Which of these acts as a buffer in embalming fluids? O sodium O lauryl O sulfate O calcium O lanolin

HNO3 to H2O has a stoichiometric ratio of 6:2.

To calculate the moles of HNO3, use 9 grams.

HNO3:H2O 6:2 9 grams/63 grams/mol = 0.143 moles.

0.048 moles of H2O are equal to 0.143*2/6.

water mass =0.048moles*18g/mol=0.864g

0.9 grams, to the closest tenth.

To know more about Stoichiometric Problems

https://brainly.com/question/14192433

Correct Question: How many moles of HNO3 required to react completely with 9grams of sulfuric acid?

The statement which best describes the impacts that building dams can have on wildlife and the environment include the following: C) When a dam is built on a river, it increases the available water, allowing people to irrigate crops and raise livestock, and it allows the inhabitants of the river to move freely along the length of the river.

A river can be defined as a large natural body of fresh water that continuously flow into an ocean, lake, sea or another river. Additionally, some examples of a river include the following:

Generally speaking, a dam can be built on a river in order to increase the availability of water, which then allows people to irrigate their crops and raise livestock, without affecting the free movement of the living organisms living in the river.

Read more on rivers here: brainly.com/question/17667168

#SPJ1

a cyanide antidote if the diagnosis of cyanide toxicity is strongly suspected, without waiting for laboratory confirmation.

Available antidotes are hydroxocobalamin (Cyanokit) and sodium thiosulfate and sodium nitrite (Nithiodote). Both are given intravenously.

Patients who present with more than minimal symptoms that resolve without treatment should be admitted for observation and supportive care.

In patients with acute poisoning from hydrogen cyanide (HCN) gas or soluble salts, the principal acute care concerns are hemodynamic instability and cerebral edema.

Therefore,  a cyanide antidote if the diagnosis of cyanide toxicity is strongly suspected, without waiting for laboratory confirmation.

To learn more about Cynaide toxicity, refer to the link:

https://brainly.com/question/28193348?

#SPJ1

Rutherford's gold foil experiment correctly advanced atomic theory by showing that the atom is an empty space with a dense positive nucleus.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Learn more about atom,here:

https://brainly.com/question/13654549

#SPJ1

Answer:

= 4.9 x 10^25 molecules of SF6

Explanation:

There's a guy named Avogadro something who said 1 mole of anything has 6.022x10^23 units (such as molecules, ions etc.) of that thing.

So to get to molecules just multiply 81 moles by 6.022x10^23

= 4.9 x 10^25 molecules of SF6

The mass of the magnesium strip from test tube 1 is different than the initial mass of the same strip measured in task 1, part A. This difference in mass is likely due to the reaction of the magnesium strip with the hydrochloric acid, which caused the magnesium to dissolve and be converted into magnesium chloride.

What is the magnesium?

Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a silvery-white, light, and ductile metal. Magnesium is a vital component of many biological processes, including photosynthesis and respiration, and is essential for many enzymes, proteins, and cell membranes. Magnesium is also an important component of human nutrition, as it helps to regulate calcium and potassium levels in the body. Magnesium is found in a variety of foods, including green leafy vegetables, nuts, whole grains, and dairy products. Additionally, magnesium can also be found in many dietary supplements. Magnesium deficiency can lead to a number of health problems, including muscle cramps, fatigue, and headaches.

To learn more about magnesium

https://brainly.com/question/15168276

#SPJ1

After diluting 500 ml of 1.25 mol CaCl₂ solution, the concentration of Cl⁻ ions increases to 2.08 Molar.

Given

Each CaCl₂ molecule gives two chloride molecules in the solution.

The initial concentration of CaCl₂  N₁  =  2 x 1.25 M ( n- factor = 2)

The initial volume of CaCl₂  V₁ = 500 ml

The final volume of the CaCl₂ solution V₂ = 600 ml

The final concentration of CaCl2 solution N₂ =?

N₁V₁ = N₂V₂

2 x 1.25 x 500 = N2 x 600 ml

N₂ = 2.08 molar chloride ion is present in the volume of the 600 ml solution.

Hence, dilution increases the dissociation percentage of salts.

To know more about Dilution.

https://brainly.com/question/21323871

#SPJ4

The concentration of Cl- ions rises to 2.08 mol after 500 ml of a 1.25 mol CaCl2 solution have been diluted.

Two chloride molecules are produced in the solution by each CaCl2 molecule.

CaCl2's initial concentration was 2 × 1.25 M (n-factor: 2).

CaCl2's initial volume, V1, is 500 ml.

The CaCl2 solution's final volume, V2, is equal to 600 ml.

The final CaCl2 solution N2 concentration is equal to.

N₁V₁ = N₂V₂

N2 x 600 ml = 2 x 1.25 x 500

The 600 ml of solution contains N2 = 2.08 molar chloride ions.

Dilution thereby raises the salts' dissociation percentage. The concentration of Cl- ions rises to 2.08 mol after 500 ml of a 1.25 mol CaCl2 solution have been diluted.

Learn more about concentration here-

https://brainly.com/question/10725862

#SPJ4

Answer:

filledbookmark

USE APP

Sign in

Questions & Answers

CBSE

Chemistry

Grade 11

The Gaseous State

backIcon

Answer

What volume will a gas occupy at 740mm pressure which at 1480 mm occupies 500 cc? Temperaturebeingconstant.

Last updated date: 30th Dec 2022

•

Total views: 162.6k

•

Views today: 16.20k

Answer

VerifiedVerified

162.6k+ views

Hint: Boyle in the mid 1600’s observed that the product of the pressure and volume of a gas are observed to be nearly constant provided that the temperature is kept constant. This is always true in the case of an ideal gas.

P×V=constant

This relationship between pressure and volume of an ideal gas is known as the Boyle's Law.

Complete answer:

Since it is given in the question that temperature can be assumed as constant, we can apply Boyle’s Law.

According to Boyle's Law we know that:

⇒P×V=constant

We can rewrite this as

⇒P1×V1=P2×V2

Where P1 is the pressure at the volume V1

P2 is the pressure at the volume V2

Thus from the given question we can say that:

P1 = 1480 mm

V1 = 500 cc

P2 = 740 mm

V2 = x

Thus we can rewrite the equation and substitute the above values and obtain the equation given below:

⇒V2=P1×V1P2

⇒V2=1480×500740

⇒V2=1000cc

Thus the volume of gas occupied at a pressure of 740 mm is 1000 cc.

The [OH-] in a solution that is 0.200 M in NaF. Ka for HF is 6.7 x 10^-4 is 1.73 x 10⁻⁶M . Therefore, option C is correct.

Any mixture of one or more solutes that have been dissolved in a solvent is referred to as a solution. To create a homogenous mixture, a solute must dissolve in a solvent. To create a homogenous mixture, a solute must dissolve in a solvent.

A particular kind of homogenous mixture made up of two or more substances is known as a solution. A solute is a substance that has been dissolved in a solvent, which is the other substance in the mixture.

Given that,

0.200M NaF → 0.200M Na⁺(aq) + 0.200M F⁻(aq)

Na⁺ + H₂O → no reaction  because sodium ion will not hydrolyze to form weak electrolyte

F⁻ + H₂O → HF + OH⁻ ( F⁻ hydrolyzes in water to form weak acid HF )

Now, Analysis:

                 F⁻        +    H₂O   →     HF     +      OH⁻

C ( i ):      0.200M         -------         0.00M       0.00M

ΔC :          -x                 -------            +x              +x

C ( eq ) : 0.200-x            -------              x                x

        ~0.200M

Kb = Kw/Ka(HF) = [HF][OH⁻]/[F⁻]

= x²/ ( 0.200 )

= 1x10⁻¹⁴/6.7x10⁻⁴

x = [HF] = [OH⁻]

= √(0.200)(1x10⁻¹⁴)/(6.7x10⁻⁴)

= 1.73 x 10⁻⁶M in OH⁻ ions.

Thus, option C is correct.

To learn more about the solution, follow the link;

https://brainly.com/question/7932885

#SPJ1

Most electric water heaters feature two thermostats: an upper thermostat and a lower thermostat, which are both hidden beneath two control panels.

You should set both thermostats to the same temperature in order to ensure that your electric water heater operates as effectively as possible. At any given time, only one element will be active. An example of a flip/flop system is this. There will always be 120 volts to both elements on a 240 volt water heater. The 240 volts needed to energize the element will be completed by the thermostat by sending the second leg of the 120 volts to the element. Where the burner typically situated at the bottom of the tank, sediment can accumulate over time.

Learn more about electric here-

https://brainly.com/question/16794016

#SPJ4

According to the electronic configuration, as magnesium ions carry a 2+ charge, each Mg atom gives one electron to an O atom.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/29757010

#SPJ1

The reaction of 50 mL of C12 gas with 50 mL of CH4 gas via the given equation, will produce a total volume of 100 mL (Option A)

The total volume of the products can be obtained as illustrated below:

We shall assume the pressure and temperature are kept constant.

First, we shall determine the limiting reactant. This is shown belo:

Cl₂(g) + CH₄(g) → HCl(g) + CH₃Cl(g)

From the balanced equation above,

1 mL of Cl₂ required 1 mL of CH₄

Thus,

50 mL of Cl₂ will also require 50 mL of CH₄

Thus, both reactants are limiting reactants.

Now we shall determine the volume of each products. Details below:

For HCl:

From the balanced equation above,

1 mL of Cl₂ reacted to produce 1 mL of HCl

Therefore,

50 mL of Cl₂ will also react to produce 50 mL of HCl

For CH₃Cl:

From the balanced equation above,

1 mL of Cl₂ reacted to produce 1 mL of CH₃Cl

Therefore,

50 mL of Cl₂ will also react to produce 50 mL of CH₃Cl

Finally, we shall determine the total volume of the products. Details below:

Total volume = volume of HCl + volume of CH₃Cl

Total volume = 50 + 50

Total volume = 100 mL (Option A)

Learn more about volume:

https://brainly.com/question/9614052

#SPJ1

The first quantum number, that is, the principal quantum number of a 1s² electrons is n= 1. Hence, option A is correct.

Quantum numbers of an electrons represents the allocation of electrons in each orbitals within an atom. There are four different quantum numbers namely, principal quantum number, azimuthal quantum number, magnetic quantum number and spin quantum number.

No two electrons in an orbital will have same set of these four quantum numbers. The principal quantum number corresponds to the main energy levels represented by the letter n.

n for 1s orbital is always 1. Similarly for a 3s orbital n is 3. Therefore, the principal quantum number of one electron in 1s is n=1.

Find more on quantum numbers:

https://brainly.com/question/16977590

#SPJ1

The element which is oxidized in the reaction; ZnO + C → Zn + CO is carbon.

The oxidizing agent in the reaction is ZnO.

The element which is reduced in the reaction; Cr₂O₇²⁻ + 3 HNO₂ + 5H⁺ → 2Cr³⁻ + 3 NO₃ + 4 H₂O is chromium.

The reducing agent in the reaction is HNO₂.

Oxidation reactions are reactions in which there is a loss of electrons or in which oxygen is added to an element.

Reduction reactions are reactions in which there is a gain of electros or in which oxygen is removed from an element.

Reducing agents are substances that undergo oxidation whereas, oxidizing agents are substances that are reduced.

In the equation of reaction shown below:

ZnO + C → Zn + CO

Carbon gets oxidized in the process of reducing zinc. Zinc gets reduced in the process of oxidizing carbon.

In the equation of reaction shown below:

Cr₂O₇²⁻ + 3 HNO₂ + 5H⁺ → 2Cr³⁻ + 3 NO₃ + 4 H₂O

Nitrogen gets oxidized in the process of reducing chromium. Chromium gets reduced in the process of oxidizing nitrogen.

Learn more about reducing and oxidizing agents at: https://brainly.com/question/13685878

#SPJ1

The number of moles of Boron in 4.80 moles of kryptonite is 14.4 moles of Boron.

The correct option is C.

The moles of a substance is the amount of that substance that contains as many elementary particles as there are 12 grams of carbon-12 isotope.

The moles of an element in a compound are determined from the mole ratio of the elements in 1 mole of the compound.

Given the formula for Kryptonite, NaLiSiB₃O₇(OH).

There are 3 moles of Boron in 1 mole of Kryptonite.

In 4.8 moles of kryptonite, there will be 4.8 * 3 moles of Boron.

Moles of Boron = 14.4 moles of Boron.

Learn more about moles at: https://brainly.com/question/30193507

#SPJ1

Complete question:

Jadarite, a.k.a. kryptonite, has a formula of NaLiSiB₃O₇(OH).

How many moles of boron are in 4.80 moles of kryptonite?

A. 4.80 B. 10.8 C. 14.4 D. 1.60 E. 658.4

Answer: the attraction between the protons and neutrons pulls the nucleus apart

Explanation: but also it is because of the fact that protons repel each other, and even though the neutrons hold the protons together in the nucleus, it has been theorized that eventually you will reach "critical mass" where you cannot make a nucleus any bigger, no matter how many neutrons you add.

Answer:

To find the number of atoms in 1.525 moles of potassium, you can use the formula:

Number of atoms = Number of moles * Avogadro's number

Avogadro's number is a constant that is equal to 6.022 x 10^23 atoms/mole. Plugging in the values for the number of moles and Avogadro's number, you get:

Number of atoms = 1.525 moles * (6.022 x 10^23 atoms/mole)

= 9.149 x 10^23 atoms

Therefore, there are approximately 9.149 x 10^23 atoms of potassium in 1.525 moles of potassium.

According to Avogadro's number there are 9.18×10²³ atoms of potassium  which  make up 1.525 moles of potassium.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number

In the given question number of atoms =number of moles×Avogadro's number=1.525×6.023×10²³=9.18×10²³ atoms .

Thus ,there are 9.18×10²³ atoms of potassium  which  make up 1.525 moles of potassium.

Learn more about Avogadro's number,here:

https://brainly.com/question/11907018

#SPJ1

Answer:

[tex]\huge\boxed{\sf v = 0.004\ m\³}[/tex]

Explanation:

Mass = m = 4 kg

Density of water = 1000 kg/m³ (Standard)

Volume = v = ?

Density = m/v

1000 = 4 / v

1000 × v = 4

v = 4/1000

v = 0.004 m³

[tex]\rule[225]{225}{2}[/tex]

The words that fill in the spaces in order are;

a) wavelength

b) crest

c) amplitude

d) trough

Let us now remind ourselves that what we call a wave just have to do with a disturbance that is moving in a medium and has the abilities transfer energy in the medium in which the material is moving.  We know that the distance that has been covered by the wave in the horizontal direction is what we can still be able to call the wavelength of the wave.

If we have a sketch of the wave motion, we know that the distance that is found between two successive crests or troughs is what we call the wavelength of the wave and the crests are the top positions while the troughs has to do with the downward positions. The amplitude is the maximum disturbance of the wave.

Learn more about waves:https://brainly.com/question/3639648

#SPJ1

141 g of KCIO3 break down into 1.725 moles of oxygen.

A substance's mole is equivalent to 6.022 x 10²³ of that material (such as atoms, molecules, or ions). The term "Avogadro's number" or "Avogadro's constant" refers to the number 6.022×10²³.

From equation 2KCIO3 ⇒ 2KCI + 3O2

                         (141 gm)               ( x gm)

⇒ x gm of O2 =141 g KClO3 × (1 mol KClO30)/122.5 g KClO3 × (3 mol O2)/2 mol KClO3 × (32g O2)/1 mol O2

⇒13,536/245 = 55.2 g O2

now, Number of moles of O2 = Mass of O2 / Molar mass of O2

⇒No. of moles of O2 = 55.2/32 = 1.725

To know more about Moles visit :

brainly.com/question/15209553

#SPJ1

A charge-coupled device (CCD) is a component that receives an electrical charge and transmits it to the following area.

To learn more about CCD refer

https://brainly.com/question/13047592

#SPJ4

All three titrations require the same volume of NaOH to reach the first equivalence point.

The type of acid used in the titration determines the pH of the result: a strong acid results in a pH of 7 at the titration's equivalent. Equivalence point for a weak acid is influenced by the type of conjugate base and weak acid's beginning pH. The type of the acid is another factor for a diprotic acid.

Thus:

The initial pH of all three titrations is the same, as is the pH at the first equivalence point in all three titrations. Moreover, the final pH of all three titrations is the same. of the three are FALSE.

Thus:

To reach the first equivalence point, all three titrations need the same volume of NaOH.

Learn more about equivalence point here:

https://brainly.com/question/29999744

#SPJ4

If HA is the weak acid, HB is the strong acid, and H₂C is a diprotic acid, the statement is true for the titrations is All three titrations require the same volume of NaOH to reach the first equivalence point.

The pH of the titration is depend on the nature of acid. here the the HA is the weak acid and the HB is the strong acid. the  H₂C is the diprotic acid. the diprotic acid means the acid which contains the two hydrogen atoms and will ionized in the water.

Thus, the from all the statements the true one is that All three titrations require the same volume of NaOH to reach the first equivalence point.

To learn more about titration here

https://brainly.com/question/17199543

#SPJ4

0.35 moles of carbon are needed to make 129 grams of methane, CH₄.

What is methane?
Methane is a hydrocarbon gas composed of one carbon atom and four hydrogen atoms. It is the simplest and most abundant form of organic matter found in the environment. It is an odorless and colorless gas, but is often found mixed with other gases that give it a slight smell. Methane is produced naturally by the decomposition of organic matter in the absence of oxygen, such as in wetlands or the intestines of animals. It is also produced by anaerobic bacteria, which break down organic material in the absence of oxygen. It is a major component of natural gas, which is used as a fuel source for cooking and heating. Methane is also a greenhouse gas, meaning it traps heat in the atmosphere and contributes to global warming.

To learn more about methane
https://brainly.com/question/25649765

#SPJ1

The balanced equation of the decomposition of hydrogen peroxide is as follows:

0.030 mol He x 22.4 L He = 0.672 L He

Hydrogen peroxide is a compound of hydrogen and oxygen combined in a ratio of 1 : 1.

The products of the decomposition of hydrogen peroxide are water and oxygen gas. The equation of the decomposition of hydrogen peroxide is given below:

2 H₂O₂ ----> 2 H₂O + O₂

Learn more about the decomposition of hydrogen peroxide at: https://brainly.com/question/16896544

#SPJ1

Answer:

[tex]\huge\boxed{\sf No.\ of\ moles = 0.145\ moles}[/tex]

Explanation:

No. of particles = 8.75 × 10²² units

Avogadro's number = 6.022 × 10²³

No. of moles = ?

Number of moles = No. of particles / Avogadro's number

No. of moles = 8.75 × 10²²/6.022 × 10²³

No. of moles = 1.45 × 10⁻¹

[tex]\rule[225]{225}{2}[/tex]

Answer:180.9g

Explanation:

Balance Chemical Reaction can be written as:

2Al + 3CuCl2→2AlCl3+Cu

2 mol aluminium reacts with 3mol copper chloride

therefore,

10.05moles copper chloride require=2*10.05/3 mol aluminium

=6.7mol aluminium

now, we know that 1 mol aluminium contains 27g mass

, therefore,6.7mol aluminium=6.7*27=180.9g aluminium

To learn more about the calculation of theoretical yield

https://brainly.com/question/21091465

According to the problem the enthalpy change for the reaction is 742 J.

Enthalpy is a thermodynamic quantity that measures the total heat content of a system. It is the sum of the internal energy of the system plus the product of its pressure and volume. In simple terms, it is the total amount of energy contained in a system, including the energy of its components and any energy exchanged with the environment.

The enthalpy change (ΔH) for the reaction can be calculated using the equation:
ΔH = (mass of solution x C² x ΔT) / (density of solution)
Where:
mass of solution = 31.6 g
C² = 4.2 J g-1K-1
ΔT = (21.5 – 17.0) °C = 4.5 °C
density of solution = 1.00 g/cm³
Therefore, ΔH = (31.6 g x 4.2 J g-1K-1 x 4.5 °C) / (1.00 g/cm³)
= 742 J
The enthalpy change for the reaction is 742 J.

To learn more about enthalpy
https://brainly.com/question/14047927
#SPJ1

The substances that undergo a chemical reaction are known as reactants, whilst the chemicals that are produced are known as products.

The 5 primary types of chemical reactions are:

Through a physical transition, the shape or form of the material changes, but the type of substance it contains does not. However, when there is a chemical shift, the nature of the matter changes, and at least one new material with novel features is produced. The transition between physical and chemical states cannot be bridged in a straight line.

Writing a balanced chemical equation has the goal of explaining the resulting products and reactants (end results). The ratios in which they respond allow you to calculate how many reactants you require and how many products you can produce.

Learn more about type of reaction: https://brainly.com/question/16416932

#SPJ1

The correct answer is Option 2: The overall reaction is>

The reaction of hydrogen and iodine chloride produces hydrogen iodide as an intermediate. This means that the rate of the reaction is determined by the concentrations of all three species:

The rate law, which expresses the relationship between the rate of the reaction and the concentration of the reactants, is rate = k [H2] [HI] [ICI], where k is the rate constant. This means that the rate of the reaction is proportional to the concentrations of H2, HI, and ICI.

Learn more about reaction :

https://brainly.com/question/24795637

#SPJ4