Draw the principal organic product expected when 2-methylthiophene reacts with hno3. show minimized formal charges, if applicable.

Answer:

[tex]p[H+] = 10.042[/tex]

Explanation:

As we know that

[tex]pKw = pH + pOH[/tex]......eq (1)

we will calculate the pH of OH- and then we will calculate the pH of H+

So p[OH-] [tex]= - log [1.10 * 10^{-4}][/tex]

Solving the right side of the equation, we get

p[OH-]

[tex]= - [-3.958]\\= 3.958[/tex]

Now we know that

[tex]pKw = 14.0[/tex]

Substituting the value of pOH in the above equation, we get -

[tex]14.0 = p[H+] + 3.958\\p[H+] = 14 - 3.958\\p[H+] = 10.042[/tex]

Answer:

The black atoms

Explanation:

Answer:

Answer Choice D

Explanation:

Study Island Question

Answer:

Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate. Whether or not such a reaction occurs can be determined by using the solubility rules for common ionic solids.

Explanation:

Explanation:

High emission of CO2 which is bad and the wild animals which live in that spot will flee, thus that place will eventually lose much more ecological diversity.

Answer:

Pressure

Explanation:

Basically, Pressure equals Force, divided by the area.

The measure of how much force is acting on a given area is known as pressure. It measures how concentrated a force is. The size of the force is represented by a simple relationship: Force = Pressure × Area.

The term pressure is defined as the amount of force applied perpendicular to the surface of an object per unit area. It is represented by symbol "p" or P.

Pressure is Force per Unit Area. Pressure also defined as the force on an object that is spread over a surface area. The equation for pressure is the ratio of force and the area where the force is applied.

Force is measured in units of Newtons (N), named after the famous scientist Isaac Newton.

Thus, The size of the force is represented by a simple relationship: force = pressure × area.

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Answer:

Option C, developmental view point

Explanation:

A person with preservationist viewpoint will think of only preserving the natural resources and the environment. While a person with a conservationist viewpoint will think of conserving the landscape, architecture, heritage, culture, buildings, rituals, etc.  

However, a person with developmental viewpoint will think of developing resources at ease. He/She will prioritize development and comfort of customer above all.  

Hence, option C is correct

Answer:

A fatty acid is made of a polar carboxylic acid functional group and a nonpolar hydrocarbon tail.

Explanation:

A fatty acid is made of fat-soluble components, that consists of a large (more than 4 carbon atoms) aliphatic chain of carbon atoms, with hydrogen atoms and a carboxyl group (-COOH). The named fatty acid is because of the -COOH group.

The chain can be made of carbon atoms with a single bond, (saturated) or with double or triple bonds (unsaturated). When the fatty acid has just one double bond the fatty acid is monounsaturated, and otherwise, if it has multiple double bonds it is polyunsaturated. Fatty acid chains can be different in their lengths and their degree of unsaturation.          

Mostly of the tail of the fatty acid is nonpolar and hence, hydrophobic, because the long-chain made of hydrocarbon atoms.

From all of the above, the correct answer is option b: A fatty acid is made of a polar carboxylic acid functional group and a nonpolar hydrocarbon tail.

I hope it helps you!

Answer: alr, gimme a sec

Answer:

Okay I will go look at it

25.4 g of salt was dissolved in distilled water to make 425 mL of solution. 5.94 percent m/v concentration.

The term concentration is defined as a substance is the quantity of solute present in a given quantity of solution. Concentrations are mostly expressed in terms of molarity which is defined as the number of moles of solute in one litre of solution.

Concentration is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.

Concentration = mass / volume

Mass =  25.4 g

Volume = 425ml

Concentration = 25.4 g / 425ml x 100

=5.94 percent

Thus, 25.4 g of salt was dissolved in distilled water to make 425 mL of solution. 5.94 percent m/v concentration.

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Answer:b

Explanation:

Answer:

1 x 10^-7 or 7

Explanation:

pH=-log(H+)

pH+pOH=14

Answer:

O, S, Se, Te, Po

Explanation:

Oxygen, sulphur, selenium, tellurium and polonium are all members of group sixteen. The elements in group sixteen all possess six electrons in their outermost shell. Recall that an atom is said to stable if it contains eight electrons in its outermost shell. This is also referred to as the octet rule. Hence atoms of elements obey the octet rule when they combine to form compounds with eight electrons present on the outermost shell of each atom.

Having six electrons on their outermost shell implies that they need to gain two electrons by bonding to other atoms of other elements. Two examples will suffice here.

Water is formed when an oxygen atom shares an electron with each hydrogen atoms.

Hydrogen sulphide is formed when sulphur share two electrons with two hydrogen atoms. Hence the answer.

Answer:

O, S, Se, Te, Po

Explanation:

Hello,

In this case, when chemical bonds are formed, the valence electrons are the bridge to make it possible, nevertheless, the octet is the limit for the formation of bonds, that is, an element must not exceed 8 shared or gained electrons. In such a way, elements able to gain to electrons to attain the octet are those from the VIA group: O, S, Se, Te, Po, as they have six valence electrons, so two more electrons are suitable for attaining the octet.

Best regards.

Answer:

Si se usan 50 gramos de calcio y óxigeno, se obtienen 70 gramos de óxido de calcio.

Explanation:

Hola,

En este caso, la reacción llevada a cabo es:

[tex]2Ca+O_2\rightarrow 2CaO[/tex]

De este modo si asumimos el ejemplo dado, 50 gramos de calcio, cuya masa atómica es 40 g/mol y 50 g de oxígeno, cuya masa atómica como gas diatómico es 32 g/mol, antes de calcular los gramos de óxido de calcio producidos, debemos identificar el reactivo límite. Así, calculamos las moles de calcio disponibles en 50 g:

[tex]mol_{Ca}^{disponible}=50gCa*\frac{1molCa}{40gCa} =1.25molCa[/tex]

Y también las moles de calcio consumidas por los 50 g de oxígeno, utilizando su relación molar 2:1:

[tex]mol_{Ca}^{consumidas\ por\ O_2}=50gO_2*\frac{1molO_2}{32gO_2} *\frac{2molCa}{1molO_2} =3.125molCa[/tex]

Por lo tanto, hay menos calcio disponible que el que consume el oxígeno, por lo que el calcio esel reactivo límite. Ahora, con este, calculamos los gramos de óxido de calcio, cuya masa molar es 56 g/mol, que se producen:

[tex]m_{CaO}=1.25molCa*\frac{2molCaO}{2molCa}* \frac{56gCaO}{1molCaO}\\ \\m_{CaO}=70gCaO[/tex]

Esto quiere decir que de 50 gramos de oxígeno, solo 20 gramos reaccionan para formar 70 gramos de óxido de calcio.

Saludos!

Answer:

69.9 g of CaO will be produced. ≅ 70 g

Explanation:

First of all you need to make the reaction:

2Ca + O₂ → 2 CaO

Determine the moles of each reactant:

10 g Ca / 40.08 g/mol = 0.25 moles

4 g O₂ / 32 g/mol = 0.125 moles

There is no limiting reagent in this reaction, we can use both elements.

Ratio between Ca and CaO, is 2:2. For 0.25 moles of Ca I would make 0.25 moles of CaO. We convert the moles to mass:

0.25 mol . 56.08 g / 1mol = 14 g

Let's think when you have the same mass of reactant:

50 g Ca/ 40.08 g/mol = 1.24 moles

50 g O₂ / 32 g/mol = 1.56 moles

For 1 mol of oxygen I need 2 moles of calcium, so If I have 1.56 moles, I would need the double, 3.12. Notice that Ca is the limiting reagent (we need 3.12 moles of reactant, but we only have 1.24). Now we need to work with it. If 2 moles of Ca, makes 2 moles of CaO, then 1.24 moles, will produce the same amount of oxide. We finally convert the moles to mass: 1.24 mol . 56.08 g/mol = 69.9 g

Answer:113

Explanation:let me know if it is right

According to stoichiometry and reaction which produces manganese(III) oxide  134.24 g would be produced from the complete chemical reaction of 46.8 g of manganese.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

According to the chemical reaction,of oxidation of manganese and as per stoichiometry,54.93 g manganese produces 157.87 g manganese(III) oxide so ,46.8 g of manganese will produce 46.8×157.87/54.93=134.24 g.

Thus, 134.24 g  of manganese(III) oxide would be produced from the complete reaction of 46.8 g of manganese.

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Answer:Acids taste sour, react with metals, react with carbonates, and turn blue litmus paper red. Bases taste bitter, feel slippery, do not react with carbonates and turn red litmus paper blue.

Explanation:

Answer:

pOH = 8

Explanation:

There are many formulaes to go from pH to pOH. One of my favorites is this one:

pH+pOH=14  (Now this just becomes an algebra problem because you already know pH value)

6 + pOH = 14 (subtract 6 from both sides)

pOH= 8

Answer:

Most nuclear fuels contain heavy fissile actinide elements that are capable of undergoing and sustaining nuclear fission. The three most relevant fissile isotopes are uranium-233, uranium-235 and plutonium-239

Explanation:

Answer: 160 torr

Explanation:

To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.

The equation given by this law is:

[tex]P_1V_1=P_2V_2[/tex]

where,

[tex]P_1\text{ and }V_1[/tex] are initial pressure and volume.

[tex]P_2\text{ and }V_2[/tex] are final pressure and volume.

We are given:

[tex]P_1=400 torr\\V_1=200mL\\P_2=?\\V_2=500mL[/tex]

Putting values in above equation, we get:

[tex]400torr\times 200ml=P_2\times 500mL\\\\P_2=160torr[/tex]

Thus the pressure has changed to 160 torr

Answer:

Pretty sure its salt water, my apologies if its wrong

Explanation:

Answer:

Sugar water :) took the test lol

Explanation:

Answer:

D. 2.5 dm3

Explanation:

Alright, first off, you gotta find how many moles Sodium Hydroxide (NaOH) has.

20.0g NaOH x (1 mol / 40.0g NaOh (got amount from Periodic Table))

Basically, it's 20.0g / 40.0g, which gives 0.5 mol since the grams cancel each other. Then we know the pyramid (mol / M x L) so...

0.5 mol x 0.20 M = 2.5 dm3

Answer:

the percentage is 1 every 5

Explanation:

Answer:

factors affecting solubility

Temperature. Basically, solubility increases with temperature. ...

Polarity. In most cases solutes dissolve in solvents that have a similar polarity. ...

Pressure. Solid and liquid solutes. ...

Molecular size. ...

Stirring increases the speed of dissolving.

Explanation:

google hope this helps you thank you for helping me

Answer:

Answer:

1809.9 Grams of Calcium Nitrate

Explanation:

Calcium Nitrate Ca(NO3)2

Molar Mass: 164.086g/mol

Given: 11.03 mol of Ca(NO3)2 x 164.086g/mol = 1809.9 Grams of Calcium Nitrate

Mole is used to measure the tiny substances such as atoms and molecules. 11.03 moles of calcium nitrate weights 1809.9 grams.

The formula to calculate the mass of the substance,

[tex]\bold {w = m \times n}}[/tex]

Where,

w - mass

m - molar mass = 164.086 g/mol

n - number of moles = 11.03 moles

put the values in the formula,

[tex]\bold {w = 164.086 \times 11.03 }}\\\\\bold {w = 1809.9}[/tex]

Therefore, 11.03 moles of calcium nitrate weights 1809.9 grams.

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Answer:

C) 0.121 M

Explanation:

HCl + H₂O = H₃O⁺ + OH⁻

.121M              .121M

HCl is a strong acid . It will dissociate almost 100 % so the concentration of acid and hydronium ion formed will be equal . It is to be noted that hydronium ion is formed due to association of H⁺ and H₂O . H⁺ is formed due to ionisation of HCl .

So concentrtion of hydronium ion ( H₃O⁺ ) will be .121 M.

Answer: Red Plate Dinner

Explanation:

If we calculate them with formula for area of circle([tex]\pi[/tex][tex]r^{2}[/tex]).

Red Plate - [tex]\pi[/tex][tex]6^{2}[/tex] = 36[tex]\pi[/tex]

2 Yellow Plate - 2 * [tex]\pi[/tex][tex]3^{2}[/tex] = 2 * 9[tex]\pi[/tex] = 18[tex]\pi[/tex]

The Red Plate has a bigger area, so the Red plate has more area.

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Answer:

Explanation: If the rate doubles when the concentration of reactant is doubled, the reaction is the first-order. If the rate becomes 4-fold times (quadruples) when the concentration of the reactant is doubled, the reaction is the second-order and similarly, the third, the fourth, and the higher orders.

Answer:

Flerovium

Explanation:

Answer:

Fl or flerovium. Atomic number is the number above the element on a periodic table.