mass = 82.0 g/44 g/mol
= 1.86 moles
Number of moles of the carbon = 1.86 moles/3 = 0.62 moles
Mass of carbon = 0.62 mol * 12 g/mol = 7.44 g
Number of moles of hydrogen = 1.62/8 = 0.2 moles
Mass of the hydrogen = 0.2 moles * 2 g/mol = 0.4 g
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One of the line in the emiion pectrum of odium ha a wavelength of 590 nm. What i the frequency of thi line?
The line which has the wavelength of 590 nm in the sodium emission spectrum is yellow light whose frequency in the spectrum of sodium is 5.09×1014 sec−1.
To explain this let’s understand that the speed of light is equal to the product of wavelength and frequency.
Speed of light i.e. c =3⋅10^8ms
Also the wavelength(v) = 590 nm/5.9⋅10−7m
Now putting the formula we can state that v=cλ
Using all this together we can find λ i.e. frequency will be division of wavelength by speed of light and the answer will be =5.09×1014 sec−1
(5.9*10-7m/ 3.10^8 ms)
The emission spectrum of any chemical element/compound helps us in understanding the frequencies of electromagnetic radiation whose emission is due to an atom/molecule which transits from any high energy state to the lower energy state.
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An object placed in a graduated cylinder raises the volume from 12. 2 ml to 14. 5 ml.
The Answer for the volume of the object is 2.3 milliliter.
What is the volume of the object placed in the graduated cylinder?Geometrically measuring the volume of an object with an irregular shape is frequently challenging and challenging. Utilizing the water displacement method is the simplest way to accomplish this. This approach is well-known for being straightforward and precise and is frequently taught in chemistry or other science classes. All you'll need is the appropriate tools.
How to find the volume of Irregularly Shaped Objects?Submerge the thing in the water. Take another look at the water level to see that it has risen. The new number of units that you measured in the beaker should be noted. The object is included in this level.
To calculate the volume of an item with an irregular shape, subtract the level with the object from the level with the object. If you used a regular beaker, the outcome might be in millimeters.
Determination of volume:Given,
Initial volume in the graduated cylinder ,V= 12.2 mL
Final volume of the graduated cylinder after placing an object ,V'= 14.5
Volume occupied by an object = v
The volume of an object will be equal to the volume modified by placing it into the graduate cylinder. So,
v = V' - V = 14.5 mL - 12.2 mL = 2.3 mL
Therefore the volume of the object is =2.3 milliliter
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The given question is incomplete, the complete question is:
An object placed in a graduated cylinder raises the volume from 12. 2 ml to 14. 5 ml. Find the volume of the object.
The molar mass of o2 is 32. 0 g/mol. What mass, in grams, of o2 must react to form 3. 80 mol of al2o3? 60. 8 grams 81. 1 grams 122 grams 182 grams.
The mass of oxygen that must react is 182 g to form 3.80 mol Al₂O₃.
What are molar mass and mass?The molar mass of the substance is the sum of the atomic masses of the individual constituent atoms of the compound or molecule, whereas the mass of the substance is its weight.
The chemical process is depicted as follows:
4Al+3O₂⇒2Al₂O₃
According to the process, 3 moles of oxygen are needed to create 2 moles of aluminum oxide, hence 3.80 moles of aluminum oxide will require x moles of oxygen.
moles oxygen = 3/2 x 3.80 moles of aluminum oxide
moles oxygen = 5.7 moles
mass oxygen = moles x mass molar
mass oxygen = 5.7 x 32 g/moles= 182.4 g
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A flexible container holds 3.00mol of gas and occupies 10.0L. Some air is removed from
the container and there are now 1.90mol of gas in the container. Assume pressure
remains constant.
What is the final volume?
According to Avogadro's law, the final volume of container is 6.33 liters.
What is Avogadro's law?Avogadro's law is a gas law which states that the total number of atoms or molecules has a direct proportion to the volume occupied by a gas at a constant temperature and pressure.
It is closely related to ideal gas equation as it links temperature, pressure, volume and the amount of substance.It is given as, V∝n.
The straight line graph of volume versus moles is a straight line passing through the origin which implies that zero moles of gas occupy zero volume.
Substituting values in the formula, V₁/n₁=V₂/n₂ that is V₂=10×1.90/3=6.33 moles.
Thus, the final volume of gas is 6.33 liters.
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How many grams of lioh are needed to make 100 ml of a 0.1 m solution?
0.24 g of LiOH are needed to make 100 ml of a 0.1 m solution.
What is LiOH?Lithium hydroxide (LiOH), commonly obtained by the reaction of lithium carbonate with lime, is used in making lithium salts (soaps) of stearic and other fatty acids; these soaps are widely used as thickeners in lubricating greases.
Lithium hydroxide is an inorganic compound with the formula LiOH. It can exist as anhydrous or hydrated, and both forms are white hygroscopic solids. They are soluble in water and slightly soluble in ethanol. Both are available commercially.
LiOH (Lithium hydroxide) is a base. It is because it releases OH– (hydroxide-ion) in water. According to theories, a substance that can accept a proton or donate electrons or react with acid is classified as a base. LiOH reacts with strong acid HCl that produce LiCl and water.
Determination of mass of LiOH required:The molarity of LiOH is 0.1M
The given volume is,
M = W1 × 1000/m1 × V(ml)
m1 = molecular mass of LiOH = 24
putting the values in the previous equation,
0.1 = W1 × 1000/24 × 100
W1 = 0.1 × 24 ×100/1000
⇒ 0.24 grams of LiOH is required.
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On which slope would you expect to find the least precipitation if winds blow against a mountain from the south?
west
east
south
north
Answer: North
Explanation:
Heat energy can be transferred from one object to another because of _________.
Answer: Heat energy can be transferred from one object to another because of a difference in temperature.
Explanation: Heat energy is transferred from a warmer to a cooler object through conduction, convection and radiation. All of these require a temperature difference for heat to transfer.
Answer:
Temperature difference
Every matter has heat energy. The result of the movement of minute particles known as atoms, molecules, or ions in liquids, solids, and gases is nothing but heat energy. Heat energy can be transferred by one substance to another and the flow because of the temperature difference between two objects is known as heat.
How is the modern model of an atom different from previous models?
Bohr thought that electrons orbited the nucleus in circular paths; whereas in the modern model atomic electron structure is more like 3D standing waves.
Bohr improved on Rutherford's atomic model. The majority of the atom's mass is concentrated in its nucleus, which we now refer to as the center of the atom, and electrons surround the positive mass in a manner akin to a cloud. Bohr's use of the quantified energy to explain the model was his most important contribution. According to his theories, electrons around the nucleus have quantized potential and kinetic energy.
The model's quantification component is still thought to be sound in theory. The concept of electrons in circular orbits is the main issue. This violates the Heisenberg uncertainty principle, which states that it is impossible to simultaneously know a particle's position and momentum. Additionally, it does not eliminate the fact that atoms have a 3D formation. If the orbitals are circular, the 3D structure of an atom is not probable.
It was demonstrated that a standing wave energy level model fitted to the emission and absorption spectra of hydrogen using Schrödinger's equation. The distribution of electrons surrounding the nucleus is now described by scientists using the concept of a probability cloud.
Because the probability clouds only depict the likelihood of finding an electron in a given location and not its certainty, they are in compliance with the Heisenberg uncertainty principle. You may also see the clouds' standing wave-like shape if you look closely. Take a look at this illustration of the probability clouds for hydrogen.
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Ashley placed a notebook and sugar cubes on a scale.
The notebook and cubes are balanced at the same level on the scale.
Which of these describes the mass of the notebook and sugar cubes?
Since the notebook and cubes are balanced at the same level on the scale, the mass of the notebook and sugar cubes are equal.
The correct option is C.
What is the mass of an object?The amount of matter that makes up every object or body is the greatest way to understand mass. Everything that we can see has mass. Examples of objects with mass include a table, a chair, your bed, a football, a glass, and even air.
Masses are measured using scales.
The most typical way to measure it is as inertial mass, which refers to an object's resistance to acceleration under the influence of a net force.
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Complete question:
Ashley placed a notebook and sugar cubes on a scale.
The notebook and cubes are balanced at the same level on the scale.
Which of these describes the mass of the notebook and sugar cubes?
a. The mass of the notebook is greater than the mass of the sugar cubes
b. The mass of the notebook is less than the mass of the sugar cubes
c. The mass of the notebook is equal to the mass of the sugar cubes
Stainless steel is both acid and ______ proof.
what's the answer
Answer:
rust proof
Explanation:
LEARNING PACKET 2ALL ABOUT THE PC
PROGRESS WORKSHEET
Instruction: In this progress worksheet,kindly answer all the given
question and write your answer neatly.
Identification: Read the statement below and write your answer on the blank
provided below.
1. It designed for the use of an individual to watch movies, surf the Internet, send e-mail,
type a
letter, or even compose your very own song.
Answer: _________________________________________________________________________
2. It is a type of computer that has greater power, storage, and versatility compared to
other types of computers for personal use.
Answer: _________________________________________________________________________
3. It refers to the computer that combines all the components of a personal computer—the
monitor, the keyboard, storage devices, memory, and the processor—into one package that
is easy to carry around.
Answer: _________________________________________________________________________
4. It is a computers are lighter than laptops but with the same processing power and features.
Answer: _________________________________________________________________________
5. It is operated by using a touch screen that has a virtual keyboard, or an electronically-sensitive
pad where users handwrite their notes.
Answer: _________________________________________________________________________
HELLO CAN SOMEONE HELP TO ASWER THIS PLS I NEED IT THE DUE IS TODAY
Personal computer is designed for the use of an individual to watch movies, surf the Internet, send e-mail, type a letter, or even compose your very own song.
2. Desktop computer is a type of computer that has greater power, storage, and versatility compared to other types of computers for personal use.
3. Laptop computer refers to the computer that combines all the components of a personal computer and is easy to carry around.
4. Ultrabook is a computers are lighter than laptops but with the same processing power and features.
5. Tablet computer is operated by using a touch screen that has a virtual keyboard, or an electronically-sensitive pad where users handwrite their notes.
What is the computer about?Personal computer (PC) is a general term that refers to a computer that can be used by an individual for a variety of tasks such as watching movies, browsing the internet, sending emails, typing letters, and even composing music.
Therefore, Desktop computers are a type of personal computer that are designed for use at a fixed location. They have greater power, storage, and versatility compared to other types of computers for personal use. They generally have a separate monitor, keyboard, and processing unit, and are typically used for more demanding tasks such as gaming, video editing, and graphic design.
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Is irony an expectation?
Irony is when appearances or expectations don't match up with reality.
Following are the types of irony;
A speaker uses verbal irony when they say one thing but mean another.Dramatic irony occurs when a show's audience is aware of a fictional character in literature is clueless.Situational irony is a deviation from the anticipated outcome and real outcomesExample of irony is
According to a Greek mythology, Oedipus will kill his father and wed his mother. To stop the prophecy from happening, his father abandoned him as a baby and left him to perish. Despite his efforts, it still occurred because Oedipus didn't pass away and was unaware of the identity of his parents.
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