The DNA could be damaged by heavy metals.
What are heavy metals?The term heavy metals are metals that are known to cause a lot of damage in the body. These metals include but are not limited to cadmium, arsenic and nickel. We know the DNA to be the genetic material that is found in humans. It is composed of complementary base pairs held together by hydrogen bonds.
The presence of these heavy metals are able to damage the genetic materials in DNA and are able to disrupt the pathways of the repair of damaged DNA.
2) The release of heavy metals into the atmosphere has led to a lot of heath challenges especially the fact that they have been known to be carcinogenic. It then follows that the companies that release heavy metals into land and water ecosystems should be penalized for the damage that the are causing to the environment as well as to human health when this metals enter human system via these sources.
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5) What is the temperature (in Kelvin) and pressure (in kPa) at STP?
An absolute pressure of precisely 105 Pa and a temperature of 273.15 K (0 °C, 32 °F) are considered to be STP (100 kPa, 1 bar).
Relation between temperature and pressure :The temperature at a given volume is directly proportional to the pressure of given quantity of that gas. A system's pressure increases as its temperature rises and vice versa. The Gay-law Lussac's establishes the relationship between pressure and temperature of a gas.
How does temperature affect pressure?The average kinetic energy of the gas's molecules directly relates to its temperature. Faster moving particles will more frequently and violently collide with the container walls. Because of this, the force acting on the container's walls increases, increasing the pressure.
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Explain why you think the IndoorAtlas is more accurate when there is more metal nearby.
The correct answer is :
The "signal" of the building is enhanced with more steel, which allows the technology to more precisely detect users. The technique used by IndoorAtlas is only effective inside.
Steel and concrete contribute to the distinctive magnetic fingerprints or signatures of structures, as the business notes on its website:
In a manner similar to how animals use the Earth's magnetic field, although on a smaller spatial scale, modern buildings with reinforced concrete and steel constructions contain distinct spatially variable ambient magnetic fields that can be used for locating. According to the path that is passed through a non-uniform ambient magnetic field, different magnetic field observations result.
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7. Apply Scientific Reasoning
Hooke
and Van Leeuwenhoek made their discoveries
around the same time. More than 150 years
later, Schleiden, Schwann, and Virchow all
made breakthroughs within a few years of each
other. What are some possible reasons for the
sudden development of the cell theory after
such a long break?
The 150-year gap in the scientific discovery could be because many individuals believed the theory of spontaneous generation.
What is the theory of spontaneous generation?The theory of Spontaneous generation is a superseded scientific theory that held that living creatures could arise from nonliving matter and that such processes were commonplace and regular.
The theory of Spontaneous generation is incorrect and also obsolete. This theory was formulated by Aristotle.
The theory of Spontaneous generation aims to explain the seemingly sudden emergence of organisms such as rats, flies and maggots within rotting meat and other decomposable items by suggesting that organisms do not descend from other organisms or from a parent, and that only require that certain conditions in their environment be fulfilled in order for creation to occur.
Many scientist disapproved the theory of Spontaneous generation and made studies and experiments to that effect. Such scientist's includes persons like Francesco Redi, John Needham, Lazzaro Spallanzani and many more people.
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A chemist determines by measurements that 0.065 moles of nitrogen gas participate in a chemical reaction. Calculate the mass of nitrogen
gas that participates.
Round your answer to 2 significant digits.
X
5
The mass of nitrogen gas that participates is 0.00464.
What is mass?
"Mass is the quantity of matter of a physical body." The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
The molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound.
The formula to calculate the mass
mass = moles / molar mass
Given, that the moles of nitrogen gas are 0.065 moles
The molar mass of nitrogen is 14
The mass of nitrogen is to be calculated.
Putting the values in the formula
0.065 / 14 = 0.00464
Therefore, the mass of nitrogen gas is 0.00464.
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Six swordfish were swimming in the sea.
Alliteration
Allusion
Assonance
Hyperbole
Metaphor
Onomatopoeia
Oxymoron
Personification
Simil
Answer:
Alliteration
Hope this helps :)
Hope this helps :)Explanation below.
Explanation:
The word S is repeated many times in the sentence, so alliteration would be the correct answer.
he picture above shows two beakers. Each beaker has an acid in it. Identify each beaker as either a strong or weak acid. Explain how you know the acid is strong or weak.
1 point - Each beaker is correctly identified as a strong or weak acid. (1/2 point for each right answer.)
1 point - You have explained how you know each beaker is a strong or weak acid.
From the images, hydrochloric acid is a strong acid because it dissociates completely in water to produce hydrogen and chloride ions.
What is an acid?Given the Arrhenius definition of an acid, an acid is any substance that produces hydrogen ion in solution as its only positive ion when dissolved in solution. We know that that acids could be strong or weak. Acids could also be organic or mineral. In this later classification, acetic acid is an organic acid while hydrochloric acid is a mineral acid.
With is said, let us now examine each of the beakers. We can see from each of the beakers that the beaker that contains the hydrochloric acid has the acid molecule completely dissociated to hydrogen ions and chloride ions.
In the other beaker that contains the acetic acids, there are only a few of the acetic acid molecules that have dissociated into hydrogen ion and the acetate ion.
As such, it is clear that hydrochloric acid is a strong acid because it dissociates completely in water to produce hydrogen and chloride ions.
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The grams of fat in one avocado that has 375 kcal, 17g of carbohydrates, and 3g of protein?
Answer: Six grams
Explanation: The avocado has a high-fat content, but it is only half the fat content of other fruits and vegetables. One avocado has about six grams of fat.
Calculate the volume of concentrated aqueous HCI, having a density of 1.188 g/ml
and containing 38% HCI by weight, needed to prepare 2 liters of a 0.20 N hydrochloric acid solution.
According to the given statement the volume of concentrated aqueous HCI is V (ml) = 32.3 ml
What use do hydrochloric acids ?In the food, textile, metal, and rubber sectors, Hydrochloric acid (HCl) is frequently employed as a bleaching agent to neutralize alkaline substances. It is neutralized when released into the environment, and it immediately hydrolyzes when it comes into contact with water.
Briefing:The molecular weight of HCl = 36.461
The valence (n) of hydrogen = 1
Equation 1:
Weight of HCl needed = 0.20 eq/L * 2.0 L * 36.461 g/eq
Rewriting the equation:
Weight of HCl needed
= 0.20 eq /1000ml * 2000 ml * 36.461 grams/eq
Weight = 14.5844 grams
The weight of HCl is related its current diluted volume by the equation:
Equation 2:
Weight =V(ml) * 1.188grams * 0.38/ml
Combining eq 1 and eq 2 us eq 3
Equation 3:
14.5844 grams
=V (ml) * 1.188 grams * 0.38/millilitres
Solving for V (ml):
V (ml)
= 14.5844 grams * ml/1.188 grams * 0.38
Rounding off and Cancelling out units,
V (ml) = 32.3 ml
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When writing a lab report where do your data tables belong
A. Conclusion
B. Materials
C. Purpose
D. Results
Answer:
Results or D.
Explanation:
I think it’s d. or results because normally that’s were I would put my information once I have my experiment done.
Proton moving at 3.97 X 10 8 m/s (mass of a proton = 1.673 x 10 -27 kg) what is its wavelength in nm??
The wavelength of the proton is9.9 * 10⁻⁷ nm.
What is the wavelength of the proton?The wavelength of a particle or wave is the distance between successive point in phase in the particle or the wave.
It can be said to be distance between successive crests or troughs.
The wavelength of a moving particle is given by the De Broglie's equation as follows:
λ = h/mvwhere h is Planck's constant = 6.63×10⁻³⁴ Js
m = mass of particle = 1.673 x 10⁻²⁷ kg
v is velocity of proton = 3.97 x 10⁸ m/s
λ = 6.63×10⁻³⁴/1.673 x 10⁻²⁷ * 3.97 x 10⁸
λ = 9.9 * 10⁻⁷ nm
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What are the products of sodium bicarbonate and citric acid reacting? Write the balanced equation for the reaction.
Answer:
Equation - citric acid & sodium bicarbonate ACID + CARBONATE --> SALT + WATER + CARBON DIOXIDE CITRIC ACID + SODIUM BICARBONATE ----> SODIUM CITRATE + WATER + CARBON DIOXIDE In this reaction, the sodium BICARBONATE is mixed with citric acid.
Explanation:
In a fission reaction, uranium-235 bombarded with a neutron produces
strontium-94, another small nucleus, and three neutrons.
Enter the complete equation for the fission reaction.
Express your answer as a nuclear equation.
In a fission reaction, uranium-235 bombarded with a neutron produce strontium - 94 , another nucleus and three neutrons.the nuclear equation is :
[tex]^{235} U_{92} + ^{1} n_{0} ------ > ^{94} Srx_{38} + ^{139} Xe_{54} + 3^{1} n_{0}[/tex]
uranium-235 bombarded with neutrons produce strontium-94 , another small nucleus and 3 neutrons.
[tex]_{92} U^{235}[/tex] + [tex]^{1} n_{0}[/tex] ------> [tex]^{94} Sr_{38}[/tex] + x + [tex]3^{1} n_{0}[/tex] ( x i unknown nucleus)
in this, the atomic no. and atomic mass in both the side should be same
atomic mass => 235 + 1 = 94 + 3 = 139
atomic no. 92 = 38 => 92 - 38 = 54 ( this is xenon - 139 , the unknown nucleus)
the balance nuclear equation equation is
[tex]^{235} U_{92} + ^{1} n_{0} ------ > ^{94} Srx_{38} + ^{139} Xe_{54} + 3^{1} n_{0}[/tex]
Therefore,In a fission reaction, uranium-235 bombarded with a neutron produce strontium - 94 , another nucleus and three neutrons.the nuclear equation is :
[tex]^{235} U_{92} + ^{1} n_{0} ------ > ^{94} Srx_{38} + ^{139} Xe_{54} + 3^{1} n_{0}[/tex]
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at lunch mr kaufman measured the volume of his 12 oz. soda before he drink it to be 14 oz
< Question 17 of 35 >
Macmillan Learning
Name the alkene. Be sure to indicate stereochemistry and use hyphens (-) not endashes (-).
H3C-CH₂
CH3
H
c=c
H
The alkene is named:
The name of the given chemical in IUPAC is 3-5-ethyl5-3-methylheptane.
What is a cyclic alkene?A cycloalkene, also known as a cycloolefin, is a form of alkene hydrocarbon that lacks the aromatic quality and possesses a closed ring of carbon atoms as well as one or more double bonds.
a functional group with a carbon-carbon double bond as its defining feature. When the carbon-carbon double bond is completely enclosed by another functional group, such as a benzene ring, we do not refer to the more intricate functional group as an alkene. basic alkene structure
Alkenes are a popular class of hydrocarbons that are present in crude oil. At least one carbon-carbon double bond exists in this family. The chemistry of the family's compounds is significantly altered by this double bond.
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A student is creating an art design using a right triangle. What transformation would describe the relationship between Triangle A and Triangle B?
A transformation which would describe the relationship between Triangle A and Triangle B is: C. reflection.
The types of transformation.Generally, there are different types of transformation and these include the following:
RotationTranslationDilationReflectionWhat is a reflection?A reflection can be defined as a type of transformation which moves every point of the object by producing a flipped but mirror image of the geometric figure.
In this context, we can reasonably infer and logically deduce that a transformation which would describe the relationship between Triangle A and Triangle B is reflection because they are both mirror image of one another.
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Complete Question:
What transformation would describe the relationship between Triangle A and Triangle B?
a. rotation
b. dilation
c. reflection
d. slide
Diagram the energy changes that can take placA flask has a mass of 100.00 g when empty and 600.00 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1100.00 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm3 at the temperature of the measurement.)
The density of sulfuric acid is 2 g/mL.
What is the density of the sulfuric acid?The density of the sulfuric acid is calculated as follows:
mass of empty flask = 100.0 g
mass of flask + water = 600.0 g
mass of water = 600 - 100
mass of water = 500.0 g
density of water = 1 g/mL
volume of water = mass/densityvolume of water = 500 g/1g/mL
Volume of water = 500 mL
Volume of water = volume of flaskVolume of flask = 500 mL
mass of flask + sulfuric acid = 1100. g
mass of sulfuric acid = 1100 - 100
mass of sulfuric acid = 1000 g
volume of sulfuric acid = 500 mL
Density of sulfuric acid = mass/volumedensity of sulfuric acid = 1000 g/ 500ml
Density of sulfuric acid = 2 g/mL
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A 50.00mL sample of solution containing Fe^2+ ions is titrated with a 0.0216 M KMnO4 solution. It required 20.62mL of KMnO4 solution to oxidize all the Fe^2+ ions to Fe^3+ ions by reaction.
MnO4- (aq) + Fe^2+ (aq) ------> Mn^2+ (aq) + Fe^3+ (aq) (unbalanced)
acidic
a.) What was the concentration of Fe^2+ ions in the sample solution?
b.) What volume of 0.0150 M K2Cr2O7 solution would it take to do the same titration? The reaction is
Cr2O7^2- (aq) + Fe^2+ (aq) ---------> Cr^3+ (aq) + Fe^3+ (aq) (unbalanced)
acidic
The concentration of Fe[tex]^+2[/tex] ions is 0.0088 M, and 29.33 L of K₂Cr₂O₇ is required for the titration.
How to calculate concentration of solution?Concentration of a titrand when volume is given can be calculated as,
M₁V₁=M₂V₂
Likewise volume of titrand can also be calculated by the same formula.
In the given problem, concentration of KMnO₄ =0.0216 M and it's volume=20.62 ml or 0.0206 L, volume of Fe[tex]^+2[/tex] ions=50 ml or 0.05 L
substituting the values in the formula,
M₁=0.0216×0.0206/0.05=0.0088 M.
For calculating the volume of potassium dichromate using the same formula ,
V₂=0.0088×0.05/0.015=0.02933 ml or 29.33 L.
Thus, the concentration of iron(II) ions in sample is 0.0088 M and 29.33 L of 0.015 M potassium dichromate is used for doing the same titration.
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What mass in grams of tin would be required to completely react with
1.50 L of 0.750 M HBr in the following chemical reaction?
Sn(s) + 4 HBr(aq) - SnBr (aq) + 2 H₂ (g)
Mass in grams of tin would be required to completely react with 1.50 L of 0.750 M HBr in the following chemical reaction is 36.19g
Mass in gram is the amount of that compound that has the same mass in grams as the formula mass in atomic mass unit
Here given reaction is
Sn + 4HBr → SnBr + 2H₂
Mole of HBr = 1.50L × 0.750 M
= 1.125 mol
From balanced equation 4 mole of HBr react completely with one mole of tin to form the said product
Therefore, 1.125mole of HBr react completely with 1/4×1.125= 0.2812 mole of tin to form the said product
Molar mass of ton is 118.71g/mol
Mass of tin required = 0.2812×118.71
36.19g
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Naphthalene (mothballs) is a substance that is not soluble in water and
Is easily sublimed. Potassium bromide is a substance that is soluble in water and does not sublime. Describe two methods by which we can separate these two components of a mixture.
Potassium bromide is a substance that is soluble in the water and does not sublime. We can separate these two components of a mixture by heat.
What is sublimation?Sublimation is a phase change process where solid material directly changes into a gas material. In this kind of phase change, solid material does not undergo a liquid state. At normal pressures, we usually do not observe sublimation unless the pressure is low enough that liquid states of substance cannot exist at these pressures.
In order to separate naphthalene from the mixture, we can heat up the mixture gently in order to boil away the naphthalene. Since we will be dealing with vapor product here, we will need a special enclosed container that can capture the naphthalene vapors. Once captured, these vapors can become solid again but now separated from initial mixture.
Another way is, put it in a beaker. Use a smaller beaker filled half way with ice and water and place in larger one. It should be about an inch or two above mixture. Heat over a Bunsen burner and naphthalene will deposit on the bottom of smaller beaker. And in this way, naphthalene be separated from mixture of KBr and sand.
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this model represents an atom and it parts. label the parts of an atom
Answer:
Pls attach the picture for labelling.
Generally parts of an atom are:
1) Protons (+)
2) Neutrons (neutral)
Protons and neutrons are present in the nucleus
3) Electrons (-)
what is the cation and the anion of VCl3?
The cation is [tex]V^3^+[/tex] and the anion is [tex]Cl^-[/tex] in [tex]VCl_3[/tex].
An ionic compound is a chemical compound made up of charged ions called cations and anions that are held together by electrostatic forces.
Cations are elements with one or more positive charges because they have more number of protons than electrons.
Anions are elements with one or more negative charges because they have more number of electrons than protons.
An ion which has lost electrons and now has a positive net charge is said to be a cation. An atom's cation is smaller than the neutral atom because electrons are taken out to produce a cation.
An ion which has acquired electrons and now has a negative net charge is called an anion. The anion of an atom is larger than the neutral atom because electrons have been added to produce it.
In Vanadium (III) chloride, vanadium gives 3 electrons and become +3 charge and chlorine gains 1 electron and become -1 charge. Since 3 electrons are given by vanadium, 3 chlorine atoms are bonded, thus the compound is [tex]VCl_3[/tex].
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I need these 3 questions answered with work shown :( I’m so bad at chem
Explanation:
3.)The given values:
Mass, m = 100.0 g
Density, d = 1.59 g/mL
As we know,
→ D = m/v
By substituting the given values, we get
v = m/d = 100/1.59
v = 62.89 ≈ 63mL
4.)The experiment makes use of Archimedes' principle, where the volume of a liquid displaced by an object, is equal to the volume of said object.
Thus, the volume displaced by the object is:
46.9 mL - 25.0 mL = 21.9 mL
The volume of the object is 18.9 mL
Density is equal to the mass divided by the volume, so:
D = m/V = 53.5 g/21.9 mL
D = 2.44 g/mL
5.)For water,
ρ density = 1.0 g/mL
v = 425 mL
d = m/v
m = d × v
m = 1 × 425 = 425 g
Suppose a popular FM radio station broadcasts radio waves with a frequency of 90. MHz. Calculate the wavelength of these radio waves.
The wavelength of the radio waves is 3.33 m
What is wavelength?This is simply defined as the distance between two successive crests or trough
Relationships between frequency, wavelength and velocityThe velocity, frequency and wavelength of a wave are related according to the following equation
Velocity (v) = wavelength (λ) × frequency (f)
v = λf
How to determine the wavelengthThe wavelength of the radio wave can be obtained as illustrated below:
Frequency of radio wave (f) = 90 MHz = 90×10⁶ Hz Velocity of radio wave (v) = 3×10⁸ m/sWavelength of radio wave (λ) =?λ = v /f
λ = 3×10⁸ / 90×10⁶
λ = 3.33 m
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Explain the relationship between heat and thermal energy.
Answer:
Thermal energy gives the total kinetic energy the system possesses. It is used to determine the internal energy of a system.
Heat is the flow of thermal energy between two objects of different temperature.
Explanation:
Lots of good info out there on this - search, read, and enjoy :)
Which relationship is NOT correct?
1 mL = 1 cm3
1000 kg = 1 g
100 cm = 1 m
1 L = 1000 mL
Answer:
1000 kg = 1 g
Explanation:
1000 g = 1 kg
please make my answer as brainelist
Determine the mass in each of the following
1) 54 molecules of CO2 (MM = 44.0 g/mol)
2) 3.65 x 1024 molecules of water (MM = 18.0 g/mol)
The mass of a substance with given number of molecules can be calculated by first finding the number of moles in the substance as follows:
No. of moles = no of molecules ÷ Avogadro's number
Moles of carbon dioxide = 54 ÷ 6.02 × 10²³ = 8.97 × 10²³ molesMoles of water = 3.65 x 10²⁴ ÷ 6.02 × 10²³ = 0.61 molesMass of these substances can be calculated by multiplying the number of moles by their molar mass as follows:
Mass of carbon dioxide = 8.97 × 10²³ moles × 44 g/mol = 3.95 × 10²⁵ grams. Mass of water = 0.61 moles × 18 g/mol = 10.98 gramsLearn more about mass at: https://brainly.com/question/21042927
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the energy needed to heat 5.95 g of water from 5.5 ∘C to 64.9 ∘C
The energy needed to heat 5.95 g of water is 1484.406 J.
When work is done and heat and light are produced, energy is the quantitative quality that is transferred to the body or to the physical system.
The water is heated from 5.5° C to 64.9° C.
The mass of the water is 5.95 grams.
The specific heat of water is 4.2 J g⁻¹ C⁻¹ .
Now, the water is heated from:
T₁ = 5.5° C to T₂ = 64.9° C
Therefore, ΔT = T₂ - T₁ = 64.9 - 5.5 = 59.4° C
The heat energy is given as:
Q = m × C × ΔT
Q = (5.95 g ) × ( 4.2 J g⁻¹ C⁻¹ ) × ( 59.4° C )
Q = 1484.406 J
The energy released on heating 5.95 g of water from 5.5° C to 64.9° C is 1484.406 J.
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Please help!
See attached photo
Answer:
melt;freeze
Explanation:
and I don't have an explanation
If a car has an EPA mileage rating of 30 miles per gallon, what is this rating in
kilometers per liter? (1 L = 1.06 qt)
The rating in kilometers per liter is 12.75 kilometer per liter
How to convert 30 miles per gallon to kilometer per gallon1 mile per gallon = 1.60934 Kilometer per gallon
Therefore,
30 miles per gallon = 30 × 1.60934
30 miles per gallon = 48.2802 kilometer per gallon
How to convert 48.2802 kilometer per gallon to kilometer per liter1 kilometer per gallon = 0.264172 kilometer per liter
Therefore,
48.2802 kilometer per gallon = 48.2802 × 0.264172
48.2802 kilometer per gallon = 12.75 kilometer per liter
Thus, the rating in kilometer per liter is 12.75 kilometer per liter
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a 175 lb patient is to under go surgery and will be given an anesthetic intravenously. The safe dosage is 12 mg/kg of body weight. Determine the maximum dose of anesthetic that should be used
Taking into account the rule of three, the maximum dose of anesthetic that should be used is 952.5444 mg.
Rule of threeThe rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, the direct rule of three must be applied using the following formula, being a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So: x=(c×b)÷a
Maximum dose of anesthetic
In this case, you know:
Body weight= 175 lb= 79.3787 kg (being 1 lb= 0.453592 kg)Safe dosage= 12 mg/kg of body weightYou can apply the following rule of three: if for 1 kg of body weight 12 mg should be supplied, for 79.3787 kg of body weight, how much anesthetic should be supplied?
1 kg ⇒ 12 mg
79.3787 kg ⇒ x
So: x=(79.3787 kg× 12 mg)÷ 1 kg
Solving:
x= 952.5444 mg
In summary, the maximum dose of anesthetic that should be used is 952.5444 mg.
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