5 l of a 15% saline solution was mized with 2 l of a 50% saline solution what is the concentration of the mixture
Answers
The concentration of the mixture is 25%.
The amount of solute contained in a specific amount of solution is the substance's concentration. The number of moles of solute in 1 L of solution, or molarity, is used to express concentrations. Concentration is the abundance of a constituent divided by the total volume of a mixture.
Given in the question 5L of 15% saline solution was mixed with 2L of a 50%
where \(V_{1} = 5L\) and \(V_{2} = 2L\).
Using the formula: \(\frac{V_{1}\times15\% + V_{2}\times50\% }{V_{1}+V{2}}= Mixture\%\)
=> \(\frac{5\times15\% + 2\times50\% }{5+2}= Mixture\%\)
=>\(\frac{\frac{3}{4} + 1}{7}\) = \(\frac{100}{4}\) = 25% Mixture
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Related Questions
How many atoms are in 3.5 moles of carbon?
Answers
Answer:
Explanation: There are 5.418⋅1024 atoms in 3 moles of Carbon Dioxide. Explanation: 1 Mole is 6.02⋅1023 molecules. Therefore 3 Moles of Carbon ...
As in 1 mole there are 6.022 * 10^23 atoms.
So in 3.5 mole of carbon there are 21.077 * 10^23 atoms.
What do we should know about mole concept?
The mole concept is a convenient way to describe a substance's volume. The numerical magnitude and the units in which it is expressed are the two components of any measurement. When a ball's mass is measured to be 2 kilograms, for instance, the magnitude is "2" and the unit is "kilogram."Even one gram of a pure element contains a significant number of atoms when dealing with particles at the atomic (or molecular) level. The mole concept is frequently used in this context. It focuses primarily on the "mole" measurement, which represents a count of a very large number of particles.A mole is the amount of a substance that contains precisely 6.02214076 * 10^23 "elementary entities" of the given substance, as defined in the field of chemistry.Every substance has the same number of atoms or other particles in a mole. The mole and an element's mass are related in the following ways. There are 6.02214076 * 10^23 carbon-12 atoms in one mole, giving it a mass of 12 grams. By definition, one mole of oxygen has the same number of atoms as one mole of carbon-12, but it weighs 15.999 grams. As a result, oxygen has more mass than carbon. Weights of molecules or formulas can be accounted for using this logic as well.
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Answer whats on the image PLEASE
Answers
Answer:
1.97201398 g
Explanation:
Multiply the theoretical yield by the percent yield. Don't forget to move the decimal over 2 on the percent before multiplying or to use the percent button on your calculator.
How does viscosity affect boiling point?
A. Higher viscosity = Lower boiling point
B. Lower viscosity = Higher boiling point
C. Higher viscosity = Higher boiling point
D. Viscosity has no effect on boiling point
Answers
PLEASE HELP!
what are the steps that occur during the combustion of hydrogen?
Answers
Answer:
In flame of pure hydrogen burning in air, the hydrogen (H2) reacts with oxygen (O2) to form water (H2O) with the release of energy. In atmospheric air rather than pure oxygen, hydrogen combustion may yield a small amount of nitrogen oxides with the water vapor. The energy released allows hydrogen to be used as a fuel.
Explanation:
Here are the steps that occur during the combustion of hydrogen; Initiation, Propagation, Completion, and Energy Release.
The combustion of hydrogen involves a chemical reaction with oxygen in the air, resulting in the release of energy in the form of heat and light.
Initiation: The combustion process begins by supplying energy to break the initial bonds in the reactant molecules. In the case of hydrogen combustion, heat or an external ignition source is provided to break the diatomic hydrogen molecules (H₂) into individual hydrogen atoms (H).
H₂ → 2H
Propagation: Once the hydrogen molecules are dissociated into hydrogen atoms, they react with oxygen (O₂) molecules from the air. This reaction occurs in a chain reaction mechanism involving three steps: initiation, propagation, and termination.
Initiation: Hydrogen atoms react with oxygen molecules to form hydrogen peroxide (H₂O₂) and hydroxyl radicals (OH).
H + O₂ → HO₂
H + HO₂ → H₂O₂
Propagation: The hydroxyl radical (OH) reacts with hydrogen molecules to form water vapor (H₂O) and release heat.
OH + H₂ → H₂0 + H
Termination: The chain reaction terminates when two radicals combine to form stable products.
H + OH → H₂0
Completion: The chain reaction continues as long as there is a sufficient supply of hydrogen and oxygen. The hydrogen atoms released in the propagation step can initiate further reactions with more oxygen molecules, leading to the complete combustion of hydrogen to form water vapor (H₂O).
H₂ + O₂ → H₂O
Energy Release: The combustion of hydrogen is an exothermic reaction, which means it releases energy in the form of heat and light. This energy is responsible for the heat and light produced by a burning hydrogen flame.
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Hmmm help I’ll give 100 points thank youu!
Answers
The table that matches the diagram is the third answer.
It says negative particles are red. Electrons are negative particles, and the third answer is the only answer that matches Electrons with the color red. So it is the third answer.
Hope It Helps!
Answer:
The table that matches the diagram is the third answer.
It says negative particles are red. Electrons are negative particles, and the third answer is the only answer that matches Electrons with the color red.
of the molecules below, only is nonpolar. question 3 options: a) nf3 b) if3 c) bf3 d) brcl3 e) pbr3
Answers
The molecule BF3 is non-polar.
The BF3 molecule has a symmetrical trigonal planar geometry, like the SO3 molecule.In such a structure, the resultant moment of any two BF dipoles is equal in magnitude but opposite in direction to the moment of the third one.So, the net dipole moment of the BF3 molecule is zero, and it is non-polar. NF3 has not the dipole moment zero so it's polar.BrCl3,PBr3 has dipole moment so its polar.The molecule is polar. The polarity of a molecule depends on the dipole moment. If it has dipole moment, it is polar and if it contains no dipole moment so it is non-planar.To learn more about dipole moment visit:
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Chemists can identify the composition of some unknown salts by conducting a flame test. When potassium salts are heated in a flame, a purple color is observed.
This is due to the movement of electrons between energy levels. What is the electron configuration of a potassium atom at ground state?
answer choices
1s2; 2s2; 2p6; 3s2; 3p6; 4d1
1s2; 2s2; 2p6; 3s2;3p6; 3d1
1s2; 2s2; 2d6; 3s2; 3d6; 4s1
1s2; 2s2; 2p6; 3s2; 3p6; 4s1
Answers
The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.
What is an electronic configuration?The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².
The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.
The total number of electrons occupied in the given electronic configuration 1s²2s²2p⁶3s²3p⁶4s¹ is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.
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difference between very short and Short period in modern periodic table
Answers
Answer:
There are three types of periods in the modern periodic table: very short periods, short periods, and long periods.
Very short period contains only two elements, Hydrogen and Helium. These elements have only one shell, and their electrons can only occupy the s-orbital.Short periods contain eight elements. The first two elements in a short period can only occupy the s-orbital, while the remaining six elements can also occupy the p-orbital.Long periods contain 18 elements. The first six elements in a long period can only occupy the s- and p-orbitals, while the remaining 12 elements can also occupy the d-orbital.The difference between very short periods and short periods is the number of elements they contain. Very short periods only contain two elements, while short periods contain eight elements. The difference between short periods and long periods is the number of orbitals that can be occupied by electrons in each period. Short periods can only have electrons in the s- and p-orbitals, while long periods can also have electrons in the d-orbital.
Here is a table summarizing the differences between very short periods, short periods, and long periods:
Period type: Very short periodNumber of elements: 2
Orbitals that can be occupied by electrons: s-orbital only.Period type: short period
Number of elements: 8
Orbitals that can be occupied by electron: s- and p-orbitals.Period type: long period
Number of element: 18
Orbitals that can be occupied by electrons: s-, p-, and d-orbitals
Consider the enlargement of the triangle with a scale factor of 8 2 triangles have corresponding side lengths of 8 centimeters and 64 centimeters. Side A corresponds with a side with length of 2 centimeters. Side A = 2(8) = 16 cm. What is the length of side B?
Answers
Answer:
8
Explanation:
Answer:
40
Explanation:
Ed 2020
A solution of NaCl was prepared in the following manner: 0.0842 g of NaCl is massed out on an analytical balance. The solid is transferred to a 25.00 mL volumetric flask. Deionized water is added to the flask such that the bottom of the meniscus is at the line. A 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask using a volumetric pipet and diluted to volume. 6. Calculate the concentration of NaCl in the resulting solution in mg/L NaCl. (answer = 67.4 mg/L) 7. Calculate the concentration of NaCl in the resulting solution using propagation of error through the calculation. Use the manufacturer's tolerance values as the absolute error. The tolerances can be found in Chapter 2 of the Harris text. Assume a Class 1 balance and Class A glassware. Treat the tolerances as random error. (answer = 67.4+0.4 mg/L) 8. Identify 2 possible sources of random (indeterminate) error. Identify 2 possible sourses of systematic (determinate) error.
Answers
Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl
To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7. Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.
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Question 19 Marks: 1 To mix acid and water, alwaysChoose one answer. a. add water to acid b. add acid to water c. add soda ash to acid d. stir while pouring water into the acid
Answers
To mix acid and water safely, always choose option b: add acid to water. This prevents excessive heat release and potential splashing, ensuring a safer mixing process.
When mixing acid and water, it is important to always add acid to water slowly while stirring continuously. This method helps prevent the mixture from splashing and causing a dangerous reaction. Never add water to acid as this can cause the mixture to heat up quickly and potentially cause an explosion.
Always go with option B, adding acid to water, to safely combine acid and water. This ensures a safer mixing process by preventing excessive heat release and consequent splashing.
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in this type of bonding, electrons are captive to atoms. in order to get electrical conductivity, we must move charged atoms, not just free electrons.
Answers
The type of bonding described is ionic bonding. In ionic bonding, electrons are transferred from one atom to another, resulting in the formation of ions with opposite charges. Ionic bonding is a type of chemical bonding that occurs between atoms with a large difference in electronegativity.
In ionic bonding, one atom, known as the cation, loses electrons to another atom, called the anion, which gains those electrons. This transfer of electrons results in the formation of positively charged cations and negatively charged anions. The electrons are tightly held by the ions and are not free to move throughout the material. Therefore, in order to achieve electrical conductivity in ionic compounds, it is necessary to move charged atoms (ions) rather than free electrons. The ions can move in response to an electric field, carrying the charge and enabling the flow of electricity.
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What does EtOH stand for?
Answers
Answer:
EtOH stands for ethyl alcohol, which is the type of alcohol found in alcoholic beverages such as beer, wine, and spirits. It is a central nervous system depressant that can cause a range of effects, from mild relaxation to severe impairment of cognitive and motor functions. EtOH is often used in the medical and research fields as a short notation for Ethanol.
EtOH is the chemical label or acronym for ethyl alcohol (ethanol). EtOH refers to the kind of alcohol that can be found in alcoholic beverages like wine, beer, and spirits.
It is a depressant of the central nervous system that can have a variety of effects, ranging from mild relaxation to severe cognitive and motor impairment. In the medical and research industries, EtOH is frequently used as a short notation for ethanol.
Why do we use EtOH?It is used in the production of other chemicals, as a solvent, and in alcoholic beverages. Ethanol is a colorless, somewhat toxic substance. Solutions of ethanol and water that contain more than 50% ethanol are extremely flammable. The most well-known use of ethanol is as alcohol in alcoholic beverages.
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carbon-14 has a half life of 5730 years. after 17,190 years, only 3g remains. what was the mass of the original sample
Answers
The mass of the original sample was 24 grams of a carbon-14 has a half life of 5730 years. after 17,190 years, only 3g remains.
Carbon-14 has a half-life of 5730 years, meaning that after that amount of time has passed, half of the original amount of carbon-14 in a sample will have decayed. After another 5730 years, half of the remaining carbon-14 will have decayed, leaving only 25% of the original amount.
So, after 17,190 years (3 half-lives), only 3g of carbon-14 remains. To find the original mass, we can work backwards using exponential decay.
Starting with 3g, we know that this is 25% of the original amount (since 17,190 years represents 3 half-lives). So, we can set up the equation:
3g = 0.25x
Where x is the original mass of the sample.
Solving for x, we get:
x = 3g / 0.25 = 12g
But wait - this is only the mass of the carbon-14 in the sample. To find the total mass of the sample, we need to consider that carbon-14 makes up only a small fraction of the overall mass of an object. Specifically, carbon-14 makes up about 1 part per trillion of the Earth's carbon.
So, we can set up another equation:
x / (1 trillion) = m
Where m is the total mass of the sample. Solving for m, we get:
m = x * (1 trillion) = 12g * (1 trillion) = 12,000,000,000g
Or 12 billion grams.
So, the conclusion is that the original mass of the sample was approximately 12 billion grams, or 12 million kilograms.
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Given the equation
N2(g) +3H2 (g)--> 2NH3 (g)
1 mole of N2 gas is needed to completely react with 3 moles of H2 gas.
How many molecules of H2 gas are needed?
Answers
Answer:
numbers of molecules = 3×6.023×10-23
a substance that can be broken down into simpler substances is called ____
Answers
The term that describes a substance that can be broken down into simpler substances is called a compound. A compound is a substance that is made up of two or more elements that are chemically combined in a fixed proportion.
Compounds are substances that are formed by the chemical combination of two or more elements in a particular ratio. Compounds, unlike mixtures, cannot be broken down into simpler components by physical means. The properties of a compound are distinct from those of the elements that make it up, and they can only be separated into their constituent elements through chemical methods.
Compounds can be classified into different types based on their chemical bonding. Ionic compounds, covalent compounds, and metallic compounds are the three most common types of compounds.
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108Xe is expected to be stable. Why is this false?
Answers
When the structure of 108Xe with S=0 is calculated, it has been noted that it contains 54 protons and 54 neutrons with strong symmetry, therefore 108Xe was thought to be stable, but when its half life is determined experimentally, it comes to be just 58 microseconds, which is truly quite low.
Xenon is a chemical element with the symbol Xe and the atomic number 54. It is a colourless, odourless noble gas found in tiny amounts in the Earth's atmosphere. Dizziness, nausea, vomiting, loss of consciousness, and death can result from excessive inhalation. Poor judgement, confusion, or loss of consciousness can all lead to death, preventing self-rescue.
Xenon is used in several specialised light sources. It emits a gorgeous blue light when activated by an electrical discharge. Xenon lamps are used in a wide range of applications, such as high-speed electronic flash bulbs for photographers, sunbed lamps, and bactericidal lights for food preparation and processing. Xenon improves long-term cognitive function in mice, reduces neuronal loss and chronic neuroinflammation, and improves survival after traumatic brain injury.
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Acetaminophen is the active ingredient in Tylenol. Calculate the mass of carbon in 99.0 g of acetaminophen (CgH9NO₂) NOTE: Round your typed answer to include 2 decimal places.
Answers
Answer:
6.55 g
Explanation:
The atomic mass of Carbon (C) is 12.0107, of Hydrogen (H) is 1.008, of Nitrogen(N) is 14.0067, and of Oxygen(O) is 15.9994
Therefore the molar mass of acetaminophen = 12.0107 + 4 * 1.008 + 14.0067 + 2 * 15.9994 = 151.16
mass of C in 99.0 g of acetaminophen = (99.0 g / 151.16 g/mol) * 1 mol C/ 1mol acetaminophen
mass of C in 99.0 g of acetaminophen = 6.545 g
help asap
1.How many significant figures are present in the following measurements? solve these
a. 52.10 mL
b. 6.07∙10100 atoms
c. 300 km
2.List the number of protons, neutrons, and electrons present in a Mg atom.
3.Draw a Bohr diagram for an atom of Mg.
4.Calculate the number of moles in 162.32 g of CuCl2
Answers
Answer: As we all are aware that life on Earth is existed due to several environmental changes and there are several scientific factors of sustainability that support the survival and evolution of life on Earth.
Scientific factors of sustainability include solar energy, chemical cycle, and biodiversity that supported life on Earth. solar energy helps all organism and especially producers to gain energy and store the energy which further used in chemical cycles of transferring energy to other trophic levels.
Chemical cycle also involves the interaction of biotic and abiotic envrionment with each other that leads to environmental changes as well as organisms adapt themselves accordingly.
Biodiversity maintains the balance in the ecosystem and prevent dominancy of one organism otherwise it can lead to scarcity and organism would not be able to survive. Variation in biodiversity due to random mating in the same species leads to evolution and produces new species of organisms.
Hence, scientific factors of sustainability play major role in survival and evolution of life on the Earth.
Explanation: Is this what you need
assuming an efficiency of 49.20%, calculate the actual yield of magnesium nitrate formed from 148.4 g of magnesium and excess copper(ii) nitrate.
Answers
To calculate the actual yield of magnesium nitrate, you need to know the theoretical yield and then compare it to the actual yield. The theoretical yield is calculated based on the balanced chemical equation for the reaction between magnesium and copper(ii) nitrate. The actual yield is the amount of magnesium nitrate that was actually produced during the reaction.
About Magnesium NitrateMagnesium nitrate refers to the inorganic compound with the formula Mg(NO₃)₂ₓ, where x = 6, 2, and 0. These are all white solids. The anhydrous material is hygroscopic, quickly forming hexahydrate when in air. All salts are highly soluble in water and ethanol.
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The reduced pressure and reduced temperature Pr and Tr are temperature and pressure normalized with respect to their . . . counterparts
Answers
The reduced pressure and reduced temperature (Pr and Tr) are temperature and pressure normalized with respect to their critical point counterparts.
The critical point of a substance refers to the specific temperature and pressure at which the liquid and gas phases become indistinguishable. When discussing the behavior of substances, it is often useful to compare their temperature and pressure to the values at the critical point. To achieve this comparison, the reduced pressure (Pr) and reduced temperature (Tr) are introduced.
The reduced pressure (Pr) is calculated by dividing the actual pressure of the substance by its critical pressure. It provides a relative measure of the pressure compared to the critical pressure. Similarly, the reduced temperature (Tr) is obtained by dividing the actual temperature by the critical temperature of the substance. It represents the temperature normalized with respect to the critical temperature.
By using these reduced parameters, scientists and engineers can analyze and compare the behavior of different substances under varying conditions, without relying solely on absolute temperature and pressure values.
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What should a simplified model of a large molecule like glucose show?
Answers
Glucose is the simplest sugar and carbohydrate that provides energy. The simplified model of glucose (C₆H₁₂O₆) shows carbon, hydrogen, and oxygen atoms linked together.
What is glucose?Glucose is an example of a carbohydrate macromolecule that is further classified as a monosaccharide. They are crystalline and fundamental units of carbohydrates.
The molecular formula of glucose is C₆H₁₂O₆ and the mass is 180.156 g/mol. It is an aldohexose that contains an aldehydic functional group. In its structure, there are six oxygen atoms, six carbon atoms, and twelve hydrogen atoms.
Therefore, the glucose molecule is composed of C, H, and O.
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After a certain pesticide compound is applied to crops, its decomposition is a first-order reaction with a half-life of 56 days. What is the rate constant, k, for the decomposition reaction?
Answers
The rate constant, k, for the decomposition reaction : k = 0.0124 / days
Further explanationGiven
The half-life of 56 days
Required
The rate constant, k
Solution
For first-order, rate law : ln[A]=−kt+ln[A]o
The half-life : the time required to reduce to half of its initial value.
The half life :
t1/2 = (ln 2) / k
k = (ln 2) / t1/2
k = 0.693 / 56 days
k = 0.0124 / days
The rate constant for the decomposition reaction has been 0.0124/days.
The rate constant has been given by;
log [Final concentration] = kt + log [Initial concentration]
k has been the rate constant, and t has been the time.
The initial concentration has been 1, after the half life period the concentration has been half i.e. 0.5 .
The given half life has been 56 days.
The rate constant can be calculated as:
log 1 = k(56) + log 0.5
k(56) = 0.693
k = 0.0124/days.
The rate constant for the decomposition reaction has been 0.0124/days.
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PLEASE JUST PLEASEEE ANSWER THEM PLSSSS!!! I can’t fail bro plsss
Answers
Explanation:
K = °C + 273
1. -234 + 273 = 39K
2. 84 + 273 = 357K
3. 70 + 273 = 343K
4. -24 + 273 = 249K
5. 134 + 273 = 407K
6. 120 + 273 = 393K
-234 °C = 39K
84 °C = 357K
70 °C = 343K
-24 °C = 249K
134 °C = 407K
120 °C = 393K
Answer:
-234°C = 39K
84°C = 357K
70°C = 343K
-24°C = 249K
134°C = 407K
120°C = 393K
Explanation:
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the term used to denote concentration of electrolytes in a given volume is
Answers
The term used to denote the concentration of electrolytes in a given volume is "molarity".
Molarity-
Molarity is the number of moles of solute dissolved in one liter of the solution. Molarity is the most widely used concentration metric in chemistry, and it is frequently denoted by "M." It denotes the amount of solute in moles per liter of solution.
A solution's molarity can be calculated using the following formula:
Molarity = moles of solute / liters of solution
Molarity is often used to express the concentration of a solution's electrolytes because electrolytes break into ions when dissolved in a solvent, allowing for electrical conductivity.
Molarity can be used in other applications, such as stoichiometry, which involves determining how much of one compound is required to react completely with another.
Molarity is a useful tool for solving problems that involve chemical reactions since the number of moles of a substance is frequently used to establish reaction ratios, limit reactants, and determine the theoretical yield.
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Organize the reaction steps in the best order for the synthesis of the compound shown from benzene. 1. bromination 2. nitration 3. reduction.
Answers
The best order for the synthesis of the compound shown from benzene would be 1. nitration, 2. bromination, and 3. reduction.
Firstly, nitration involves adding a nitro group (-NO₂) to the benzene ring, which is achieved by reacting benzene with a mixture of concentrated nitric and sulfuric acid. This reaction is highly exothermic and can result in the formation of undesirable by-products if not carefully controlled. However, once the nitro group is added, it provides a suitable handle for subsequent functionalization reactions.
Next, bromination involves adding a bromine atom (-Br) to the benzene ring, which is achieved by reacting the nitrobenzene with a bromine source such as iron(III) bromide. This reaction replaces the nitro group with a bromine atom, which is more reactive and can undergo further reactions.
Finally, reduction involves converting the bromonitrobenzene to the desired compound by reducing the nitro and bromine groups to amine and alkyl groups, respectively. This can be achieved using a reducing agent such as hydrogen gas and a metal catalyst such as palladium on carbon. The reduction reaction must be carefully controlled to avoid over-reduction or under-reduction of the functional groups.
In summary, the best order for the synthesis of the compound shown from benzene is nitration, bromination, and reduction. This order ensures that the functional groups are added and modified in a controlled manner to achieve the desired product.
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The amount of kinetic energy an object has depends on its:
**hint: look up the equation for kinetic energy
Question 3 options:
mass and volume
volume and speed
speed and postion
mass and speed
Answers
Answer:
the 4th one
Explanation:
kinitc energy formula is1/2mv^
there is mass ,and velocity (speed)
I hope it help
Answer:
Explanation:
Speed and position
X-ray crystallography can only be used for structure determination if the wavelength of the X-ray photon (λ) is on the order of the lattice constant (d). Selectone: True False
Answers
The statement "X-ray crystallography can only be used for structure determination if the wavelength of the X-ray photon (λ) is on the order of the lattice constant (d)" is false because X-ray crystallography is used to determine the atomic arrangement of crystals, and it does not depend on the wavelength of the X-ray photon.
X-ray crystallography is a technique used to determine the structure of crystals by shining X-rays through the crystal. The diffraction pattern generated by the X-rays is then analyzed to determine the atomic arrangement of the crystal. Therefore, X-ray crystallography is used to determine the atomic arrangement of crystals, and it does not depend on the wavelength of the X-ray photon. Rather, the resolution of the structure determination is affected by the wavelength of the X-ray radiation.
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An aqueous solution contains 0.390 M HCl at 25.0 °C. The pH of the solut 0.87 0.41 0.67 0.99 1.22
Answers
Answer:
0.41
Explanation:
-log [.390]
The pH of the solution is 0.41. The pH of the aqueous solution containing 0.390 M HCl at 25.0 °C can be calculated using the formula pH = -log[H+], where [H+] is the concentration of hydrogen ions in the solution. HCl is a strong acid, which means it completely dissociates in water to form H+ and Cl- ions. Therefore, the concentration of H+ ions in the solution is equal to the concentration of HCl, which is 0.390 M.
Using this concentration in the pH formula, we get:
pH = -log(0.390)
pH = 0.41
Therefore, the pH of the aqueous solution containing 0.390 M HCl at 25.0 °C is 0.41.
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CHemistry middle school please help
Answers
The characteristics of a certain group of elements as listed are those of strontium.
The correct option is D.
Which of the elements is in this group with given properties?Elements in the Periodic Table are organized into groups and periods.
Elements in the same group have the same number of valence electrons.
Elements in the same period have the same number of electron shells.
The characteristics of a Group of Elements are given below
. Is shiny
• Is solid at room temperature
• Has atoms with two valence electrons, hence belongs to group 2.
The above element is strontium since it is the only element in group 2.
Learn more about group 2 elements at: https://brainly.com/question/20546688
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