1.6 g of acetic acid (CH3COOH) is dissolved in 250 mL of water to create an acidic solution. What volume of a 0.38 M calcium hydroxide solution is required to completely neutralize the acidic solution? State your answer in mL

The mass of Fluorine in grams in the second sample is 2066 g. The concept law of definite proportions is used here to obtain the mass of Fluorine in the second sample.

This law was stated by a French chemist, Louis Proust. It states that 'a chemical compound always contains the same elements combined together in the same proportion by mass'.

The mass of Mg in sample 1 is 1.66 kg and that of F is 2.56 kg. The mass of Mg in sample 2 is 1.34 kg and we have to find out the mass of F in second sample.

The mass of Fluorine in sample 2 can be obtained by using the mass ratio of the elements in sample 1.

In sample 1:

Mass of magnesium ÷ Mass of Fluorine = 1.66 kg ÷ 2.56 kg

In sample 2:

By using dimensional analysis,

Mass of Fluorine = 2.56 kg Fluorine ÷ 1.66 kg Magnesium × 1.34 kg Magnesium

Therefore the mass of Fluorine = 2.066 kg

The mass in kilogram can be converted into grams as:

Mass of Fluorine = 2.066 kg × 1000 g ÷ 1 kg = 2066 g

Thus the mass of Fluorine in the second sample is 2066 g.

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Answer:

There are no oxygen atoms in one molecule of serotonin. Serotonin (5-hydroxytryptamine) is a monoamine neurotransmitter that is composed of carbon, hydrogen, and nitrogen atoms. Its chemical formula is C10H12N2O.

Explanation:

Answer:1 atom

Explanation: it’s at the end of the molecule

Answer: Kinetic energy stays the same, and potential energy decreases.

Explanation:

During the phase changes of a cooling curve, the KE remains constant while PE decreases (heat is lost during cooling) to allow the molecules to move closer together and IMF increases

Answer:

100%

Explanation:

since both genotypes are dominant, and one of them is YY, all of the offspring will be yellow.

Answer:

NaHCO3

Explanation:

The three is small at the bottom at the end

For a 3.00 M solution of KOH : the H⁺ , pH, pOH and OH⁻ is given as : Omit molarity units :

[H⁺] = 1.39

pH = 14.47

pOH = -0.47

[OH⁻] = 3

given that :

KOH = 3.00 M

the KOH is the strong base , that means it will completely dissociates is given as follows :

KOH  --->   K⁺   +  OH⁻

[OH⁻] = 3.00 M

The pOH expression is given as :

pOH = - log  [OH⁻]

        = - log (3)

        = -0.47

The pH expression is given as :

pH = 14 - pOH

     = 14 + 0.47

      = 14.47

the [H⁺]  expression is given as :

pH = - log [H⁺]

[H⁺] = 10 ^-14.47

[H⁺]  = 1.39 M    

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A conjugate acid-base pair is represented by H2CO3, HCO3.

Option d is correct.

A conjugate acid-base pair is a pair of substances that differ exclusively in the presence of a proton (H+) according to the Brnsted-Lowry definition of acids and bases. A proton given to a base creates a conjugate acid, while a proton taken away from an acid creates a conjugate base.

H2CO3 is created by adding CO2 and water. The hydrogen carbonate ion, which is the same thing, is created when the carbonic acid dissociates, producing a proton (H+) and bicarbonate ion (HCO3(1-)). Since the dissociation's end result is the bicarbonate ion, it is the conjugate BASE.

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Answer: 78.59 lb/ft

Explanation:

use stoichiometry to solve

1.26g/cm x ( 1pound/ 454 grams) X (28317 Cm/1 ft) =  78.59 pounds/ft

The empirical formula of the compound is C₂H₁₆S₂N₃O.

The moles of each element is as follows::

For CO₂:

Carbon (C) has a molar mass of 12.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of C in CO₂ = 2.08 g / 12.01 g/mol = 0.173 moles

Moles of O in CO₂ = 2.08 g / 16.00 g/mol = 0.130 moles

For H₂O:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in H₂O = 1.28 g / 1.01 g/mol = 1.27 moles

Moles of O in H₂O = 1.28 g / 16.00 g/mol = 0.080 moles

For SO₃:

Sulfur (S) has a molar mass of 32.06 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of S in SO₃ = 4.77 g / 32.06 g/mol = 0.149 moles

Moles of O in SO₃ = 4.77 g / 16.00 g/mol = 0.298 moles

For HNO₃:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Nitrogen (N) has a molar mass of 14.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in HNO₃ = 3.48 g / 1.01 g/mol = 3.45 moles

Moles of N in HNO₃ = 3.48 g / 14.01 g/mol = 0.248 moles

Moles of O in HNO₃ = 3.48 g / 16.00 g/mol = 0.217 moles

The simplest whole-number ratio of the elements will be:

Carbon: 0.173 moles / 0.080 moles ≈ 2.16

Hydrogen: 1.27 moles / 0.080 moles ≈ 15.88

Sulfur: 0.149 moles / 0.080 moles ≈ 1.86

Nitrogen: 0.248 moles / 0.080 moles ≈ 3.10

Oxygen: 0.080 moles / 0.080 moles = 1

Therefore, the empirical formula is C₂H₁₆S₂N₃O.

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Explanation:

charges is +2

elements is CALCIUM

Symbol is Ca++

Answer:

1120 gm

Explanation:

6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)

(a) Balance the equation.

(b) How many grams of oxygen are required to react with 10 moles of ethane for a complete

combustion reaction?

FIRST, CORRECT THE EQUATION THEN BALANCE

2C2H6(G) + 7O2------------>  4CO2  + 6H2O

so for 10 moles of ethane, we need

7 X 5 = 35 MOLES O2

=35 MOLES O2

O2 HAS A MOLAR MASS OF 2X16 = 32 gm

35 MOLES OF O2 HAS A MASS OF 35 X 32 =1120 gm

Answer:

shell and negative

Explanation:

atoms have two parts the necules part and the shell part electron found on the shell

Electrons are found in shells/orbitals of the atoms and have a negative charge.

Therefore, the volume of 1.20 M FeCl₂ required to obtain 0.850 moles of Cl⁻ ions is 0.354 L.

What is Moles?

One mole of a substance is defined as the amount of that substance that contains the same number of entities, such as atoms, molecules, or ions, as there are in 12 grams of carbon-12. This number, known as Avogadro's number, is approximately 6.022 x 10²³.

The molecular formula for FeCl₂ shows that it contains 2 chloride ions (Cl⁻) for each FeCl₂ molecule. Therefore, the number of moles of Cl⁻ ions is twice the number of moles of FeCl₂.

Given that we want to obtain 0.850 moles of Cl⁻ ions, we can calculate the number of moles of FeCl₂ required as follows:

moles of FeCl₂ = 0.850 moles Cl⁻ ions / 2 = 0.425 moles FeCl₂

To calculate the volume of 1.20 M FeCl₂ required to obtain 0.425 moles, we can use the formula:

moles = concentration (in M) x volume (in L)

Rearranging this formula to solve for volume, we get:

volume (in L) = moles / concentration (in M)

Substituting the values we have, we get:

volume (in L) = 0.425 moles / 1.20 M = 0.354 L

Therefore, the volume of 1.20 M FeCl₂ required to obtain 0.850 moles of Cl⁻ ions is 0.354 L.

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We can produce more products by;

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

Water is created through an exothermic process. Heat energy is released when hydrogen gas (H2) and oxygen gas (O2) mix to make water (H2O). An exothermic reaction is characterized by this energy release.

The reaction's overall energy change is negative, which shows that energy is released. The reaction is exothermic because the extra energy is released as heat into the environment.

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Missing parts;

Water can be made using the reversible reaction shown. Which change would

keep this reaction from shifting to form more of the product?

2H₂+022H₂O + energy

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

D. Increasing the temperature in the reaction vessel

Answer: 0.0086 moles of hydrogen are produced.

Explanation:

According to ideal gas equation:

\(PV=nRT\)

total pressure = 755.2 mm Hg

pressure of water at \(22^0C\) =  19.8 mm Hg

P = pressure of hydrogen = (755.2-19.8) mm Hg = 735.4 mm Hg = 0.97 atm  

(760 mm Hg = 1atm)

V = Volume of gas = 215.8 ml = 0.2158 L

n = number of moles

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(22.0^0C=(22.0+273)K=295K\)

\(n=\frac{PV}{RT}\)

\(n=\frac{0.97atm\times 0.2158L}{0.0821 L atm/K mol\times 295K}=0.0086moles\)

Thus 0.0086 moles of hydrogen are produced.

Answer:

we can't see the diagram

Answer:

magma

Explanation:

brainly me and il give reason in comment

The synthesis of ch3oh(g) from co(g) and h2(g). The value of kc for the reaction at 483 k is 14.5. a 1.0 mol sample of co(g) and a 1.0 mol sample of h2 (g) are pumped into a rigid. [CH3OH] = 14.5 M is true at equilibrium.

The synthesis of CH3OH(g) from CO(g) and H2(g) is represented by the following equilibrium equation:

CO(g) + 2H2(g) <---> CH3OH(g)

The equilibrium constant (Kc) for this reaction at a temperature of 483 K is 14.5. This means that at equilibrium, the concentration of CH3OH(g) in the reaction vessel will be 14.5 times greater than the combined concentrations of CO(g) and H2(g). If a 1.0 mol sample of CO(g) and a 1.0 mol sample of H2(g) are pumped into a rigid, previously evacuated 2.0 L reaction vessel at 483 K, the initial concentrations of CO(g) and H2(g) will be 0.5 mol/L for each gas. The initial concentration of CH3OH(g) will be zero, as the reaction has not yet reached equilibrium. At equilibrium, the concentrations of CO(g), H2(g), and CH3OH(g) in the reaction vessel will be in a ratio of 1:2:1, as indicated by the coefficients in the equilibrium equation. The concentration of CH3OH(g) at equilibrium will be 14.5 times greater than the combined concentrations of CO(g) and H2(g), or 14.5 x (0.5 mol/L + 0.5 mol/L) = 14.5 x 1.0 mol/L = 14.5 mol/L.

Based on these calculations, the correct statement is:

(c) [CH3OH] = 14.5 M

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The name given to the group delimited in the image is ethyl.

It is a hydrocarbon from the alkyl functional group.

Ethyl is a substituent derived from ethane. The formula for ethane is \(C_2H_6\), whereas, ethyl has one H less than ethane.

Thus, the formula for ethyl  is \(C_2H_5\).

Looking at the delimited portion of the image, 2 C atoms in C-C bond are bonded by 5 H atoms.

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The mass (in grams) of chlorine gas is needed to react with 251 grams of iron is 479 grams. Option C.

To determine the mass of chlorine gas needed to react with 251 grams of iron, we need to use the stoichiometry of the balanced chemical equation:

2Fe + 3Cl2 → 2FeCl3

From the balanced equation, we can see that 2 moles of iron (Fe) react with 3 moles of chlorine gas (Cl2) to produce 2 moles of iron(III) chloride (FeCl3).

To calculate the mass of chlorine gas, we can follow these steps:

Step 1: Convert the given mass of iron (Fe) to moles.

Using the molar mass of iron (Fe), which is approximately 55.85 g/mol, we can calculate the number of moles of iron:

moles of Fe = mass of Fe / molar mass of Fe

moles of Fe = 251 g / 55.85 g/mol

moles of Fe ≈ 4.5 mol (rounded to one decimal place)

Step 2: Use the mole ratio from the balanced equation to find the moles of chlorine gas (Cl2) needed.

From the balanced equation, we know that 2 moles of Fe react with 3 moles of Cl2. Therefore, the moles of Cl2 can be calculated as:

moles of Cl2 = (moles of Fe / 2) * 3

moles of Cl2 = (4.5 mol / 2) * 3

moles of Cl2 ≈ 6.75 mol (rounded to two decimal places)

Step 3: Convert the moles of chlorine gas to grams.

Using the molar mass of chlorine gas (Cl2), which is approximately 70.90 g/mol, we can calculate the mass of chlorine gas:

mass of Cl2 = moles of Cl2 * molar mass of Cl2

mass of Cl2 = 6.75 mol * 70.90 g/mol

mass of Cl2 ≈ 479 grams (rounded to the nearest whole number) Option C is correct.

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Based on the Law of Conservation of Mass, the mass of products form when baking soda decomposes is 168 g/mole.

Law of conservation of mass is defined as chemical reactions and physical changes cannot build or remove mass in an isolated system. The mass of the reactants and products in a chemical reaction must equal each other according to the law of conservation of mass.

\(\rm 2NaHCO_3 \rightarrow Na_2CO_3 + H_2O + CO_2\)

Mass of baking soda = 2 x molar mass

Molar mass of NaHCO₃ = 84.007 g/mole

Mass of baking soda = 2 x 84.007 g/mole

Mass of baking soda =  168.014 g/mole ≅ 168 g/mole

Thus, based on the Law of Conservation of Mass, the mass of products form when baking soda decomposes is 168 g/mole.

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Answer:

Explanation:

Structural Levels of the body:
a. Characteristics of Living Things: Living things exhibit certain characteristics such as the ability to grow, reproduce, respond to stimuli, and maintain homeostasis.
b. Cell Specialization: Cells in the body are specialized to perform different functions such as muscle cells for movement, nerve cells for communication, and red blood cells for carrying oxygen.

Skeletal and Muscular System:
a. The Skeletal System: The skeletal system provides support, protection, and movement for the body. It is composed of bones, cartilage, and ligaments.
b. The Muscular System: The muscular system allows movement of the body and helps in maintaining posture. It is composed of muscles, tendons, and ligaments.

Food and Nutrition:
a. Food Pyramid: The food pyramid is a guide for healthy eating that emphasizes the importance of a balanced diet including fruits, vegetables, grains, protein, and dairy.

Digestive System:
a. Enzymes: Enzymes are proteins that help in breaking down food into simpler forms for absorption in the body. They are produced by different organs in the digestive system such as the pancreas, stomach, and small intestine.

Circulatory System:
a. Circulation: The circulatory system is responsible for the transport of blood and nutrients throughout the body. It consists of the heart, blood vessels, and blood.
b. Heart: The heart is a muscular organ that pumps blood to different parts of the body.
c. Blood Vessels: Blood vessels include arteries, veins, and capillaries that transport blood to and from the heart.

Respiratory System:
a. Respiration: Respiration is the process of inhaling oxygen and exhaling carbon dioxide. The respiratory system is responsible for this process and includes the nose, trachea, bronchi, and lungs.

Answer:

C. 25 m

Explanation:

Answer:

D. 30 metres

Explanation:

25 rounded to one significant figure is 30 because the unit is 5 so you round up to 30

:)

In this equation, two molecules of aluminum hydroxide react with three molecules of sulfuric acid to produce one molecule of aluminum sulfate and six molecules of water.

What is Molecules?

A molecule is a group of two or more atoms that are chemically bonded together. Atoms can combine to form molecules by sharing electrons between them, forming a covalent bond. Molecules can also be formed by the attraction between oppositely charged ions, known as ionic bonding.

Molecules can be made up of atoms of the same element or atoms of different elements. For example, oxygen gas (O2) is a molecule made up of two oxygen atoms, while water (H2O) is a molecule made up of two hydrogen atoms and one oxygen atom.

The balanced chemical equation for the reaction between aluminum hydroxide and sulfuric acid is:

2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O

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11.) Non polar, equally, Charged.

12.) Ionic, Cation, Positive, anion, negative

13.) electronegative, Polar

14.) So

15. weak, HCl or N2

A covalent bond between C and H is Non Polar. It is called that,because electrons are shared Equally between these two atoms.C and H,are not Charged

12. An Ionic bond is formed when an electron is transferred from one atom to another.

The atom that loses an electron is called Cation and has charge positive. The

atom that gains an electron is called anion and has negative charge.

13. A hydrogen bond is formed between a H in one molecule and an Electronegative atom in

another molecule. The H can make an H-bond only if it is found in a Polar covalent

bond, in its own molecule.

H-bonds give So many of its special properties.

A van der Waals interaction is the Weak type of bond. All molecules form these

bonds. These interactions become important when found in great numbers. The often help the

3D shape of large molecules such as HCL or N2

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The rate constant of the reaction is 0.025 M-¹-min-¹

We know that a second order reaction is the kind of reaction in which the order of reaction depends on two molecules or that the rate of reaction depends on the concentration of a specie raised to power 2.

Given that the general formula for the second order rate law is;

Rate = K[X]^2

K = rate constant

[X] = concentration of X

This can now extrapolated to the reaction that we have here and this is a model that would give us the rate constant.

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The student pulling out the pH electrode from the titration beaker and rinsing it off with DI water into a waste container several times during the titration will not significantly affect the measured equivalent mass.

This is because the equivalent mass of a substance is determined by the stoichiometry of the reaction, which is not influenced by the pH electrode or the rinsing process. However, it is important to note that if the student is rinsing the electrode with a significant amount of water, it could dilute the solution and affect the accuracy of the titration. Therefore, it is recommended to use a minimal amount of water during the rinsing process to minimize any potential dilution effect.

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