elect all statements that complete the following sentence. SN2 reactions _____. Multiple select question. proceed by a two-step mechanism are bimolecular reactions involve the formation of carbocations follow second-order kinetics

Answer:

heat

Explanation:

Among the given options, the best metal to use as a sacrificial anode for inhibiting the corrosion of iron by cathodic protection is magnesium (Mg).

The best metal to use as a sacrificial anode for cathodic protection to inhibit the corrosion of iron is magnesium (Mg).

In cathodic protection, a more reactive metal is used as a sacrificial anode to protect a less reactive metal from corrosion. The sacrificial anode undergoes corrosion instead of the protected metal, thereby providing protection.

Magnesium is more reactive than iron, copper, silver, and gold, which makes it an effective sacrificial anode. When connected to iron, magnesium will corrode preferentially, sacrificing itself to protect the iron from corrosion.

To learn more about magnesium

https://brainly.com/question/30333465

#SPJ11

Answer:

There is too much here for me to attempt in one sitting, but I will get you started and give suggestions that may help you proceed on your own.

a)  As far as I can tell, you didn't provide the reduction potentials in the table below.  So, I looked them up and find them to be

Cu2+ +2e- ==> Cu(s)  Eº = +0.34 V

Zn2+ + 2e- ==> Zn(s)  Eº = -0.76 V

Net ionic equation:  Cu2+(aq) + Zn(s) ==> Cu(s) + Zn2+(aq)

b)  Eºcell = 0.34 V + 0.76 V = 1.10 V

c)  ∆Gº = -nFEº  where n = number of electrons transferred (2) and F = 96,485 C/mol e- and Eº = 1.1 V

d)  Again, there is no diagram

e)  same

f)  Use the Nernst equation  Ecell = Eºcell - 2.303RT/nF log Q  where R = 8.314; T = Kelvin; F = Faraday const. and Q = reaction quotient, i.e. products/reactants

g)  the cell voltage is an intensive property.  That should help you answer this part of the question

Explanation:

its not much but i hoped this helped

No, but Group 1 elements can. Group 1 elements (alkali metals such as Li, Na, K...) all have one valence electron that they donate when forming ionic bonds. This will cause them to have a charge of +1.

Answer:

Explanation:

there must be equal number of carbons, hydrogen and oxygen between products and reactants

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

What is pressure?

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Various units are used to express pressure. Some of these are units of force divided by units of area. For example, the SI unit of pressure, Pascal (Pa), is 1 Newton per square meter (N/m2). Similarly, pounds force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in imperial and US systems. Pressure can also be expressed as standard atmospheric pressure. Atmospheric pressure (atm) is equal to this pressure and torr is defined as 1/760 of this. Manometric units such as centimeters of water, millimeters of mercury, and inches of mercury are used to express pressure as the height of a particular liquid column within a manometer.

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

To know more about Pressure, visit:

https://brainly.com/question/28012687

#SPJ4

Answer:

Neutral. There are equal amounts of protons or positively charged parts and electrons or negatively charged parts. The neutrons have no net charge which means this atom of chlorine is neutral.

Explanation:

The vibrational frequency of HD is about 10 times lower than that of HI, since the reduced mass of HD is about twice that of HI.

(i) To calculate the moment of inertia of the molecule, we can use the formula:

I = µr²

where µ is the reduced mass of the system, which is given by:

µ = (m1m2)/(m1 + m2)

Here, m1 is the mass of the H atom and m2 is the mass of the I atom. Since the H atom is much lighter than the I atom, we can approximate the reduced mass as:

µ ≈ mH

where mH is the mass of the H atom. The distance of the H atom from the I atom is given as 161 pm = 161 × 10⁻¹² m, so the moment of inertia is:

I = mHr² = (1.0079 u)(161 × 10⁻¹² m)² = 2.754 × 10⁻⁴ kg m²

(ii) The greatest wavelength of the radiation that can excite the molecule into rotation is given by the formula:

λ = 2πc/I

where c is the speed of light. Substituting the values, we get:

λ = 2π(3.00 × 10⁸ m/s)/(2.754 × 10⁻⁴ kg m²) = 2.27 mm

(b) (i) The vibrational frequency of the molecule is given by the formula:

ν = (1/2π)√(k/µ)

where k is the force constant of the HI bond. Substituting the values, we get:

ν = (1/2π)√(314 N m⁻¹/1.0079 u) = 1.19 × 10¹³ Hz

(ii) The wavelength required to excite the molecule into vibration is given by the formula:

λ = c/ν

Substituting the values, we get:

λ = (3.00 × 10⁸ m/s)/(1.19 × 10¹³ Hz) = 0.252 µm

(c) The vibrational frequency of HI when H is replaced by deuterium (D) is given by the formula:

νD = (1/2π)√(k/µD)

where µD is the reduced mass of the HD molecule, which is given by:

µD = (mHmD)/(mH + mD) ≈ 0.5mH

Substituting the values, we get:

νD = (1/2π)√(314 N m⁻¹/(0.5 × 1.0079 u)) = 9.49 × 10¹² Hz

To know more about vibrational frequency,

https://brainly.com/question/141640

#SPJ11

Answer:

1) Plants that fix nitrogen, such as peas and other legumes, improve soil quality for future vegetables planted in the same bed. (2) Alternating shallow-rooted and deep-rooted plants in a given area draws nutrients from the soil at varying depths.

In the asthenosphere, density and temperature are the primary contributors to convection currents.

What exactly is the Earth's asthenosphere?

The weaker, denser layer below the lithospheric mantle is known as the asthenosphere. It is between 62 miles and 410 kilometers (100 miles) below the surface of the Earth. Because of the asthenosphere's extreme heat and pressure, rocks begin to weaken and partially melt, turning semi-molten.

What is the short definition of the asthenosphere?

Located under the lithosphere, the asthenosphere is a region of the Earth's mantle that is thought to be significantly hotter and more fluid than the lithosphere. Between 100 km (60 miles) and 700 km (450 miles) below the surface of the Earth is the asthenosphere.

To know more about asthenosphere visit:

https://brainly.com/question/7152935

#SPJ1

One of the main disadvantages of conducting laboratory experiments is the issue of low external validity. This means that the results obtained in the controlled laboratory setting may not necessarily generalize to real-world situations.

For example, the behavior of participants in a lab may differ from their behavior in natural settings due to factors such as demand characteristics or artificiality of the experimental environment. While laboratory experiments are advantageous in terms of high internal validity, meaning that the researcher has a high level of control over the variables being studied, this often comes at the cost of low external validity, which can limit the generalizability of the findings to real-world situations.
The disadvantage of conducting laboratory experiments among the options provided is b) Low external validity. Laboratory experiments offer high internal validity due to controlled conditions, but low external validity can be a drawback since the artificial setting may not accurately reflect real-world situations, potentially limiting the applicability of the findings to broader contexts.

To learn more about laboratory visit;

https://brainly.com/question/30753305

#SPJ11

A longer stamen could ensure that an insect brushes against an anther and picks up pollen is the advantage of having a longer stamen. The correct option is A

Stamen long is the male reproductive part of a flower. In all but a few extant angiosperms the stamen consists of a long slender stalk the filament with a two lobed anther at the tip. The anther consists of four saclike structures microsporangia that produce pollen for pollination.

Therefore stamens consist of an anther the site of pollen development and in most species a stalk-like filament which transmits water and nutrients to the anther and positions it to aid pollen dispersal.

Learn more about stamen long here: brainly.com/question/1129315

#SPJ1

Answer:

2 atoms

Explanation:

Control Experiment: Those experiment where a control is taken as a reference to notice the changes in same reaction in the presence of external stress.

Need for a control in a experiment: The control is required to analyse the effect of stress applied to reaction. For e.g. If there are two compounds AB and XY & they are undergoing displacement reaction to form AX & BY, But all sudden another salt let MN is added into the reaction then there are possibilities of formation of different products depending upon the reactivity of initial reactants and external compound. The product can be same as our Control i.e. AB & XY if MN remains inert in the reaction. That's why control is important to compare the results.

\(\sf \small \pink{Thanks }\: \green{for} \: \blue{joining} \: \orange{brainly } \: \red{community}!\)

Answer:

Gravitational potential energy is a direct function of weight and height. Higher the object, high is the gravitational potential energy.

Therefore the skydiver inside of the plane has high gravitational potential energy than the same diver after she has jumped because height is now decreased as he is going down.

Answer:

It takes approximately 28 days for the Moon to revolve around Earth. Revolution is the elliptical motion of a body traveling around another body

Explanation:

The quantity of heat gained to raise the temperature from 25.0°C to 50.0°C is 10,450 Joules.

Given the following data:

To find the quantity of heat gained:

Mathematically, heat capacity or quantity of heat is given by the formula;

\(Q = mc\theta\)

Where:

Substituting the values into the formula, we have:

\(Q = 100(4.18)(50 - 25)\\\\Q = 418(25)\)

Quantity of heat = 10,450 Joules.

Read more: https://brainly.com/question/188778

Answer:

pH = 2.21

Explanation:

Hello there!

In this case, according to the reaction between NaF and HCl as the latter is added to the buffer:

\(NaF+HCl\rightarrow NaCl+HF\)

It is possible for us to see how more HF is formed as HCl is added and therefore, the capacity of this HF/NaF-buffer is diminished as it turns acid. Therefore, it turns out feasible for us to calculate the consumed moles of NaF and the produced moles of HF due to the change in moles induced by HCl:

\(n_{HF}^{new}=0.300mol+0.150mol=0.450mol\\\\n_{NaF}^{new}=0.200mol-0.150mol=0.050mol\)

Next, we calculate the resulting concentrations to further apply the Henderson-Hasselbach equation:

\([HF]=\frac{0.450mol}{1.0L} =0.450M\)

\([NaF]=\frac{0.050mol}{1.0L} =0.050M\)

Now, calculated the pKa of HF:

\(pKa=-log(6.8x10^{-4})=3.17\)

We can proceed to the HH equation:

\(pH=pKa+log(\frac{[NaF]}{[HF]} )\\\\pH=3.17+log(\frac{0.05M}{0.45M} )\\\\pH=2.21\)

Best regards!

pH is the measure of the hydrogen or hydronium ion concentration in an aqueous solution. The pH of the buffer made with HF and NaF is 2.21.

pH is the measure of the acidic or the basic content in a solution that can be given by the hydrogen or the hydroxide concentration.

The reaction can be shown as,

\(\rm NaF + HCl \rightarrow NaCl + HF\)

New moles of HF is 0.300 + 0.150 = 0.450 moles and new moles of NaF is 0.200 - 0.150 = 0.050 moles.

The concentration is calculated by the Henderson-Hasselbach equation:

\(\rm [HF] = \dfrac{0.450 \;\rm mol}{1.0 \;\rm L} = 0.450 \;\rm M\)

And,

\(\rm [NaF] = \dfrac{0.050\;\rm mol}{1.0 \;\rm L} = 0.050\;\rm M\)

pKa of hydrogen fluoride is calculated as:

\(\rm pKa = - log (6.8 \times 10^{-4}) = 3.17\)

The pH from the pKa can be calculated as:

\(\begin{aligned}\rm pH &=\rm pKa + log (\dfrac{[NaF]}{[HF]})\\\\&= 3.17 + \rm log (\dfrac{0.05}{0.45})\\\\&= 2.21\end{aligned}\)

Therefore, the pH is 2.21.

Learn more about pH here:

https://brainly.com/question/16405188

Answer:

P1*V1/T1=P2*V2/T2

I think this will help you

The tiny unit of an element that retains the properties of the element is called an atom.

Atoms are the basic building blocks of matter and are composed of a nucleus, which contains positively charged protons and neutral neutrons, surrounded by negatively charged electrons that orbit the nucleus. The unique arrangement of protons, neutrons, and electrons in an atom determines its chemical and physical properties, such as its atomic number, mass, and reactivity.Atoms are incredibly small and are typically measured in units of picometers or angstroms.

Each element is defined by the number of protons in its atomic nucleus, which is known as its atomic number. For example, carbon atoms have six protons in their nucleus, while oxygen atoms have eight protons. The number of neutrons in an atom's nucleus can vary, resulting in isotopes of the same element with different atomic masses.

Atoms can combine with other atoms to form molecules and compounds through chemical bonds, including covalent bonds, ionic bonds, and metallic bonds.

Learn more about atoms here:

https://brainly.com/question/13654549

#SPJ4

i) 2KClO3 → 2KCL + 3O2

ii) HNO3 + NaHCO3 → H20 + CO2

iii) 2Na + 2H2O → 2NaOH + H2

Answer:

0.45

Explanation:

Answer:

B. Biosphere.

Explanation:

Answer:

cierra los ojos que me vengo o me vengo

cierra los ojos que me vengo o me vengo

Explanation:

cierra los ojos que me vengo o me vengo cierra los ojos que me vengo o me vengo cierra los ojos que me vengo o me vengo cierra los ojos que me vengo o me vengo cierra los ojos que me vengo o me vengo cierra los ojos que me vengo o me vengo

Given that the volume and molarity of barium acetate are 38.2 ml and 5.0 M, respectively. We need to find the theoretical mass in grams of the precipitate. Let's first write the balanced chemical equation for the reaction taking place: Rubidium Carbonate + Barium Acetate → Barium Carbonate + Rubidium AcetateRb2CO3(aq) + Ba(C2H3O2)2(aq) → BaCO3(s) + 2 RbC2H3O2(aq).

We can see that 1 mole of barium acetate reacts with 1 mole of barium carbonate. Hence, the molar ratio of barium acetate and barium carbonate is 1:1.Using the molarity and volume of barium acetate, we can find the moles of barium acetate as: Moles of barium acetate = Molarity × Volume in litres= 5.0 mol/L × (38.2/1000) L= 0.191 moles. Now, from the balanced chemical equation, we can see that 1 mole of barium carbonate is formed from 1 mole of barium acetate.

Therefore, the number of moles of barium carbonate formed will also be 0.191 moles. Now, let's calculate the mass of barium carbonate using its molar mass. Molar mass of BaCO3= (1 × atomic mass of Ba) + (1 × atomic mass of C) + (3 × atomic mass of O)= (1 × 137.33 g/mol) + (1 × 12.01 g/mol) + (3 × 16.00 g/mol)= 197.33 g/mol. Theoretical mass of BaCO3= Number of moles of BaCO3 × Molar mass of BaCO3= 0.191 mol × 197.33 g/mol= 37.7 g. Therefore, the theoretical mass of the precipitate is 37.7 g (approx) when only the volume and molarity of the barium acetate are taken into account. Note: In order to find the limiting reagent and the actual mass of the precipitate formed, we need to consider the volume and molarity of both the reactants.

To know more about theoretical mass visit

https://brainly.com/question/14527467

#SPJ11

Answer:

13598 J

Explanation:

Q = m × c × ∆T

Where;

Q = amount of energy (J)

m = mass (grams)

c = specific heat capacity

∆T = change in temperature

m = 65g, specific heat capacity of water = 4.184J/g°C, initial temperature= 100°C, final temperature = 150°C

Q = 65 × 4.184 × (150 - 100)

Q = 271.96 × 50

Q = 13598 J

Hence, 13598 J of energy is required to boil 65 grams of 100°C water and then heat the steam to 150°C.

Answer:

0.7atm

Explanation:

3.5/5 because constant temperature

Answer:

Heterogeneous mixture

Explanation:

A heterogeneous mixture is a mixture of two or more chemical substances (elements or compounds), where the different components can be visually distinguished and easily separated by physical means. Examples include: mixtures of sand and water. mixtures of sand and iron filings.