need part 3!! the following answers have been wrong: -42.12, -179.3, 30.514, -42.46, 60.8, -66.40, 777.614

Answer:The pressure exerted by the gas is 100kPa

Explanation:Let's apply the Charles Gay Lussac law, to solve the question.

At constant volume, the pressure varies proportionally with the temperature.

P initial / T° initial = P final / T° final

50kPa / 20°C = P final / 40°C

Temperature has increased the double, so the pressure will be increased, the double too.

100 kPa

If you need more help go to this link https://brainly.com/question/14378507

The mass (in grams) of chlorine gas is needed to react with 251 grams of iron is 479 grams. Option C.

To determine the mass of chlorine gas needed to react with 251 grams of iron, we need to use the stoichiometry of the balanced chemical equation:

2Fe + 3Cl2 → 2FeCl3

From the balanced equation, we can see that 2 moles of iron (Fe) react with 3 moles of chlorine gas (Cl2) to produce 2 moles of iron(III) chloride (FeCl3).

To calculate the mass of chlorine gas, we can follow these steps:

Step 1: Convert the given mass of iron (Fe) to moles.

Using the molar mass of iron (Fe), which is approximately 55.85 g/mol, we can calculate the number of moles of iron:

moles of Fe = mass of Fe / molar mass of Fe

moles of Fe = 251 g / 55.85 g/mol

moles of Fe ≈ 4.5 mol (rounded to one decimal place)

Step 2: Use the mole ratio from the balanced equation to find the moles of chlorine gas (Cl2) needed.

From the balanced equation, we know that 2 moles of Fe react with 3 moles of Cl2. Therefore, the moles of Cl2 can be calculated as:

moles of Cl2 = (moles of Fe / 2) * 3

moles of Cl2 = (4.5 mol / 2) * 3

moles of Cl2 ≈ 6.75 mol (rounded to two decimal places)

Step 3: Convert the moles of chlorine gas to grams.

Using the molar mass of chlorine gas (Cl2), which is approximately 70.90 g/mol, we can calculate the mass of chlorine gas:

mass of Cl2 = moles of Cl2 * molar mass of Cl2

mass of Cl2 = 6.75 mol * 70.90 g/mol

mass of Cl2 ≈ 479 grams (rounded to the nearest whole number) Option C is correct.

For more such question on mass. visit :

https://brainly.com/question/19385703

#SPJ8

Answer:

0.60 moles

Explanation:

From the reaction:

\(2C_2H_2 + 5O_2 \to 4CO_2+2H_2O\)

From above, Only 2 moles of CH2CH2 are required to produce 2 moles of water (H_2O).

As such, 0.6 moles of H2O will require:

x (CH2CH2) × 2 moles of (H_2O)  = 0.6 moles (CH2CH2) × 2 mole of (H_2O)

x mole of  (CH2CH2) = 0.60 moles

∴

0.6 moles of H2O will require 0.60 moles of CH2CH2

Answer:

isoborneol and camphor both have methyl groups that have different shielding zones with -OH and -C=O groups respectively.

Explanation:

Using the knowledge of chemical shift we can see that out of the three methyl groups in isoborneol, there are two methyl groups that are not influenced by the chemical Influence of the -OH functional group while one of the methyl groups is influenced by the -OH functional group.

For Camphor, two out of the three methyl groups are in shielding zones of the Carbonyl group, -C=O. While the last of the three methyl groups is out of the shielding zones of Carbonyl group, -C=O.

2-bromopropane molecules would be most favorable to undergo an E2 reaction rather than an SN2 reaction with NaOH. Here option B is the correct answer.

An E2 reaction occurs when a strong base removes a proton from a beta-carbon adjacent to a leaving group, leading to the formation of a double bond and the departure of the leaving group. An SN2 reaction, on the other hand, involves a nucleophile attacking the carbon bearing the leaving group while the leaving group departs.

The relative favorability of E2 and SN2 reactions depends on the strength of the nucleophile and the base, the steric hindrance around the carbon bearing the leaving group, and the nature of the leaving group.

In this case, NaOH is a strong base, and the molecule that is most favorable to undergo an E2 reaction is the one with the least steric hindrance around the carbon bearing the leaving group, which is 2-bromopropane. The other molecules have more steric hindrance around the carbon bearing the leaving group, making them less favorable to undergo E2 reactions.

To learn more about bromopropane molecules

https://brainly.com/question/489491

#SPJ4

Complete question:

Which of the following molecules would be most favorable to undergo an E2 reaction rather than an SN2 reaction with NaOH?

a) 1-bromopropane

b) 2-bromopropane

c) 1-chloropropane

d) 2-chloropropane

Answer:

Repeated SN2 reactions occur leading to the formation of a racemic mixture

Explanation:

S-2-iodooctane is a chiral alkyl halide with an asymmetric carbon atom. The presence of an asymmetric carbon atom implies that it can rotate plane polarized light and thus lead to optical isomerism. The two configurations of the compound are R/S according to the Cahn-Prelong-Ingold system.

However, when S-2-iodooctane is treated with sodium iodide in acetone, repeated SN2 reactions occur since the iodide ion is both a good nucleophile and a good leaving group. Hence a racemic modification is formed in the system with time hence we end up with (±)- Iodooctane.

Answer:

The ability for water to form bubbles

the formation of a meniscus in a graduated cylinder with water

the inability of water to mix with oil

the melting point of a substance

the ability of detergents to clean clothes

Explanation:

Answer:these are the answers

Explanation:

edge

There are 576 different ways to choose a meal.

Promotional offers. A promotional offer is a specific proposition to clients that specifies a reward and patron behavioral standards for earning a reward. the recognition and trouble of the praise are captured thru a retail transaction, purchaser order, rebate claim, rebate redemption, or different patron interplay. a discount is a difference between the unique charge and the lower charge it's far being bought at. a proposal is a deal wherein a product is normally bought at a reduction.

Calculation:-

There are 8 appetizers, 12 entrees, and 6 desserts.

Number of choices =  8 × 12 × 6

                                =  576

Learn more about different meals here:-https://brainly.com/question/8880115

#SPJ1

Answer:

c.warm water before adding the sugar cube

Answer:

C.Warm the warm the water before adding the sugar cube D. Break the sugar cube into smaller pieces

Explanation:

Heating. Speeds up particles causing them to bump and break, further exposing them to the solvent.

Increasing surface area. By crushing or breaking the solid, you are exposing it to more contact with the solute.

Types of luminous flames:

1. Yellow Luminous Flame

2. Smoky Luminous Flame

3. Orange Luminous Flame

4. Blue Luminous Flame

Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:

1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.

2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.

3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.

4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.

It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.

for more questions on luminous

https://brainly.com/question/27163038

#SPJ8

Why does the moon and the sun have the same mass?

Answer: The difference is that, on the moon, you are much lighter than on the Earth, but you still have the same mass

Answer:

1.342g of picolinic acid and 6.743mL of 1.0M NaOH diluting the mixture to 100.0mL

Explanation:

The pKa of the picolinic acid is 5.4.

Using Henderson-Hasselbalch formula for picolinic-picolinate buffer:

pH = pKa + log [Picolinate] / [Picolinic]

Where [] could be taken as moles of each species

5.61 = 5.4 + log [Picolinate] / [Picolinic]

0.21 = log [Picolinate] / [Picolinic]

1.62181 = [Picolinate] / [Picolinic] (1)

Now, both picolinate and picolinic acid will be:

0.100L * (0.109mol / L) =

0.0109 moles = [Picolinate] + [Picolinic] (2)

First, as we will start with picolinic acid, we need add:

0.0109 moles picolinic acid * (123.10g/mol) = 1.342g of picolinic acid

Now, replacing (2) in (1):

1.62181 = 0.0109 moles - [Picolinic] / [Picolinic]

1.62181 [Picolinic] = 0.0109 moles - [Picolinic]

2.62181 [Picolinic] = 0.0109 moles

[Picolinic] = 4.157x10⁻³ moles

And:

[Picolinate] = 0.0109 - 4.157x10⁻³ moles =

To obtain these moles of picolinate ion we need to make the reaction of the picolinic acid with NaOH:

Picolinic acid + NaOH → Picolinate + Water

That means to obtain 6.743x10⁻³ moles of picolinate ion we need to add 6.743x10⁻³ moles of NaOH

6.743x10⁻³ moles of NaOH that is 1.0M are, in mL:

6.743x10⁻³ moles * (1L / 1mol) = 6.743x10⁻³L * 1000 =

Thus, we obtain the desire moles of picolinate and picolinic acid to obtain the buffer we want, the last step is:

Following are the calculation to the mass of picolinic acid:

Let pKa of picolinic acid \(= 5.52\)

form the buffer:  \(\bold{pH = pKa + \log(\frac{A-}{ HA})}\)

Acid concentration\(= 0.109\)

We will require the conjugate, which would be formed by interaction of picolinic acid and NaOH.

calcultion to the need:

\(pH = pKa + \log(\frac{A-}{ HA})\\\\5.61 = 5.52 + \log(\frac{A-}{ HA})\)

 solve for A- by using antilog

 \(0.09 = \log(\frac{A-}{ HA})\\\\1.230= \frac{A-}{HA}\)

 When

\(HA = 0.109\\\\A- = 0.134\)

If \(V = 100 ml\)then

 \(n A- = M\timesV = 0.134 \times 0.1 = 0.0134 \ mol\ of\ A-\)

needed  

\(HA + NAOH \to H_2O + Na^+ \ and \ A-\)  

therefore,

ratios =1:1

we need 0.0134 mol of NaOH  

\(n = M\times V \\\\V = \frac{0.0134}{1} = 0.0134 \ liter \ of\ NaOH\)

 but you also want \(0.109 M\) of free picolinic acid so  

\(n = M\times V = 0.109\times 0.1 = 0.0109\ mol \ of \ Acid\)

 Therefore:  

\(n \ acid = 0.0109 + 0.0134\ mol = 0.0243 \ mol\ of \ acid\)  

Preparation:

 by add volume (19.07) in NaOH

M = 1.0 to the beaker, and by add water until the beaker marks 1  L

 Then add 0.0243 mol of picolinic acid

 \(\to m = 0.0243 \times 123 = 2.9889\ grams\) of picolinic acid  

stir and pH will be that of buffer.

Learn more:

brainly.com/question/17156849

The combination that can be regarded as a mixture among the options is R.

We can define a mixture as a combination of two or more substances that are not chemically combined together. Thus we know that the components that we can find in the mixture do not in any way have a chemical interaction that could lead to the alteration of the chemical properties of each of the substances that are combined.

Having said this, we can see that the combination of  5 g of sugar to 1 L of water is just a mixture since they can be separated by the use of evaporation of the solvent.

Learn more about mixture:https://brainly.com/question/24898889

#SPJ1

Answer: Most synthesis reactions are exothermic because the energy needed to break the reactant bonds is typically less than the energy released when the product bonds form. In other words, the reactant bonds have a lower energy level than the product bonds, so when the reactant bonds are broken and the product bonds are formed, energy is released in the form of heat.

This can be represented by an energy level diagram, in which the reactant bonds are shown at a lower energy level than the product bonds. When the reactant bonds are broken and the product bonds are formed, the energy level of the reaction decreases, indicating that energy is released.

Overall, the fact that most synthesis reactions are exothermic implies that the energy needed to break the reactant bonds is typically less than the energy released when the product bonds form. This is reflected in the energy level diagram, where the reactant bonds are shown at a lower energy level than the product bonds.

Explanation:

Answer:

Synthesis reactions are typically exothermic because the products of the reaction have lower energy than the reactants. This means that the energy needed to break the bonds in the reactants is less than the energy released when the product bonds form.

An energy level diagram can help illustrate this concept. In a synthesis reaction, the reactants are represented by two energy levels on the left side of the diagram, and the products are represented by a lower energy level on the right side. The energy difference between the reactants and the products is represented by the vertical distance between the two sets of energy levels. Since the product energy level is lower than the reactant energy levels, the reaction releases energy and is exothermic.

Here is an example of an energy level diagram for a synthesis reaction:

In this diagram, the vertical distance between the reactant and product energy levels represents the energy released by the reaction. This energy is typically in the form of heat, which is why most synthesis reactions are exothermic.

Answer:

16.51%

Explanation:

The reaction that takes place is

Meaning that the white precipitate that formed is AgCl. Now we convert 0.535 g of AgCl into moles, using its molar mass:

Then we convert 0.00373 moles of AgCl into moles of CaCl₂, using the stoichiometric coefficients:

We convert moles of CaCl₂ into grams, using its molar mass:

Finally we calculate the percent of CaCl₂ by mass in the original mixture:

The percent calcium chloride by mass in the original mixture is 16.4%

The equation of the reaction between calcium nitrate and silver chloride is:

\(\mathbf{CaCl_2 + 2AgNO_3 \to 2 AgCl+Ca(NO_3)_2}\)

Given that;

the number of moles of the precipitated AgCl is:

= 0.535 g / 143.32 g/mol

= 0.0037 moles

From the above reaction, If 2 moles of AgCl are formed  by 1 mole of CaCl2

Then, 0.0037 moles of AgCl will form (0.0037 × 1)/2 moles of CaCl2.

0.0037 moles of AgCl will form 0.00185 moles of CaCl2.

Now, we can say that the number of moles of CaCl2 present in the mixture is =  0.00185 moles

Mass amount of CaCl2 present = 0.00185 moles × 110.98 g/mol

Mass amount of CaCl2 present = 0.205 grams

Finally, the mass percentage   \(\mathbf{=\dfrac{0.205}{1.25}\times 100\%}\)

= 16.4%

Therefore, we can conclude that the percent calcium chloride by mass in the original mixture is 16.4%

Learn more about mass percentage here:

https://brainly.com/question/23991850?referrer=searchResults

Among all the salt , the one  that ionizes to give strongest acid and strongest base, will have pH closest to 7 or neutral. RbI ionize in water to give strongest acid HI and strongest base Rubidium hydroxide.so RbI produces a neutral solution of pH closest to 7.(Option B)

The chemical difference between acids and bases is that acids produce hydrogen ions and bases absorb hydrogen ions. A base is a substance that neutralizes an acid. When bases are added to water, they decompose to form hydroxide ions. This is written OH-. A solution of water with a base added is called an alkaline solution.

Learn more about acid and base here:

https://brainly.com/question/9836972

#SPJ4

Answer:

1.88 A

Explanation:

Let's consider the reduction of copper in an electrolytic cell.

Cu²⁺ + 2 e⁻ ⇒ Cu

We can calculate the charge used to deposit 12.3 g of Cu using the following relations.

The charge used is:

\(12.3 g \times \frac{1 molCu}{63.55gCu} \times \frac{2molElectron}{1molCu} \times \frac{96486C}{1molElectron} = 3.73 \times 10^{4} C\)

We can convert 5.50 h to seconds using the conversion factor 1 h = 3600 s.

5.50 h × 3600 s/1 h = 1.98 × 10⁴ s

The current used is:

I = q/t = 3.73 × 10⁴ C/1.98 × 10⁴ s = 1.88 A

The oxygen atom has no formal charge.

The total of its valence and inner shell electron counts equals 8, which is the atomic number of the substance.

Subtract the total number of valence electrons from the total number of non-bonding electrons and half the total number of bound electrons to determine the formal charge of an atom.

More potent oxidants than ozone, oxygen atoms cause chemiluminescence with a variety of analytes. However, this reagent's analytical use is very constrained.

The arrangement of atoms within molecules is referred to as chemical structure. The atoms of the molecule are shown in the Kekulé Formula or structural formula in the sequence in which they are bonded.

To know about charge

https://brainly.com/question/19886264

#SPJ4

Answer:

Its D and E

Explanation:

i took the test and the other guy who answered gave u half of the answer

hope this helps

pls mark brainliest

The information which can be inferred about the Sun according to the graph include:

This is defined as a pictorial representation of data in an organized manner.

From the graph, we can infer that the Sun has an intermediate temperature and is less brighter than most stars.

Read more about Stars here https://brainly.com/question/21379923

Lithium-7 has 3 protons and 4 neutrons, carbon-6 has 2 protons and 4 neutrons, while beryllium-8 has 4 protons and 4 neutrons.

No matter how many neutrons or electrons are present, the nucleus of a lithium atom always has three protons. The atomic number for lithium is always 3, which is evident given that the lithium atom always has three protons. Yet, the mass number in the isotope with 3 neutrons is 6 and in the isotope with 4 neutrons is 7.

Negatively charged subatomic particles include electrons. A category of subatomic particle having a positive charge is the proton. The strong nuclear force holds the protons together in the atom's nucleus. A subatomic particle with no charge is called a neutron (they are neutral).

To learn more about protons and neutrons visit:

brainly.com/question/29248303

#SPJ9

it is already balanced

REACTANTS

Barium sulfide (BaS) + platinum (Ii) fluoride

PRODUCT

Barium fluoride (BaF2) + Cooperite (PtS)

Hope this answer helps you dear! take care

\(\\ \sf\bull\longmapsto \lambda=\dfrac{c}{v}\)

\(\\ \sf\bull\longmapsto v=\dfrac{c}{\lambda}\)

\(\\ \sf\bull\longmapsto v=\dfrac{3\times 10^8}{685\times 10^{-9}m}\)

\(\\ \sf\bull\longmapsto v=0.00437\times 10^{17}Hz\)

\(\\ \sf\bull\longmapsto v=4.3\times 10^{14}Hz\)

The two functional groups that the aminoacid has according to the picture are amine and carboxyl.

In chemistry and related areas, a functional group can be defined as a group of atoms bonded in a specific molecule that can affect the was the molecule reacts or the specific behavior of it.

In the case of the molecule presented, which is an amino acid, two functional groups can be identified:

Learn more about functional groups in https://brainly.com/question/1356508

#SPJ1

the cell potential for the given galvanic cell is +3.16 V at 25°C. This means that the reaction is strongly favored to occur spontaneously in the direction written, from left to right.

To calculate the cell potential for the given galvanic cell, we need to use the standard reduction potentials of the two half-reactions involved in the cell reaction. From the table of standard reduction potentials, we can find the following half-reactions:

Al³+ (aq) + 3e⁻ → Al(s) E°red = -1.66 V

Au³+ (aq) + 3e⁻ → Au(s) E°red = +1.50 V

To obtain the overall cell potential, we can use the equation:

E°cell = E°reduction (cathode) - E°reduction (anode)

where the cathode is the half-cell where reduction occurs and the anode is the half-cell where oxidation occurs. In this case, we can see that Au³+ is reduced to Au(s) (cathode) and Al(s) is oxidized to Al³+ (anode).

Therefore, we can calculate the cell potential as follows:

E°cell = E°red (Au³+ → Au) - E°red (Al → Al³+)

= (+1.50 V) - (-1.66 V)

= +3.16 V

Thus, the cell potential for the given galvanic cell is +3.16 V at 25°C. This means that the reaction is strongly favored to occur spontaneously in the direction written, from left to right.

To know more about reduction potentials, visit:

https://brainly.com/question/23881200

#SPJ1

The thing that the curves tell us about the distribution of dark matter in these galaxies is option B: Most of the dark matter is in the galaxies’ outskirts.

Beyond the visible borders of galaxies, the velocity of stars remains relatively constant, suggesting that there must be more matter present than what we can see as stars and gas.

When the impact of DE became noticeable, the rotation curves are shown to dip at a specific distance. r. These flat, v = constant, rotation curve data suggest that the amount of dark matter is increasing linearly with r up to great distances from the spiral galaxies' centers.

From the graph you can see they all pointing or going one direction, hence we can deduce that it is option B.

Learn more about dark matter from

https://brainly.com/question/28256017
#SPJ1





Explanation:

aluminium

proton= 13

electron=13

neutron=27

nitrogen

proton= 7

electron=7

neutron= 14

Answer:  **

H-N-H

   |

  H

Explanation:

Look at a periodic table to determine how many electrons you need to account for. Hydrogen (H) only has 1 electron, while Nitrogen (N) has 5. We have three Hydrogen atoms and one Nitrogen atom, so the total number of electrons will be 3 * 1 + 5 = 8 e-.

Now, place the center atom, which will be Nitrogen and place the three Hydrogens on three sides of it as above in the answer. You should use single bonds for this. Each single bond is a pair of electrons, so since we have three single bonds so far, we have accounted for 2 * 3 = 6 electrons. However, we need 2 more electrons for the total of 8. We put these electrons in as a lone pair above Nitrogen.

We check to see if everything follows the octet rule: Nitrogen has three single bonds, so that's 6 e-, as well as one lone pair, so that's another 2 e- for a total of 8 e-. Check. Now look at Hydrogen: H is the only element whose full orbital is 2 e-. Each H has a single bond with Nitrogen, so each does have 2 e-.

Thus, we know this is the correct diagram, and we are done.

Explanation:

A bond line structure of a compound has H N H in linear plane and a hydrogen is branching upward, and the compound is H N (H) H. The nitrogen has two dots at its bottom represents a lone pair of electrons. So ,the correct answer is option C.

The correct Lewis structure for ammonia (\(NH_3\)) is option C. It shows a bond line structure with three hydrogen atoms (H) bonded to a central nitrogen atom (N) in a linear plane.

One hydrogen atom branches upward from the plane. Additionally, the nitrogen atom in this structure has two dots at its bottom, indicating a lone pair of electrons. This arrangement follows the octet rule, as nitrogen has formed three covalent bonds with hydrogen, completing its valence shell. The lone pair on nitrogen gives ammonia its characteristic properties.

Thus, option C accurately represents the Lewis structure of ammonia, showing the bonding and lone pair arrangement of its atoms.

To know more about bond line structure:-

https://brainly.com/question/30639285

Answer:

Oxygen cycle, along with the carbon cycle and nitrogen cycle plays an essential role in the existence of life on the earth. The oxygen cycle is a biological process which helps in maintaining the oxygen level by moving through three main spheres of the earth which are:

Explanation:

The atmosphere is the layer of gases presents above the earth’s surface. The sum of Earth’s ecosystems makes a biosphere. Lithosphere is the solid outer section along with the earth’s crust and it is the largest reservoir of oxygen.

Answer:

Oxygen cycle, circulation of oxygen in various forms through nature. ... Free in the air and dissolved in water, oxygen is second only to nitrogen in abundance among uncombined elements in the atmosphere. Plants and animals use oxygen to respire and return it to the air and water as carbon dioxide (CO2).

Explanation: