To solve this we must be knowing each and every concept related to potassium level. Therefore, the correct option is option A that is Obtain an ECG.
What is potassium level?This condition is known as hyperkalemia, or excessive potassium. The Mayo Clinic states that the potassium level in blood should be between 3.6 to 5.2 millimoles a liter (mmol/L).
Critically high potassium levels are those over 5.5 mmol/L, while levels above 6 mmol/L could be lethal. A nurse is caring for a client who has a serum potassium level of 3.1 mEq/L. She should Obtain an ECG.
Therefore, the correct option is option A that is Obtain an ECG.
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HELLPP DUE TODAY ONLY 2 questions!!!!! WILL MARK YOU BRAINLIST AND 20 points
Explanation:
2CO (g) + O2 (g) → 2CO2 (g) ∆H = –566.0 kJ exothermic
2SO2(g) + O2(g) <=> 2SO3(g). Delta H = -198.2 kJ/mol. exothermic
2K + Cl2 —> 2KCl
how many moles of KCl will be produced if you have 6.0 moles of K?
Answer:
6 moles
Explanation:
What is the name of this molecule?
O A. Butane
O B. Propane
O C. Propene
O D. Butene
The molecule represented below is Butane.
Important things to know about Butane Butane is an organic compound consisting of 4 carbon atoms. it is also a straight chain alkane with unsaturated bonds.its molecular formulae is C4H10.Can be used as a refrigerant.looking at the structure give each point represents a carbon atom, placing a C on each point gives you a total of 4, making it to be butane.See picture attached for a vivid illustration of butane.
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Answer:
Butane
Explanation:
i just took tha test
Write the balanced chemical equation that represents the addition of CL2 to CH3CH=CH2.
The balanced chemical equation that represents addition of CL2 to CH3CH=CH2 is : CH3CH=CH2 = CL2 > CH3CHClCH2Cl.
What is meant by balanced chemical equation?Balanced chemical equations have the same number and type of each atom on both the sides of an equation. Coefficients in a balanced equation has to be the simplest whole number ratio and mass is always conserved in chemical reactions.
Balanced equation is an equation for a chemical reaction where the number of atoms for each element in the reaction and total charge is same for both the reactants and products. In other words, we can say that mass and the charge are balanced on both sides of a reaction.
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A sample of nitrogen gas occupies a volume of 2.00 L at 756
mm Hg and 0.00°C. The volume increases by 2.00 L and the
temperature decreases to 137 K What is the final pressure
exerted on the gas?
Answer:
Pf= 190 mmHg
Explanation:
(Pi×Vi)/Ti = (Pf×Vf)/T2
Initial Pressure Pi = 756mmHg,
Initial Volume Vi = 2L,
Initial Temperature Ti = 0°C=273K
Final Pressure Pf = ?,
Final Volume Vf = 2L+ Vi = 4L,
Final Temperature T2= 137K
Pf = (Pi × Vi × T2 )/(Vf × Ti)
Pf = (756 × 2 × 137)/(4 × 273)
Pf = 189.7 mmHg
Pf approx. 190mmHg
The combined gas law states the relationship between temperature, pressure, and volume. The final pressure of the gas is 190 mmHg.
What is combined gas law?Combined gas law states the relationship between the initial pressure, volume, and temperature to the final and is given as,
[tex]\rm \dfrac{P_{i} \times V_{i}}{T_{i}} = \rm \dfrac{P_{f} \times V_{f}}{T_{f}}[/tex]
Given,
Initial Pressure = 756 mmHg
Initial Volume = 2 L
Initial Temperature = 273 K
Final Volume = 4 L
Final Temperature = 137 K
The final pressure is calculated as:
[tex]\begin{aligned} \rm P_{f} &= \rm \dfrac{P_{i} \times V_{i} \times T_{f}}{V_{f} \times T_{i}}\\\\&= \dfrac{756 \times 2 \times 137}{4 \times 273}\\\\&= 189.7 \;\rm mmHg\end{aligned}[/tex]
Therefore, 190 mmHg is the final pressure.
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How many protons are neutral in nitrogen?
A neutral atom of Nitrogen will have seven protons.
The symbol given for Nitrogen is N, the atomic number 7. Atomic number is equivalent to the number of protons in an atom. So, for Nitrogen, the number of protons is 7.
What is a neutral atom?A neutral atom is an atom which consists of the same number of protons and the same number of electrons. Neutral atoms will have the equal number of protons in the nucleus as they have electrons orbiting the nucleus.
In a neutral atom, the total charge on the atom is zero. Atom has same number of protons and electrons in it. For example, neutral atom of Sodium, with atomic number 11, has 11 protons and 11 electrons in its neutral state.
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Fe2O3(s) +
_CO(g) - Fe(l) +
_CO2(g)
Balanced?
Which sample of matter has the lowest average kinetic
energy?
O 50. g at -55°C and 2.0 atm
O 50. g at 273 K and 4.0 atm
O 50. g at 33°C and 3.0 atm
O 50. g at 367 K and 1.0 atm
The given sample of matter has the lowest average kinetic energy is 50g at -55°C and 2.0 atm option - A is correct answer.
What exactly is kinetic energy?The force an object experiences as a result of motion is known as kinetic energy. An object can only accelerate if a force is applied to it. We have to put in the effort to use force. Once the work is done, energy is transferred to the object, which then moves at a new, constant speed.
Kinetic energy, which can be seen in the motion of an object or subatomic particle, is the energy of motion.
The average kinetic energy is the subject of the query. Thus, the only connection is to temperature. Kinetic energy increases with increasing temperature and decreases with decreasing temperature.
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Which of the following require(s) resonance structures to more accurately represent their electron arrangements
The correct representation about resonance structures is that The structure of the species cannot be correctly predicted by a single resonance structure and the only way resonance structures vary is in the way the electrons are arranged.
In valence bond theory, resonance is defined as a hybrid structure formed by combining a variety of contributing structure into a resonance hybrid. Because orbitals overlap, resonance happens. Pi bonds, created when two 2p orbitals overlap, are the building blocks of double bonds. These pi orbitals' electrons are delocalized since they will be dispersed across more than two atoms.
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Heat conservation is important for polar endotherms, thus they tend to be _________ so that they __________ their surface area to volume
Polar endotherms must save heat, hence they usually have a significant surface area to volume ratio. The capacity to maintain blood is what makes heat conservation unique.
Vasoconstriction keeps it in the centre by decreasing blood flow to the outside (also known as peripheral vasoconstriction). An endotherm is an organism that uses heat produced by its internal biological processes rather than nearly exclusively relying on ambient heat to keep its body at a metabolically advantageous temperature. In thermodynamics, heat is defined as a kind of energy that crosses a thermodynamic system's boundary due to a temperature differential across the barrier. Heat is not present in a thermodynamic system.
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What synthetic goal is achieved by subjecting an alkene to an oxymercuration demercuration reaction sequence
An alkene is subjected to an oxymercuration demercuration reaction sequence to attain a synthetic aim is the conversion of an alkene into an alcohol.
The oxymercuration reaction involves the addition of a hydroxymercury(II) compound (Hg(OH)2 or Hg(OAc)2) to the alkene in the presence of a strong base, such as sodium hydroxide (NaOH). This results in the formation of an intermediate alkoxymercury(II) compound, which can then be converted into an alcohol through the demercuration step. In the demercuration step, the alkoxymercury(II) compound is treated with a reducing agent, such as sodium borohydride (NaBH4), which reduces the mercury(II) to mercury(0) and converts the alkoxymercury(II) compound into an alcohol. In summary, the oxymercuration-demercuration reaction sequence is a two-step process that converts an alkene into an alcohol by adding a hydroxymercury(II) compound to the alkene in the presence of a base and then reducing the intermediate alkoxymercury(II) compound with a reducing agent.
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Which is the correct dot diagram for a neutral atom of Oxygen?
Answer:
The top left one is the answer I believe
Answer:
the one on the bottom right https://www.tenor.co/VV3E.gif
Which one of the following statements is not correct about MSDS?
Select one:
a.
It does not contain information on physical and chemical properties of the material, potential hazards of the material and how to work safely with these materials.
b.
It provides single reference for all information about hazardous chemicals.
c.
Material Safety Data sheet forms the important elements of effective Chemical Hazards Communication System.
d.
It is a document prepared by the manufacturers/suppliers of the chemical
Option B. It provides a single reference for all information about hazardous chemicals.
MSDS does not provide a single reference for all information about hazardous chemicals, but it does provide information on physical and chemical properties, potential hazards, and safe work practices.
Understanding the Role of MSDS in Chemical Hazard CommunicationThe Material Safety Data Sheet (MSDS) is a document prepared by the manufacturer or supplier of a hazardous chemical which provides information about the physical and chemical properties of the hazardous chemical, potential hazards associated with it, and how to work safely with it. The MSDS is an important element of an effective chemical hazard communication system as it provides information on how to identify and protect against potential health hazards, proper storage and handling procedures, and proper disposal methods.
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What are the coefficients needed to balance this chemical reaction to show that matter is conserved?
Fe + Cl2 → FeCl3
A
1, 1, 1
B
2, 3, 2
C
3, 2, 2
D
4, 2, 2
Answer:
b
the balanced is 2fe+3cl2=2fecl3
The coefficient that are required to balance the chemical reaction should be [tex]2fe+3cl2=2fecl3[/tex]
What is the chemical reaction?It is the process where it contain one or more substance known as the reactant. And, are converted into one or more different substance called as the products. It could be in the form of chemical elements or compounds.
Hence, we can conclude that The coefficient that are required to balance the chemical reaction should be [tex]2fe+3cl2=2fecl3[/tex]
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describe the phase and temperature chacges that will occur if you heat 50.0 g of h2o in its solid state at -8 C until it all vaporizes
The phase and temperature changes that will occur if you heat 50.0 g of H2O in its solid state at -8 C until it all vaporizes is that the solid H2O will transition to a liquid state at 0 C and then to a vapor at 100 C.
What is vapor?Vapor is an aerosolized suspension of tiny liquid particles that are released into the air. It is made up of a mixture of water and other chemicals, such as nicotine, propylene glycol, and other flavorings. Vapor is produced when heated liquid, such as e-liquid, is turned into a vapor. This vapor can be inhaled and exhaled in a manner similar to smoking a traditional cigarette, which is why vapor has become an alternative to traditional smoking.
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Calcular las fracciones molares de los componentes de una disolución formada por: 250 g de agua, 50 g de ácido acético y 25 g de cloruro de sodio.
The question is: Calculate the molar fractions of the components of a solution made up of: 250 g of water, 50 g of acetic acid and 25 g of sodium chloride.
Answer: The mole fraction of water, acetic acid and sodium chloride is 0.916, 0.054, and 0.028.
Explanation:
As number of moles is the mass of substance divided by its molar mass.
Therefore, moles of given species are calculated as follows.
The number of moles of water (molar mass = 18 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{250 g}{18 g/mol}\\= 13.88 mol[/tex]
The number of moles of acetic acid (molar mass = 60.052 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{50 g}{60.052 g/mol}\\= 0.832 mol[/tex]
The number of moles of sodium chloride (molar mass = 58.44 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{25 g}{58.44 g/mol}\\= 0.427 mol[/tex]
Therefore, mole fraction of each component is calculated as follows.
Mole fraction of water:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{13.88}{13.88 + 0.832 + 0.427}\\= \frac{13.88}{15.139}\\= 0.916[/tex]
Mole fraction of acetic acid:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{0.832}{13.88 + 0.832 + 0.427}\\= \frac{0.832}{15.139}\\= 0.054[/tex]
Mole fraction of NaCl:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{0.427}{13.88 + 0.832 + 0.427}\\= \frac{0.427}{15.139}\\= 0.028[/tex]
Thus, we can conclude that mole fraction of water, acetic acid and sodium chloride is 0.916, 0.054, and 0.028.
to produce 4.00 L of a 250. mM solution of sodium hydroxide, how many grams of NaOH must bee dissolved
You may determine the number of moles of solution you need by multiplying the volume in liters (4.00L) by the solution's molar concentration (0.250M), and then by the mass of sodium hydroxide (39.99 g/mol) in molar form. 1L = 39.99g × 4.00L x 0.250 M x 39.99g
The number sodium hydroxide of moles of solute dissolved in one liter of a solution is known as its molarity.
where,
250 mM Molarity =
moles of solute = n
= liquid volume in milliliters = 4L = 4000 ml
Now, using the molarity formula to combine all the values provided, we obtain
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What are the four factors that affect the natural selection?
Answer:
• potential for a species to increase in number
• the heritable genetic variation/ which results from mutation in dna
• the size of a population increases
• competiton for resources that are limited in that specific environment.
Explanation:
these are all factors that would affect natural selection although there are many more.
Fill in the blank.
When using a graduated cylinder you must look at ________ of the liquid when taking readings.
When using a graduated cylinder you must look at Meniscus of the liquid when taking readings.
How to Read a Graduated Cylinder?The surface at the center of the meniscus, not the top of the ring of liquid clinging to the graduated cylinder's wall, must be read in order to read a graduated cylinder correctly. This "center" will be the meniscus's lowest point for the majority of liquids. The center of the meniscus will be the highest point of the liquid for a very small number of liquids, such as mercury. Your line of sight must be level with the meniscus's center of curvature in order to interpret it correctly.
Reading a graded cylinder is a matter of paying close attention to the details once the measurement interval has been established and the meniscus has been assessed. Read the numbered line below while keeping your eyes level with the meniscus's middle and looking straight down.
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A group of students is making paper airplanes. They think that the kind of paper and the design of the airplane may affect how far each paper airplane flies. The students first test if the kind of paper affects how far the airplane flies. They make several airplanes out of different kinds of paper, using the same design. Why is it important that all the airplanes have the same design? (SC. 6. N. 1. 1)
By using the same design, the students can learn about both the effect of the design and the effect of the paper.
By using the same design, the students can learn about the effect of the design.
If they do not use the same design, the students cannot learn about the effect of the paper.
It is NOT important for the airplanes to have the same design because the students are not testing the effect of the design
Students can learn about the impact of both the design and the paper by working with the same layout. Students can learn about causality in design by replicating it and seeing its effects firsthand. The pupils won't get the full benefit of the paper unless they all follow the same format. There is no need for uniformity in airplane design since pupils will not be comparing the performance of different planes.
For the first test, students conduct an experiment to evaluate whether or not different types of paper affect the airplane's range of flight. Therefore, in the first experiment, the distance the paper travels after being thrown is the dependent variable and the type of paper is the independent variable.
The airplane's design is kept constant so that any differences in flight distance can be attributed to variations in the paper used in the experiment.
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A triatomic molecule is oriented as follows along the x-axis: mass m is at the origin, mass 2m is at x = a, and, mass 3m is at x = 2a. What is the moment of inertia of this molecule about the y-axis?
The moment of inertia of this molecule about the y-axis is 14ma^2.
The moment of inertia, also called angular mass or rotational inertia, of a rigid body refers to a quantity that determines the required torque for a desired angular acceleration about a rotational axis. Moment of inertia is the sum of the product of the mass of every particle with its square of a distance from the axis of rotation. Hence, moment of inertia of a system about an axis can be found by simply adding each of their moments, i.e., I = I1 + I2 + I3…+ In. Moment of inertia is given as: I = mr^2
Hence, based on given information:
I = m1(r1)^2 + m2(r2)^2 + m3(r3)^2
I = m(0)^2 + 2m(a)^2 + 3m(2a)^2
I = 2ma^2 + 12ma^2
I = 14ma^2
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what is the balance of S8+Br2=S3Br7
Answer:
3S₈ + 28Br₂ => 8S₃Br₇
Explanation:
Start with either sulfur (S) or bromine (Br) and balance ...
3S₈ + Br₂ => 8S₃Br₇ or S₈ + 7/2Br₂ => S₃Br₇
Balance the remaining reactant ...
3S₈ + 56/2Br₂ => 8S₃Br₇
Remove fractions by multiplying by the fraction's denominator
2(3S₈ + 56/2Br₂ => 8S₃Br₇) => 6S₈ + 56Br₂ => 16S₃Br₇
Reduce to smallest whole number ratio => standard equation at STP ...
3S₈ + 28Br₂ => 8S₃Br₇
Calcium oxide reacts with water to form calcium hydroxide. Type of reaction ____________________________ Balanced chemical equation:
Calcium oxide reacts with water to form calcium hydroxide which is a type of combination reaction. Therefore, the balanced chemical equation is: CaO+H2O→Ca(OH)2+Δ
The symbolic representation of a chemical reaction is a chemical equation. In this, the formulas and symbols for the reactants and products are used to depict them. Since the Middle Ages, quicklime, also known as calcium oxide, has been utilized as an alkaline substance. One of the oldest substances that humans have ever discovered is quicklime. Other names for it include lime or burned lime. Lime, or calcium oxide, is a chemical substance with the formula CaO. When calcium oxide, also referred to as quick lime, and water combine, calcium hydroxide is created (commonly known as slaked lime). This reaction is an example of a combination reaction.
Calcium oxide + Water → Calcium hydroxide
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What are the units of density
Answer:
Kg/ ml
Explanation:
Hope I help you
thank you
What are the products of the following reaction?
OCH2CH2OH excess HBr--> heat
O Br - OCH2CH2Br
O Br + BrCH2CH2OH
O OH + BrCH2CH2Br
O Br + BrCH2CH2Br
The products of the reaction of OCH2CH2OH with excess HBr under heat are: OCH2CH2Br (2-bromoethanol) and BrCH2CH2OH (1-bromo-1-propanol)
The mechanism for the reaction of OCH2CH2OH with excess HBr under heat is a multi-step process that involves the formation of a carbocation intermediate. Step 1: Protonation of the oxygen atom in OCH2CH2OH by HBr to form a good leaving group (OH) and a carbocation intermediate.
Step 2: Bromine atom from HBr attacks the positively charged carbon of the carbocation intermediate to form a covalent bond, resulting in the formation of intermediate compound.Step 3: Deprotonation of the intermediate compound by the remaining hydroxyl group to give OCH2CH2Br (2-bromoethanol) and HBr
Step 4: the HBr molecule from the step 3 could protonate another molecule of OCH2CH2OH and repeat the step 1 to 3 to form BrCH2CH2Br (1-bromo-1-propanol) as second product.
Overall, the reaction is an electrophilic substitution reaction, with HBr as the electrophile and the oxygen atom of the alcohol as the nucleophile.
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What group could X be in if it forms ions with ammonium in the ratio of (NH4)3X?
X could be in Group
If it forms ions with ammonium in the ratio of (NH4)3X, X could be in Group IV A. Group IVA (14) metals form cations with +4 charge, although tin (Sn) and lead (Pb) can form cations having +2 charge.
What does the term "coordinate bond" mean?A covalent link (a shared pair of electrons) in which both electrons originate from the same atom is known as a coordinate bond (also known as a dative covalent bond). Two atoms sharing a pair of electrons make a covalent connection. Because the electron pair is drawn to both nuclei, the atoms are kept together.
How is a coordinate bond recognized?An arrow pointing from the donor to the acceptor, with a positive charge on the donor and a negative charge on the acceptor, is used to symbolize a coordinate bond.
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A sample of magnesium metal reacts with 45.0 mL of 3.0 M solution of hydrochloric acid. How many moles of HCl are reacting
moles of HCl are reacting is [tex]135\times10^{-3}[/tex]
In the International System of Units, the mole is used to measure material quantity. The number of a substance's elementary entities that are present in an object or sample depends on the amount of that substance. A solute's molar concentration is used to represent how much of a solute there is per unit volume of a solution or how much of a chemical species there is in a solution.
Magnesium reacts with hydrochloric acid to generate a salt of magnesium chloride and release hydrogen gas.
Mg(s) +HCl(aq) [tex]\rightarrow[/tex] [tex]MgCl_{2}[/tex](aq)+[tex]H_{2}[/tex](g)
molarity =[tex]\frac{moles of solute}{volume of solution \:(l)}[/tex]
molarity of Mg is 3.0M volume of solution is 45ml
now, 3M=[tex]\frac{moles of solute}{45\times 10^{-3} \:(l)}[/tex]
moles of mg = 135 millimoles.
now according to the reaction by using stoichiometry
moles of Mg = moles of HCl
moles of HCl =135 millimoles =[tex]135\times10^{-3}[/tex]
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How many moles of magnesium oxide are formed if you burn a 2.3 mol sample of magnesium ribbon in the air? You must show ALL work to earn full credit.
2 Mg + O2 → 2 MgO
Given :
2 Mg + O₂ → 2 MgO
To Find :
How many moles of magnesium oxide are formed if you burn a 2.3 mol sample of magnesium ribbon in the air.
Solution :
From given balanced chemical reaction we can see that 2 mole of Magnesium reacts with 1 mole of O₂ to produce 2 mole of MgO.
Since, there is abundance of oxygen in air.
Therefore, 2.3 moles of magnesium will produced 2.3 moles of magnesium oxide.
How will you justify presence of 18 elements in 5th period and presence of 32 elements in 6th period?
The orbitals within subshells are filled in the sequence of increasing energy. The filling can choose from the 5s, 4d, as well as 5p sub-shells. Consequently, there are 18 total components in period 5.
There are 18 atoms in the 5th grade of the periodic table, never 32. Reason l=0, 1, 2, and 3 and n=5. The energy of the accessible electron shells 4d, 5s, and 5p grows in the correct sequence: 5s4d5p. and since there are a total of 9 accessible orbitals, 18 electrons could fit.
The fourth period includes 18 elements owing to the 10 extra electrons which the 3d orbitals can hold since the 3d sublevel doesn't really fill before the 4s sublevel.
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How many moles of sulfuric acid (H₂SO4) are needed to react completely with 6.8 moles of lithium hydroxide (LIOH)?
2LIOH + H₂SO4 → Li2SO4 + 2H₂O
O 3.4 mol H₂SO4
O 6.8 mol H₂SO4
O 10.2 mol H₂SO4
O 13.6 mol H₂SO4
3.4 mole of H₂SO₄ moles of sulfuric acid (H₂SO4) are needed to react completely with 6.8 moles of lithium hydroxide.
How many moles of sulfuric acid (H₂SO4) are needed ?
Based on the reaction’s stoichiometry: 2 LiOH + H2SO4 Li2SO4 + 2 H2O
It is obvious that when 2.0 moles of LiOH react with 1.0 mole of H2SO4, 1.0 mole of Li2SO4 and 2.0 moles of H2O are produced.
Making use of cross multiplication:
1.0 mole of H2SO4 totally interacts with LiOH (2.0 moles)
2.0 mole of H2SO4 is required to totally react with 6.8 mole of LiOH.
The mole of H2SO4 = (1.0 x 6.8) / (2.0) = 3.4 mole of H2SO4.
One mole of H2SO4 has an atomic mass of 98 grams. So 98 grams of H2SO4 comprises one mole of H2SO4 molecule, or seven moles of atoms.
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