Why are atoms neutral?
A They have neutrons in the nucleus
B. They have the same number of protons and electrons
They tend to have 8 valence electrons
D
None of the above
Answers
Answer:
B. They have the same number of protons and electrons
Explanation:
Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge, making them neutral. When there are the same number of protons as there are electrons, the charges balance out, leaving you with a neutral atom.
Related Questions
Saponification of a triglyceride with aqueous sodium hydroxide gives the following.
A. Sodium acetate and long-chained fatty acids
B. glycerol and the sodium salts of long-chainedfatty acids
C. glycerol and long-chained alcohols
D. sodium acetate and long-chained alcohols
Answers
The correct answer is B. Saponification of a triglyceride with aqueous sodium hydroxide breaks down the triglyceride into glycerol and the sodium salts of long-chained fatty acids.
This is also known as soap formation. The sodium hydroxide reacts with the ester bonds in the triglyceride, releasing the fatty acids and forming sodium salts. Glycerol is a byproduct of this reaction. Option A is incorrect because sodium acetate is not involved in saponification. Option C is incorrect because alcohols are not formed in saponification, only fatty acids and glycerol. Option D is also incorrect because sodium acetate and alcohols are not produced in saponification.
B. glycerol and the sodium salts of long-chained fatty acids.
During saponification, the ester bonds of the triglyceride are broken by the sodium hydroxide, resulting in the formation of glycerol and the sodium salts of long-chained fatty acids, also known as soap.
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how can you blance it and make it equal on both sides
2H2+o2=2H2o blance it
Answers
Answer:
it have been already balanced
2H2 + O2 = 2H2O.
An object has a mass of 183.5 g and a density of 14.8 g/cm³. Determine the volume of the objectin cm³.
Answers
First, let's remember the formula to calculate an object's density:
\(\begin{gathered} \rho=\text{ }\frac{m}{V} \\ \\ Being\text{ }\rho\text{ the density, m the mass, and V the volume.} \end{gathered}\)Then, we analyze what we have:
\(\begin{gathered} m\text{ = 183.5 g} \\ \rho=\text{ 14.8 g/cm}^3 \end{gathered}\)We need to determine the volume, so we transform our formula like this:
\(V=\text{ }\frac{m}{\rho}\)We replace our data:
\(V=\text{ }\frac{183.5\text{ g}}{14.8\text{ g/cm}^3}=\text{ 12.399 cm}^3\approx\text{ 12.4 cm}^3\)Then, the answer is that the volume equals 12.4 cm^3.
A frozen popsicle is sitting outside in the sun. How will energy travel between the cold popsicle and the warm air around the popsicle?
Answers
Answer:
When the frozen popsicle sitting outside in the Sun is exposed to warm air, energy will travel between the popsicle and the warm air as follows;
1) Convection current
Heat will be gained by the frozen popsicle by coming into contact with fresh warm air as the air flows around the popsicle while the cooling of the warm air will cause the water vapor in the air to condense and form the visible mist
In turn the popsicle will gain heat resulting in melting of the ice
2) Conduction
As the some of the mist from the air settles on the popsicle, they share their heat resulting further melting of the popsicle
3) Radiation
Radiated heat energy from the Sun is absorbed by the popsicle resulting in the melting of the popsicle
Explanation:
NO FAKE ANSWERS PLEASE WILL GIVE BRAINLIEST
How many atoms of Mg are present in 97.22 grams of Mg?
6.022 × 1023
2.408 × 1024
4.818 × 1024
5.855 × 1025
Answers
Answer:
The answer would be (b)
Explanation:
3.- La fórmula CH3-CH=CH-CH2-CH2-CH2-CH3 ,se le debe llamar de la siguiente manera.
A) Hepteno
B) 1 Hepteno
C) 2 Hepteno
D) Heptinol
4.- La fórmula en la cual se presenta al menos un doble enlace como este ejemplo CH2=CH2, NOS
INDICA QUE ES UN HIDROCARBURO DEL TIPO.
A) Aromático
B)Alcano
C) Aquino
D)
Alqueno
5.-la formula CH3-CH-CH2-CH-CH2-CH3
I
I
CH3-CH2 CH3 SU NOMBRE QUÍMICO ES
A) 3,5 di metil
B) 2 etil ,4 metil C) Nonano
heptano
pentano
D) Decano
6.- el nombre correcto de esta fórmula (o estructura) química CH3-CH2-CH=CH-CH2-CH=CH2
debe ser
A) Heptano
B)1,4 heptadieno C)3,5 heptadieno D) 1.4 heptadiino
Nota recuerda que los hidrocarburos son compuestos químicos a base de carbono e hidrogeno (C
H) de allí que en sus estructuras estén los CH-CH-CH
Y QUE EL CARBONO ES TETRAVALENTE POR ESO PUEDE SER CH4, CH3- , -CH2-O SOLO -CH-
1
Answers
Answer:
Explanation:
calculate the ph of a solution that is 0.080 m in trimethylamine, (ch3)3n , and 0.13 m in trimethylammonium chloride, ( (ch3)3nhcl ).
Answers
The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution
The pH of a solution of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride can be calculated using the following equation:
Kb = [CH3)3N][H2O] / [(CH3)3NH+][OH-]
where Kb is the base dissociation constant of trimethylamine, (CH3)3N. Using the relationship that Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C), the OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09. When a solution is introduced to water, it can either react with the water to form acid or base.
The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution. The pH of the solution can be calculated using the pH formula, which is: pH = -log [H+], where [H+] is the concentration of hydrogen ions in the solution. The given solution is composed of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride. Trimethylamine is a weak base and trimethylammonium chloride is its corresponding conjugate acid. When a weak base is added to water, it undergoes a reaction with water to produce hydroxide ions and a conjugate acid.
The base dissociation constant of trimethylamine, Kb is used to find the OH- ion concentration of the solution. The relationship between Kb and Ka is given by Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C).The OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09.
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The Asian long-homed beetle can infect a variety of tress such as maple trees and elm trees. These beetles eat the inside of an
infected tree and destroy the pathways that water and nutrients travel through to get from the roots to the rest of the tree. This results
in the tree becoming sick and eventually dying.
A cargo ship canying Asian long-homed beetles introduces the species into a region where the beetles were not previously present
This region has a diverse population of maple and elm trees. How will humans in the area likely be impacted?
OA. The housing industry will be negatively impacted due to an increase in lumber costs.
OB. The maple syrup industry will be negatively impacted due to a decrease in the maple population
OC. The lumber industry will be negatively impacted due to a decrease in available resources.
OD. all of
Answers
Answer: The answer to your question is OD
Hope this helps.
Answer:
The answer is D, all of these.
Explanation:
The person above was right ^^
how many moles of h2s would we expect to be formed by reaction (b) if 3.50 moles of hno3 reacted completely
Answers
1.75 moles of H₂S reacts with 3.5 moles of HNO₃.
According to the balanced equation, the stoichiometric ratio between HNO₃ and H₂S is 2:1.
2 HNO₃ (aq) + Na₂S (aq) → H₂S (g) + 2 NaNO₃ (aq).
This means that for every 2 moles of HNO₃, 1 mole of H₂S is produced. Therefore, if 3.50 moles of HNO₃ react completely, we can calculate the expected moles of H₂S as follows:
Moles of H₂S
\(= \frac {(3.50 moles of HNO_{3})}{(2 moles of HNO3 per 1 mole of H_{2}S)}\\= \frac {3.50 moles}{2}\\= 1.75 moles\)
Hence, we would expect the formation of 1.75 moles of H₂S by the reaction if 3.50 moles of HNO₃ reacted completely.
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The complete question is:
How many moles of H₂S would we expect to be formed by reaction (b) if 3.50 moles of HNO₃ reacted completely. 2 HNO₃ (aq) + Na₂S (aq) → H₂S (g) + 2 NaNO₃ (aq).
I am trying to figure out what blood type the father of my son could have since my son and I are both type A. Also, my brother is type o and my mom is A.
Answers
Answer:
It could probably be O.
Explanation:
Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive. For example, if an O gene is paired with an A gene, the blood type will be A.
I NEED EXPLANATIONSS!!!! Help , i have to past or my teacher will fail me .. again !!
Answers
Answer:
Put simply, Asexual reproduction is reproduction without the use of gametes or the number of chromosomes being changed. So they are genetically identical creatures. Some animals include wasps, lizards, sharks, turkeys, and sea urchins.
Sexual reproduction includes chromosomes and gametes being fused, creating genetically different offspring. Examples of creatures that reproduce sexually are humans, chickens, cow, pigs, etc.
Explanation:
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How does an organisms DNA determine it's chances of survival:
How does humans manipulate DNA of organisms to be benefit themselves:
ANSWER PLEASE!!!!!!!(^O^)
I will give you 30 points!
Answers
Answer:
How does an organisms DNA determine it's chances of survival:
Organisms with heritable (genetically determined) features that help them survive and reproduce in a particular environment tend to leave more offspring than their peers. If this continues over generations, the heritable features that aid survival and reproduction will become more and more common in the population
How does humans manipulate DNA of organisms to be benefit themselves:
Biotechnology is the use of biological techniques and engineered organisms to make products or plants and animals that have desired traits.
The survival of an organism can be determined from its DNA, by checking any chances of mutation in its genetic codes. Humans manipulate DNA of organisms to create traits of greater survival and desired characteristics.
What is DNA?DNA or deoxyribose nucleic acid is a genetic material in all living bodies and are considered to be the building blocks of life. Genes are the basic of life and each genes are coded in a specific manner in each organisms.
The gene sequence have to be perfect in organism to make it the fittest to survive. The DNA sequence of different organism can be studies and any mutation that is wrong sequencing can be identified.
If any mutation is present, the organism cannot survive. DNA of one organism can be inserted into other one to get the characteristics of the first one through advanced research designs.
Therefore, humans manipulate DNAs of various organisms to change study how to change the characteristics and to get it in a desired way.
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What two chemical mechanisms change pyruvate to acetyl-CoA in the pyruvate dehydrogenase complex?
A) Dehydrogenation and oxidation
B) Decarboxylation and condenstation
C) Condensation and dehydrogenation
D) Dehydrogenation and decarboxylation
E) Condensation and oxidation
Answers
The two chemical mechanisms that change pyruvate to acetyl-CoA in the pyruvate dehydrogenase complex are Dehydrogenation and Decarboxylation. Hence the correct answer is D) Dehydrogenation and decarboxylation.
The conversion of pyruvate to acetyl-CoA in the pyruvate dehydrogenase complex involves two chemical mechanisms: dehydrogenation and decarboxylation.
Dehydrogenation refers to the removal of hydrogen atoms from a molecule. In this case, pyruvate undergoes dehydrogenation, resulting in the removal of hydrogen atoms and the generation of NADH.
Decarboxylation involves the removal of a carboxyl group (CO2) from a molecule. In the conversion of pyruvate to acetyl-CoA, one of the three carbons in pyruvate is removed as a carboxyl group, resulting in the formation of acetyl-CoA.
Therefore, the correct answer is D) Dehydrogenation and decarboxylation.
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How many L in 1.98m solution using 4.2mol
Answers
The volume needed to make 1.98 M of the solution is 2.12L
Molarity of a given solution is defined as the total number of moles of solute per litre of solution. One molar is the molarity of a solution where one gram of solute is dissolved in a litre of solution. As we know, in a solution, the solvent and solute blend to form a solution, hence, the total volume of the solution is taken.
Given,
Molarity = 1.98m
Moles = 4.2 mol
Molarity = number of moles of solute / volume of solution in L
Volume = moles / molarity
= 4.2 / 1.98
= 2.12 L
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The half-life of morphine in the human bloodstream is 9 hours. If initially there is 6mg of morphine in the bloodstream, 1. determine the amount of morphine in the human bloodstream after 18 hours. y= 2. When does the amount of morphine drop to 0.75mg ? t= hours
Answers
1. To determine the amount of morphine in the bloodstream after 18 hours, we need to use the formula y = A₀(1/2)^(t/h), where:
A₀ = Initial amount of morphine (6mg)h = Half-life of morphine (9 hours)t = Time elapsed (18 hours)y = Amount of morphine after 18 hoursWe have A₀ = 6mgh = 9 hourst = 18 hoursy = ?Now substitute the values in the formula; y = 6(1/2)^(18/9) = 6(1/2)^2 = 6(1/4) = 1.5mgTherefore, the amount of morphine in the bloodstream after 18 hours is 1.5mg.
2. To determine when the amount of morphine drops to 0.75mg, we will also use the formula y = A₀(1/2)^(t/h)Rearranging the formula t = hlog₂(y/A₀)where;
A₀ = 6mgh = 9 hoursy = 0.75mgNow substitute the values in the formula; t = 9 log₂(0.75/6) = 9(-1.16) = -10.44Therefore, the amount of morphine never drops to 0.75mg because the value of t is negative, which means it's an impossible time value.About BloodstreamThe Bloodstream is an organ system whose function is to move substances to and from cells. This system ensures the survival of organisms. So, in other words, this system has a very vital role in the body. “The circulatory system consists of three types of blood vessels, namely arteries, veins and capillaries. All three have their own characteristics and functions to circulate blood rich in oxygen and nutrients throughout the body.
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Heating Curve- Describe each section below. Remember to talk about state of matter or phase change, and how the energy is being used.
Answers
A heating curve is a graph that shows the changes in temperature and physical state of a substance as heat is added at a constant rate.
Describe each section of a heating curveSolid section: At the beginning of the heating curve, the substance is in its solid state. The temperature is relatively low and remains constant as heat is added. During this section, the energy added is used to overcome the intermolecular forces that hold the particles together in a fixed, orderly arrangement.
Melting section: As heat is added to the solid, its temperature increases until it reaches its melting point. At this point, the energy added is used to overcome the intermolecular forces holding the particles in the solid together, causing the substance to transition from a solid to a liquid state. During this section, the temperature remains constant until all the solid has melted.
Liquid section: Once the substance has completely melted, the temperature of the liquid starts to increase as heat is added. During this section, the energy added is used to increase the kinetic energy of the particles, causing them to move faster and spread apart.
Boiling section: When the temperature of the liquid reaches its boiling point, the energy added is used to overcome the intermolecular forces holding the particles together in the liquid and to separate the particles from each other, causing the substance to transition from a liquid to a gas state. During this section, the temperature remains constant until all the liquid has vaporized.
Gas section: Once the substance has completely vaporized, the temperature of the gas starts to increase as heat is added. During this section, the energy added is used to increase the kinetic energy of the particles, causing them to move faster and spread apart.
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in the reaction for part 1, what is the limiting reagent ? select one: a. scn- b. fe(scn)2 c. fe3 d. water
Answers
To determine the limiting reagent in the reaction for part 1, we first need to know the balanced chemical equation for the reaction.
Once you have the balanced equation and the initial amounts of each reactant, you can follow these steps to identify the limiting reagent:
1. Convert the initial amounts of each reactant to moles, if not already given in moles.
2. Determine the mole ratio of the reactants from the balanced equation.
3. Divide the moles of each reactant by the corresponding mole ratio from the balanced equation.
4. The reactant with the lowest result from step 3 is the limiting reagent.
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What volume is equivalent to 0. 0015 m3?
Answers
The volume is the equivalent to the 0.0015 m³ is the 1.5 × 10³ cm³.
The volume of the substance which can be regarded as the quantity of the specific substance as :
The Volume = 0.0015 m³
The conversion of the m to the cm is as :
1 m³ = 1000000 cm³
The conversion of the m to the cm is as :
1 m³ = 10⁶ cm³
The conversion of the 0.0015 m³ to the cm³ is as :
0.0015 m³ = 0.0015 m³ × ( 1000000 cm³ / 1 m³ )
0.0015 m³ = 1.5 × 10³ cm³.
The conversion of the 0.0015 m³ (meter cubic ) to the cm³ ( cubic centimeter ) is the 1.5 × 10³ cm³.
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You need to recrystallize a polar solute X that is contaminated with nonpolar impurity Y. If you use nonpolar solvent Q (which matches polarity of impurity Y) to carry out the recrystallization of X: Copyright 2022. Govindarajoo, G. Rutgers, The State University of New Jersey. How specifically would the impurity be separated from solute X in this situation:
Answers
In this situation, using a nonpolar solvent Q for recrystallization will allow for the separation of the polar solute X from the nonpolar impurity Y. Here's a step-by-step explanation of the process:
Dissolution: Dissolve the mixture of solute X and impurity Y in the nonpolar solvent Q at an elevated temperature. Since the nonpolar solvent Q matches the polarity of impurity Y, both the impurity and solvent will have similar intermolecular interactions, leading to their solubility in the solvent.
Filtration: While the solution is still hot, perform hot filtration to remove any insoluble impurities or solid particles. This step ensures that any large solid impurities are physically separated from the solution.
Cooling: Allow the solution to cool down slowly. As the temperature decreases, the solubility of solute X in the nonpolar solvent Q will decrease due to the differences in polarity. This will cause the solute X to crystallize out of the solution, while the impurity Y remains dissolved in the solvent.
Isolation: Once the crystals have formed, collect them by filtration or centrifugation. The crystals will contain the purified solute X, while the impurity Y will remain in the mother liquor (the remaining liquid after crystal formation).
Washing: Wash the collected crystals with a small amount of a nonpolar solvent, such as Q, to remove any residual impurity Y adsorbed on the crystal surface. This step ensures further purification of the solute X.
Drying: Finally, dry the purified solute X to remove any residual solvent and obtain the desired crystalline product.
By using a nonpolar solvent Q that matches the polarity of impurity Y, the recrystallization process selectively separates the polar solute X from the nonpolar impurity Y. This separation is based on the differences in polarity between the solute and impurity, allowing the solute to crystallize out of the solution while the impurity remains dissolved. The process ensures the purification of solute X, resulting in a high-quality crystalline product.
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(a) List any four properties of colloidal and mention any two properties in which colloids differ from suspension. (b) State what is Tyndall effect? Which of the following solution will show Tyndall effect? Starch solution, sodium chloride solution, tincture iodine, air, milk
Answers
Explanation:
(1) they are heterogenous mixture
(2) the size of particles of colloids is too small to be seen by bare eyes.
(3) they scatter light passing through them making it's path visible.
What results when two waves that are completely out of phase meet?
Answers
Answer:
Explanation:Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero.
If two waves that are completely out phase if meet they results in destructive interference. Hence, their intensities decreases for the resultant wave.
What is interference ?A wave of greater, lower, or the same amplitude is created when two waves merge through interference by combining their displacements at all points in space and time.
The interaction of waves that are coherent or correlated with one another, either because they originate from the same source or because their frequencies are similar or almost identical, leads to both constructive and destructive interference.
All sorts of waves, including light, radio, acoustic, surface water waves, gravity waves, and matter waves, can exhibit interference effects. In constructive interference, the waves are in single phase forms a resultant wave with higher amplitude.
When waves from out of phase meets, the resultant wave will have an amplitude less than the individual amplitudes.
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i pick D am i right if so or not why
Answers
Answer:
it would be b
Explanation:
because when the roller coaster is going downhill it is moving faster so that means there is potential energy becoming kinetic energy because kinetic energy is made from movement
Answer: 1
Explanation: Because it is not moving
What atom requires the greatest amount of ionization energy na or mg
Answers
Answer:
Mg
Explanation:
Mg requires more ionization energy to ionize because it has more protons than Na. If an atom, located within the same period, has more protons, the pull on the electrons will be greater. This makes it more difficult to remove these electrons during ionization.
As a general rule, ionization energy decreases as you go down a column and increases as you move to the right on the periodic table. Therefore, the elements with the highest ionization energies are located on the top right of the periodic table. Ionization energies increase across a group due to the quantity of protons increasing. Ionization energies decrease as you go down a column because the outermost electrons are further from the nucleus (where the protons are), making it easier to remove them.
What is the best description of radiation
Answers
Radiation is the emission and propagation of energy in the form of waves, rays, or particles. There are three main types of radiation Non-ionizing radiation , Ionizing radiation, and Neutrons.
Non-ionizing radiation is the release of energy from the lower-energy region of the electromagnetic spectrum. Ionizing radiation is radiation with sufficient energy to remove an electron from an atomic orbital, forming an ion. Neutrons are particles found in the atomic nucleus.
Radiation includes the emanation of any portion of the electromagnetic spectrum, plus it includes the release of particles. An example is a burning candle that emits radiation in the form of heat and light. Radiation is the release of energy, whether it takes the form of waves or particles. Radioactivity refers to the decay or splitting of an atomic nucleus. A radioactive material releases radiation when it decays.
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A student is asked to make up a 16% sodium chloride solution. She makes the solution by weighing an empty beaker (which has a mass of 98.56 g). Sodium chloride is added to the beaker. The mass of the beaker and sodium chloride is 114.71 g. Lastly the student added 84 mL of distilled water to the beaker. Reweighing the beaker she finds that the mass of the beaker, sodium chloride, and distilled water is 196.14 g.
Required:
What is the weight percentage of sodium chloride in this solution?
Answers
If the student makes the solution by weighing an empty beaker (which has a mass of 98.56 g). The weight percentage of sodium chloride in the solution is 16%.
The weight percentage of a solute is the percentage of the solute in grams per 100 grams of the solution. Here, we are given that a student made a 16% sodium chloride solution. So, we have to find the weight percentage of sodium chloride in the given solution.
The given solution was made by adding sodium chloride to an empty beaker with a mass of 98.56 g, and the mass of the beaker and sodium chloride was 114.71 g.
So,
the mass of sodium chloride in the beaker= Mass of the beaker, and sodium chloride - Mass of the beaker
= 114.71 - 98.56
= 16.15 g
The student added 84 mL of distilled water to the beaker and then reweighed it. The mass of the beaker, sodium chloride, and distilled water was 196.14 g.
So,
the mass of the solution= Mass of the beaker, sodium chloride, and distilled water - Mass of the beaker
= 196.14 - 98.56= 97.58 g
Now, we can calculate the weight percentage of sodium chloride in the solution.
The weight percentage of sodium chloride = (mass of sodium chloride/mass of solution) × 100%
= (16.15 / 97.58) × 100%
= 16.56%
So, the weight percentage of sodium chloride in the given solution is 16.56%.
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which is the strongest base in aqueous solution? a. hoc2h4oh b. ch3oh c. naoh d. nh3
Answers
Answer: option c) the strongest base in aqueous solution is NaOH
Explanation:
the strongest base in aqueous solution is NaOH because strength of a base is determined by its ability to donate hydroxide ions (OH-) in solution. and NaOH dissociates completely in water to produce Na+ and OH- ions. The presence of a fully dissociated hydroxide ion makes NaOH a strong base.
While, HOC2H4OH and CH3OH are weak acids. HOC2H4OH is ethylene glycol and CH3OH is methanol are weak acid due to the presence of the (-OH) group.
Also, NH3 (ammonia), is a weak base though it can accept H⁺ to form NH4+
what is the voltmeter reading this time?
Answers
Specific heat is used to explain why different substances what?
Answers
Specific heat is used to explain why different substances changes the temperature at different rate.
What is temperature?Temperature is a physical quantity which is expressed as quantitatively the perceptions of the coldness and hotness. Temperature is measured with a thermometer.
What is specific heat?It is defined as the amount of heat which is used to require to increase the temperature by 1°C.
The SI unit thorough which it is measured is J/ g/ °C.
Let's take an example of specific heat of water which is 4.184J/ g/ °C.
If the specific heat capacity of any substance is observes to be high, it will take more time for heating or cooling. If the specific heat capacity of any substance is observes to be high, it will take more time for heating or cooling.Therefore, specific heat is used to explain why different substances changes the temperature at different rate.
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Which one of the following substances would you predict to have the highest vapor pressure at given temperature? in these line drawings, a carbon is implicit at the end of a line (bond) or where two or more lines come together. carbon requires four bonds, so any missing bonds are implicitly bonds to hydrogen atoms
Answers
As a result, the material with the lowest boiling point will have the maximum vapor pressure at ambient temperature. The material with the lowest vapor pressure is that which has the greatest boiling point.
What variables influence vapor pressure?
Vapor pressure is the name given to the force produced when liquids evaporate. Three factors that typically affect vapor press performance are surface area, intermolecular forces, and temperature. Molecules have variable vapor pressures depending on their temperature.
What is vapour pressure, for instance?
It is essential to remember that a liquid's vapor pressure is equal to the atmospheric pressure while it is boiling. For instance, water's vapor pressure when it boils at sea level is 1 atmosphere since the surrounding pressure is also 1 atmosphere.
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Reconstituted ampicillin suspension has a shelf-life for 16 days
when stored in the refrigerator (5°C). What is the shelf-life at
room temperature (25°C)?
Answers
The shelf-life of the reconstituted ampicillin suspension remains unchanged at 16 days when stored at room temperature (25°C) compared to storing it in the refrigerator at 5°C.
To calculate the shelf-life of the reconstituted ampicillin suspension at room temperature, we'll assume that the degradation follows an Arrhenius relationship.
Shelf-life at 5°C (T₁) = 16 days
Temperature at 5°C (T₁) = 5°C
Temperature at room temperature (T₂) = 25°C
To find the shelf-life at room temperature, we can use the Arrhenius equation:
k₁ / k₂ = exp((Ea / R) * (1/T₂ - 1/T₁))
Since we don't have specific values for Ea and the reaction rate constants, we'll assume that they are the same for simplicity. Thus, we can write:
k₁ / k₂ = exp((Ea / R) * (1/25 - 1/5))
Simplifying the equation, we get:
exp((Ea / R) * (4/125)) = 1
To satisfy this equation, the exponential term must be zero, which implies:
(Ea / R) * (4/125) = 0
Solving for Ea, we find:
Ea = 0
Since Ea is zero, it means the reaction rate constants and degradation rates are the same at both temperatures. Therefore, the shelf-life at room temperature (25°C) is the same as the shelf-life at 5°C, which is 16 days.
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