Answer:
1. Compress.
2. Fixed.
3. Melts.
4. Melting point.
5. Freezing point.
6. High.
7. Crystalline.
8. Lattice.
9. Unit cell.
10. Amorphous.
Explanation:
In science, matter can be defined as anything that has mass and occupies space. Any physical object that is found on earth is typically composed of matter. Matter are known to be made up of atoms and as a result has the property of existing in states.
Generally, matter exists in three (3) distinct or classical phases and these are;
1. Gas: it is the state of matter in which the physical substance has no definite shape or volume and as a result fills all available space. Also, gases are easily compressible and can flow. Examples of gases are hydrogen, oxygen, argon, nitrogen etc.
2. Liquid: it is the state of matter in which the physical substance can be poured and it takes the shape of its container. Also, liquids generally have a definite volume. Examples of liquids are urine, water, milk, blood etc.
3. Solid: it is the state of matter in which the physical substance has a definite shape and fixed volume but not compressible. Examples of solids are pen, screwdriver, television, car etc.
Filling the missing words (texts) of the question, we have;
Solids tend to be dense and difficult to compress. They do not flow or take the shape of their containers, like liquids do, because the particles in solids vibrate around fixed points. When a solid is heated until its particles vibrate so rapidly that they are no longer held in fixed positions, the solid melts. The melting point is the temperature at which a solid changes to a liquid. The melting and freezing point of a substance are at the same temperature. In general, ionic solids tend to have relatively high melting points, while molecular solids tend to have relatively low melting points. Most solids are crystalline. The particles are arranged in a pattern known as a crystal lattice. The smallest subunit of a crystal lattice is the unit cell. Some solids lack an ordered internal structure and are called amorphous solids.
Molecular crystals are held together by the intermolecular forces of dispersion and dipole-dipole forces and by hydrogen bonding. True or False
Molecular crystals are held together by the intermolecular forces of dispersion and dipole-dipole forces and by hydrogen bonding. The statement is True.
Molecular crystals are held together by the intermolecular forces of dispersion, dipole-dipole forces, and hydrogen bonding.
Dispersion forces are the weakest intermolecular forces and are present in all molecules. They are caused by the temporary uneven distribution of electrons in a molecule, which creates a temporary dipole.
The temporary dipole in one molecule can induce a dipole in another molecule, resulting in a weak attractive force.
Dipole-dipole forces are stronger than dispersion forces and are present in molecules that have a permanent dipole. The positive end of one dipole is attracted to the negative end of another dipole, resulting in a stronger attractive force.
Hydrogen bonding is the strongest intermolecular force and is present in molecules that contain a hydrogen atom bonded to a highly electronegative atom, such as oxygen, nitrogen, or fluorine.
The hydrogen atom is partially positive, while the electronegative atom is partially negative. This creates a strong attractive force between the hydrogen atom of one molecule and the electronegative atom of another molecule.
The type of intermolecular force that is most important in holding a molecular crystal together depends on the structure of the molecules in the crystal.
For example, a crystal of water is held together by hydrogen bonding, while a crystal of methane is held together by dispersion forces.
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T/F. throughout history, people have used chemicals to change their moods, behavior, and levels of consciousness.
The statement "throughout history, people have used chemicals to change their moods, behavior, and levels of consciousness. " is true.
For example, ancient civilizations used alcohol, opium, and other natural substances for medicinal and religious purposes.
In modern times, psychoactive substances such as caffeine, nicotine, and prescription medications are widely used to alter mood, perception, and behavior.
Some of these chemicals are legal, while others are illegal or controlled substances that can lead to addiction, overdose, and other negative consequences. It is important to understand the risks and benefits of using these substances and to seek help if substance abuse becomes a problem.
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3. What is the density of a 100 grams (g) box that displaces 20 mL of water?
Answer: the density is 997 kg
Explanation:
What is the number of moles in 15.0 g AsH3?
O 5.2 mol
O 1200 mol
O 0.44 mol
O 0.19 mol
Answer:
n = 0.19 mol
Explanation:
Given mass = 15 g
The molar mass of AsH₃ = 77.94 g/mol
We need to find the number of moles in 15 g of AsH₃. We know that,
No. of moles = given mass/molar mass
[tex]n=\dfrac{15}{77.94 }\\\\n=0.19\ mol[/tex]
So, there are 0.19 g/mol. Hence, the correct option is equal to 0.19 mol.
Which type of radioactive decay results in no change in mass number and atomic number for the starling nucleus? A) beta B) alpha C) electron capture D) gamma E) positron emission
The type of radioactive decay that results in no change in mass number and atomic number for the starting nucleus is gamma decay. The correct answer is option D.
Gamma decay is a type of radioactive decay that involves the emission of gamma rays from an atomic nucleus. Gamma rays are high-energy photons that are emitted when the nucleus undergoes a transition from a higher energy state to a lower energy state. Gamma decay does not result in a change in the atomic number or mass number of the nucleus, as no particles are emitted from the nucleus. Instead, the nucleus simply releases energy in the form of a gamma ray. Therefore, option D) Gamma is the correct answer.
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Please help I need answer soon.
A volcanic mountain made up of volcanic ash, cinders, and bombs is called a ___________________.
Answer:
Cinder cone
Explanation:
if 15.70g of ticl4 reacts in excess oxygen to form 10.40g cl2 what is the percent yield of the reaction
The percent yield of the reaction is approximately 88.71%.
To calculate the percent yield of the reaction, we need to compare the actual yield (the amount of Cl₂ formed) to the theoretical yield (the amount of Cl₂ that would be formed if the reaction proceeded with complete conversion of TiCl₄).
First, we need to determine the molar masses of TiCl₄ and Cl₂. The molar mass of TiCl₄ is calculated as follows:
Ti: 1 atom x 47.87 g/mol = 47.87 g/mol
Cl: 4 atoms x 35.45 g/mol = 141.80 g/mol
Total molar mass of TiCl₄ = 47.87 g/mol + 141.80 g/mol = 189.67 g/mol
Next, we can calculate the number of moles of TiCl₄ and Cl₂ based on the given masses:
Moles of TiCl₄ = 15.70 g / 189.67 g/mol ≈ 0.08274 mol
Moles of Cl₂ = 10.40 g / 70.90 g/mol ≈ 0.14676 mol
From the balanced chemical equation for the reaction:
TiCl₄ + 2O₂ → TiO₂ + 2Cl₂
We can see that the stoichiometric ratio between TiCl₄ and Cl₂ is 1:2. Therefore, according to the balanced equation, the theoretical yield of Cl₂ would be:
Theoretical yield of Cl₂
= 2 (moles of TiCl₄)
= 2 (0.08274 mol)
= 0.16548 mol
Percent yield = (actual yield / theoretical yield) 100
= (0.14676 mol / 0.16548 mol) 100 ≈ 88.71%
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Is Chlorine and Sodium an Ionic or Covalent bond?
Answer:
It is an Ionic bond
Why does the offspring have identical inherited traits as the parent?
Define orbit and orbital motion, and explain why orbital motion occurs.
Answer:
Orbital motion occurs whenever an object is moving forward and at the same time is pulled by gravity toward another object. ... The result is a circular or oval path called an orbit, in which one object keeps moving around the other. Because of the relatively great gravity of the sun, Earth orbits the sun
in the following voltaic cell, the addition of cucl2(aq) to the cathodic compartment would cause the emf to increase. sn(s) 2 cu2 ⇄ sn2 (aq) 2 cu (aq) choix de groupe de réponses. true or false
The statement on the effect of the addition of CuCl₂(aq) to the cathodic compartment is True.
What effect does the addition of CuCl₂(aq) to the cathodic compartment bring ?According to Le Chatelier's principle, if the concentration of a reactant in a reaction at equilibrium is increased, the reaction will shift in the direction that consumes that reactant.
The reaction at the cathode is :
Cu₂ + ( aq ) + 2e- ⇄ Cu(s)
By adding CuCl₂(aq), we increase the concentration of Cu₂+ ions in the cathodic compartment. This would cause the reaction to shift to the right, which means more Cu(s) would be produced and more electrons would be consumed.
Therefore, increasing the concentration of Cu₂+ ions in the cathodic compartment will increase the cell potential or emf.
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calculate+the+milligrams+of+cl+(35.453+g/mol)+in+a+3.49+g+sample+of+cleaning+solution+containing+21.5+wt%+naocl+(74.44+g/mol).+naocl+is+the+only+source+of+cl+in+this+solution.
There are 356.2 mg of Cl in a 3.49 g sample of cleaning solution containing 21.5 wt% NaOCl (74.44 g/mol).
To calculate the milligrams of Cl (35.453 g/mol) in a 3.49 g sample of cleaning solution containing 21.5 wt% NaOCl (74.44 g/mol), first calculate the weight of NaOCl in the sample:3.49 g x 0.215 = 0.75 g NaOCl
Next, calculate the number of moles of NaOCl in the sample:0.75 g NaOCl ÷ 74.44 g/mol = 0.01006 mol NaOClSince NaOCl is the only source of Cl in the solution, this also represents the number of moles of Cl in the sample.
Finally, convert the number of moles of Cl to milligrams:0.01006 mol x 35.453 g/mol x 1000 mg/g = 356.2 mg Cl.
We have to calculate the milligrams of Cl in a cleaning solution sample.
The sample contains NaOCl, so we will first calculate the number of moles of NaOCl in the sample. This will also give us the number of moles of Cl in the sample because NaOCl is the only source of Cl in the solution.
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in the self splicing of group 1 introns, the first transesterification reaction is initiated by:
In the self-splicing of group 1 introns, the first transesterification reaction is initiated by the nucleophilic attack of the 3' hydroxyl group of the guanosine nucleotide within the intron on the 5' splice site.
This nucleophilic attack forms a 3' - 5' phosphodiester bond and releases the 5' exon. This process is facilitated by the catalytic properties of the intron RNA itself, without the involvement of any protein factors.
The self-splicing of group 1 introns involves two transesterification reactions that lead to the removal of the intron and the joining of the flanking exons.
The first transesterification reaction is the key step that initiates the splicing process. It is the attack of the guanosine nucleotide on the 5' splice site that triggers the subsequent splicing reactions.
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What is the molarity of an aqueous solution that contains 78g of C6H12O6 dissolved in 2500 mL of solution?
Answer:
[tex]\boxed {\boxed {\sf molarity = 0.17 \ M \ C_6H_12O_6}}[/tex]
Explanation:
Molarity is found by dividing the moles of solute by liters of solution.
[tex]molarity = \frac {moles}{liters}[/tex]
We are given grams of a compound and milliliters of solution, so we must make 2 conversions.
1. Gram to Moles
We must use the molar mass. First, use the Periodic Table to find the molar masses of the individual elements.
C: 12.011 g/mol H: 1.008 g/mol O: 15.999 g/molNext, look at the formula and note the subscripts. This tells us the number of atoms in 1 molecule. We multiply the molar mass of each element by its subscript.
6(12.011)+12(1.008)+6(15.999)=180.156 g/mol
Use this number as a ratio.
[tex]\frac {180.156 \ g\ C_6H_12 O_6}{ 1 \ mol \ C_6H_12O_6}[/tex]
Multiply by the given number of grams.
[tex]78 \ g \ C_6H_12O_6 *\frac {180.156 \ g\ C_6H_12 O_6}{ 1 \ mol \ C_6H_12O_6}[/tex]
Flip the fraction and divide.
[tex]78 \ g \ C_6H_12O_6 *\frac { 1 \ mol \ C_6H_12O_6}{180.156 \ g\ C_6H_12 O_6}[/tex]
[tex]\frac { 78 \ mol \ C_6H_12O_6}{180.156 }= 0.432958102977 \ mol \ C_6H_12O_6[/tex]
2. Milliliters to Liters
There are 1000 milliliters in 1 liter.
[tex]\frac {1 \ L }{ 1000 \ mL}[/tex]
Multiply by 2500 mL.
[tex]2500 \ mL* \frac {1 \ L }{ 1000 \ mL}[/tex]
[tex]2500 * \frac {1 \ L }{ 1000 }= 2.5 \ L[/tex]
3. Calculate Molarity
Finally, divide the moles by the liters.
[tex]molarity = \frac {0.432958102977 \ mol \ C_6H_12O_6}{ 2.5 \ L}[/tex]
[tex]molarity = 0.173183241191 \ mol \ C_6H_12O_6/L[/tex]
The original measurement has 2 significant figures, so our answer must have the same. That is the hundredth place and the 3 tells us to leave the 7.
[tex]molarity \approx 0.17 \ mol \ C_6H_12O_6 /L[/tex]
1 mole per liter is also equal to 1 M.
[tex]molarity = 0.17 \ M \ C_6H_12O_6[/tex]
why is solubility of sucrose (sugar), histidine (an amino acid), gelatin (a protein), and vegetable oil (fat) biologically relevant?
The solubility of compounds such as sucrose, histidine, gelatin, and vegetable oil is biologically relevant due to various reasons. Solubility affects nutrient absorption, cellular processes, transport and distribution of molecules, structural and functional roles of biomolecules, and biological interactions.
What is solubilitySolubility facilitates the digestion and absorption of nutrients, enables cellular reactions and enzymatic processes, influences nutrient transport and distribution within organisms, contributes to the structural and functional properties of biomolecules, and impacts molecular interactions within biological systems. Understanding the solubility of these compounds enhances our understanding of biological mechanisms and aids in the development of therapeutic and nutritional approaches.
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1. Calculate the number of grams of nickel (II) nitrate hexahydrate required to prepare 25 mL of solution with a concentration of 0.034 M. CHECK WITH YOUR INSTRUCTOR BEFORE PROCEEDING. Write the ionic formula, molar mass and this described calculation in the Data and Observations section of your lab report PRIOR TO LAB - I will check this as part of your prelab..
To calculate the number of grams of nickel (II) nitrate hexahydrate required, we need to use the formula:
moles = concentration (M) x volume (L)
First, let's convert the volume from milliliters (mL) to liters (L):
25 mL = 25/1000 L = 0.025 L
The molar mass of nickel (II) nitrate hexahydrate can be calculated as follows:
Nickel (Ni) atomic mass = 58.69 g/mol
Nitrogen (N) atomic mass = 14.01 g/mol
Oxygen (O) atomic mass = 16.00 g/mol
Molar mass of nickel (II) nitrate = (1 * Ni) + (2 * N) + (6 * O)
= (1 * 58.69) + (2 * 14.01) + (6 * 16.00)
= 58.69 + 28.02 + 96.00
= 182.71 g/mol
Now, we can calculate the number of moles:
moles = 0.034 M x 0.025 L
= 0.00085 moles
Finally, we can calculate the mass of nickel (II) nitrate hexahydrate:
mass = moles x molar mass
= 0.00085 moles x 182.71 g/mol
≈ 0.155 grams
Therefore, approximately 0.155 grams of nickel (II) nitrate hexahydrate are required to prepare a 25 mL solution with a concentration of 0.034 M.
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um can someone help balance this...id.k how
CH4 + 2 O2 = CO2 + 2 H2O
i believe it's this :p
Which of the molecules are used as second messengers in signal transduction pathways? insulin adenyl cyclase CAMP calcium ions P3
The molecules used as second messengers in signal transduction pathways are cAMP (cyclic adenosine monophosphate) and calcium ions. Options C and D are correct.
Cyclic adenosine monophosphate (cAMP) and calcium ions are both important second messengers involved in signal transduction pathways. When a signaling molecule, such as a hormone or neurotransmitter, binds to a receptor on the cell surface, it initiates a cascade of intracellular events.
One of these events is the activation of enzymes, such as adenylate cyclase, which synthesizes cAMP from ATP. cAMP then acts as a second messenger by binding to and activating protein kinase A (PKA), leading to the phosphorylation of target proteins and the amplification of the signal. Calcium ions also play a crucial role as second messengers by mediating various cellular processes.
They can be released from intracellular stores or enter the cell through calcium channels, and their binding to specific proteins triggers downstream signaling events. Together, cAMP and calcium ions function as key mediators in signal transduction, transmitting and amplifying signals from the cell surface to the intracellular environment. Options C and D are correct.
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What form of electromagnetic radiation does gamma radiation use?
Answer:
Gamma-rays are a form of electromagnetic radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Gamma-rays can be used to treat cancer, and gamma-ray bursts are studied by astronomers.
Explanation:
Hope this helped Mark BRAINLIEST!!!
Gamma Rays are ionizing Electromagnetic radiation, obtained by the decay of an atomic nucleus. Gamma rays are more penetrating, in matter, and can damage living cells to a great extent. Gamma rays are used in medicine (radiotherapy), industry ( Sterilization and disinfection) and the nuclear industry.
A mass of 80 grams of Bromine would be
Hydrogen peroxide is a powerful oxidizing agent that is used in concentrated solution in rocket fuels and dilute solution as a hair bleach.
A 30% by mass of H2O2 solution has a density of 1.11g/ml. Calculate it's morality, mole fraction of H2O2, and molarity.
The molarity of the 30% by mass hydrogen peroxide solution is 9.78 M, the mole fraction of H2O2 is 1.0, and the molar concentration is also 9.78 M.
To calculate the molarity, mole fraction, and molar concentration (molarity) of a 30% by mass hydrogen peroxide (H2O2) solution with a density of 1.11 g/ml, we need to follow these steps:
Step 1: Calculate the molarity (M):
The molarity is defined as the number of moles of solute per liter of solution. We need the molar mass of hydrogen peroxide to calculate the number of moles.
The molar mass of H2O2 = 2(1.01 g/mol) + 2(16.00 g/mol) = 34.02 g/mol
The mass of H2O2 in 100 g of the solution (30% by mass) = 30 g
Number of moles of H2O2 = mass / molar mass = 30 g / 34.02 g/mol = 0.882 mol
The volume of the solution can be calculated using the density:
Volume of solution = mass of solution / density = 100 g / 1.11 g/ml = 90.09 ml = 0.09009 L
Molarity (M) = moles / volume = 0.882 mol / 0.09009 L = 9.78 M
Step 2: Calculate the mole fraction (χ) of H2O2:
The mole fraction is the ratio of the moles of H2O2 to the total moles of all components in the solution.
Mole fraction (χ) = moles of H2O2 / total moles
Total moles = moles of H2O2 = 0.882 mol
Mole fraction (χ) = 0.882 mol / 0.882 mol = 1.0
Step 3: Calculate the molar concentration (molarity):
Molar concentration (molarity) is the number of moles of solute per liter of solution.
Molarity (M) = moles of H2O2 / volume of solution = 0.882 mol / 0.09009 L = 9.78 M
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In the cytosol of rat hepatocytes, the temperature is 37°C and the mass-action ratio, Q, is [ATP]/[ADP][Pi] = 5.33 x 10M- Calculate the free energy required to synthesize ATP in a rat hepatocyte (AG'º for ATP hydrolysis is -30.5 kJ/mol.)
The free energy required to synthesize ATP in a rat hepatocyte is 24,365.6364 J/mol
To calculate the free energy required to synthesize ATP in a rat hepatocyte, we can use the formula:
ΔG'º = -RTln(Q)
where:
ΔG'º is the standard free energy change,
R is the gas constant (8.314 J/(mol·K)),
T is the temperature in Kelvin,
ln(Q) is the natural logarithm of the mass-action ratio.
Given:
ΔG'º = -30.5 kJ/mol
T = 37°C = 37 + 273.15 = 310.15 K
Q = 5.33 x [tex]10^{(-10)[/tex] M
First, we need to convert ΔG'º from kJ/mol to J/mol:
ΔG'º = -30.5 kJ/mol = -30.5 x [tex]10^3[/tex] J/mol
Next, we can calculate the free energy required to synthesize ATP using the formula:
ΔG = ΔG'º - RTln(Q)
ΔG = [tex](-30.5 * 10^3 J/mol) - (8.314 J/(molK) * 310.15 K) * ln(5.33 x 10^{(-10))[/tex]
≈ -30,500 J/mol - 2576.1911 J × (-21.3364)
≈ -30,500 J/mol + 54,865.6364 J
≈ 24,365.6364 J/mol
Calculating this expression will give us the value of ΔG, which represents the free energy required to synthesize ATP in a rat hepatocyte.
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An object traveling around another object space is in blank
Answer: An orbit is a regular, repeating path that one object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like Earth or the moon. Many planets have moons that orbit them
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Which plate does not appear in both hemispheres?
Indo-Australian
African
Pacific
Eurasian
Answer:
Indo-Australian
Explanation:
Indo-Australian does not appear in both hemispheres.
Answer:
I can clarify, its into Australian
if this atom has one additional neutron but the other subatomic particles remained the same as shwon, this slightly different atoms would be called
If this atom has one additional neutron but the other subatomic particles remained the same as shown, this slightly different atom would be called an isotope.
What is an isotope?An isotope is a variant of an atom that has a different number of neutrons. Because isotopes of the same element have the same number of protons in the nucleus, they all have the same atomic number. However, they can differ in mass number, and therefore in atomic mass. In a neutral atom, the number of protons in the nucleus equals the number of electrons that orbit the nucleus, giving the atom a net electrical charge of zero.
However, the number of neutrons in the nucleus can differ, implying that isotopes of the same element may have different atomic masses.
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Match the different methods used for calculating revenue and profit to the formulas used for calculating them. total revenue average revenue marginal revenue gross profit net profit
Answer:
See explanation below
Explanation:
1) Total Revenue:
Total revenue refers to the total amount of income that is generated when a company sells or offers their service.
It is usually calculated as the product of the product or services sold by the quantity.
It is calculated by ;
TR = Q * P
Where TR = Total Revenue
Q = Quantity
P = Price
2.) Average Revenue:
Average revenue is the revenue gotten by a company per unit of output sold. It is calculated by:
AR = TR / Q
Where AR = Average Revenue
TR = Total Revenue
Q. = Quantity
3.) Marginal Revenue:
This is the net revenue that is generated by selling an additional unit of commodity; which is the change in total revealer unit. It is calculated by:
MR = change in Total Revenue / change in Quantity
Where MR = Marginal Revenue
4.) Gross Profit:
Gross profit is the amount of revenue left after factoring out the cost of production and sales and servicing.
It is calculated by subtracting revenue from the cost of goods sold -
Gross Profit = Revenue - Cost of goods sold
Net Profit:
Net profit is the amount of money a company has left after subtracting all interests, tax expenses and cost.
It is calculated by;
Net Profit = Gross Profit - Expenses
Balance C12H22011 → C + H2
Answer:
What is this?
Explanation:
Question 1 (1 point) How many stars are in our solar system? A. About 20.000 B. About 300,000 C. One D. About 5,000
Answer:
C. one star
Explanation:
Of course our solar system has one unique star which is the sun while others have atleast two which are called binary solar
Which of the following equilibria could be used to support the claim that the addition of a small amount of NaOH to the buffer will result in only a very small change in pH? (see image)
I think First statement that is Option A, because, it has total equilibrium on both side, which will never result in increase of any pH level higher or lower than the state, hence
Option A.) is correct
When an aqueous solution of silver nitrate is
mixed with an aqueous solution of potassium
chloride which are the spectator ions?
Answer:
[tex]K^{+}[/tex] and [tex]NO_{3}^{-}[/tex]
Explanation:
The equation for the reaction is AgNO3(aq) + KCl(aq) ==> AgCl(s) + KNO3(aq)
With all the ions, it is
[tex]Ag^{+}[/tex](aq) + [tex]NO_{3} ^{-}[/tex](aq) + [tex]K^{+}[/tex](aq) + [tex]Cl^{-}[/tex](aq) ==> AgCl(s) +
[tex]K^{+}[/tex] and [tex]NO_{3} ^{-}[/tex] do not change, so they are the spectator ions and are removed
The ionic equation is:
[tex]Ag^{+}[/tex](aq) + [tex]Cl^{-}[/tex](aq) ==> AgCl(s)