combination of the crystallization and washing steps in recrystallization can lead to a significant improvement in the purity of a solid compound.
The crystallization step of recrystallization removes impurities that are within the crystal lattice of the solid.
Recrystallization is a technique used to purify solid compounds that are contaminated with impurities. In this process, the solid compound is dissolved in a hot solvent, and the solution is allowed to cool slowly, which causes the compound to crystallize out of the solution. During this process, the impurities that are present in the compound are excluded from the growing crystals, as they cannot fit properly into the crystal lattice.
The washing step of recrystallization removes impurities that are on the surface of the solid. After the crystals have formed, they are typically washed with a small amount of a cold solvent, which helps to remove any remaining impurities that may be present on the surface of the crystals. This is done to further purify the crystals, as any impurities that are left on the surface of the crystals can affect their properties and purity.
Overall, the combination of the crystallization and washing steps in recrystallization can lead to a significant improvement in the purity of a solid compound.
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the prescribing clinician orders clindamycin 900 mg in 75 ml d5w over 30 minutes. drop factor is 15 gtt/ml. calculate the hourly flow rate in gtt/min. round to the nearest whole number. gtt/min
The flow rate is roughly 34 gtt/min per hour. A number of bacterial illnesses can be treated with the antibiotic clindamycin. It is a member of the group of medications known as lincosamide antibiotics.
We can use the following calculation to determine the hourly flow rate in gtt/min: The volume in gtt divided by the number of minutes makes up the hourly flow rate (gtt/min). Let's begin by determining the total volume in gtt: 900 mg = 0.9 g . 75 ml of D5W and 1 g of clindamycin equal 1 x 15 gtt. 0.9 g of clindamycin in 67.5 ml of D5W, or (75/1) times 0.9. 1012.5 gtt is equal to 67.5 ml of D5W multiplied by 15. The infusion will take 30 minutes, we also know that. The formula reads: hourly flow rate (gtt/min) = 1012.5 gtt / 30 min = 33.8 gtt/min after filling in the variables. The hourly flow rate, rounded to the nearest whole amount, is roughly 34 gtt/min.
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is the structure of c {4}h {6} rigid? (i.e. is it unable to rotate/move?) if not, which part of the molecule is not rigid? try to describe the shape of this molecule.
The chemical formula C{4}H{6} refers to butadiene, which is a linear molecule with two double bonds between the carbon atoms. The double bonds prevent free rotation around the carbon-carbon axis.
However, the molecule does have some flexibility and can undergo small vibrations due to the motion of its atoms, such as stretching or bending of the carbon-carbon bonds. These vibrations are common to all molecules and are due to the thermal energy of the system. In terms of shape, butadiene is a planar molecule, meaning that all of its atoms lie in the same plane. The molecule has a linear geometry with a bond angle of approximately 180 degrees between the two carbon-carbon double bonds. The two double bonds give butadiene a "zigzag" shape, with the two ends of the molecule bent slightly out of the plane to accommodate the sp{2}-hybridized orbitals of the carbon atoms that are bonded to hydrogen. Overall, the molecule can be described as having a flat, elongated shape.
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If it is in group _______ or group ________, the element ____________________________or is a ____________________________________________, then the compound is ionic.
If it is in group 1 or group 7 (or any group higher than 7), the element is a metal or is a non-metal, then the compound is ionic.
What is ionic ?Ionic chemistry is the study of how atoms and molecules interact with each other through the transfer of electrons. It involves the transfer of ions, which are atoms or molecules that have gained or lost an electron. These ions interact with each other to form ionic compounds, which are composed of ionic bonds. These bonds are formed by the attraction between the positive and negative charges of the ions.
This is because ions form when atoms of a metal lose electrons to a non-metal in order to achieve a full outer shell of electrons. Group 1 elements tend to lose one electron, while group 7 elements tend to gain seven electrons.
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sodium (na) starts with 11 protons and 11 electrons. when sodium donates an electron, group of answer choices the valence shell (second shell) becomes complete. sodium will be attracted to positively charged ions. the sodium ion becomes negatively charge. sodium will be able to form nonpolar covalent bonds.
With 11 protons and 11 electrons, sodium (Na) is created. The valence shell, or second shell, of sodium is finished when an electron is donated. Hence, option 1 is correct answer.
The distribution of electrons among the many possible orbitals on an element's atom is known as its "electron configuration." The designations of the orbitals s, p, d, and f refer to groups of lines that were first detected in the spectra of the alkali metals. The sharp, primary, diffuse, and fundamental line groupings are among them.
The s-orbital, p-orbital, d-orbital, and f-orbital are among them. the first shell is known as the K shell because: Spectroscopist Charles G. Barkla gave the electron shells their names. As he observed that the X-rays produce two different sorts of energy, he gave the innermost shell the name K shell. He gave type A, higher energy, and type B, lower energy X-ray as additional names for those two energies.
The electron configuration of Sodium is
Na₁₁ = 1s² 2s² 2p⁶ 3s¹
When the sodium ion denotes 1 electron to another atom, then the electron configuration becomes,
Na⁺ = 1s² 2s² 2p⁶
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0.92 lbm of water fills a container whose volume is 1.92 ft3. the pressure in the container is 100 psia. calculate the total internal energy and enthalpy in the container. use data from the steam tables. the total internal energy in the container is btu. the enthalpy in the container is btu.
The total internal energy in the container is 329.77 Btu and the enthalpy in the container is 385.14 Btu.
Using the steam tables, we can determine the specific volume of water at the given pressure and temperature. The specific volume of water is 0.01658 [tex]ft^3/lbm[/tex].
The mass of water in the container is 0.92 lbm, so the total volume of the water is:
V = m/v = 0.92 lbm / 0.01658 [tex]ft^3/lbm[/tex] = [tex]55.539 ft^3[/tex]
Assuming the water is at saturation, we can find the total internal energy and enthalpy by using the values in the steam tables for saturated water at 100 psia.
From the steam tables, the total internal energy of saturated water at 100 psia is 358.05 Btu/lbm, so the total internal energy in the container is:
U = m * u = 0.92 lbm * 358.05 Btu/lbm = 329.77 Btu
From the steam tables, the enthalpy of saturated water at 100 psia is 419.02 Btu/lbm, so the enthalpy in the container is:
H = m * h = 0.92 lbm * 419.02 Btu/lbm = 385.14 Btu
Therefore, the total internal energy in the container is 329.77 Btu and the enthalpy in the container is 385.14 Btu.
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Can someone help me?
What's the Claim, evidence, and reasoning for this
There are about 6 beakers and the beakers are about a length of 225 kilometers; a colorless hydrogen pouring it to beaker number 2 and then a color change occurred to purple or pinkish then it’s going to pour it to the third beaker and what happened is the color changed back to colorless; after that pouring the third beaker to the fourth, the colorless hydrogen turned to something like a bubbling dancing around the solution and it wasn’t kind of clear and after that; pouring fourth to the fifth, the substance of the hydrogen were very cloudy it was also not very clear and lastly from fifth to sixth; the color change to pinkish and not clear.
Claim: The color of the hydrogen changed from colorless to pinkish when poured from the fifth beaker to the sixth.
Evidence: The substance of the hydrogen changed from colorless to a bubbling dancing around the solution to cloudy and finally to pinkish when poured from the fifth beaker to the sixth.
Reasoning: The change in the color of the hydrogen can be attributed to the differences in the chemical makeup of the beakers. The chemical makeup of the fifth beaker was likely more reactive than that of the fourth, resulting in a cloudy mixture when the hydrogen was poured into it. This reaction created a new compound which was then poured into the sixth beaker, resulting in the hydrogen changing color to pinkish.
What is compound?Compound in chemistry is a substance composed of two or more elements chemically combined in a fixed ratio.
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the free-base form of cocaine has a solubility of 1.00 g in 6.70 ml ethanol (ch3ch2oh) . calculate the molarity of a saturated solution of the free-base form of cocaine in ethanol. express your answer to three significant figures and include the appropriate units.
The molarity of a saturated solution of the free-base form of cocaine in ethanol is 0.49M if it has a solubility of 1.00 g in 6.70 ml ethanol.
Given the mass of free-base form of cocaine = 1g
The volume of ethanol = 6.70mL
Molarity is calculated as moles of solute divided by the volume of solution
We know that Volume of solute + Volume of solvent gives Volume of solution.
Moles of solute cocaine ([tex]C17H21NO4[/tex]) = mass of cocaine/molar mass
moles = 1/303.353 = 0.00330 mol [tex]C17H21NO4[/tex]
Volume of solution = 6.7/1000 = 0.0067 L
Then the molarity = 0.00330/0.0067 = 0.49 mol/L or 0.49 M
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in water, 1 mol of al(clo3)3 (aq) will dissociate into which ions?
In water, 1 mol of Al(ClO₃)₃ (aq) will dissociate into two moles of Al³⁺ ions and three moles of ClO³⁻ions.
In water, 1 mol of Al(ClO₃)₃ (aq) will dissociate into the following ions: Al³⁺and ClO³⁻.
When Al(ClO₃)₃ is dissolved in water, it will dissociate into its constituent ions. The Al³⁺ ion will separate from the three ClO³⁻ ions. This process is known as dissociation and is a common occurrence when ionic compounds are dissolved in water.
The resulting solution will contain Al³⁺ and ClO³⁻ions that are free to move around and interact with other ions in the solution. In summary, 1 mol of Al(ClO₃)₃ (aq) will dissociate into 1 mol of Al³⁺ ions and 3 mol of ClO³⁻ ions in water.
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describe what you would do, experimentally, to the mixed fractions in order to increase your overall percent yield g
Generally, percent Yield is defined as the actual yield divided by the theoretical yield multiplied with 100. There are lots of reasons why the actual yield of a chemical reaction may be less than the theoretical yield.
The following steps should be taken to increase the percent yield of a chemical reaction which are noted below.
Reagents should be added dropwise if necessary.Continuously stirring should be done throughout the chemical reaction. The temperature of reaction and liquid reagents should be carefully kept at the correct level during addition and reaction.Reaction should be monitored carefully throughout the experiment, so that the observations would be accurate.Learn more about percent yield from the link given below.
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Select the statement which does NOT apply to an ideal gas.Question 22 options:A) There are no attractive forces between the gas molecules.B) There are strong repulsive forces between the gas molecules.C) The volume occupied by the molecules is negligible compared to the container volume.D) The gas behaves according to the ideal gas equation.E) The average kinetic energy of the molecules is proportional to the absolute temperature.
B) There are strong repulsive forces between the gas molecules. Strong repelling forces exist between the gas molecules, which do not exist in an ideal gas.
The statement in option (B), "There are significant repulsive interactions between the gas molecules," DOES NOT apply to a perfect gas. There are no substantial intermolecular forces, either attracting or repulsive, between the gas molecules in a ideal gas. Because of this, gas molecules may travel unimpeded and independently of one another, clash with one another and with container walls, and do so only through elastic collisions. Other possibilities include having a minimal molecular volume (C), adhering to the ideal gas equation (D), and having an inverse connection between average kinetic energy and absolute temperature (E).
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chemistry, can someone walk me trough the steps and what i need to do, to solve this please! Along with the anserw would help so much!
A mole of Chromebooks lined up end to end would encircle the moon approximately 1.59 x 10^16 times.
What is the length of a standard-size school Chromebook?The length of a standard-size school Chromebook is 11.6 inches.
To determine the number of times a mole of Chromebooks lined up end to end would encircle the moon, we need to first convert the length of one Chromebook into meters and then multiply that by Avogadro's number, which is the number of particles in a mole.
One Chromebook is 11.6 inches long, which is approximately 0.2946 meters. Avogadro's number is 6.022 x 10^23.
So, the total length of a mole of Chromebooks lined up end to end would be:
0.2946 meters * 6.022 x 10^23 = 1.75 x 10^24 meters
The circumference of the moon is approximately 10,917 kilometers, which is equal to 10,917,000 meters.
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Suppose you have a holiday celebration and over the evening six logs are burned in a fireplace. All thats left is ashes, but you know there are just as many atoms as there were before. how do you know that
The ashes contain chemicals which have alkaline nature and the range of pH is from 10 to 12. Ashes are made up of atoms of different elements.
What is ashes?Ashes are defined as something which is left after burning or destroying some substances by fire. It is a greyish-white to black powder residue left when something is burned.
In the branch of analytical chemistry ashes are generally used to identify the mineral and metal content of the chemical samples. Ash is the non-liquid residue.
Ashes contain many atoms of the elements like carbon, calcium, magnesium, potassium, aluminium, phosphorous, etc.
Thus ashes are not remnants, it contains many atoms.
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What kind of reaction is S8 + 24F2 --> 8SF6
The qualities/quantities of a gas are independent of one another.
True
False
Explanation:
True. They may both be properties of a gas but they are independent of each other since the pressure of a gas may vary without changing the temperature or volume (or any other properties).
Answer:
True
Explanation:
The statement "The qualities/quantities of a gas are independent of one another" is True. This means that a change in one property of a gas, such as pressure, volume, or temperature, does not affect the other properties. This is one of the basic assumptions of the ideal gas law, which states that the pressure, volume, and temperature of a gas are proportional to one another under certain conditions.
For example, when the volume of a gas is increased, its pressure decreases, and when its temperature is increased, its pressure also increases. These changes in properties are independent of one another, and can be described by the mathematical relationships described by the ideal gas law.
ALLEN
when magnesium chloride (MgCl2) dissolves in water, it dissociates into magnesium ions and chloride ions. how many chloride ions form when a 42.66 gram sample of magnesium chloride is dissolved in water?
a) 2.70 x 10^23
b) 8.09 x 10^23
c) 5.39 x 10^23
d) 2.69 x 10^24
Answer:
A 42.66-gram sample of magnesium chloride will dissolve in water to produce 0.448 moles of ions (option A).
How many moles are there, exactly?
In response to this query, magnesium chloride (MgCl2) separates into magnesium ions and chloride ions when it dissolves in water.
Mg2+(aq) + Cl MgCl2(aq) (aq)
However, if a 42.66-gram sample of magnesium chloride dissolves in water, the number of moles of the ionic products will be 42.66 g/molecular mass of MgCl2.
MgCl2 has a molecular weight of 95.3 g/mol.
mol = 42.66g x 95.3g/mol = 0.448mol
Therefore, when a 42.66-gram sample of magnesium chloride is dissolved in water, 0.448 moles of ions will result.
by adding antifreeze to the water in the radiator of a car, you: select one: a. lower the freezing point of liquid in the radiator b. raise the boiling point of liquid in the radiator c. both lower the freezing point of liquid in the radiator and increase its boiling point d. none of these
By adding antifreeze to the water in the radiator of a car, you can lower the freezing point of the liquid in the radiator. Therefore, option (a) is correct.
Antifreeze is a solution typically consisting of ethylene glycol or propylene glycol mixed with water, which is added to the cooling system of a car to prevent the engine from overheating or freezing. When antifreeze is added to water, it lowers the freezing point of the mixture, making it less likely to freeze in cold temperatures. This is due to the fact that the antifreeze molecules interfere with the formation of ice crystals in the mixture.
On the other hand, adding antifreeze to the water does not raise the boiling point of the mixture. While antifreeze does increase the boiling point of pure water, the effect is relatively small and is offset by the fact that the mixture already has a higher boiling point due to the dissolved antifreeze.
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CH₂O
Empirical
Formula Mass
Answer: 32 atomic mass units
Explanation:
carbon is 14
hydrogen is 1 each
oxygen is 16
a three-dimensional space where an electron spends most of its time with at least 3 other electrons is called ?
A three-dimensional space where an electron spends most of its time with at least 3 other electrons is called an electron orbital.
An orbital is a region of space around the nucleus where an electron is likely to be found. Orbitals are described by a set of quantum numbers that define the energy, shape, and orientation of the orbital. Each orbital can hold a maximum of two electrons with opposite spins, so when there are at least 3 other electrons in the same space, they are occupying multiple orbitals.
Each orbital is associated with a specific energy level and can hold a maximum of two electrons. There are different types of orbitals, including s, p, d, and f orbitals, each with a different shape and size. The arrangement of electrons in an atom's orbitals determines the chemical properties of the atom.
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Question 1 of 5
Which statement correctly compares the weight and the mass of an object?
OA. Both its weight and its mass change based on location.
OB. Neither its mass nor its weight changes based on location.
OC. Its weight changes based on location, but its mass stays the
same.
OD. Its mass changes based on location, but its weight stays the
same.
SUBMIT
Its weight changes based on location, but its mass stays the same.
Which statement correctly compares the weight and the mass of an object?Mass is a measure of the quantity of matter present in an object and therefore, it is always the same. However, the weight of an object differs as the gravitational force on it changes. A Mass indicates the density of an object, while weight specifies its volume.
The dissimilar between mass and weight is that mass is the amount of matter in stuff, while weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the total matter in a body. Mass is denoted using m or M.
So we can conclude that The distinction between Mass and Weight is Mass is a computation of Inertia and Weight is a consideration of Force.
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Aqueous barium nitrate reacts with aqueous iron (Il) sulfate
Write the
Balanced equation
Complete Ionic
Net ionic
Answer:
Balanced equation:
The balanced chemical equation for the reaction between aqueous barium nitrate and aqueous iron(II) sulfate is:
Ba(NO3)2(aq) + FeSO4(aq) → BaSO4(s) + Fe(NO3)2(aq)
Complete Ionic equation:
The complete ionic equation for the reaction between aqueous barium nitrate and aqueous iron(II) sulfate is:
Ba^2+(aq) + 2NO3^-(aq) + Fe^2+(aq) + SO4^2-(aq) → BaSO4(s) + Fe^2+(aq) + 2NO3^-(aq)
Net Ionic equation:
The net ionic equation is obtained by cancelling out the spectator ions (ions that appear on both sides of the equation and do not participate in the reaction) from the complete ionic equation. The spectator ions in this case are Ba^2+ and 2NO3^-. The net ionic equation for the reaction between aqueous barium nitrate and aqueous iron(II) sulfate is:
Fe^2+(aq) + SO4^2-(aq) → BaSO4(s)
What law states that the volume of a gas is directly proportional to the number of moles of gas?
The law that states that the volume of a gas is directly proportional to the number of moles of gas at constant temperature and pressure is known as Avogadro's Law.
Avogadro's Law: The Relationship Between Volume and Number of Moles of GasAvogadro's Law states that the volume of a gas is directly proportional to the number of moles of gas at constant temperature and pressure. This law was first proposed by Amedeo Avogadro, an Italian scientist, in 1811. According to this law, if the amount of gas in a container is increased while the temperature and pressure remain constant, the volume of the gas will also increase in proportion to the number of moles of gas present. Conversely, if the amount of gas is decreased, the volume will also decrease proportionally. Avogadro's Law is based on the fact that the number of gas molecules in a given volume of gas is directly proportional to the number of moles of gas present. This law is an important concept in the study of gases and is used in many areas of science, including chemistry, physics, and engineering. It is also essential in the development of the ideal gas law, which describes the behavior of gases under various conditions.
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what is the polarity of slime molecules
Slime is a non-Newtonian fluid and does not have a molecular structure that can be considered polar or non-polar. The term "polarity" typically refers to the distribution of electrical charge within a molecule. In the case of slime, the material is made up of polymer molecules, which are long chains of repeating units. These polymer molecules interact with each other through hydrogen bonding, which gives the material its unique properties such as being a non-Newtonian fluid. However, these interactions are not based on polarity, so it is not appropriate to describe slime as being polar or non-polar.
Answer:
The polarity of slime molecules depends on the specific type of slime. There are many different types of slime, each made up of different types of molecules.
For example, if we consider a typical type of slime made from polyvinyl alcohol (PVA), the polarity of the PVA molecules will depend on their molecular structure and the type of bonding between the atoms. PVA is a synthetic polymer made up of repeating units of vinyl alcohol, which has a polar hydroxyl group (-OH). As a result, PVA is considered to be a polar molecule.
However, the overall polarity of a slime made from PVA will also depend on the other ingredients that are present, such as borax, which is often used as a cross-linking agent to form the slime. The overall polarity of the slime will also depend on the conditions it is in, such as the temperature, pH, and the presence of other substances that could affect the polarity of the slime.
In summary, the polarity of slime molecules can be complex and depends on the specific type of slime, the ingredients that make it up, and the conditions it is in.
Explanation:
Just tell me if you kinda confuse
ALLEN
Which units express specific heat capacity? J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)
The units that express specific heat capacity are J/(g°C), J/(gK), cal/(g°C), and cal/(gK). The J stands for joules, which is the SI unit of energy, g stands for gram, which is the SI unit of mass, °C stands for degrees Celsius, and K stands for Kelvin.
The cal stands for calorie, which is a non-SI unit of energy. Specific heat capacity is the amount of energy required to increase the temperature of a unit mass of a substance by one degree. It is usually expressed in joules per gram degree Celsius (J/g°C) or calories per gram degree Celsius (cal/g°C). The specific heat capacity of a substance is related to its molecular structure and the intermolecular forces that exist between its molecules. Substances that have strong intermolecular forces, such as those composed of molecules with multiple polar bonds, typically have higher specific heat capacities than substances with weak intermolecular forces, such as those composed of molecules with few or no polar bonds.
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a closed piston-cylinder device contains 5l of water vapor are initially at 300 kpa and 200 deg c. the water undergoes some process taking it to a final state of 175 kpa and a quality of 50%. determine the change of enthalpy between the initial and final state
The change in enthalpy (Δh) between the initial and final state is [tex]-48270 kJ[/tex]
The change in enthalpy (Δh) between the initial and final state can be calculated using the following equation:
Δ[tex]h = m (h2 - h1)[/tex]
where m is the mass of water vapor, h1 is the enthalpy of the initial state and h2 is the enthalpy of the final state.
Since the initial state is at 300 kPa and 200°C, the enthalpy of the initial state (h1) can be calculated using the steam tables. From the steam tables, the enthalpy of the initial state (h1) is 2760 kJ/kg.
The final state is at 175 kPa and a quality of 50%. The enthalpy of the final state (h2) can also be calculated using the steam tables. From the steam tables, the enthalpy of the final state (h2) is 1703 kJ/kg.
Now, the mass of water vapor (m) in the closed piston-cylinder device can be calculated using the ideal gas law equation.The following equation is the ideal gas law:
[tex]PV = mRT[/tex]
where R is the gas constant, T is the temperature, V is the volume, m is the mass, and P is the pressure.
Since the volume of the closed piston-cylinder device is 5 liters and the temperature is 200°C, the mass of the water vapor (m) can be calculated as follows:
[tex]m =\frac{ (300 kPa * 5 liters)}{ (0.287 *323.15 K)}[/tex]
Therefore, the mass of the water vapor (m) is 41.6 kg.
Finally, the change in enthalpy (Δh) between the initial and final state can be calculated using the equation given above. Thus,
Δ[tex]h = 41.6 (1703 - 2760) = -48270 kJ[/tex]
Therefore, the change in enthalpy (Δh) between the initial and final state
is [tex]-48270 kJ[/tex].
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the initial concentration of a reactant in a first order reaction is 0.860 m. what will be its concentration after 4 half-lives have passed?
concentration of the reactant after 4 half-lives have passed will be 0.0538 M.
In a first-order reaction, the rate of the reaction is directly proportional to the concentration of the reactant. The formula to calculate the concentration of a reactant after a certain number of half-lives is:
C_final = C_initial * (1/2)^n
Where C_initial is the initial concentration, n is the number of half-lives, and C_final is the final concentration.
For a first-order reaction, the half-life is constant and can be calculated using the following formula:
t1/2 = 0.693/k
Where k is the rate constant.
If 4 half-lives have passed, the concentration of the reactant will be:
C_final = C_initial * (1/2)^n
C_final = 0.860 M * (1/2)^4
C_final = 0.0538 M
Therefore, the concentration of the reactant after 4 half-lives have passed will be 0.0538 M.
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for the following reaction, 27.8 grams of calcium hydroxide are allowed to react with 22.7 grams of hydrochloric acid. what is the maximum amount of calcium chloride that can be formed? mass
The limiting reactant is calcium hydroxide. The maximum amount of calcium chloride that can be formed is 44.6 grams.
The balanced chemical equation for the reaction between calcium hydroxide and hydrochloric acid is:
Ca(OH)2 + 2HCl → CaCl2 + 2H2O
To determine the maximum amount of calcium chloride that can be formed, we need to identify the limiting reactant. The limiting reactant is the reactant that is completely consumed in the reaction, thus limiting the amount of product that can be formed.
We can determine the limiting reactant by calculating the amount of product that can be formed from each reactant and comparing the results.
First, let's calculate the amount of calcium chloride that can be formed from 27.8 grams of calcium hydroxide. We'll use the molar mass of calcium hydroxide to convert grams to moles, and then use the mole ratio between calcium hydroxide and calcium chloride to calculate the amount of calcium chloride that can be formed:
27.8 g Ca(OH)2 × (1 mol Ca(OH)2 / 74.093 g) × (1 mol CaCl2 / 1 mol Ca(OH)2) × (110.98 g CaCl2 / 1 mol CaCl2)
= 44.6 g CaCl2
Next, let's calculate the amount of calcium chloride that can be formed from 22.7 grams of hydrochloric acid. We'll use the molar mass of hydrochloric acid to convert grams to moles, and then use the mole ratio between hydrochloric acid and calcium chloride to calculate the amount of calcium chloride that can be formed:
22.7 g HCl × (1 mol HCl / 36.46 g) × (1 mol CaCl2 / 2 mol HCl) × (110.98 g CaCl2 / 1 mol CaCl2)
= 77.5 g CaCl2
From the calculations above, we can see that the amount of calcium chloride that can be formed from 27.8 grams of calcium hydroxide is 44.6 g, while the amount that can be formed from 22.7 grams of hydrochloric acid is 77.5 g. Therefore, the limiting reactant is calcium hydroxide.
The maximum amount of calcium chloride that can be formed is 44.6 grams.
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a kilocalorie of heat is required to raise the temperature of:____.
One kilogramme of water needs one kilocalorie (kcal) of heat to raise its temperature by one degree Celsius (°C). It takes 4.18 kilocalories of heat to raise the temperature of 1 kilogramme of water by 1 degree Celsius.
As a result of a temperature difference, energy can be transferred from one body to another in the form of heat. It is a cornerstone of thermodynamics and is essential to many organic and synthetic processes. Heat is a form of energy that can be transmitted through radiation, conduction, and convection. Heat is created when particles in matter move about. In daily life, we encounter heat in the form of hot drinks, heated spaces, and warmth from the sun. Heat is employed in industry for a number of processes, including manufacturing, power generation, and cooking. Other scientific fields that depend on heat include physics, chemistry, and engineering.
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a sample of oxygen gas occupies a volume of.200 l at 60.0 and 500 mmhg of pressure what will what will its volume be in l at stp
The volume of sample at STP is 116.3L when a sample of oxygen gas occupies a volume of.200 l at 60.0 and 500 mmHg of pressure.
Given the initial volume of oxygen sample (V1) = 200L
The initial temperature (T1) = 60° = 60 + 273 = 333K
The initial pressure of sample (P1) = 500mmHg = 0.657895atm
The pressure at STP (P2) = 1 atm
The temperature at STP (T2) = 25 + 273= 298K
The volume at STP = V2
We know that from ideal gas law equation: PV = nRT such that at n is constant: P1V1/T1 = P2V2/T2. Then,
0.65 x 200/333 = 1 x V2/298
V2 = 116.3L
Hence the volume of sample at STP is = 116.3L
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Please explain how they got these answers?? Like step by step if u can. Please hurryyyyy 50 points
The frequency of a microwave that has a wavelength of 8.72 × 10-¹⁰m is 3.44 × 10¹⁷Hz.
How to calculate frequency?Wavelength is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency.
The wavelength, λ, of a substance can be calculated as follows:
λ = v/f
According to this question, a microwave possesses a wavelength of 8.72 × 10-¹⁰m. The frequency can be calculated as follows:
f = v/λ
f = 3 × 10⁸ ÷ 8.72 × 10-¹⁰
f = 3.44 × 10¹⁷Hz
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in order to react safely and appropriately during a vehicle failure, the motorist needs to understand the following: a) what has happened? b) what are the correct procedures to follow? c) how are these procedures immediately and successfully implemented? d) all of the above
The answer is that in order to react safely and appropriately during a vehicle failure the motorist need to understand is stated in option d, that says, all of the above.
During a vehicle failure the motorist should react safely and appropriately in order to deal with the situation in a suitable and safe manner.
The first important thing is that the motorist heads to understand what has happened and what are the next correct procedures that he should follow and finally the motorist should also understand that how these procedures should be implemented immediately and successful it too.
As we can see that all of these three things are very important in order to react safely, we can conclude that the answer to your question is option d. all of the above.
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