a solution of 0.2 m acetate ion and 0.1 m acetic acid would give a ph of 5.1. what is the value of the equilibrium constant k for the acetic acid?

Answer:

food we eat turns into energy in our body, we grow etc is an chemical change

Short-term savings strategies are designed to allow a person to improve his or her financial education and set aside some money to deal with unexpected expenses.

The planning used for the process of money saving is called saving strategy.

Short term savings are the money saved for the small interval of time which can be used in coming month or year.

These savings strategies help a person to understand the financial planning tricks. People can save this money for their unexpected expenses which coming in next months.

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Answer:b

Explanation:

Answer:

see answer

Explanation:

DO the postulates of Daltons atomic theory explain the law of conservation of mass and the law of constant composition.

1. Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed or divided any further.

2. All atoms of a single pure element are the same in size and mass

3. Atoms of different elements vary from each other in size and mass.

4. Compounds are produced through different simple whole-number combinations of atoms to produce molecules.  

5. Anywhere a compound exists, it will have the same atoms in the same ratio.

6. A chemical reaction between compounds is a re-arrangement of atoms

The law of conservation of mass is shown in 2, 4. and 5.

The law of constant co,position is shown in 2, 4, 5, and 6

To "fix" hydrogen means to convert it from its gaseous form (H₂) into a chemically usable form or compound.

Fritz Haber's method for fixing hydrogen, known as the Haber-Bosch process, involves combining hydrogen (H₂) with nitrogen (N₂) from the air to produce ammonia (NH₃) through a catalytic reaction. This ammonia can then be used to produce fertilizers, explosives, and other important chemicals.

Fritz Haber's method is considered the most important invention of the twentieth century because it revolutionized agriculture and food production. The production of ammonia-based fertilizers made it possible to significantly increase crop yields, addressing global food shortages and supporting a growing population.

This process had a profound impact on global agriculture and played a crucial role in the Green Revolution, which helped alleviate hunger and improved living standards worldwide.

Additionally, the Haber-Bosch process also enabled the production of synthetic materials, such as plastics and fibers, that have transformed various industries and contributed to technological advancements.

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Answer:

1=B

2=A

3=A

Explanation:

Any subsatance with a ph of less than 7 is acidic.

Bases measure over 7

The glycerol and lauric acid molecules combine and will form triglycerides or the Trilaurin.

Trilaurin is the triglyceride obtained by the formal acylation of the three hydroxy groups of the glycerol by the lauric acid (dodecanoic) acid. This is the  triglyceride and the dodecanoate ester.

Glycerol is the naturally occurring alcohol with the formula of C₃H₈O₃.  Lauric Acid is the saturated medium chain of the fatty acid with the  12-carbon backbone. The formula is C₁₂H₂₄O₂. The Triglycerides is the type of fat (lipid) that is found in the blood. When we eat, the body will converts the calories. The glycerol and the lauric acid fors the triglycerides.

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Answer:

Couldn't figure out how to edit the other one to attach the image, but here is it with the labels. Also put the same explanation down below so you don't have to go to the other if you wanted to look at it in conjunction with the image.

Explanation:

Mass extinctions are periods of time where the organisms are essentially wiped out in an extremely brief period of time. You can see how the species just drops off. Adaptive radiation occurs when there is a diversification of a group of organisms as evident by the rise in the number of marine animal groups shown by the bracketed area.

Answer:

relative humidity

Explanation:

Answer:

When we burn fuels, it begins a process called combustion. Combustion is where you burn a fuel in the presence of an oxidant like oxygen. Heat is produced, because the bonds in the fuel store more energy than the bonds in the water and carbon dioxide that are the products of combustion.

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Isomers are defined as molecules with the same chemical formula but different structures. The correct answer is vi.

Isomers are molecules that have the same chemical formula, meaning they have the same types and numbers of atoms, but they differ in their arrangement or connectivity of atoms.

This results in different structural arrangements and, in turn, different chemical and physical properties. Isomers can have different functional groups, spatial arrangements, or bond connectivity while maintaining the same chemical formula.

These differences in structure can lead to variations in reactivity, biological activity, and other properties of the molecules.

Option i and ii are incorrect because they refer to isotopes, which are atoms of the same element with different numbers of neutrons.

Option iii is incorrect as it describes molecules with different chemical formulas but similar biological functions.

Option iv is incorrect as it describes stereoisomers, which have the same three-dimensional structure but differ in spatial arrangement.

Option v is incorrect as it describes elements with the same number of electrons in the outer shell, which are known as isotopes.

Therefore, the correct option is vi. molecules with the same chemical formula but different structures.

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Answer:

all of them

Explanation:

took test

Floods can cause soil erosion and sedimentation. It will destroy all the properties of human beings. All the options are correct. Thus the correct option is D.

Flood is defined as a natural disaster which results from the overflow of water on land. It is mainly generated by the heavy rainfall, sudden snow melt, etc. It affect the ecosystem adversely.

The floods are mostly affected to the coastal regions. It is even a threat to life of people. The habitat of aquatic organisms are destructed by the floods. The ground water is found to be contaminated with pathogenic microbes and causes water borne diseases.

As a result of floods the life of small insects which play a primary role in the ecosystem of food chain is also affected. All fields like education, communication, transport, etc. of our state is affected by the floods.

The floods can cause loss of people, low water quality, destruction of habitats. Some times the effect of flood in our life will be long lasting.

Thus the correct option is D.

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Answer:

weight = newton

mass = kilogram

volume = cubic meter

density = kilogram per cubic meter

Answer:

weight hghhiixjdhdhbdnfnfjfjjcndndnfmckkxkx

Answer:

The reaction between methane and oxygen to yield carbon dioxide and water (shown at bottom) may be represented by a chemical equation using formulas (top).

Explanation:

The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation.

The substances generated by the reaction are called products, and their formulas are placed on the right sight of the equation.

Plus signs (+) separate individual reactant and product formulas, and an arrow (⟶) separates the reactant and product (left and right) sides of the equation.

The relative numbers of reactant and product species are represented by coefficients (numbers placed immediately to the left of each formula). A coefficient of 1 is typically omitted.

Lewis structure of CN - has a triple bond between the carbon and nitrogen atoms and one lone pair on each of the carbon and nitrogen atoms.

Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the interactions of atoms inside molecules as well as any lone pairs of electrons that may be present. Every molecule with a covalent link, as well as coordination compounds, can have a Lewis structure. Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name.

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The element is Neon
The protons is the same as the atomic number (10 protons)
The electrons are the same as the number of protons in a neutral atom (10 electrons)
The neutrons can be found by subtracting the protons from the atomic mass (22-10=12 neutrons)

Answer: download socratic for those type of answer it will give you GREAT ANSWERS !!

Explanation:

if a co pressure of 150 torr is to be employed in the furnace and total pressure never exceeds 760 torr, will reduction occur in forward direction.

for thus equilibrium, the expression for Kp is :

Kp = P(co2) / P(co) = 6.0 * 10^2

If P(CO)=150 torr,

because the maximum pressure is 760, P(CO2)=760-150-610. Under Lose conditions,

the reaction quotient, Q=610/150 = 4.1

Since Q is much less than Keq. The reaction will proceed in the forward direction, and NiO will be reduced to Ni.

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The type of bond that will form between carbon and hydrogen is covalent bond.

Covalent bond is a type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.

In chemistry, the carbon-hydrogen bond (C−H bond) is a chemical bond between carbon and hydrogen atoms that can be found in many organic compounds. This bond is a covalent, single bond.

It can be formed because carbon shares its outer valence electrons with up to four hydrogen atoms.

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Answer:

CO32-(aq) + 2H+(aq) → CO2(g) + H2O(l)

Explanation:

According to this question, sodium carbonate reacts with sulfuric acid to form aqueous sodium sulfate, carbon dioxide and water. The balanced chemical equation is as follows:

Na2CO3(aq) + H2SO4(aq) → Na2SO4(aq) + CO2(g) + H2O(l)

- Next, split compounds that are aqueous into ions.

2Na+(aq) + CO32-(aq) + 2H+(aq) + SO42-(aq) → 2Na+(aq) + SO42-(aq) + CO2(g) + H2O(l)

- Next, we cancel out the spectator ions, which are ions that remain the same in the reactants and products side of a chemical reaction. The spectator ions in this equation are 2Na+(aq) and SO42-(aq).

CO32-(aq) + 2H+(aq) → CO2(g) + H2O(l)

- Hence, the balanced ionic equation is as follows:

CO32-(aq) + 2H+(aq) → CO2(g) + H2O(l)

In a balanced equation the No of atoms on the left-hand side equals No of atoms on the right-hand side

Chemical formulas and symbols are used to express a chemical reaction in a chemical equation. A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.

For the chemical equation to adhere to the rule of conservation of mass, it must be balanced. A chemical equation is said to be balanced when the number of various elemental atoms on the reactants and products sides are equal.

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0.948 mg of chloramine will be found in one cup of drinking water if the concentration is 4.0 ppm.

It is given that concentration of chloramine is 4.0 ppm which equals two 4 mg per litre. It is assumed that one cup of drinking water has a volume of 237 ml.

To calculate the amount of chloramine in one cup of drinking water:

237ml = 0.237L

4.0 ppm = 4g/L of chloramine

Mass of Chloramine in 0.237L = 4 grams/L* 0.237L

Mass of Chloramine = 0.948grams

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Answer:

Explanation:

To calculate the mass of sodium azide needed to fill a 48dm³ air bag with gas at r.t.p., you need to use the ideal gas law. The ideal gas law states that the pressure of a gas is directly proportional to its temperature (in Kelvins) and the number of moles of gas present, and inversely proportional to its volume. The ideal gas law can be expressed as:

PV = nRT

Where:

- P is the pressure of the gas

- V is the volume of the gas

- n is the number of moles of the gas

- R is the ideal gas constant

- T is the temperature of the gas

You can rearrange the ideal gas law to solve for the number of moles of gas present:

n = PV / RT

To solve this problem, you need to plug in the known values. At r.t.p., the pressure is 1 atm, the temperature is 273 K, and the volume is 48 dm³. The ideal gas constant is 8.31 J/mol*K. Plugging in these values, you get:

n = (1 atm * 48 dm³) / (8.31 J/mol*K * 273 K)

Solving for n, you get:

n = 0.0174 moles

Now that you have the number of moles of gas present, you can use the balanced chemical equation for the decomposition of sodium azide to calculate the number of moles of sodium azide needed. The balanced chemical equation is:

2 NaN3 (s) → 2 Na(s) + 3 N₂ (g)

This equation tells you that for every 2 moles of sodium azide that decompose, you get 3 moles of nitrogen gas. Since you need 0.0174 moles of nitrogen gas, you can divide that number by 3 to get the number of moles of sodium azide needed:

0.0174 moles N₂ / 3 moles N₂/2 moles NaN3 = 0.0087 moles NaN3

To convert the number of moles to mass, you need to know the molar mass of sodium azide. The molar mass of sodium azide is 65.01 g/mol. Plugging in the number of moles and the molar mass, you get:

0.0087 moles NaN3 * 65.01 g/mol = 0.5686 g NaN3

So, the mass of sodium azide needed to fill a 48dm³ air bag with gas at r.t.p. is approximately 0.5686 grams.

The formulas for the substances and designate their physical states as follows:

a. nitrogen dioxide gas NO₂(g)

b. liquid gallium  GA (I)

c. barium chloride dissolved in water BaCI₂ (aq)

d. solid ammonium carbonate (NH₄) 2CO₃ (s)

The term chemical formula is defined as an expression that presents the elements in a compound and the relative proportions of those elements.

If only one atom of a particular type is present, no subscript is used. For atoms that have two or more of a particular type of atom present, a subscript is written after the symbol for that atom.

It presents the constituent element and the number of atoms of each element present in one molecule of the compound. It also corresponds to the molecular mass of the compound.

Thus, The formula of nitrogen dioxide gas is NO₂(g).

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Answer:

8.677

⋅

10

8

g

Explanation:

You most likely have such a Gram-positive infection if the organism can use sodium citrate as its only source of carbon and produces acetoin carbinol in the broth.

A little amount of sodium is needed by the human body to convey nerve signals, contract and relieve muscle, and keep the right ratio of water & minerals. We are thought to require 500 sodium mg everyday for these essential processes.

Bananas are a crucial part of heart-healthy diets as DASH (Dietary Approaches to Decrease Hypertension), which aims for roughly 4,700 mg of dietary potassium daily and are packed with potassium, fiber, and low sodium.

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The unknown chemical : Nitrogen gas : N₂

Given

1 mole of the unknown chemical

mass = 28 g

Required

The unknown chemical

Solution

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

mol = mass : molecular weight

Molecular weight(MW) = mass : mol

MW=28 g : 1 mol

MW= 28 g/mol

Because this compound is diatomic, it consists of 2 elements of the same type, so this element has a mass number:

28: 2 = 14

The element having the mass number 14 is N

Answer:

Explanation:

It is not possible to determine if the two substances obtained from different sources that melt at 148-150 degrees celsius are the same based on just their melting point alone. Melting point is a physical property that is widely used as an indicator of chemical purity and identity, however, it is not a definitive test. Two different compounds can have the same melting point.

Melting point is affected by many factors, such as pressure and impurities, which can cause variations in the melting point of a substance. Additionally, polymorphs (different forms of the same substance) can have different melting points.

In order to determine if the two substances are the same, additional tests such as spectroscopy, chromatography, and chemical analysis would be needed to confirm their chemical identity.

Two substances are not always the same only because they melt at the same temperature (148–150°C). A physical attribute of a material that can be utilised as a distinguishing factor is melting point.

It does not follow that two substances that melt at the same temperature (148–150°C) are the same. The physical feature of melting point can be used to identify a material, but it is not the sole factor in determining chemical identification. To compare two substances, it is necessary to take into consideration additional characteristics including chemical composition, solubility, density, and interactions with other compounds. Additionally, compounds with identical melting points can be found in several chemical families and may have various chemical and physical characteristics. In order to validate the chemical identity of two compounds received from various sources, further investigation, such as infrared spectroscopy, X-ray diffraction, or chromatography, may be required.

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