The balanced chemical reaction that will occur if you add NaOH to a buffer made from HNO2 and NaNO2 is:
HNO2 + NaOH → NaNO2 + H2O
In this reaction, the NaOH will react with the HNO2 present in the buffer to form NaNO2 and water.
This reaction will result in the consumption of some of the HNO2 present in the buffer, which will cause a shift in the pH of the buffer solution.
However, since the buffer contains both the weak acid HNO2 and its conjugate base NaNO2, the buffer capacity will still be maintained, and the pH of the solution will remain relatively stable.
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an aqueous solution of acetic acid consists of water molecules, molecules of ch3cooh, acetate ions, and protons. which species is present in the largest amount?
The species present in the largest amount in an aqueous solution of acetic acid is water molecules.
In an aqueous solution of acetic acid (CH3COOH), the species present in the largest amount is water molecules (H2O). This is because acetic acid is a weak acid and does not completely dissociate in water, resulting in a relatively small number of acetate ions (CH3COO-) and protons (H+).
Water molecules, being the solvent, are present in a significantly larger quantity compared to the other species in the solution.
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Which of the following diagrams represents a
single displacement (replacement) reaction?
Answer:
D
Explanation:
A displacement equation is simply when one atom is replaced by a different atom.
In this case, the white square is replaced by the grey circle, so D is the answer.
Though it is tempting to say so, A is not the answer because it is a double displacement.
how are amino acids different from each other? (apex)
A) they have different carboxyl groups
B) they have different bases
C) they have different side chains
D) they have different amine groups
Answer:
C) They have different side chains.
Explanation:
Amino acids are the building blocks of proteins and are composed of an amine group (NH2), a carboxyl group (COOH), and a side chain that is unique to each amino acid. While all amino acids have the same basic structure, their side chains or R groups are different and give each amino acid its unique chemical properties. Therefore, the correct answer is that amino acids differ from each other based on their side chains.
The half-life of a chemical reaction was found to be independent of the quantity of material which the researcher employed. The reaction is therefore
A. Possibly first order
B. Definitely first order
C. Zero order
D. Possibly second order
E. Definitely second order
The fact that a chemical reaction's half-life is unaffected by how much material is consumed shows that the reaction is option C: zero order.
The rate of a zero-order reaction is independent of the reactant concentration, which means that the reaction progresses steadily over time regardless of the reactant concentration at the start. As a result, the reaction's half-life is unaffected by the material's original concentration or amount consumed.
Order of a reaction is generally defined as the sum of the concentration terms which can only be determined experimentally. According to the rate law, in an equation of the form:
A + B > C + D
Rate is given equivalent to:
Rate = k [A]ᵃ[B]ᵇ, where
a and b are the concentration terms of the reactants, and k is the rate constant. The order of the reaction can thus be given as their sum:
Order of a reaction = a + b.
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A bowling ball rolls 2.5 m in 0.98 s. What was the bowling ball's average speed
According to the question, if A bowling ball rolls 2.5 m in 0.98 s, the bowling ball's average speed was 2.55 meters per second.
The average speed of the bowling ball can be calculated by dividing the total distance traveled by the time taken, so we get:
Average speed = distance/time
In this case, the distance traveled by the bowling ball is 2.5 meters and the time taken is 0.98 seconds, so:
Average speed = 2.5 m/0.98 s
Simplifying this expression gives:
Average speed = 2.55 m/s
Therefore, the bowling ball's average speed as calculated above was 2.55 meters per second.
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uses of acids with examples
Answer:
Uses of acids:
Vinegar, a diluted acetic acid solution is used as a food preservative.
Sulfuric acid is widely used in batteries.
Nitric acid and sulfuric acid are used in the industrial production of explosives, dyes, fertilizers, and paints.
Phosphoric acid is the main constituent in different soft drinks.
Select the procipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate. A) NaNOs B) NaNO, C) PBSO. D) Pb SO, E) PbS
The precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate is PbSO₄, which is option D.
When lead(II) nitrate (Pb(NO₃)₂ and sodium sulfate (Na2SO4) are mixed in water, they undergo a double displacement reaction, also known as a precipitation reaction.
In this type of reaction, the cations and anions of two different compounds exchange places, forming two new compounds.
The balanced chemical equation for the reaction shows that one molecule of lead(II) nitrate reacts with one molecule of sodium sulfate, producing one molecule of solid lead(II) sulfate and two molecules of aqueous sodium nitrate:
Pb(NO₃)₂(aq) + Na₂SO₄(aq) → PbSO₄(s) + 2 NaNO₃(aq)
The solid lead(II) sulfate that forms is insoluble in water, meaning that it cannot dissolve and remains as a solid in the solution. This solid is the precipitate that is formed as a result of the reaction.
Therefore, the answer is option D, PbSO₄.
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how many milligrams of carbon monoxide does the average person inhale in an 8 hour period for this level of carbon monoxide pollution? assume that the carbon monoxide has a density of 1.2 g/l . (hint: 15.0 ppm co means 15.0 lco per 106l air.)
Assuming that carbon monoxide has a density og 1.2 g/L, An average person in 8 hour period of time inhales 8.64 mg of carbon monoxide pollution.
In the earth's atmosphere, carbon monoxide is present at very low concentrations. A typical concentration of CO in Earth's troposphere is around 100 parts per billion(ppb), meaning one hundred out of every billion air molecules is carbon monoxide.
There are 1000 milligrams in a gram, so 0.0864 g of CO is equal to 0.0864 ×1000 = 86.4 mg of CO. So, the average person inhales 86.4 mg of carbon monoxide in an 8-hour period at this level of carbon monoxide pollution.
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which statmemt is true for most chemical reactions an energy change occurs during the breaking and forming of bonds
An energy change occurs during the breaking and forming of bonds is true for most chemical reactions an energy change occurs during the breaking and forming of bonds .
Chemical bonds between atoms and molecules can break and form during chemical reactions. Existing bonds must be broken in order for new ones to form, which releases energy during the process. The enthalpy change or overall energy change during a chemical reaction is typically expressed as the energy difference between the products and the reactants.
Depending on whether energy is absorbed or released during a reaction, the enthalpy change can either be positive or negative. The reaction is exothermic and energy is released if the enthalpy of the products is lower than the enthalpy of the reactants. The reaction is endothermic and energy is absorbed if the enthalpy of the products is greater than the enthalpy of the reactants.
The question is incomplete, complete question will be "Which statement is true for most chemical reactions?
An energy change occurs during the breaking and forming of bonds.
The internal energy of the system increases during a reaction.
Energy is released during the formation of reactants.
The enthalpy of the products is higher than the enthalpy of the reactants."
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A helium tank contains 25.2 L of helium at 8.40 atm pressure. Determine how many 1.50-L balloons at 755 mm Hg can be inflated with the gas in the tank, assuming that the tank will also have to contain He at 755 mm Hg after the balloons are filled (that is, it is not possible to empty the tank completely). The temperature is 25 ∘ C in all cases.
We can calculate the number of balloons it can prepare using the 7.629 moles that are available. Assuming there is still He in the tank with a pressure of 755 mmHg, about 125 balloons may be created from the specified amount of helium.
10L of helium can fill how many balloons?High quality technical helium measuring 1.81M3 is contained in a 10L cylinder. About 290 9-inch latex balloons, 200 10" latex balloons, 150 11" latex balloons, and 125 18" foil balloons may be inflated using this device. The precise amount of balloons used may change based on waste and the surrounding temperature.
Based on the number of balloons you'll need for your event, helium tanks are available in four different sizes.
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Anyone know the answers to this? Please respond fast
Based on the hydrogen ions concentration and the hydroxide ions concentration of solutions, the pH, pOH, acidic, or basic nature of the solution is given as follows:
Solutions [H⁺] < 1 * 10⁻⁷ has a pH less than 7 and is acidicSolution having [H⁺] > 1 * 10⁻⁷ has a pH greater than 7 and are basicSolutions having [OH⁻] < 1 * 10⁻⁷ have a pOH greater than 7 and are acidicSolution having [OH⁻] > 1 * 10⁻⁷ has a pOH less than 7 and are basicWhat are pH and pOH?The hydrogen ion potential is known as pH.
The potential of hydroxide ions is known as pOH.
It is a scale used to estimate the hydrogen ion (H+) concentration in the solution.
The hydroxide ion (OH-) concentration of the solution is measured using this scale.
Alkalinity, or the concentration of hydroxide ions in a solution, is quantified by pOH.
Knowing the solution's pH makes calculating its pOH value simpler because pH + pOH = 14.
You might alternatively use the formula pOH = -log [OH-].
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Gives what happens at neutral pH for aluminum hydroxide.
A) Al(H2O)5^3+ precipitates
B) Al(H2O)4(OH)2^- dissolves
C) Al(OH)3 precipitates
D) Al precipitates
E) Al dissolves
What happens at neutral pH for aluminum hydroxide. At neutral pH, the correct answer is:
C) Al(OH)3 precipitates
At neutral pH, which is typically around 7, aluminum hydroxide, Al(OH)3, forms a solid precipitate due to its low solubility in water.
Aluminum hydroxide may increase calcium loss in the urine and stools. A little quantity of aluminium is absorbed from antacids that contain aluminium since aluminium is a hazardous mineral. As a result, few doctors advise routinely taking antacids that include aluminum.
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List all elements in periodic table.
# of protons
# of neutrons
# of electrons
# of valence electrons
Solid,gas, liquid
Atomic symbol
Ion charge
Answer ASAP pls
The chemical elements are arranged in rows and columns on what is known as the periodic table, or periodic table of the (chemical) elements.
Thus, It is frequently used in physics, chemistry, and other sciences and is frequently regarded as a symbol of chemistry.
It is a visual representation of the periodic law, which claims that the atomic numbers of chemical elements have a roughly periodic relationship with their attributes.
The table is divided into four blocks that are about rectangular in shape. The table's columns are referred to as groups and its rows are known as periods.
Thus, The chemical elements are arranged in rows and columns on what is known as the periodic table, or periodic table of the (chemical) elements.
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which of the following are considered to be advantages of water as a liquid medium over other possible liquid mediums for life found in our solar system (such as liquid ammonia, methane, or ethane)? which of the following are considered to be advantages of water as a liquid medium over other possible liquid mediums for life found in our solar system (such as liquid ammonia, methane, or ethane)? water molecules are electrically neutral overall. water remains liquid at a higher temperature than the other substances. water is the only one of these substances that floats when frozen. water molecules have charge separation that allows the formation of chemical bonds that can't be made by the other substances. water is the only one of these substances that contains oxygen.
The advantages of water as a liquid medium are : Water remains liquid at the higher temperature than other substances.
Water molecules have the charge separation that allows the formation of the chemical bonds which can not be form by the other substances.
Water is the only one substances that will floats when frozen.
Water is the unique substance which is formed by the two molecules of the hydrogen and the one molecule of the oxygen. The water is found in the different forms on the earth, like as ocean river etc.
The major part of the water is found in the liquid medium at the earth's temperature.
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a hydrochloric acid solution will neutralize a sodium hydroxide solution. part a write a balanced chemical equation for the neutralization reaction.
The balanced chemical equation is given as,
NaOH + HCl → NaCl + H₂O
Generally, Balanced chemical equation is described as a chemical equation in which the number of each species of atom is exactly same on the both reactant and product sides of the equation.
Basically, Subscripts is described as the part of the chemical formulas of the reactants and products which is used to indicate the number of atoms of the preceding element.
The reaction of hydrochloric acid and sodium hydroxide results in the formation of sodium chloride (salt) along with water. The reaction is known as neutralization reaction in which a salt is produced.
Hence, the balanced chemical equation is given as follows,
NaOH + HCl → NaCl + H₂O
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carbon atoms get stored in new organic carbon compounds created by what process?
The process responsible for creating new organic carbon compounds is called photosynthesis.
Photosynthesis is a vital process that occurs in plants, algae, and some microorganisms, such as cyanobacteria. It allows these organisms to convert sunlight, carbon dioxide (CO₂), and water (H₂O) into glucose and oxygen (O₂).
During photosynthesis, light energy from the sun is absorbed by chlorophyll, a pigment found in chloroplasts within plant cells. This energy is used to convert CO₂ and H₂O into glucose, a simple sugar, and O₂. The glucose serves as an energy source and building block for the organisms, while O₂ is released into the atmosphere as a byproduct.
As plants and other photosynthetic organisms grow, they use the glucose to form more complex organic compounds, such as cellulose and starch, which make up their biomass. This process results in the storage of carbon atoms in these organic carbon compounds. When these organisms die and decay, the carbon they contain may be released back into the atmosphere as CO₂ or stored in soil and sediment as organic matter.
In summary, photosynthesis is the key process responsible for the creation of new organic carbon compounds, and it plays a critical role in the Earth's carbon cycle by storing carbon atoms and maintaining the balance of CO₂ in the atmosphere.
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Calculate the bond energy per mole for breaking all the bonds in methane, CH4. Express your answer to four significant figures and include the appropriate units. 1288 KJ mol Submit Hints My Answers Give Up Review Part Incorrect; Try Again; 5 attempts remaining
The bond energy per mole for breaking all the bonds in methane, CH4, is 1288 KJ mol.
Bond energy is the energy required to break a chemical bond, and breaking all the bonds in methane requires a total of 1288 KJ mol of energy.
Bond energy is calculated by subtracting the total enthalpy of the products from the total enthalpy of the reactants. In the case of methane, the reactants are CH4 and the products are H2 and C.
The bond energy of methane is calculated by subtracting the total enthalpy of the products from the total enthalpy of the reactants. When the bonds in CH4 are broken, energy is released and the total energy released is 1288 KJ mol. This energy is known as the bond energy of methane.
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why is firstlabs testing samples for heavy metals?
Firstlabs is testing samples for heavy metals because heavy metals can be harmful to human health, and exposure to these metals can occur through a variety of sources, including contaminated soil, water, food, and air. Heavy metals such as lead, cadmium, arsenic, and mercury can accumulate in the body over time and lead to a range of health problems.
Firstlabs is likely testing samples from various sources, such as drinking water, soil, food, and consumer products, to identify potential sources of heavy metal contamination and assess the level of risk to human health. This information can be used to inform public health policies and guidelines and to identify opportunities for remediation and risk reduction. Additionally, the testing may be required by regulatory agencies to ensure compliance with established safety standards for heavy metal exposure.
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Final Question: Design a device to prevent tires from changing pressure in the winter. The only limitation to your device is that the car still has to be drivable. Draw and describe your device on a blank sheet of paper and give it to your teacher when done. Use colors and labels as you see fit. You do NOT need to write anything for this question.
My tool is made to keep a car's tyres inflated during the winter. It consists of a small electric pump connected to a pressure sensor on the tire. The tyre pressure will be determined by the pressure sensor, which will then transmit the results to the electric pump.
The tire's pressure will then be adjusted proportionally by the electric pump to keep it at the proper level. The pump will be powered by the vehicle's batteries and be able to change the tire's pressure without impairing the vehicle's ability to move.
I'll use screws to fasten the gadget to the car's frame to ensure its safety and security. To ensure its lifetime, the gadget will also be waterproof and dustproof.
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how much energy does it take to ionize a hydrogen atom that is in its fourth excited state?
The amount of energy required to ionize a hydrogen atom that is in its fourth excited state is 10.2 eV.
This amount of energy is equivalent to the energy released when an electron is subjected to an electric field of 1.36x10^8 V/cm. To ionize a hydrogen atom in its fourth excited state, the energy must be greater than the energy of the atom's ground state.
This can be done by supplying the atom with additional energy from an outside source, such as light or electric fields. Once enough energy is provided, the atom can overcome the potential barrier and become ionized. This process is referred to as “field ionization”, and it is used to produce ions in a laboratory setting.
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which pair has the greatest electronegativity ca or ga li or o cl or s br or as ba or sr o or s
Answer:
The pair with the greatest electronegativity is O and S. Oxygen (O) has an electronegativity of 3.44, while sulfur (S) has an electronegativity of 2.58. This makes the difference between the two elements 0.86, which is the greatest difference of all the pairs listed.
Choose 1- concentrations- temperatures - compoundsChoose 2- higher masses - lower temperatures- lower concentrationsChoose 3- a table- a plot- a spectrophotometerTo calculate the Ksp value in the presence of ion activity, it is necessary to measure the ion product at the point of saturation for multiple (Choose 1). The ion product nears the Ksp value at (Choose 2) due to lower ionic strength and (Choose 3) is finally used to determine the Ksp Value.
To calculate the Ksp value in the presence of ion activity, it is necessary to measure the ion product at the point of saturation for multiple concentrations (Choose 1). The ion product nears the Ksp value at lower temperatures and lower concentrations (Choose 2) due to lower ionic strength, and a spectrophotometer (Choose 3) is finally used to determine the Ksp value.
To calculate the Ksp value in the presence of ion activity, it is necessary to measure the ion product at the point of saturation for multiple concentrations. The ion product nears the Ksp value at lower concentrations due to lower ionic strength and a plot is finally used to determine the Ksp value.
This plot can be generated using a spectrophotometer or by creating a table of ion concentrations and corresponding measured values. Higher masses can also be used to determine the Ksp value, but this method is less common. Lower temperatures may affect the solubility of the compound, but do not directly impact the calculation of the Ksp value.
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How is the concentration of dye monitored during the reaction in this experiment? Select one: Measuring volume of gas produced O UV-Vis absorption O Redox Acid-base titration
The concentration of dye monitored during the reaction in this experiment is done through UV-Vis absorption.
Prepare the dye solution for the reaction.During the reaction, periodically collect small samples of the solution.Use a UV-Vis spectrophotometer to measure the absorption of each sample at a specific wavelength. The absorption is related to the concentration of the dye in the solution.Record the absorption values and create a calibration curve to correlate absorption with concentration.Use the calibration curve to monitor the concentration of the dye throughout the reaction.Learn more about spectrophotometer: https://brainly.com/question/2201903
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12. How many mL of 2.0 M aluminum sulfate
solution should be diluted to produce 275 mL of
0.60 M solution?
To calculate the volume of the 2.0 M aluminum sulfate solution needed to dilute to produce 275 mL of 0.60 M solution, we can use the equation for dilution:
M1V1 = M2V2
where:
M1 = initial molarity of the concentrated solution
V1 = volume of the concentrated solution to be used
M2 = final molarity of the diluted solution
V2 = final volume of the diluted solution
Plugging in the given values:
M1 = 2.0 M
V1 = volume to be calculated (in mL)
M2 = 0.60 M
V2 = 275 mL
Solving for V1:
2.0 M * V1 = 0.60 M * 275 mL
V1 = (0.60 M * 275 mL) / 2.0 M
V1 = 82.125 mL
So, approximately 82.125 mL of the 2.0 M aluminum sulfate solution should be diluted to produce 275 mL of 0.60 M solution.
at 25°c, you have an aqueous solution for which [h3o+] = 1 x 10–5 m. what is the [oh–]?
At 25°c, you have an aqueous solution for which [H₃O⁺] = 1 x 10⁻⁵ m. The [OH-] of the solution is 1 x 10⁻⁴ M.
At 25°C, the [H₃O⁺] of an aqueous solution is 1 x 10⁻⁵ M. This means that the pH of the solution is 4.99. Since the pH of a solution is equal to -log[H₃O⁺], this means that the [OH⁻] of the solution must be equal to 1 x 10⁻⁴ M.
This is because the pH of a solution is simply the negative logarithm of the [H₃O⁺], and the [H₃O⁺] and [OH⁻] are always inverse of one another. This means that for every 1x10⁵ M of [H₃O⁺], there is 1 x 10⁻⁴ M of [OH-]. This is due to the fact that the product of the [H₃O⁺] and [OH-] will always equal 1 x 10¹⁴, which is the dissociation constant at 25°C.
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answer these questions fast
Answer:
1)0.5
3)1.7g
4)32g
5)1.12L
Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10^-4 M in hydroxide ion.
A) 4.00 × 10^-9 M
B) 4.00 × 10^-10 M
C) 4.00 × 10^-11 M
D) 5.00 × 10^-11 M
To calculate the hydronium ion concentration in an aqueous solution containing 2.50 × 10^-4 M hydroxide ion, we need to use the ion product of water (Kw) formula:
Kw = [H3O+] [OH-]
Kw is the ion product constant of water, which is equal to 1.00 × 10^-14 at 25°C. [H3O+] represents the concentration of hydronium ions, and [OH-] represents the concentration of hydroxide ions.
Given [OH-] = 2.50 × 10^-4 M, we need to find [H3O+]. Rearrange the formula:
[H3O+] = Kw / [OH-]
Plug in the values:
[H3O+] = (1.00 × 10^-14) / (2.50 × 10^-4)
[H3O+] = 4.00 × 10^-11 M
The hydronium ion concentration in the aqueous solution is 4.00 × 10^-11 M, which corresponds to answer choice C.
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what is the net ionic equation of:
cobalt(III) bromide and potassium sulfide yields cobalt(III) sulfide and potassium bromide
Answer:
[tex]\rm 2Co^{3+}+3S^{2-} \rightarrow Co_2S_{3\,(s)}[/tex]
Net Ionic Equation:If we write a balanced molecular equation as:
[tex]\\ \rm 2CoBr_{3\,(aq)}+3K_2S_{\,(aq)} \rightarrow Co_2S_{3\,(s)}+6KBr_{\,(aq)}\\[/tex]
Then the corresponding ionic equation is:
[tex]\rm 2Co^{3+}+6Br^-+6K^++3S^{2-} \rightarrow Co_2S_{3\,(s)}+6K^++6Br^-[/tex]
If you look carefully at the ionic equation, you may notice that the potassium ion and the bromide ion appear unchanged on both sides of the equation. When the two solutions are mixed, neither the [tex]\rm 6K^+[/tex] nor the [tex]\rm 6Br^-[/tex] ions participate in the reaction. They can be eliminated from the reaction.
These ions that are eliminated are known as spectator ions. A spectator ion is one that does not take part in the reaction, and are essentially, 'spectators'.
In the above reaction, the potassium ion and the bromide ion are both spectator ions. The equation can now be written without the spectator ions:
[tex]\rm 2Co^{3+}+3S^{2-} \rightarrow Co_2S_{3\,(s)}[/tex]
The net ionic equation is the chemical equation that shows only those elements, compounds, and ions that are directly involved in the chemical reaction.
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Which substance is least soluble at 60 C
1. KClO3
2. KNO3
3. NaNO3
4. KI
5. NH3
The Potassium chlorate, KClO₃ is a non-polar substance which is least soluble or less solubility in water at 60° C. So, option( 1) is right one.
In chemistry, solubility is the ability of a substance, say the solute to form a solution with another substance that is the solvent. The main property is that substances with similar polarities tend to be soluble in one another ("like dissolves like"). The degree to which a salt dissolves in water is called the it's solubility product constant. Now, here temperature = 60°C
Potassium nitrate KNO₃ is more-soluble than potassium chlorate KClO₃ due to on heating the saturated solution. At 60 degrees C, NaNO₃ has a solubility rate is 110 grams NaNO3 per 100 grams of water. So, it is more soluble than KNO₃. Now, NH₃ and KI both are polar in nature so, they are soluble in water. So, the least soluble is KClO₃.
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SOMEONE PLEASE I NEED HELP WITH CHEMISTRY
Draw a diagram for Copper(ll) nitrate & Cu(NO3)2 in a 250.0 mL of aqueous solution to show how to make the solution. Information to include…
Molarity of solution - 0.1176
She then draws 30.0 mL of the solution into a pipet. (MOLES OF CU(NO3)2 - 0.00352)
THEN : Mrs. Mandochino empties the 30.0 mL into an empty volumetric flask and fills it to the 240.0 mL mark with distilled water.
What is the molarity of this new solution?
Make sure to have 5 ACCURATE steps drawn. Your drawing should only be 1 picture but include 5 steps.
The molarity of the new solution prepared by Mrs. Mandochino is 0.0147 M.
How can 250.0 mL of a 0.1176M aqueous solution of Copper(ll) nitrate be prepared?To prepare 250.0 mL of an aqueous solution of 0.1176 M Copper(ll) nitrate, we determine the moles and then the mass of copper(ll) nitrate required.
Moles of copper(ll) nitrate required = molarity * Volume in liters
Moles = 0.1176 * 0.250
Moles = 0.0294 moles
Mass = moles * molar mass
Mass of copper(ll) nitrate required = 0.0294 * 187.5
Mass of copper(ll) nitrate required = 5.51 g
Therefore, 5.5 g of Copper(ll) nitrate is weighed into a 250.0 mL volumetric flask and some distilled water is used to dissolve the Copper(ll) nitrate.
Finally, the volumetric flask is filled up to the 250.0 mL mark with distilled water.
To find the molarity of the new solution, we can use the formula:
Molarity = initial volume * initial concentration / final volume
molarity = 30 * 0.1176 / 240
molarity = 0.0147 M
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