Explain how Polonium decays. Don’t forget to include terms like isotope, mass, neutron, proton, helium, and half-life.

The major organic product of the given reaction is buten-2-one. Its structure is attached in image below. Therefore, option III is correct.

A chemical reaction is a hydration reaction. Water is one of the reactants converted into products. The hydration of alkenes to produce alcohols is one of the most common hydration reactions. The hydration of ethene, for example, produces industrial ethanol.

Hydration of alkynes by H₂SO₄ and HgSO₄ considers the addition reaction following Markovnikov's rule. Addition here is two times and the water get take away from the carbon resulting formation of buten-2-one as product.

Thus, option III is correct.

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La idea principal de este texto es descifrar los mecanismos por los cuales la marihuana puede causar al excitacion de las neuronas y de este modo llevar a cambios en el cerebro. La idea secundaria es comprender el rol de la dopamina como neurotrasmisor. La opinion del autor es que el consumo prolongado de canabis podria estar asociado a daño irreversible.

Las celulas nerviosas (es decir, neuronas) reaccionan de acuerdo a la presencia de neurotrasmisores en el medio extracelular, este es uno de los mecanismos que usa el sistema nervioso para responder a estimulos ambientales.

La marihuana o cannabis posee substancias psicoactivas que se asocian a receptores presentes en las membranas neuronales de modo similar a neurotrasmisores naturales tales como la dopamina.

En conclusión, este estudio trata sobre los efectos de la marihuana como sustancia psicoactiva en el cerebro y del mecanismo de accion de los neurotrasmisores, lo cual se puede asociar a los efectos de esta droga en celulas neuronales.

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Answer:

How do amoeba respire.

Define Diffusion.

The number of moles of the gas can be determined using ideal gas equation. The number of moles of Br gas in 2.8 L at 1.38 atm and 327 K is 0.144 moles.

Ideal gas law states the relation between temperature, pressure and volume with the number of moles of a gas as written below:

PV = nRT

where, R is the universal gas constant equal to 0.082 L atm/K mol

Given that, T = 327 K

P = 1.38 atm

V = 2.8 L.

Then, n = PV/RT

Number of moles of Br gas, n = (1.38 atm ×2.8 L)/(327 K × 0.082 L atm/K mol ) = 0.144 moles.

Therefore, the number of moles of Br gas in in 2.8 L at 1.38 atm and 327 K is 0.144 moles.

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wish in new Explanation:

Answer:

It is A.

Explanation:

found at ground

hope this helps

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

Answer:

A. Carbon dioxide, oxygen

Explanation:

Like plants, trees go through photosynthesis to produce their energy. They consume water and sunlight as well as carbon dioxide to produce oxygen and glucose.

Answer:

\(\boxed {\boxed {\sf 0.566 \ mol \ Fe}}\)

Explanation:

We are asked to convert a number of atoms to moles.  

We can convert atoms to moles using Avogadro's Number, which is 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this problem, the particles are atoms of iron (Fe). There are 6.022 ×10²³ atoms of iron in 1 mole of iron.  

We use dimensional analysis to convert atoms to moles. This involves setting up ratios. Use Avogadro's Number and the underlined information to make a ratio.

\(\frac {6.022 \times 10^{23}\ atoms \ Fe}{1 \ mol \ Fe}\)

We are converting 3.41 × 10²³ atoms of iron to moles, so we multiply by this value.

\(3.41 \times 10^{23} \ atoms \ Fe *\frac {6.022 \times 10^{23}\ atoms \ Fe}{1 \ mol \ Fe}\)

Flip the ratio. It stays equivalent, but it allows the units of atoms of iron to cancel.

\(3.41 \times 10^{23} \ atoms \ Fe *\frac{1 \ mol \ Fe} {6.022 \times 10^{23}\ atoms \ Fe}\)

\(3.41 \times 10^{23}*\frac{1 \ mol \ Fe} {6.022 \times 10^{23}}\)

\(\frac{3.41 \times 10^{23}} {6.022 \times 10^{23}} \ mol \ Fe\)

\(0.5662570575\ mol \ Fe\)

The original measure ment of iron atoms ( 3.41 × 10²³ ) has 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandths place. The 2 in the ten-thousandths place ( 0.5662570575) tells us to leave the 6 in the thousandths place.

\(0.566 \ mol \ Fe\)

3.41 × 10²³ atoms of iron is equal to approximately 0.566 moles of iron.

Answer:

31,380 Joules

Explanation:

Given Data:

Mass = m = 100 g

Temperature 1 = = 25 °C

Temperature 2 = = 100 °C

Specific Heat Constant = c = 4.184

Change in Temp. = ΔT = 100 - 25 = 75 °C

Required:

Heat = Q = ?

Formula:

Q = mcΔT

Solution:

Q = (100)(4.184)(75)

Q = 31, 380 Joules

Hope this helped!

~AH1807

Answer:

\(\Large \boxed{\sf 31400\ J}\)

Explanation:

Use formula

\(\displaystyle \sf Heat \ (J)=mass \ (g) \times specific \ heat \ capacity \ (Jg^{-1}\°C^{-1}) \times change \ in \ temperature \ (\°C)\)

Specific heat capacity of water is 4.18 J/(g °C)

Substitute the values in formula and evaluate

\(\displaystyle \sf Heat \ (J)=100.0 \ g \times 4.18 \ Jg^{-1}\°C^{-1} \times (100\°C-25\°C)\)

\(\displaystyle Q=100.0 \times 4.18 \times (100-25 )=31350\)

Answer:

B.0.558M

Explanation:

M=n/L

n=m/Mm

Mm=NaOH

=23+16+1

=40g/mol

n=m/Mm

= 38/40

=0.95

M=n/L

=0.95/1.70

=0.558

The strongest intermolecular force between Xe and NH3 is dipole-induced dipole interaction.

NH3 is a polar substance. The molecule has a dipole moment therefore there exists dipole - dipole interaction within the molecule.

In addition to that, nitrogen is bonded to hydrogen which leads to extensive hydrogen bonding in NH3.

On the other hand, Xe is a noble gas and the strongest interaction between Xe particles are dispersion forces.

However, when Xe is combined with NH3, the two interact via  dipole-induced dipole interactions.

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Explanation:

endothermic because absorbing

energy

H2O is absorbing heat to release hydrogen and oxygen gas. any reaction that requires energy from outside is endothermic.

Answer:

CH3CH2OH

Explanation:

The reactant has:

- 6 carbon atoms

- 12 hydrogen atoms

- 6 oxygen atoms

The second product has:

- 4 oxygen atoms

- 2 carbon atoms

In 2CH3CH2OH there are:

- 4 carbon atoms

- 12 hydrogen atoms

- 2 oxygen atoms

If you combine the number of atoms of each chemical species of both 2CH3CH2OH and the second product, you will see that you get the same number of atoms of each chemical species in the reactant:

carbon = 2 + 4 = 6 (number of carbon atoms in reactant)

oxygen = 4 + 2 = 6 (number of oxygen atoms in reactant)

hydrogen = 0 + 12 = 12 (number of hydrogen atoms in reactant)

This means that no atoms were created or destroyed which is true for all equations. If this was done with one of the other compounds listed, atoms would have been created or destroyed which cannot happen. In all equations, atoms are never created or destroyed, however they do rearrange to form new products.

Answer:

A

Explanation:

Answer:

565 kJ

Explanation:

\(H_v\) = Heat of vaporization of water at 100°C = 2260 J/g

m = Mass of water = 250 g

Heat required is given by

\(Q=mH_v\)

\(\Rightarrow Q=250\times 2260\)

\(\Rightarrow Q=565000\ \text{J}\)

\(\Rightarrow Q=565\times 10^3\ \text{J}\)

\(\Rightarrow Q=565\ \text{kJ}\)

The heat required to vaporize the water is 565 kJ.

Answer:

English Language Learners Definition of number. (Entry 1 of 2) : a word or symbol (such as "five" or "16") that represents a specific amount or quantity. : a number or a set of numbers and other symbols that is used to identify a person or thing.

Explanation:

79 is the number of protons gold has.

Hope this helps; have a great day!

Answer:

I think it's the second one.

Answer:

a = 2m/s²

Explanation:

Given data:

Mass of sofa = 150 Kg

Force applied = 300 N

Acceleration = ?

Solution:

Formula:

F = ma

F = force

m = mass

a = acceleration

by putting values,

300 N = 150 Kg × a

a =  300 N /150 Kg

a = 300 Kg m/s² / 150 Kg   ( N = Kgm/s²)

a = 2m/s²

Answer:

The question wants you to determine the energy that the incoming photon must have in order to allow the electron that absorbs it to jump from

n

i

=

2

to

n

f

=

6

.

A good starting point here will be to calculate the energy of the photon emitted when the electron falls from

n

i

=

6

to

n

f

=

2

by using the Rydberg equation.

1

λ

=

R

⋅

(

1

n

2

f

−

1

n

2

i

)

Here

λ

si the wavelength of the emittted photon

R

is the Rydberg constant, equal to

1.097

⋅

10

7

m

−

1

Plug in your values to find

1

λ

=

1.097

⋅

10

7

.

m

−

1

⋅

(

1

2

2

−

1

6

2

)

1

λ

=

2.4378

⋅

10

6

.

m

−

1

This means that you have

λ

=

4.10

⋅

10

−

7

.

m

So, you know that when an electron falls from

n

i

=

6

to

n

f

=

2

, a photon of wavelength

410 nm

is emitted. This implies that in order for the electron to jump from

n

i

=

2

to

n

f

=

6

, it must absorb a photon of the same wavelength.

Answer:

1.Reactivity

2.combustibility

3.Shape

Hope this helps,

If you think I am right please give brainliest

Happy Holidays!

Explanation:

Answer: The answer is 9.8 m/s^2 south

Explanation:

We must melt about 3.8 kg of brass A, 4.1 kg of brass B, and 6.5 kg of brass C to obtain about 14.5 kg of the desired alloy

we can set up a system of equations based on the conservation of mass and the desired composition:

0.533x + 0.247y + 0.220z = 14.5 (desired composition of copper, zinc, and nickel)

The given information includes:

Brass A: 41% copper, 23% zinc, 36% nickel

Brass B: 54% copper, 23% zinc, 23% nickel

Brass C: 56% copper, 26% zinc, 18% nickel

Using this information, we can write the following equations:

0.41x + 0.54y + 0.56z = 0.533(x + y + z) (copper)

0.23x + 0.23y + 0.26z = 0.247(x + y + z) (zinc)

0.36x + 0.23y + 0.18z = 0.220(x + y + z) (nickel)

Simplifying each equation, we get:

0.067x - 0.027y - 0.023z = 0 (copper)

-0.017x + 0.017y + 0.003z = 0 (zinc)

-0.020x - 0.027y + 0.038z = 0 (nickel)

We can solve the equations using substitution method or elimination method and our values will be:

x = 3.8462

y = 4.1077

z = 6.5461

In conclusion, we need to melt about 3.8 kg of brass A, 4.1 kg of brass B, and 6.5 kg of brass C to obtain about 14.5 kg of the desired alloy.

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Answer:

0.620M

Explanation:

molarity= moles of solute/volume of solution

molar mass of mgs= 24.3+32= 56.3

moles= 33.9/56.3=0.601

molarity= 0.601/0.969=0.602M

Answer:

I don know

Explanation:

The pH of the buffer solution would be 7.11.

Phosphoric acid, H3PO4, can donate three protons (H+) in a stepwise manner to form dihydrogen phosphate (H2PO4-) and mono hydrogen phosphate (HPO4^2-) ions. The chemical equation for the reaction is as follows:

H3PO4 + H2O ⇌ H2PO4^- + H3O^+

H2PO4^- + H2O ⇌ HPO4^2- + H3O^+

HPO4^2- + H2O ⇌ PO4^3- + H3O^+

The pKa values for these reactions are 2.15, 7.20, and 12.35, respectively.

To prepare a buffer solution, we need to mix a weak acid and its conjugate base or a weak base and its conjugate acid. In this case, we have a mixture of H3PO4 and KH2PO4, which is a weak acid and its conjugate base, respectively.

The Henderson-Hasselbalch equation for a buffer solution is:

pH = pKa + log([base]/[acid])

where [base] and [acid] are the molar concentrations of the conjugate base and weak acid, respectively.

Using the given values:

[acid] = 0.155 mol / 0.500 L = 0.310 M (molarity of H3PO4)

[base] = 0.250 mol / 0.500 L = 0.500 M (molarity of KH2PO4)

We can calculate the pKa value for the first dissociation of H3PO4 using the given Ka value:

Ka = 10^(-pKa) = 7.52 x 10^(-3)

pKa = -log(Ka) = 2.12

Now, substitute the values into the Henderson-Hasselbalch equation:

pH = 2.12 + log(0.500/0.310)

pH = 7.11

Therefore, the pH of the buffer solution is approximately 7.11.

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To determine the row in which the student should enter "No" in the column for Law, we need to have a clear understanding of the table and the data in it.The question might be related to a specific table or data set. However, without that, it's not possible to come up with a definite answer. Here are some possible ways to approach the problem:

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