Balance each equation by entering the correct coefficients.



NH3 +
O2 →
NO +
H2O

Answer:

Explanation: errors in judgment of an observer when reading the scale of a measuring device to the smallest division. 2. Environmental. For example, unpredictable fluctuations in line voltage, temperature, or mechanical vibrations of equipment.

Both Arabitol and Erythritol are chiral due to the presence of multiple chiral centers in their structures.

Arabitol is derived from arabinose through catalytic hydrogenation. It is chiral because it contains multiple chiral centers, leading to stereoisomers that are non-superimposable mirror images of each other.

Erythritol is derived from erythrose by catalytic hydrogenation. It is also chiral because it has multiple chiral centers, resulting in different Arabitol stereoisomers that cannot be superimposed onto each other.

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Answer:

2 mol CH 4

Explanation:

43.8 x L

----------------                      = 2 mol CH 4

22.4 x L x mol - 1

Scope 1 emissions include things like gas stoves and personal vehicles. Scope 2 emissions include things like businesses that produce carbon emissions but also buy power.

Exhaust gas, also referred to as vehicle emissions, can contain a variety of pollutants and greenhouse gases. Flue gases, which are released through the plant's smokestack, are also produced by power plants that burn fossil fuels, such as coal-fired power plants or natural gas power plants. They are similar to exhaust gases in composition. Having the chemical symbol C and atomic number 6, carbon is an element with the meaning "coal" in Latin. It is nonmetallic and tetravalent, meaning that four of its atom's electrons can be used to create covalent chemical connections. Is called as carbon.

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Answer:

A. Atom

Explanation:

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Answer:

Four seasons occur on Earth

Explanation:

When the Earth has completely one revolution around the Sun, then it has completed 1 year, and four seasons have occurred in the meantime.

Four seasons occur on Earth when the Earth completes a revolution around the Sun.

The following points can be considered:

Therefore the correct answer is Four seasons occur on Earth.

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8.21g of KMnO₄ correspond to 3.13 x 10²² formula units of KMnO₄? avogadro' s number is 6.022 x 10²³

Here,3.13 x 10²² formula units of KMnO₄=1 mole of KMnO₄/avagadro no

1 mole of KMnO₄/6.022 x 10²³

= 3.13 x 10²²/6.022 x 10²³

= 5.197moles of KMnO₄

Now KMnO₄ has molar mass is 158.034g/mol

5.197moles of KMnO₄=158.034/1 mole of KMnO₄

158.034×5.197=821.1g of KMnO₄

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d. water is a polar molecule that's why it can dissolve ionic compounds.

The polarity of water refers to its molecular structure, where the oxygen atom has a partial negative charge and the hydrogen atoms have partial positive charges. This makes water a polar molecule, meaning that it has a positive and negative end. Due to its polarity, water is able to dissolve ionic and polar substances, making it an excellent solvent. This property of water is important in many biological and chemical processes.

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\(\\ \sf\longmapsto [He]2s^1=Lithium \)

\(\\ \sf\longmapsto [Ne]3s^23p^5=Chlorine\)

\(\\ \sf\longmapsto [Ar]4s^2=Calcium\)

The repeating peptide backbone units of proteins contain 3 atoms. By understanding the structure of the "backbone" for peptides and proteins.

The structure of a peptide may be written very simply without illustrating the entire amide synthesis step.

The N-H 2, CH, C double bond O; N-H 2, CH, C double bond O; etc. repeating units make up the peptide backbone.

Nothing more than the use of the amide synthesis process results in the creation of peptides. The amide bond in peptides is often formed in the same sequence that the amino acids are listed. An amino acid's amine end (N terminal) is always on the left and its acid end (C terminal) is always on the right. The diagram on the left illustrates how to write the reaction between glycine and alanine to create the dipeptide glyclalanine. A water molecule is created when hydrogens (red) on the amine and oxygen (red) from the acid combine. The amide bond is created by the joining of the carboxyl oxygen (green) with the amine nitrogen (green).

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The pressure in the vessel is 2.18 atm. Answer choice (D) is correct.

To solve this problem, we can use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First, we need to find the total number of moles of gas in the vessel:

n_total = n_N2 + n_H2 + n_Ar

We can find the number of moles of each gas using the given masses and their molar masses:

n_N2 = 2.80 g / 28.01 g/mol = 0.0999 mol

n_H2 = 0.605 g / 2.02 g/mol = 0.2995 mol

n_Ar = 79.9 g / 39.95 g/mol = 2.00 mol

n_total = 0.0999 mol + 0.2995 mol + 2.00 mol = 2.40 mol

Next, we can rearrange the ideal gas law to solve for the pressure:

P = nRT / V

We need to convert the temperature from Celsius to Kelvin:

T = 25°C + 273.15 = 298.15 K

We can substitute the values and solve for P:

P = (2.40 mol)(0.08206 L·atm/mol·K)(298.15 K) / 26.9 L = 2.18 atm

Therefore, the pressure in the vessel is 2.18 atm. Answer choice (D) is correct.

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Answer:

If it reflects all light, it looks white. Color can help identify a material and, while it is a physical property, it can be used together with chemical experiments when the experiments produce a known material with a specific color.

Explanation:

The ability to reflect light is the inherent and fundamental property of that substance.

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The appropriate alkyl bromide to be used in the malonic ester synthesis of the given carboxylic acid, CH2CH2COH, is option III, CH3CH2Br.

The malonic ester synthesis is a method used to synthesize carboxylic acids by reacting an alkyl halide (in this case, an alkyl bromide) with diethyl malonate. The alkyl bromide serves as the alkylating agent in the reaction, introducing the desired alkyl group into the malonic ester.

In the given options, option III, CH3CH2Br, corresponds to ethyl bromide. This alkyl bromide can be used to alkylate the diethyl malonate, resulting in the desired carboxylic acid, CH2CH2COOH.

Option I, Br, is not a specific alkyl bromide and does not provide the necessary alkyl group for the synthesis.

Option II, CH CH Br, is a polybrominated compound and not suitable for the malonic ester synthesis.

Option IV is not provided in the question.

Option V is not provided in the question.

Therefore, the correct answer is option III, CH3CH2Br, which is the appropriate alkyl bromide to be used in the malonic ester synthesis of the given carboxylic acid.

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Answer:

5425440 μm

Explanation:

From the question given above,

Length (in ft) = 17.8 ft

Length (in μm) =?

Next, we shall convert 17.8 ft to in. This can be obtained as follow:

1 ft = 12 in

Therefore,

17.8 ft = 17.8 ft × 12 in / 1 ft

17.8 ft = 213.6 in

Next, we shall convert 213.6 in to cm. This can be obtained as follow:

1 in = 2.54 cm

Therefore,

213.6 in = 213.6 in × 2.54 / 1 in

213.6 in = 542.544 cm

Finally, we shall convert 542.544 cm to μm. This can be obtained as follow:

1 cm = 10⁴ μm

Therefore,

542.544 cm = 542.544 cm × 10⁴ μm / 1 cm

542.544 cm = 5425440 μm

Therefore, 17.8 ft is equivalent is equivalent to 5425440 μm

Answer:

0.880 (0.88039867109 to be exact)

Explanation:

To convert from molecules to moles, simply divide by Avogadro's number which is 6.02 x 10^23

So, 5.30x10^23/6.02x10^23 = 0.880

Lithium=li

Iron=Fe

Helium=He

I don't say u must have to mark my ans as brainliest but if u think it has really helped u plz don't forget to thank me....

Answer:

lithium symbol=li helium= he and iron =i

Answer:

a. pH = 2.22.

b. [H+] = 2.588 x 10⁻⁴ mol/L.

Explanation:

Acids and Bases => Calculating pH of Acids and Bases.

As we saw before, the formulas to find the pH based on the hydrogen ion concentration [H+], and to find the hydrogen ion concentration [H+] based on the pH are the following, respectively:

So let's see each case:

a. To find the pH of an H+ concentration of 6.02 x 10⁻³ mol/L we use the pH formula:

The answer would be that the pH is 2.22.

b. To find the H+ concentration of a pH of 3.587, we use the [H+] formula:

The answer would be that the hydrogen ion concentration [H+] = 2.588 x 10⁻⁴ mol/L.

12 electrons are transferred in this reaction when 15 g of iron react.

A chemical reaction is described as a process that leads to the chemical transformation of one set of chemical substances to another

The balanced chemical equation for the reaction between iron and oxygen is:

4 Fe + 3 O2 → 2 Fe2O3

The iron has a +3 oxidation state and the oxygen has a -2 oxidation state as products.

There are 4 iron atoms and 6 oxygen atoms in this reaction and if we multiply the oxidation state of each ion by the quantity of each gives us the number of electrons transferred.

Iron gives up (4)*(3) = 12 electrons and oxygen takes (6)*(2) = 12 electrons

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In one milliliter of each solution, there are 0.1 millimoles of the respective chloride.

In one liter of water, 0.10 mole of either sodium chloride, magnesium chloride or aluminum chloride was added. Therefore, to determine the number of moles of each chloride present in one milliliter of the solutions, we will have to calculate the molarity of the solutions using the formula;

Molarity = moles of solute/liters of solution.

Once we have obtained the molarity of the solutions, we can convert to moles per milliliter by multiplying by 0.001.

Let's calculate the molarity of each solution:

Molarity of NaCl solution = 0.10 moles/1 liter = 0.10 M

Molarity of MgCl2 solution = 0.10 moles/1 liter = 0.10 M

Molarity of AlCl3 solution = 0.10 moles/1 liter = 0.10 M

To convert to moles per milliliter, we multiply each molarity by 0.001.

Moles of NaCl in 1 mL of solution = 0.10 M x 0.001 L = 0.0001 moles or 0.1 mmol

Moles of MgCl2 in 1 mL of solution = 0.10 M x 0.001 L = 0.0001 moles or 0.1 mmol

Moles of AlCl3 in 1 mL of solution = 0.10 M x 0.001 L = 0.0001 moles or 0.1 mmol

Therefore, in one milliliter of each solution, there are 0.1 millimoles of the respective chloride.

In conclusion, we can say that the number of moles of each chloride present in one milliliter of the respective solutions is 0.1 millimoles. This was calculated by first finding the molarity of each solution using the formula Molarity = moles of solute/liters of solution. The molarity of each solution was found to be 0.10 M. We then converted the molarity of each solution to moles per milliliter by multiplying by 0.001 L. This gave us the number of moles of each chloride present in one milliliter of the respective solutions.

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The reaction has an 836 kJ/mol total energy.

The reaction is endothermic if the change in enthalpy is positive. A lower enthalpy indicates a process using less energy. Enthalpy (H) is a measure of the overall heat content of the system.

The difference between the energies of the reactants and products can be used to compute the reaction's overall energy.

energy required to break the bonds in Y2 = (732 kJ/mol) × 2 = 1464 kJ/mol

Determine the energy produced during the products' bond formation.

energy released by forming the bonds in XY = (1256 kJ/mol) / 2 = 628 kJ/mol

Determine the reaction's overall energy.

Total reaction energy equals energy released by creating the bonds in XY minus energy expended to break the bonds in Y2.

total energy of the reaction = 1464 kJ/mol - 628 kJ/mol

total energy of the reaction = 836 kJ/mol

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Answer:

data given

molarity 3.2m

moles 50mol

Required volume

Explanation:

from

molarity =mole/volume

3.2=50/v

v=15.62

:.volume is15.62dm^3

Answer:

oxygen should be present for burning to happen,

Answer:

Its not mass

Explanation:

X Mass out.

Answer:

The conventional oven and the convection oven are confused with each other due to their similar look and style, and a lot of their functioning is quite the same as well.

The conventional ovens have existed for over half a century, and have derived their functioning from traditional ovens that are over 4,000 years. They function with a bottom-up heat transfer from a fixed burner source.

The convection ovens were made recently as a way to get better heating results for all types of dishes and recipes, with the introduction of a fan system along with an exhaust which allows the circulation of hot air around the cavity of the oven.

Explanation:

A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.

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Answer:

Charge

Explanation:

A surplus (having "extra") or deficit (having "fewer") of electrons possessed by an object. A charge can cause attractive or repulsive forces which can be observed in some cases (e.g. pith balls, bits of plastic).

The half equivalence point is the point in a titration where exactly half of the acid has reacted with the base, and the other half remains. At this point, the concentration of the acid and its conjugate base are equal.

The buffer region is part of the titration curve where the pH changes slowly with the addition of small amounts of acid or base. In order to calculate the concentration of the conjugate base at the half equivalence point, we need to first determine the number of moles of HF that Veronica started with. This can be calculated using the equation:

moles HF = Molarity x Volume (in liters)
moles HF = 0.467 mol/L x 0.0500 L
moles HF = 0.0234 moles

Since the half equivalence point is in the middle of the buffer region, Veronica must have added half of the amount of KOH required to reach the equivalence point. Therefore, we can calculate the amount of KOH added at the half equivalence point using the:

KOH added = 21.57 mL / 2
KOH added = 10.785 mL

We can convert this to volume in liters:
KOH added = 10.785 mL / 1000 mL/L
KOH added = 0.010785 L

We can now calculate the number of moles of KOH added at the half equivalence point using the equation:
moles KOH = Molarity x Volume (in liters)
moles KOH = 0.160 mol/L x 0.010785 L
moles KOH = 0.001727 moles

Since the reaction between HF and KOH is a 1:1 reaction, this means that 0.001727 moles of HF have reacted at the half equivalence point. This leaves 0.0234 - 0.001727 = 0.0217 moles of HF remaining.

Since the concentration of the conjugate base is equal to the concentration of the acid at the half equivalence point, we can use the equation:

Molarity = moles / Volume (in liters)
Molarity of conjugate base = 0.0217 moles / 0.0500 L
Molarity of conjugate base = 0.434 M

Therefore, the concentration of the conjugate base at the half equivalence point is 0.434 M.

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