A graduated cylinder is filled to
10.10 mL with water. A small piece
of granite is placed into the
cylinder, displacing the water to a
volume of 19.45 mL. What is the
volume of the granite in ml?
volume = [?] mL
Round your answer to the hundredths place.
Volume (cm³)

Question: How many grams of NO are obtained from 16.1 g NO2 ?

Explanation: Goodmorning: ) i'm gonna say  2ɴᴏ2 --> 2ɴᴏ + ᴏ2

ᴍᴏʟᴇᴄᴜʟᴀʀ ᴡᴇɪɢʜᴛ ᴏꜰ ɴᴏ2 = 46.0ɢ

ᴍᴏʟᴇᴄᴜʟᴀʀ ᴡᴇɪɢʜᴛ ᴏꜰ ɴᴏ = 30.0ɢ

16ɢ ɴᴏ2 / 46ɢ (ᴍᴡ ᴏꜰ ɴᴏ2)=.3478 ᴍᴏʟ ᴏꜰ 2ɴᴏ2

= .3478 ᴍᴏʟ ᴏꜰ 2ɴᴏ✨

Answer

CO2 and NO are covalent

Explanation:

Which of the following are covalent compounds? Select all that apply.

CaO

CO2

KBr

NO

the atoms ib covalent compounds share electron pairsO

CaO and KBr are ioinic

CO2 and NO are covalent

The covalent compounds are \(CO_2\) and \(NO\).

The covalent compounds are bonded to each other by the mutual sharing of electrons between them referred to as the covalent bond in the structure.

Covalent bonds are chemical bonds formed when two atoms share electrons to achieve a stable electron configuration. In covalent bonding, atoms combine by sharing their outermost electrons to achieve a full valence electron shell.

Covalent bonds typically form between nonmetal elements that have similar electronegativities.

The rest of the compounds are held by the ionic forces of attraction and hence referred to as the ionic compounds. An ionic compound contains a metal and a non-metal to be bonded to each other.

Therefore, the covalent compounds provided in the list are \(CO_2\) and \(NO\).

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Answer:

2H₂ + O₂  ===>  2H₂O

Explanation:

Answer:

Reducing the activation energy and providing an alternative reaction pathway for the reaction to happen

Explanation:

A lower activation energy means that reactants will need less energy to successfully react to make products, meaning that more successful collisions will happen between reactants, increasing the rate of reaction

A catalyst reduces the activation energy of the reaction, speeding it up. By decreasing the activation energy, the energy hurdle that must be cleared for a chemical reaction to take place, catalysts improve the efficiency of this process.

By decreasing the activation energy, the energy hurdle that must be cleared for a chemical reaction to take place, catalysts improve the efficiency of this process.

As a result, catalysts facilitate the formation of chemical bonds between atoms to create novel combinations and new compounds.

A catalyst is a chemical that may be included in a reaction to speed up the process without being consumed. Typically, catalysts shorten the activation energy of a process or alter its mechanism. Proteins called enzymes serve as catalysts in biological processes.

Thus, the catalyst reduces the activation energy of the reaction, speeding it up

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Answer:

Oppositely charged particles attract each other. This attractive force is often referred to as an electrostatic force. An ionic bond is the electrostatic force that holds ions together in an ionic compound.

Explanation:

Hope this helps :)

We would expect to measure a pressure of approximately 75.25 kPa for the gas in the container at the higher temperature of 267 oC.

To determine the expected pressure of the gas in the container at the higher temperature, we can use the combined gas law, which relates the initial and final conditions of temperature and pressure in a fixed volume system. The combined gas law equation is given as:

(P1 * V1) / T1 = (P2 * V2) / T2

Where:

P1 = Initial pressure

V1 = Initial volume (which is fixed in this case)

T1 = Initial temperature

P2 = Final pressure (to be determined)

V2 = Final volume (which is fixed in this case)

T2 = Final temperature

In this scenario, the initial conditions are given as 3 oC (which is equivalent to 276 K) and 38.5 kPa. The final temperature is 267 oC (which is equivalent to 540 K). Since the volume is fixed, we can substitute the given values into the equation:

(38.5 kPa * V1) / 276 K = (P2 * V1) / 540 K

Simplifying the equation, we can cancel out V1:

38.5 / 276 = P2 / 540

Solving for P2:

P2 = (38.5 / 276) * 540 ≈ 75.25 kPa

Therefore, we would expect to measure a pressure of approximately 75.25 kPa for the gas in the container at the higher temperature of 267 oC.

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Answer:

pollution causes smog

Smoke fog, or smog for short, is a type of intense air pollution.

it makes GHG wich is greenhouse gas and it makes the smog to stay inside the earth wich heats the Earth and it causes flood, storm, tornadoes, ect.

We can separate out a small sample of the dyes for identification purposes, but not separate the entire mixture by using chromatography.

Chromatography is a technique of separation of mixtures of liquids according to the nature of those liquids.

To get the process started, the mixture is dissolved in a substance called the mobile phase, which carries it through a second substance called the stationary phase.

The different components of the mixture travel through the stationary phase at different speeds, causing them to separate from one another. The nature of the specific mobile and stationary phases determines which substances travel more quickly or slowly, and is how they are separated. These different travel times are termed retention time.

Therefore, We can separate out a small sample of the dyes for identification purposes, but not separate the entire mixture by using chromatography.

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Answer: C(2)H(5)OH + 3O(2) —> 3H(2)O + 2CO(2)

Explanation:

*The number in parentheses or

( ) represents the subscript of the element

Carbon-2

Hydrogen-6

Oxygen-7

I hope this is helpful.

Answer:

The answer is "Choice a".

Explanation:

In the given question, through the basis of their determined percentage yield, a smaller copper increase in value and less copper has been lost during decanting, but now this mistake in your experiment was the cause of confusion, and the wrong choice can be defined as follows:

Answer:

because the outermost shell of electrons orbiting the nucleus is full, giving these gases no incentive to swap electrons with other elements.

Explanation:

here

Answer:

Answer is in the attachment

An organic substance with the chemical formula C8H16O is 4-methylcycloheptanol. It has a cycloheptane ring with a methyl group (CH3) linked to one of the carbon atoms, making it a cyclic alcohol. In the ring, the hydroxyl group (-OH) is joined to a different carbon atom.

There are seven carbon present in the ring and one carbon of methyl, so 4-methylcycloheptanol contains eight carbon in the structure.

Since this would result in C-C-C bond angles far larger than the tetrahedral angle of around 109.5°, cycloheptane is not a flat molecule. Instead, it is three-dimensional and puckered.

The structure of "4-methylcycloheptanol" is attached in the image below.

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In 4.38 × 10^21 molecules of water, there are approximately 0.073 moles.

To calculate the number of moles, we can use Avogadro's number, which states that 1 mole of a substance contains 6.022 × 10^23 molecules. So, by dividing the given number of molecules (4.38 × 10^21) by Avogadro's number, we can find the number of moles.

Now, let's explain the process in detail. Avogadro's number is a constant that represents the number of particles (atoms, molecules, etc.) in one mole of a substance. It is approximately 6.022 × 10^23. Therefore, if we divide the given number of molecules by Avogadro's number, we can determine the number of moles.

In this case, we divide 4.38 × 10^21 molecules by 6.022 × 10^23 molecules/mole, resulting in approximately 0.073 moles.

Significant figures play an important role in reporting the answer. The given number of molecules has three significant figures (4, 3, and 8), so our answer should be reported with three significant figures as well. Therefore, the number of moles is approximately 0.073.

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Given:98.1 mL of 5 M potassium hydroxide is mixed with 39.9 mL of 4.5 M Iron (III) acetate resulting in a precipitate of Iron (III) hydroxide.To calculate the theoretical yield in grams of Iron (III) hydroxide, the first step is to balance the chemical equation for the reaction that takes place between potassium hydroxide and iron (III) acetate. 3KOH + Fe(C2H3O2)3 → Fe(OH)3 + 3KC2H3O2The balanced chemical equation for the reaction that takes place between potassium hydroxide and iron (III) acetate can be represented as follows;3KOH + Fe(C2H3O2)3 → Fe(OH)3 + 3KC2H3O2The molar mass of Fe(OH)3 is calculated as follows;Molar mass of Fe(OH)3 = Atomic mass of Fe + (3 x Atomic mass of O) + (3 x Atomic mass of H) = (55.85 g/mol) + (3 x 16 g/mol) + (3 x 1 g/mol) = 106.85 g/molThus the molar mass of Fe(OH)3 is 106.85 g/mol.To determine the theoretical yield of Iron (III) hydroxide we must first determine the limiting reactant (the reactant that is fully consumed in the reaction) among potassium hydroxide and iron (III) acetate.Limiting ReactantIn order to find out the limiting reactant among potassium hydroxide and iron (III) acetate, we will first find out the number of moles of each using the formula;Moles = Concentration x Volume in Liters (L)Moles of KOH = Concentration of KOH × Volume of KOH = 5 M × (98.1 mL/1000 mL) = 0.4905 moles Moles of Fe(C2H3O2)3 = Concentration of Fe(C2H3O2)3 × Volume of Fe(C2H3O2)3 = 4.5 M × (39.9 mL/1000 mL) = 0.17955 molesBased on the balanced chemical equation, the mole ratio of KOH to Fe(C2H3O2)3 is 3:1. Hence, the limiting reactant is Fe(C2H3O2)3 since it is lesser in moles compared to KOH. This means that all of the 0.17955 moles of Fe(C2H3O2)3 will be consumed in the reaction while 0.4905 - (0.17955 x 3) = 0.05145 moles of KOH will be left over after the reaction is complete.The theoretical yield is then calculated using the limiting reactant. We can calculate the number of moles of Fe(OH)3 produced from 0.17955 moles of Fe(C2H3O2)3 using the balanced chemical equation. The mole ratio of Fe(C2H3O2)3 to Fe(OH)3 is 1:1. Hence;Moles of Fe(OH)3 = Moles of Fe(C2H3O2)3 = 0.17955 moles. The mass of Fe(OH)3 is then calculated using the formula;Mass = Number of moles × Molar massMass of Fe(OH)3 = Number of moles of Fe(OH)3 × Molar mass of Fe(OH)3 = 0.17955 moles × 106.85 g/mol = 19.179 gTherefore, the theoretical yield of Fe(OH)3 is 19.179 g.

The theoretical yield of iron (III) hydroxide is 19.19 grams.

The balanced chemical equation for the reaction between potassium hydroxide and iron (III) acetate is:

3 KOH + Fe(C₂H₃O₂)₃ → Fe(OH)₃ + 3 KC₂H₃O₂

To calculate the theoretical yield of iron (iii) hydroxide, first, we determine the limiting reagent.

The number of moles of each reactant:

Number of moles (n) = Molarity (M) × Volume (V)

For potassium hydroxide (KOH):

n(KOH) = 5 M × 0.0981 L

number of moles = 0.4905 moles

For iron (III) acetate (Fe(C₂H₃O₂)₃):

number of moles = 4.5 M × 0.0399 L

number of moles = 0.17955 moles

Since the stoichiometric ratio is 1:1, the number of moles of Fe(OH)₃ = 0.17955 moles.

The molar mass of Fe(OH)₃ = 106.88 g/mol

Theoretical yield = Number of moles × Molar mass

Theoretical yield = 0.17955 moles × 106.88 g/mol

Theoretical yield= 19.19 grams

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3.97×1023 molecules C2H6          1 mol  C2H6  

------------------------------------------ x ------------------------------------   = 0.66 mol C2H6

                                                    6.022 x 1023 molec. C2H6

\(2.3+0.005+0.234+60.12=\boxed{62.659 \text{ g}}\)

Madam CJ Walker invented the world’s first hair-straightening formula and the hot comb.

Madam CJ Walker was an American African woman. She was also a political figure and an entrepreneur. She was a social activist. She died at the age of 51.

Madam CJ Walker invented the first-ever hair straightening products and combs. She also invented beauty products. Besides it, she motivates other women to be an entrepreneur and educated.

Therefore, the heated comb and the first hair-straightening formula in history were created by Madam CJ Walker.

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Answer: No, two atoms belonging to the same chemical element are not necessarily identical.

Explanation:

I hope that was helpful

Answer:

There are  

4.517

⋅

10

23

atoms of Zn in 0.750 mols of Zn.

Explanation:

Since we know that there are  

6.022

⋅

10

23

atoms in every mole of a substance (Avogadro's Number), there are  

6.022

E

23

⋅

0.750

atoms of Zn in 0.750 mols of Zn.

Answer:

There are  4.517 ⋅ 10  23 atoms of Zn in 0.750 mols of Zn. have a good day:)

Explanation:

The number of moles of NaCl dissolved in the water to make the given solution is 1 mole.

A mole can be described as a unit that is employed to calculate the count of particles. The particles which are counted are usually identical entities, individually distinct.

The amount of chemical substance can be measured in the terms of the mole and the number of entities in one mole is approximately equal to 6.023 × 10 ²³.

Given, the one liter of a 1 M solution of NaCl.

The concentration of the NaCl solution = 1 M

The molarity of the given solution, \(M = n/V\)

The number of moles of NaCl, n = M ×V = \(\displaystyle {1 mol L^{-1}}\times{1L}\) = 1 mol

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Magnesium metal forms a doubly charged cation. Iodide forms a singly charged anion.

Magnesium comes from Group 2; as a metal it needs to lose 2 electrons to assume a Noble Gas configuration. On the other hand iodine needs to gain 1 electron to assume the xenon configuration. The ion formation reflects this tendency.

Explanation:

Formula for Dichlorine trioxide is: Cl2O3

hope this helps you

have a great day :)

In the given reaction, the limiting reactant is C₆H₆ (benzene).

To determine the limiting reactant as well as calculate the mass of HCl produced, compare the moles of each reactant.

The number of moles for each reactant:

Molar mass of Cl₂ = 35.5 g/mol + 35.5 g/mol = 71 g/mol

Moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

                     = 45 g / 71 g/mol

                     = 0.634 moles of Cl₂

Molar mass of C₆H₆ (benzene) = 12 g/mol + 6(1 g/mol) = 78 g/mol

Moles of C₆H₆ = mass of C₆H₆ / molar mass of C₆H₆

                        = 45 g / 78 g/mol = 0.577 moles of C₆H₆

Determine the stoichiometry between Cl₂ and HCl:

Cl₂ + C₆H₆ → C₆H₅Cl + HCl

Here, we can see that 1 mole of Cl₂ produces 1 mole of HCl.

Thus, the limiting reactant is C₆H₆ (benzene).

Calculate the mass of HCl produced:

Molar mass of HCl = 1 g/mol + 35.5 g/mol = 36.5 g/mol

Moles of HCl produced = moles of C₆H₆ = 0.577 moles

Mass of HCl produced = moles of HCl produced × molar mass of HCl

Mass of HCl produced = 0.577 moles × 36.5 g/mol

                                     ≈ 21.04 g

Therefore, approximately 21.04 grams of HCl will be produced.

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An error during DNA replication would create a gene mutation.

During DNA replication, the genetic information in a cell is copied to make new DNA molecules. However, mistakes can occur during this process, leading to changes in the DNA sequence, which can result in a mutation. Mutations can also be caused by exposure to environmental factors, such as radiation or chemicals, which can damage the DNA molecule directly or affect the cellular processes involved in DNA replication.

Mutations can have a variety of effects on the organism, ranging from no effect to causing serious health problems or even death. Gene mutations can also be inherited from a parent, which can result in genetic disorders or predisposition to certain diseases. Therefore, it is important to understand the mechanisms of gene mutations and their potential impacts on organisms.

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Answer:

\(Y=48\%\)

Explanation:

Hello!

In this case, since the described chemical reaction is:

\(Fe_2S_3+6HCl\rightarrow 3H_2S+2FeCl_3\)

We can see the 6:2 mole ratio between hydrogen chloride (molar mass = 36.46 g/mol) and hydrogen sulfide (molar mass = 34.09 g/mol) and 1:3 between iron (III) sulfide (molar mass = 207.91 g/mol) and hydrogen sulfide. In such a way, we can compute the yielded moles of hydrogen sulfide by each reactant in order to identify the limiting one:

\(n_{H_2S}^{by HCl}=25.0gHCl*\frac{1molHCl}{36.46gHCl}*\frac{3molH_2S}{6molHCl} =0.343molH_2S\\\\n_{H_2S}^{by Fe_2S_3}=25.0gFe_2S_3*\frac{1molFe_2S_3}{207.91gFe_2S_3}*\frac{3molH_2S}{1molFe_2S_3} =0.361molH_2S\)

It means that the HCl is the liming reactant as it produces less moles of hydrogen chloride than the iron (III) sulfide. Therefore, the theoretical yield in grams is:

\(m_{H_2S} =0.343molH_2S_2S*\frac{1molH_2S}{34.09gH_2S}\\\\m_{H_2S}=11.7g\)

Thus, the percent yield is:

\(Y=\frac{5.61g}{11.7g}*100\%\\\\Y=48\%\)

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Answer:

ye, it will be optically active

Explanation:

a compound is said to be optically active if it can optically rotate.

the removal of carboxyl group and release of cabon dioxide from carboxylic acid in acetoacetate synthesis which will result in production of ketone as given the attachment below.