Because of the properties of nucleophiles, nucleophilic reactions constantly coexist with ______.A. radical reactions B. photochemical reactions C. acid-base reactions D. oxidation-reduction reactions

Answer:

the answer is 1

the  coefficient needed to balance this equation is 1

Explanation:

Answer:

D, They produce fossil fuels

Explanation:

you can't just pull them out of nowhere

The net charge on the sulfur atom is -0.3 μC.

We must know that an atom is composed of electrons, protons and neutrons. Th electrons are found in the orbits, the protons are found in the nucleus along with the protons. We could add a net charge to the electron by adding or removing an electron from it.

Now we are trying to obtain the net charge, in coulombs, would you place on it if you put an extra electron on 1 in 10^12 of its atoms.

We have;

1 electron/ 1 * 10^12 * -(1.6 * 10^-19)/ 1 electron * 100g * 1 mol/32 g/mol * 6.02 * 10^23 atoms/mol

= -0.3 μC

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Missing parts;

What net charge would you place on a 100 g piece of sulfur if you put an extra electron on 1 in 1012 of its atoms? (Sulfur has an atomic mass of 32.1.)

Answer: 71.76

Explanation:

Answer:

71.76

Explanation:

You plug them in the equation said there

Answer:

\(Kc\frac{(Ba3N2)(H2O)^6}{(Ba(OH)2)^3(NH3)^2}\)

Explanation:

Because kc equals products/reactants hope this helps :)

this is just 60 divided by 15, which is 4

so your answer is 4A :)

Answer:

60 divided by 15? That's 4 if that's what you're asking

Answer:

Total of 4 isomers of hepta-2,4-diene are given

Explanation:

pls mark brainliest

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Answer:

the pressure of a gas is directly proportional to its volume.

Explanation:

Robert Boyle was an Irish chemist and is famously referred to as the first modern chemist. He was born on the 25th of January, 1627 in Lismore, Ireland and died on the 31st, December 1691, London, United Kingdom.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

\( PV = K\)

\( P_{1}V_{1} = P_{2}V_{2} \)

Where;

P1 is the original pressure.

P2 is the final pressure.

V1 is the original volume.

V2 is the final volume.

This ultimately implies that, ventilation which is typically governed by Boyle's Law, which states that at a constant temperature the pressure of a gas is directly proportional to its volume.

Answer:

They grow slowly over time, they are made up of multiple organisms.

Explanation:

One polyp is one individual. A Coral is made up of several polyps. Each polyp is less than 1 centimeters but a coral is made of many polyp so the coral itself cant be 1 centimeters across.

Answer:

Im highy

Explanation:

Answer:

5.3⋅10 - 23 g

(-23 has to be small numbers above)

According to stoichiometry and molar mass concept, there are 55.34 g of oxygen in 152.21 grams of CO₂.

Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.

According to stoichiometry , if 44 g of carbon dioxide has 16 g of oxygen then, 152.21 g of carbon dioxide will have 152.21×16/44=55.34 g.

Thus there are 55.34 g of oxygen in 152.21 g of CO₂.

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Although the pKa constant is 4.8 and is a more straightforward expression, the Ka constant for acetic acid (CH3COOH) is 0.0000158 (= 10-4.8). Additionally, the strength of the acid increases with decreasing pKa values.

For instance, lactic acid has a pKa value of roughly 3.8, which indicates that it is a stronger acid than acetic acid.

Acetic acid, officially known as ethanoic acid, is an organic substance with the chemical formula CH3COOH that is acidic, colorless, and liquid (also written as CH3CO2H, C2H4O2, or HC2H3O2). Apart from water and other trace ingredients, vinegar has at least 4% acetic acid by volume, making acetic acid its primary ingredient.

The second-simplest carboxylic acid is acetic acid (after formic acid). It serves as a significant industrial chemical and reagent in the manufacture of cellulose acetate.

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Answer:

False.

Explanation:

Neutrons are neutral(no charge) but they contain mass(1.675×10⁻²⁷ kg)

Hope, this helps you.

The heat produced from the complete combustion of methane is 1,664.59 kJ.

The chemical energy from the combustion reaction is converted into thermal energy. The thermal energy or heat produced by a mole of a substance, methane, would be the same as the enthalpy of reaction/combustion.

First, we need to determine the number of moles of methane. As stated in the problem, complete combustion is achieved for 30.0g of methane. The molecular weight (MW) of methane is 16.04 g/mol.

Mole methane= mass methane/MW methane

Mol methane= 30 g / 16.04 g/mol

Mol methane= 1.87 mol

We can now multiply it by the given enthalpy of the reaction to determine the heat produced.

Heat produced= enthalpy of reaction * mol methane

Heat produced= 890 kJ/mol * 1.87 mol

Heat produced= 1,664.59 kJ

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1. To calculate the number of nanograms equivalent to 0.0078 mg, you need to multiply 0.0078 mg by the conversion factor of 1,000,000 ng/mg. The result is 7,800 nanograms (ng). 2. To convert 300 decigrams (dg) to micrograms (μg), you need to multiply 300 dg by the conversion factor of 100 μg/dg. The result is 3,000 micrograms (μg).

1. To calculate the number of nanograms equivalent to 0.0078 mg, conversion factors and the relationship between milligrams and nanograms need to be used. Direct calculation from milligrams to nanograms is not possible without considering the appropriate conversion factors.

To convert milligrams to nanograms, we need to consider the conversion factor: 1 milligram (mg) is equal to 1,000,000 nanograms (ng). By multiplying 0.0078 mg by the conversion factor (1,000,000 ng/mg), we can determine the equivalent value in nanograms.

0.0078 mg is equal to 7,800 nanograms (ng). The conversion from milligrams to nanograms requires the use of appropriate conversion factors, as the units differ by six orders of magnitude. It is essential to employ the correct conversion factors when converting between different units of measurement.

2. 300 decigrams (dg) is equal to 3,000 micrograms (μg).

To convert decigrams to micrograms, we need to consider the conversion factor: 1 decigram (dg) is equal to 100 micrograms (μg). By multiplying 300 dg by the conversion factor (100 μg/dg), we can determine the equivalent value in micrograms.

300 decigrams is equal to 3,000 micrograms. The conversion from decigrams to micrograms requires the use of the appropriate conversion factor, where decigrams are multiplied by 100 to obtain micrograms. Conversion factors play a crucial role in accurately converting between different units of measurement.

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The elements considered to be macrominerals are: i. C - Carbon, ii. Ca - Calcium and iii. Cl - Chloride

Calcium, phosphorus, magnesium, sodium, potassium, chloride, and sulfur are the macrominerals. Iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium are the trace minerals. The other elements  mentioned are:
iv. Co - Cobalt
v. Cu - Copper

While cobalt and copper are essential trace elements, they are not classified as macrominerals. Macrominerals are needed in larger amounts in the body, and calcium and chloride are among them.

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Answer:

Explanation:

Solid- When laying soccer you kick the ball, and the ball is a solid.

Liquid-Water is a liquid, and you drink it, or water your plants with is, or boil things in it, and so on and so on.

Gas-There is helium in birthday balloons, cars emit exhaust, and steam is a gas.

Answer: I think its C

Explanation: Hope it helps :)

Answer:

1093.458042 grams

Explanation:

1 mole is equal to 1 moles Nickel, or 58.6934 grams. So I think you can unsterstand how I did the math if you have any questions let me know.

Answer: (P2/P1)=(T2/T1)

(P2/1200.0kPa)=(387/283)

P2=(387K/283K) * (1200kPa)

P2= 1641kPa

Explanation:

An Oxygen Tank has a pressure of 1200 Kpa at 283K and when temp. is increased to 378 K then pressure will be 1,602.82 kpa.

From the ideal gas equation it is clear that pressure of gas is directly proportional to the temperature, and for this question required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = initial pressure of oxygen tank = 1200 kpa

T₁ = initial temperature of oxygen tank = 283 K

P₂ = final pressure of oxygen tank = ?

T₂ = final temperature of oxygen tank = 378 K

On putting values, we get

P₂ = (1200)(378) / (283) = 1,602.82 kpa

Hence resultant pressure of the oxygen tank is  1,602.82 kpa.

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Answer:

A. Oxidation-reduction

Explanation:

I assume you mean the reaction is:

Ag2NO3(aq) + Cu(s) -> 2Ag(s) + Cu(NO3)2(aq)

Either way:

Solids have the oxidation number of 0. So in the beginning of the reaction Cu(s) has the oxidation number 0, and at the end it has a oxidation number of +2. So it was oxidized.

Ag in the beginning of the reaction has the oxidation number of +1, and ends with the oxidation number of 0. It was reduced.

So its an oxidation reduction.

After the reaction, the bag's combined mass is 8.0 grams.

When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

Mass cannot be created or destroyed, under the law of conservation of mass. As a result, the mass of reactants and products must be equal. Each element must have the same number of atoms on both the reactant and product sides. Chemical equations are balanced as a result.

2.0 g + 5.0 g = 7.0 g is the mass of the reactants.

mass of the bag is 1 g.

Consequently, the weight of the products plus the weight of the bag is equal to 7.0 g plus 1.0 g, which equals 8.0 g.

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The chemical equation is balanced  when : a = 1, b = 3, c = 2, d = 2

C₂H₄   +      3O₂   ----->   2CO₂   +    2H₂O

The given equation is :

aC₂H₄   +      bO₂   ----->   cCO₂   +    dH₂O

                        reactants                  products

  C                          2                                1

  H                          4                                2

  O                         2                              2 + 1 = 3

Now , multiply by 2 in CO₂  and H₂O and 3 in O₂, we get

a = 1

b=3

c= 2

d=2

C₂H₄   +      3O₂   ----->   2CO₂   +    2H₂O

                       reactants                  products

  C                          2                                2

  H                         4                                  4

  O                         6                                  6

now all the atoms are now balanced.

Thus, The chemical formula is balanced equation  when : a = 1, b = 3, c = 2, d = 2

C₂H₄   +      3O₂   ----->   2CO₂   +    2H₂O

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There are 2.74 moles of N₂ (g) present in 1.00 L of N₂ (g) at 100°C and 1 atm.

The number of moles can be calculated using the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15 K. Thus, T = 100°C + 273.15 = 373.15 K .We also need to convert the pressure from atm to Pa by multiplying by 101,325 Pa/atm. Thus, P = 1 atm × 101,325 Pa/atm = 101,325 Pa.

We can now solve for n:

n = PV/RT = (101,325 Pa × 1.00 L)/(0.08206 L⋅atm/mol⋅K × 373.15 K) = 2.74 mol N₂ (g)

Therefore, in a 1.00 L container filled with N₂ (g) at a temperature of 100°C and pressure of 1 atm, there are 2.74 moles of N₂ (g) present

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To calculate the theoretical mass percentage of oxygen in potassium chlorate (KClO3), we need to find the molar mass of KClO3 and the molar mass of oxygen.

The molar mass of KClO3 can be calculated by adding the atomic masses of its constituent elements:

K = 39.10 g/mol

Cl = 35.45 g/mol

O = 3 x 16.00 g/mol = 48.00 g/mol

Molar mass of KClO3 = 39.10 g/mol + 35.45 g/mol + 48.00 g/mol = 122.55 g/mol

The molar mass of oxygen is 16.00 g/mol.

The percentage of oxygen by mass in KClO3 can be calculated using the formula:

(molar mass of oxygen / molar mass of KClO3) x 100

= (16.00 g/mol / 122.55 g/mol) x 100

= 13.05%

Therefore, the theoretical mass percentage of oxygen in potassium chlorate (KClO3) is 13.05%.

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Answer:

B. A rate constant

Explanation:

The mathematical expression of rate law is given below,

Rate = K[A]m[B]n

This rate law show the relationship between the rate of chemical reaction and concentration of reactants.

In given equation [A] and [B] are molar concentration of reactants while K represent rate constant.

The value of K is specific for particular reaction at particular temperature,

m and n are represent exponents and determine experimentally. The value of K is not depend upon the concentrations of reactant but depend upon the surface area and temperature

k is a rate constant in the rate law equation

The ionic composition of a neuron at rest is characterized by a relatively high concentration of intracellular K+ ions and a low concentration of intracellular Na+ ions.

At rest, the neuron's membrane potential is maintained at around -70mV, and this is due to the selective permeability of the membrane to K+ ions and the presence of K+ leak channels that allow for the passive diffusion of K+ ions out of the neuron and into the extracellular fluid.

During an action potential, there is a rapid and transient change in the ionic composition of the neuron. This change is characterized by a rapid influx of Na+ ions into the cell through voltage-gated Na+ channels, followed by a rapid efflux of K+ ions out of the cell through voltage-gated K+ channels.

After an action potential, the neuron enters a refractory period during which it is unable to generate another action potential. During this period, the neuron's membrane potential is temporarily more negative than its resting potential, due to the continued efflux of K+ ions out of the neuron through the open K+ channels.

This hyperpolarization of the neuron makes it more difficult to generate another action potential and ensures that action potentials occur in a one-way direction along the axon.

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Answer:

Para ser mas exactos una reaccion quimica es donde los reactivos se transforman en productos.

Explanation:

Durante las reacciones quimicas, ocurren ciertas transformaciones que hace que se tome o se libere energia del medio, generando que los reactivos de la reaccion, es decir los compuestos iniciales, en un determinado espacio y tiempo bajo ciertas condiciones de presion y temperatura exactas se transformen en productos.

Para la quimica, la misma cantidad de materia que se encuentra en los reactivos se mantendra en los productos, es por eso que cada reaccion quimica debe respetar las reglas de la estequiometria y estar balanceadas a la perfeccion.

Answer: They are called substances and mixtures

Explanation:

Answer:

pure substances and mixtures.

Explanation:

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.

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