12. In a reaction, 20.50g of NaOH is reacted with excess Cu(NO3)2. (6pt)

2 NaOH(aq) + Cu(NO3)2(aq) → Cu(OH)2(s) + 2NaNO3(aq)

a. What is the theoretical yield of Cu(OH)2?

b. If the actual yield of copper(II) hydroxide was determined to be 75.0g, what is the
percent yield?

The other compound that makes up most of the other gases in the table is water vapor.

Water vapor is not listed in the table because it is not a pollutant. However, it is a significant component of exhaust gas, and it can contribute to smog formation. Water vapor is formed when the fuel in a petrol engine is burned. The combustion process produces water as a byproduct.

The amount of water vapor in the exhaust gas depends on the temperature of the combustion process. At higher temperatures, more water vapor is produced. Water vapor is not a pollutant in itself, but it can contribute to smog formation.

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Complete question:

this table shows the percentages of some gases in the exhaust from a petrol engine

nitrogen 68

carbon dioxide 15

carbon monoxide 1

oxygen 0.75

nitrogen oxides 0.24

hydrocarbons 0.005

sulphur dioxide 0.005

other gases

what is the name of the other compound that makes up most of the other gases in the table?

Answer:

The concentration of the copper (II) sulfate solution is 2.06 * 10^2 μmol/L or 2.06 * 10^2 μM

Explanation:

The concentration of a solution is the amount of solute dissolved in a given volume of solution. In this case, the concentration of the copper(II) sulfate solution in micromoles per liter (symbol ) is the number of micromoles of copper(II) sulfate dissolved in each liter of solution. To calculate the micromoles of copper(II) sulfate dissolved in each liter of solution you must divide the total micromoles of solute by the number of liters of solution.

Here's that idea written as a formula: c= n/V

where c stands for concentration, n stands for the total micromoles of copper (II) sulfate and V stands for the total volume of the solution.

You're not given the volume of the solution in liters, but rather in milliliters. You can convert milliliters to liters with a unit ratio: V= 150. mL * 10^-3 L/ 1 mL = 0.150 L

Next, plug in μmol and liters into the formula to divide the total micromoles of solute by the number of liters of solution: c= 31 μmol/0.150 L = 206.66 μmol/L

Convert this number into scientific notation: 2.06 * 10^2 μmol/L or 2.06 * 10^2 μM

Answer:

Explanation:

The valid conversion factor among the given options is 100ml/1L. This conversion factor represents the relationship between milliliters (ml) and liters (L), where 1 liter is equal to 1000 milliliters. Therefore, 100 ml is equivalent to 0.1 liters or 0.1 L.

The other options are not valid conversion factors because they do not represent a relationship between two compatible units of measurement. For instance, 1ml/100L represents a relationship between milliliters and liters, which are compatible units, but the ratio is not practical or commonly used in conversions. Similarly, 1 cm^3/1 L represents a relationship between cubic centimeters and liters, which are also compatible units, but the ratio is not commonly used in conversions. Lastly, 10cm/1m represents a relationship between centimeters and meters, which are compatible units, but the ratio does not represent a conversion factor.

In summary, the only valid conversion factor among the given options is 100ml/1L.

Answer:

Ca - 66%, P - 34%

Explanation:

So, this is the formula we can use to find the amount of each element:

Element count * Atomic mass = Mass

Plug in our elements for this:

Ca - 3*40.078=120.234

P - 2*30.973=61.946

Now, to find the percentage of mass, we must find total mass, and divide the two elements mass count by this total mass:

120.234+61.946=182.18

Now divide each element mass by the total mass:

Ca - 120.234/182.18=0.6599(Round to 0.65)

P - 61.946/182.18=0.34002(Round to 0.34)

Then multiply both numbers by 100 to get the percentage:

Ca - 65%

P - 34%

So these our your two answer!

Hope this helps!

Answer:

The structural formula for diethylamine is C4H11N

Explanation:

why did u gave answer before

Explanation:

1) Weather refers to temporary atmospheric conditions that are occurring at a given point and time. Climate refers to the average weather conditions that occur in an area over an extended period.

2) Regions nearer the equator receives sunlight more directly than regions located farther from the equator. As a result, regions near the equator experience warm temperatures all year. Regions located farther from the equator experience more temperature fluctuations.

3) An air mass containing extremely cold, dry air would likely be classified as a continental arctic air mass.

4) The ITCZ is the point at which trade winds from the Northern Hemisphere converge with trade winds from the Southern Hemisphere. This area typically experiences calm weather.

5) Polar jet streams occur at higher latitudes. They separate the polar easterlies from the prevailing westerlies. Tropical jet streams occur at lower latitudes. They separate the trade winds from the prevailing westerlies.

Answer:

A: computers, is the answer I believe

(a) the molecular formula of the compound is C₆H₁₂.

(b)  the molecular formula of the compound is NH₂Cl.

(a) Given the empirical formula CH₂ and a molar mass of 84 g/mol, we need to determine the molecular formula. To do so, we need to find the factor by which the empirical formula needs to be multiplied to achieve the given molar mass.

The empirical formula CH₂ has a molar mass of 14 g/mol (12 g/mol for carbon + 2 g/mol for hydrogen).

To find the factor, we divide the molar mass by the empirical formula mass:

Factor = (molar mass) / (empirical formula mass) = 84 g/mol / 14 g/mol = 6

Therefore, the molecular formula is obtained by multiplying the empirical formula by the factor:

CH₂ × 6 = C₆H₁₂

Thus, the molecular formula of the compound is C₆H₁₂.

(b) Given the empirical formula NH₂Cl and a molar mass of 51.5 g/mol, we follow a similar approach.

The empirical formula NH₂Cl has a molar mass of 51.5 g/mol (14 g/mol for nitrogen + 2 g/mol for each hydrogen + 35.5 g/mol for chlorine).

To find the factor, we divide the molar mass by the empirical formula mass:

Factor = (molar mass) / (empirical formula mass) = 51.5 g/mol / 51.5 g/mol = 1

Therefore, the molecular formula is the same as the empirical formula: NH₂Cl

Hence, the molecular formula of the compound is NH₂Cl.

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The metal X has an approximate molar mass of 42.36 g/mol and the metal is most likely calcium.

The molar mass of the metal carbonate XCO₃ and identify the metal X, we need to calculate the number of moles of XCO₃ and CO₂ using the given masses and molar masses.

The molar mass of CO₂ (carbon dioxide) is 12.011 g/mol (for carbon) + 2 * 15.999 g/mol (for oxygen) = 44.01 g/mol.

The number of moles of CO₂ can be calculated using the formula:

moles of CO₂ = mass of CO₂ / molar mass of CO₂

moles of CO₂ = 0.855 g / 44.01 g/mol

moles of CO₂ ≈ 0.01944 mol

Since the reaction stoichiometry is 1:1 between XCO₃ and CO₂, the number of moles of XCO₃ is also approximately 0.01944 mol.

molar mass of XCO₃ = mass of XCO₃ / moles of XCO₃

molar mass of XCO₃ = 2.012 g / 0.01944 mol

molar mass of XCO₃ ≈ 103.38 g/mol

The molar mass of XCO₃ is approximately 103.38 g/mol.

To determine the metal X:

molar mass of X = molar mass of XCO3 - molar mass of CO3

molar mass of X = 103.38 g/mol - (12.011 g/mol + 3 * 15.999 g/mol)

molar mass of X ≈ 42.36 g/mol

Metal X is most likely Calcium that has a molar mass of 40 g/mol

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The mass percent of Cl in SiCl2I2 is 20.13%.

The chemical formula of SiCl2I2 can be broken down into its constituent elements, Si, Cl, and I. The total mass of the compound is the sum of the masses of these elements. Then, we can find the mass percentage of chlorine in SiCl2I2.
The mass of Si is 28.09 g/mol, the mass of Cl is 35.45 g/mol, and the mass of I is 126.9 g/mol. Therefore, the molar mass of SiCl2I2 is:
Molar mass of SiCl2I2 = (28.09 g/mol) + 2(35.45 g/mol) + 2(126.9 g/mol)
= 352.79 g/mol
To find the mass percentage of chlorine in SiCl2I2, we need to determine the mass of chlorine in the compound. There are two chlorine atoms in the molecule, so the mass of chlorine is:
Mass of Cl = 2(35.45 g/mol) = 70.9 g/mol
Now, we can calculate the mass percentage of Cl in SiCl2I2:
Mass percentage of Cl = (Mass of Cl / Molar mass of SiCl2I2) × 100%
= (70.9 g/mol / 352.79 g/mol) × 100%
= 20.13%
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The carbonile subtracts a H atom from the HCl in the initial step. The OH+ will then transfer the charge to the carbon, which is tertiary and readily stabilized, via resonance. After that, the chlorine subtracts a hydrogen atom to create a stable double bond on the charged carbon. Now, this combines with a second benzaldehyde molecule, and the result is a condensation product.

Depending on their intended use, heat exchangers are optimized. The minimum initial cost, minimum operating cost, maximum efficiency, minimal pressure drop, minimal heat transfer area, minimal weight, or material are the most frequently used optimization criteria for heat exchangers.

The heat model is a behavioral approach that can be used to deal with complaints. It seeks to calm down and defuse the complainants' anger while, whenever possible, focusing on finding a solution to the problem or issue.

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the possible quantum numbers (ordered n, ℓ, mℓ ) are:Option B.5, 3, -3 and Option C. 4, 3, -2

The quantum numbers n, ℓ, mℓ represent respectively the principal quantum number, the orbital angular momentum quantum number and the magnetic quantum number.

These are the three most important quantum numbers. T

here is another quantum number called the spin quantum number, denoted by ms.

Let's see which of the given quantum number sets is possible.2, 1, 3 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. 5, 3, -3 is possible.4, 3, -2 is possible. -4, 3, 1 is not possible.

For any value of ℓ, mℓ must be between -ℓ and +ℓ. e. 2, 1, -2 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. f. 3, 2, 2 is not possible because for ℓ = 2, mℓ can only be -2, -1, 0, +1, or +2. g. 3, 3, 1 is not possible because for any value of ℓ, mℓ must be between -ℓ and +ℓ.

Therefore, the possible quantum numbers (ordered n, ℓ, mℓ ) are:5, 3, -34, 3, -2

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It will take 1200 minutes for the concentration of reactant to drop to 0.025 mol/liter.

The rate of reaction is given by the following equation:

\(-r_{A} = \frac{200C_{A} C_{EO}}{2+C_{A}} \frac{mol}{liter . min}\)

where

\(-r_{A}\) = is the rate of reaction (mol/liter/min)

\(C_{A}\) = is the concentration of reactant A (mol/liter)

\(C_{EO}\) =  is the concentration of enzyme E (mol/liter)

Given that \(C_{EO}\) = 0.001 mol/liter and \(C_{AO}\) = 10 mol/liter. Find the time needed for the concentration of reactant to drop to 0.025 mol/liter.

Set up the following equation and solve for t:

\(C_{AO} - C_A = -r_A t\)

Substituting the given values:

10 - 0.025 = -(200)(0.025)(0.001)t

Solving for t:

t = 1200 min

Therefore, it will take 1200 minutes for the concentration of reactant to drop to 0.025 mol/liter.

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Answer:

341.9897

Explanation: look at the atomic mass of Zinc, 65.39. Now, multiply how many moles you have by that atomic mass.

Answer: We are told to find the number of atoms present in 1 g of Zn. Since the molar mass of Zn is equal to 65.38 g/mol, and we know that 1 mole of Zn has a mass equal to 65.38 g, we will calculate the number of atoms as follows: The number of atoms in 1 mole of Zinc is equal to 6.022×1023atoms 6.022 × 10 23 a t o m s .

There are two atoms with mass numbers of 2 best describes the mass numbers of the atoms in the reaction

The sum of protons and neutrons in an atomic nucleus is known as the mass number, often known as the atomic mass number or nucleon number. It roughly equates to the atom's atomic mass given in atomic mass units.

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Answer:

2 answers

Explanation:

Why the ratio of dioxygen to carbon dioxide is 1:2 on the basis of moles, i.e. on the basis of number of particles .

In determining the shape of a molecule, the electron geometry includes both bond pairs and lone pairs. But the molecular geometry excludes the lone pairs while determining the shape of molecule.

The valence shell electron pair repulsion theory is proposed by the scientists Sidgwick and Powell to predict the shapes of the molecules. This theory is based on the assumption that valence shell electron pairs repel each other and are oriented in space as far apart as possible to minimize the mutual repulsion.

            Electron geometry                               Molecular shape

NO₂⁺               Bent                                                        Linear

PCl₃                Tetrahedral                                  Trigonal pyramidal

BCl₂H             Bent                                                Trigonal planar

ClO₃⁻            Tetrahedral                                        Trigonal pyramidal

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Answer:

B

Explanation:

i just read it na, but i forgot the explanation

Answer:

A. and B.

Explanation:

Anion is negative as well as a negative ion.

(Just took the quiz)

Answer:

wings

Explanation:

this is an example of movement because it allows birds to fly in the air

In World War 1, Chlorine gas was used as a toxic, poisonous gas to harm and terminate enemies.

The mass of carbon dioxide gas produced from the 225 g of oxygen gas is equal to 309.4 g.

The theoretical yield of the chemical reaction can be defined as the quantity of product evaluated from stoichiometric calculations.

Given the reaction of the formation of carbon dioxide gas from oxygen gas:

C (s) + O₂  →  CO₂ (g)

From the above equation, one mole of carbon dioxide is produced from one mole of oxygen gas.

The molecular mass of the carbon dioxide =  44 g/mol

Given the mass of the oxygen gas = 225 g

The number of moles of the oxygen gas = 225/32 = 7.03 mol

Therefore, 7.03 mol of carbon dioxide is produced from 7.03 mole of oxygen gas.

The mass of carbon dioxide gas is produced = 7.03 × 44 = 309.4 g

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55.03 moles of KCI are produced when 6743 grams of \(KClO_{3}\) decomposes

To determine the number of moles of KCl produced when 6743 grams of \(KClO_{3}\) decomposes, we need to use the concept of molar mass and the balanced chemical equation.

First, let's calculate the molar mass of \(KClO_{3}\)

The molar mass of potassium (K) is approximately 39.10 g/mol.

The molar mass of chlorine (Cl) is approximately 35.45 g/mol.

The molar mass of oxygen (O) is approximately 16.00 g/mol.

So, the molar mass of \(KClO_{3}\) is:

(39.10 g/mol) + (35.45 g/mol) + (3 * 16.00 g/mol) = 122.55 g/mol.

Now, we need to calculate the number of moles of \(KClO_{3}\):

Number of moles = Mass / Molar mass

Number of moles = 6743 g / 122.55 g/mol = 55.03 mol.

According to the balanced chemical equation:

2\(KClO_{3}\) -> 2 KCl + 3 O2,

we can see that for every 2 moles of \(KClO_{3}\), we obtain 2 moles of KCl.

Therefore, the number of moles of KCl produced will be equal to the number of moles of \(KClO_{3}\) since the ratio is 1:1. Thus, 55.03 moles of KCl will be produced.

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1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

The time taken for 0.240 mole sample of radiuim to decay to 1.88×10¯³ mole is 79.8 days

We'll begin by calculating the number of half-lives that has elapsed.

Original amount (N₀) = 0.240 mole

Amount remaining (N) = 1.88×10¯³ mole

N = 1/2ⁿ × N₀

1.88×10¯³ = 1/2ⁿ × 0.240

Cross multiply

1.88×10¯³ × 2ⁿ = 0.240

Divide both side by 1.88×10¯³

2ⁿ = 0.240 / 1.88×10¯³

2ⁿ = 128

2ⁿ = 2⁷

Thus, 7 half-lives has elapsed

Number of half-lives (n) = 7

Half-life (t½) = 11.4 days

t = n × t½

t = 7 × 11.4

Therefore, the time taken for 0.240 mole sample of radiuim to decay to 1.88×10¯³ mole is 79.8 days

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Lewis structure of the H₂SO₃ molecule is shown in the attached diagram below.

A lewis electron dot structure can be utilized to show the number of bonds, the lone pairs left in the atoms, and the bonding atoms in the molecule.

Lines are used to represent atoms that are bonded with each other and lone pairs of electrons are represented by dot pairs and are drawn next to the atoms.

As the valence electrons of each sulphur atom are equal to is from the electronic configuration of the chlorine atom. The valence electrons in Oxygen atom is six.

First, the total number of valence electrons in the given  molecule is equal to 6 + 2(6) + 1 + 1 = 20.

As each oxygen and sulphur atoms requires only 2 electrons to complete its octet. As the octet completes, the remaining electrons become the lone pairs of atoms. Therefore, each oxygen and sulphue atom has two lone pairs of electrons on it.

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Na+ (g) --> Na+ (aq) AH = -364 kJmol 1 is endothermic reaction. The given reaction is False, As H is negative hence exothermic reaction not endothermic

What is endothermic  reaction?

Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products. These reactions produce a cooling effect by bringing the temperature of the space around them down. Ice cubes absorb heat energy from their surroundings and melt to generate liquid water as an example of an endothermic physical process (no chemical bonds are broken or formed).

False, As H is negative hence exothermic reaction not endothermic

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Answer:

6.35 centimeters

Explanation:

2.5 inches = 6.35 centimeters

Formula:

So, 2.5 inches = 2.5 × 2.54 = 6.35 centimeters.