Consider the following Lewis bases. When reacted with 2-bromopropane, which would give predominantly a substitution product?
1) NaCN
2) NaOC(CH3)3

Answer:

Acetic acid (CH3COOH), also called ethanoic acid, the most important of the carboxylic acids. A dilute (approximately 5 percent by volume) solution of acetic acid produced by fermentation and oxidation of natural carbohydrates is called vinegar; a salt, ester, or acylal of acetic acid is called acetate.

Answer:

the acid that gives vinegar its characteristic taste. The pure acid is a colourless viscous liquid or glassy solid.

Explanation:

HOPE IT HELPS YOU......

Answer:

Disturbance

Explanation:

I believe it is Disturbance because waves are normally caused by wind, and wind classifies as Disturbance.

We need 1.8 moles of sodium metal to make 3.6 moles of sodium chloride. The answer is (C) 1.8.

The balanced chemical equation tells us that 2 moles of Na react with 1 mole of Cl2 to form 2 moles of NaCl.

Therefore, to determine how many moles of Na are needed to make 3.6 moles of NaCl, we need to use stoichiometry. We can set up a proportion based on the mole ratios in the balanced equation:

2 moles Na / 2 moles NaCl = x moles Na / 3.6 moles NaCl

Simplifying the equation gives:

x = 1.8 moles Na

Therefore, we need 1.8 moles of sodium metal to make 3.6 moles of sodium chloride. The answer is (C) 1.8.

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Answer:

Unwashed hands: This sample swab will have the most bacteria growth, as the bacteria has not been cleaned or Removed at all from this person‘s hands.

Regular Soap: Soap is meant to remove bacteria, not kill it. So by swabbing  her hands after washing with regular soap , this technique will not be very effective. This also depends on if the soap is antibacterial or not. By wiping your hand, it may just move the bacteria.

Re-Swabbing: this will have almost the same exact effect as the first experiment. There may be a minute difference between unwashed hands and re-wiping unwashed hands.

Hand sanitizer: hand sanitizer is meant to kill bacteria, not move it, so this should have the least bacteria/virus beings on this swab. Alcohol based hand sanitizer is the most effective, and should kill 99.99 percent of germs. However, you have to wait atleast a minute before swabbing to let hand sanitizer work.

Explanation: I looked it up! :) hopefully this is helpful, please let me know! Have a great day:)

The correct option from the given statements concerning mixtures is (d) more than one correct response.

The statement (a) "The composition of a homogeneous mixture cannot vary" is incorrect as the composition of a homogeneous mixture can vary. For example, a mixture of salt and water is homogeneous and its composition can vary depending on the amount of salt and water mixed in it.

The statement (b) "A homogeneous mixture can have components present in two physical states" is correct. Homogeneous mixtures are mixtures that are uniform throughout their composition, meaning that there is no visible difference between the components of the mixture. For example, a mixture of ethanol and water is homogeneous and its components are present in two physical states (liquid and liquid).

The statement (c) "A heterogeneous mixture containing only one phase is an impossibility" is incorrect. A heterogeneous mixture is a mixture where the components are not evenly distributed and the mixture has different visible regions or phases. However, it is possible for a heterogeneous mixture to contain only one phase. For example, a mixture of oil and water is heterogeneous but can have only one phase.

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Answer: A

Explanation: A

Answer:

Excellent question

Explanation:

In order to clarify the hypothesis it is important

Thomas Paine once said it is only error and not truth that shrinks from inquiry. He meant that the more you inquire about something, less error and mistakes come from it, and more truth will.

It means that you can not make a problem worse by inquiring about it but you can only lessen the error within it. Thomas Paine was likely referring to the idea that truth has nothing to fear from examination or investigation, whereas error does. In other words, if a belief or idea is true, it should be able to withstand scrutiny and examination. On the other hand, if a belief is based on error, it will crumble when subject to inquiry.

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Answer:

0.8 mph

Explanation:

36 cm         1 m              1 km          0.62 mi       60 sec       60 min         0.8 mi

---------- X ------------ X ------------- X -------------- X ------------ X -------------- =  -----------

  sec         100 cm      1000 m          1 km             min            1 Hr              Hr

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 768 g

volume = 24 cm³

We have

\(density = \frac{768}{24} \\ \)

We have the final answer as

Hope this helps you

Answer:

The density of wood is 32 g/cm³.

Explanation:

Given data:

Mass of wood = 768 g

Volume of wood = 24 cm³

Density of wood = ?

Solution:

Density is equal to the mass divided by its volume.

Formula:

d = m/v

d = density

m = mass

v = volume

d = 768 g/ 24 cm³

d = 32 g/cm³

The density of wood is  32 g/cm³.

The percent by mass of CH3COOH in the solution is 99.51%.
The percent by mass of CH3COOH in the solution can be calculated using the following formula:
% by mass = (mass of solute / mass of solution) x 100

First, we need to find the mass of the solute (CH3COOH) and the mass of the solution. We can use the given density and molarity to find these values.
Density = mass / volume
1.05 g/mL = mass / (1000 mL)
Mass of solution = 1050 g
Molarity = moles of solute / volume of solution
17.4 M = moles of solute / (1000 mL)
Moles of solute = 17.4 mol

Next, we need to convert moles of solute to grams of solute using the molar mass of CH3COOH (60.05 g/mol).
Mass of solute = moles of solute x molar mass
Mass of solute = 17.4 mol x 60.05 g/mol
Mass of solute = 1044.87 g

Finally, we can plug these values into the formula for percent by mass and solve.
% by mass = (mass of solute / mass of solution) x 100
% by mass = (1044.87 g / 1050 g) x 100
% by mass = 99.51%

Therefore, the percent by mass of CH3COOH in the solution is 99.51%.

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To calculate the number of moles of salt in one tablespoon, we can use the following formula:

Number of moles = Mass of substance / Molecular weight

The mole concept is a convenient method of expressing the amount of a substance. Any measurement can be broken down into two parts – the numerical magnitude and the units that the magnitude is expressed in..

Given that the mass of salt in one tablespoon is 6.37 grams and the molecular weight of salt (NaCl) is 58.5 g/mol, we can substitute these values into the formula:

Number of moles = 6.37 g / 58.5 g/mol

Calculating this expression, we find:

Number of moles = 0.109 moles

So, there are approximately 0.109 moles of salt in one tablespoon.

To cancel like terms and units, we can set up the calculation as follows:

(6.37 g) / (58.5 g/mol) = (0.109 moles)

In this calculation, the units of grams (g) cancel out, leaving us with the unit of moles (mol). Therefore, the correct terms and units canceled in this calculation are grams (g).

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Ideal gas law states

V is volume (L), P is pressure (atm), R is universal gas constant: 0.0821 L·atm/mol· K, n is number of moles, T is temperature in Kelvin

Here given:

\(\blacksquare\) mass of O₂ : 100 gram

\(\blacksquare\) moles: mass/molar mass = 100/32 = 3.125 moles

\(\blacksquare\)  25.0 °C = (25+273.15) = 298.15 K

\(\blacksquare\)  pressure: 1.25 atm

Volume:

\(\boxed{\sf V=\dfrac{nRT}{P}}\)

\(\Rightarrow \sf V=\dfrac{(3.125 \ x \ 0.0821 \ x \ 298.15 )}{1.25}\)

\(\Rightarrow \sf V=61.195 \ L\)

\(\Rightarrow \sf V=61.2 \ L \ \ \ (rounded \ to \ nearest \ tenth)\)

Additional Explanation:

In Liters: 61.2 Liters

In cubic meter: 0.061163 m³

In cubic centimeter: 61,163.5 cm³

Answer:

calcium cation

Formula and structure: The chemical formula of calcium chloride is CaCl2, and its molar mass is 110.983 g/mol. It is an ionic compound consisting of the calcium cation (Ca2+) and two chlorine anions (Cl-).

Explanation:

The velocity of electrons in the ground state of helium is approximately 1.09 * 10^6 m/s.

According to Bohr's atomic model, electrons in an atom revolve around the nucleus in a well-defined circular path known as an orbit or shell. Bohr's model of the atom explains the structure of hydrogen and helium, the first two elements of the periodic table.

In Bohr's model of the atom, electrons move in a circular orbit around the nucleus. The energy of each electron in an atom is quantized, meaning it is restricted to a particular energy level in the atom. The lowest energy level of an electron is known as its ground state, and it is the energy state in which the electron spends the majority of its time.

The velocity of electrons in the ground state of hydrogen can be determined using the following equation:

v = (Z * e^2) / (4 * π * ε₀ * n * h)

where Z is the atomic number, e is the elementary charge, ε₀ is the permittivity of free space, n is the principal quantum number, and h is Planck's constant.

Substituting the appropriate values, we get:

v(H) = (1 * (1.602 * 10^-19)^2) / (4 * π * 8.854 * 10^-12 * 1 * 6.626 * 10^-34)

v(H) = 2.19 * 10^6 m/s

Therefore, the velocity of electrons in the ground state of hydrogen is approximately 2.19 * 10^6 m/s.

Similarly, the velocity of electrons in the ground state of helium can be determined using the same equation. Since helium has an atomic number of 2, the equation becomes:

v(He) = (2 * (1.602 * 10^-19)^2) / (4 * π * 8.854 * 10^-12 * 1 * 6.626 * 10^-34)

v(He) = 1.09 * 10^6 m/s

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Answer:

well it might be 1.)Cadmium Fluoride CdF2 150.4078

2.)Cadmium(II) Perfluorate Cd(FO4) 2278.403

3.)Cadmium Ferrocyanide Cd2Fe(CN) 6436.7714

Explanation:

Answer:

13.5g

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 138.8g of aluminium is needed to react with 640g of iron oxide.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically, the balanced equation can be written as

3Fe\(_2\)O\(_3\) + 4Al \(\rightarrow\) Al\(_2\)O\(_3\) + 6Fe

number of moles of iron oxide= 640/159.6

                               =4.01

number of moles of aluminium =(4/3)×4.01

                                =5.34moles

mass of aluminium =5.34×26

                               =138.8g

Therefore, 138.8g of aluminium is needed to react with 640g of iron oxide.

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Answer:

Corrosion is a chemical process that converts metals into one of their oxides. Corrosion is chemical in nature and requires some factors in order to facilitate the oxidation reaction. Typically, acid rain is a good factor that can facilitate this process.

Of the three metals you mentioned here,

Mg would be the most affected by acid rain containing small amounts of  

H2SO4.

Answer:

The liquid will freeze

Explanation:

well see... all the other answers require INCREASING the temp, so yeah.

please brainliest me. i just gave away 1300 points in the last 24 hours for questions like "what is 1+1"

Answer:

Atomic number 29

Atomic mass 63.546 g.mol -1

Electronegativity according to Pauling 1.9

Density 8.9 g.cm-3 at 20°C

Melting point 1083 °C

Copper has a melting point of 1083.4 +/- 0.2°C, boiling point of 2567°C, specific gravity of 8.96 (20°C), with a valence of 1 or 2. Copper is reddish colored and takes a bright metallic luster. It is malleable, ductile, and a good conductor of electricity and heat.

The period during which potassium ions diffuse out of the neuron is known as repolarization.

For neurons to communicate with each other or send signals, two processes need to be completed:

Repolarization, which is the second process implies potassium ions diffusing out of the neurons. This is important because during depolarization the natural negative charge of the cell changes and through repolarization it can restore its natural state.

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Answer:

B

Explanation:

because sea water taste like Salt

According to the given picture:

A represents the atomic number.

B represents the chemical symbol.

C represents the atomic mass.

D represents the name of the element.

According to Aufbau Principle electrons are to be filled in a pattern that is, starting from lower-energy atomic orbitals electrons will be filling into the higher-energy orbitals.

So, electrons will be filled in the 4d orbital before 5d orbital.

Also the electron in 4d orbital will lie closer to the nucleus as compared to the electron in the 5d orbital.

as the principle quantum number for the electron in 4d orbital is 4, which means the electron is present in shell 4, i.e. n=4.

Whereas, the principle quantum number for the electron in 5d orbital is 5, which means the electron is present in shell 5, i.e. n=5.

If we see Neil Bohr's atomic model,

Electrons in 4th shell will be closer to the atomic nucleus than that of electron in 5th shell.

For clarification, you can see the figure.

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The first step in this calculation is to know how many liters is equal to 1 gallon, and the value is 3.785 liters, so now we have to make the following calculation:

1 gal = 3.785 Liters

30.0 gal = x Liters

x = 3.785 * 30.0

x = 114 Liters

The mass of the iceberg can be calculated using the density and the volume. To calculate the mass, multiply the density by the volume:

Since 1 kilogram (kg) = 1000 grams (g), the mass of the iceberg is 69.8 kg.

The density of ice is affected by temperature and pressure and thus, it can vary slightly. Additionally, the volume of an iceberg is not constant, as it can be affected by melting and erosion. Therefore, it is important to take into account these factors when calculating the mass of an iceberg.

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Answer:

O2

Explanation:

The compound that contains only nonpolar covalent bonds is the Oxygen molecule (O2). Thus, the correct option for this question is A.

A Covalent bond may be defined as a type of chemical bond that significantly involves the sharing of electrons to construct electron pairs between atoms. A covalent bond is always made when the distinction between the electronegativities of two atoms is too small for an electron transfer to take place to form ions.

A non-polar covalent bond is a kind of chemical bond that is formed when electrons are shared equally between two atoms of the same molecule. Here, O2 forms a double bond between each atom of oxygen.

While CO2, H2O, and NO3 form polar covalent bonds. This type of bond exists when atoms with distinctive electronegativities share electrons in a covalent bond.

Therefore, O2 is a compound that contains only nonpolar covalent bonds. Thus, the correct option for this question is A.

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Answer:

To make glue. aaaaaaaaa

Answer:

Cleaning

Explanation:

Hydrochloric acid is an ingredient in household cleaners because it helps clean tough stains.