Help me balance this equation please.
NaCl + H2O —→ Cl2+ NaOH + H2

Answer:

its is letter c is your answer

Explanation:

I hope this help

Explanation:

M = molar mass

p= percentage abundance

\(rel.atm.mass = \frac{ M1p1 + M2p2 + M3p3}{100} \\ r.a.m = \frac{24 \times 78.99 + 25 \times 10 + 26 \times 11.01}{100} \\ r.a.m = \frac{1895.76 + 250 + 286.26}{100} \\ = \frac{2432.02}{100} \\ 24.32\)

BRAINLIST

Answer:

if it is hydroxide

Explanation:

when metal. and non-metal most the time reacts and the none metal is hydroxide u can easily say it Is base

Explanation:

1. b is correct because 10^-2 is 1/100. multiplying that by 1.862 is 0.01862

2. 6 feet 10 inches = 82 inches. multiplying 82 by 2.54 we get 208.28. there are only two sig figs so it's 210 cm, not 0.21 cm.

3. 25.2 x 39370 = 992000, which is 9.92 x 10^5.

Answer:

d

Explandation:

Answer:

A.

Explanation:

Because the first organism was bacteria and bacteria does not need oxygen to grow

The volume of the 1.70 M solution that should be used to prepare 2.00 L of the 0.200 M solution is approximately 0.235 L.

Given information,

C₁ = 1.70 M

C₂ = 0.200 M

V₂ = 2.00 L

Now,

C₁V₁ = C₂V₂

Where:

C₁ = concentration of the initial solution

V₁ = volume of the initial solution

C₂ = concentration of the final solution

V₂ = volume of the final solution

1.70 × V₁= 0.200 × 2.00

1.70 V₁ = 0.400

V₁ = 0.400 / 1.70

V₁ = 0.235 L

Therefore, the volume of the 1.70 M solution that should be used to prepare 2.00 L of the 0.200 M solution is approximately 0.235 L.

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Answer:

True

Explanation:

correct me if I am wrong

Answer:

True

Explanation:

If you cover cup in soap it will be a lot more slippery than it was before, if you reshaped a car wheel to have less treads then it would have much less friction.

MgCO3 (magnesium carbonate) is more soluble compared to other carbonates because it forms weaker ionic bonds in its crystal lattice structure, which are more easily broken when in contact with water.

Weaker ionic bonds in MgCO3 make it more soluble than other carbonates.

The solubility of MgCO3 is determined by the strength of the ionic bonds in its structure, and it is more soluble due to weaker bonds that are easily broken by water.

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Answer:

Electrons accelerated to high velocities travel in straight lines through an empty cathode ray tube and strike the glass wall of the tube, causing excited atoms to fluoresce or glow.

Explanation:

The entropy of formation of

(a) H20        is 69.95 J/mol K.

(b) H2O       is 188.84 J/mol K.

(c) Fe2(SO) is  315.7 J/mol K.

(d) Al2C3.   is  315.7 J/mol K.

To determine the entropy of formation (ΔS) for the following compounds at 25°C: (a) H2O, (b) H2O, (c) Fe2(SO), and (d) Al2C3. However, it seems there's a typo in compound (c). I assume you meant Fe2(SO4)3. Here are the entropy values for the compounds you provided:

(a) H2O (liquid): The entropy of formation (ΔS) for liquid water at 25°C is 69.95 J/mol K.

(b) H2O (gas): The entropy of formation (ΔS) for water vapor at 25°C is 188.84 J/mol K.

(c) Fe2(SO4)3: The entropy of formation (ΔS) for iron(III) sulfate at 25°C is 315.7 J/mol K.

(d) Al2C3: The entropy of formation (ΔS) for aluminum carbide at 25°C is 315.7 J/mol K.

These values are obtained from standard reference tables and can be used for various thermodynamic calculations involving the compounds mentioned.

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There are 1.81 × 10^24 caffeine molecules (C₈H₁₀N₄O₂) in 3 moles of C₈H₁₀N₄O₂.

One mole of a substance has 6.022 × 10²³ particles. This number is known as Avogadro's number. The molecular mass of caffeine is 194.19 g/mol. Thus, 3 moles of caffeine have a mass of 3 × 194.19 = 582.57 g. Moles = Mass/Molecular mass = 582.57 g / 194.19 g/mol = 3 moles. 1 mole of caffeine contains 6.022 × 10²³ molecules. Thus, 3 moles of caffeine contain 3 × 6.022 × 10²³ = 1.81 × 10²⁴ molecules.

Caffeine has the chemical formula C₈H₁₀N₄O₂. Therefore, 1 molecule of caffeine contains 8 carbon atoms, 10 hydrogen atoms, 4 nitrogen atoms, and 2 oxygen atoms. Therefore, the total number of atoms in one molecule of caffeine = 8 + 10 + 4 + 2 = 24. Hence, 3 moles of caffeine will contain 1.81 × 10²⁴ caffeine molecules x 24 atoms/molecule = 4.34 × 10²⁵ atoms.

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Based on the situation provided, vanadium(v) oxide acts as a catalyst in this process.

A catalyst is a substance that increases the rate of a chemical reaction without being consumed itself. Catalysts alter the mechanism of a reaction by lowering the activation energy of the transition state. As a result, it speeds up the reaction without being consumed by the reaction. This is the reason why catalysts are so important in chemical processes.

Vanadium (V) oxide is used as a catalyst in the manufacture of sulfuric acid since the oxidation of sulfur dioxide to sulfur trioxide is very slow in the absence of a catalyst.

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The statement "Syrah, Shiraz, and Petite Syrah are related because they are essentially the same varietal" is False. Syrah, Shiraz, and Petite Syrah are not the same varietal, but they are related to each other. The varietal known as Syrah is an Old World grape that is grown in France's Rhône Valley.

The statement "Syrah, Shiraz, and Petite Syrah are related because they are essentially the same varietal" is False. Syrah, Shiraz, and Petite Syrah are not the same varietal, but they are related to each other. The varietal known as Syrah is an Old World grape that is grown in France's Rhône Valley. Shiraz, on the other hand, is a New World grape that is grown primarily in Australia, but also in other parts of the world, including South Africa, New Zealand, and the United States. Both Syrah and Shiraz produce full-bodied wines that are known for their deep color, spicy notes, and high tannin content.

However, Shiraz wines tend to be fruitier and more jammy than Syrah wines. Petite Sirah is another grape varietal that is related to both Syrah and Shiraz. Petite Sirah is a cross between Syrah and Pelours in, another grape varietal that is grown in France. Petite Sirah is grown primarily in California and produces wines that are known for their dark color, high tannin content, and bold, jammy flavors. So while Syrah, Shiraz, and Petite Sirah are related to each other, they are not the same varietal.

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Answer:

protons and neutrons

Explanation:

The electrons are first placed in the higher energy level orbitals before pairing up. The chromium ion (Cr2+) has a d4 configuration with six water (H2O) ligands.

Since there are four unpaired electrons in the t2g orbitals, the complex has a magnetic moment of 4.9 BM (Bohr magnetons) which indicates that it is paramagnetic. Therefore, the main answer is 4 unpaired electrons.
1. Determine the oxidation state of Cr in the complex.
2. Determine the electron configuration of Cr in that oxidation state.
3. Count the number of unpaired electrons.

Step 1: Oxidation state of Cr
[Cr(H2O)6]2+ has a charge of +2, so the oxidation state of Cr is +2.
Step 2: Electron configuration of Cr
Cr has an atomic number of 24, so its electron configuration is [Ar]3d5 4s1. In the +2 oxidation state, it loses two electrons, leaving [Ar]3d4.
Step 3: Count unpaired electrons

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Answer:

d. they are both involved in the division of somatic cells​

Explanation:

Mitosis and meiosis are both types of cell divisions that occur in the system of living organisms. However, mitosis and meiosis are different in the type and number of daughter cells they give rise to and also where they occur.

Mitosis, which takes place in the SOMATIC OR BODY CELLS of living organisms, give rise to two daughter cells that are genetically identical to their parent cell. On the other hand, meiosis takes place strictly in the CELLS OF REPRODUCTIVE ORGANS, and gives rise to four genetically different daughter cells.

To Find :

The STP moles of 67.2 L CO.

Solution :

We know, molar volume at STP is used to converted into moles by :

1 moles = 22.4 L STP

So, number of moles in 67.2 L CO is :

\(n=\dfrac{67.2}{22.4}\\\\n = 3 \ moles\)

Therefore, number of STP moles are 3.

Hence, this is the required solution.

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

Explanation:

[He]2s²2p⁶

269.8 temperature in kelvin of your freezer if the new volume of the bottle is 1.81

Kelvin having a thermometric scale on which the unit of measurement equals the Celsius degree and according to which absolute zero is 0 K, the equivalent of −273.15°C

Here given data is an empty 2.00 L soda bottle at room temperature (25.0°C) means 298.15 kelvin and then you put the soda in the freezer then the process is assumed to be a constant pressure and moles

Charles law applies V₂/V₁ = T₂/T₁

Then you have to use absolute temperature scale means in kelvin and 2 be the state solving

T₂ = T₁(V₂/V₁) = 298.15 K (1.81 L / 2L)

= 269.8 temperature in kelvin in the freezer if the new volume of the bottle is 1.81L

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To prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.The ratio of benzoic acid to sodium benzoate in the buffer solution using the Henderson-Hasselbalch equation.

To prepare a pH 4.00 buffer solution using benzoic acid and sodium benzoate, we need to calculate the appropriate volumes of the 0.100 M benzoic acid and 0.240 M sodium benzoate solutions.

First, we need to determine the ratio of benzoic acid to sodium benzoate in the buffer solution. The Henderson-Hasselbalch equation can help us with this calculation:

pH = pKa + log([A-]/[HA])

Given that the pH is 4.00 and pKa is 4.20, we can rearrange the equation:

log([A-]/[HA]) = pH - pKa

log([A-]/[HA]) = 4.00 - 4.20

log([A-]/[HA]) = -0.20

Next, we take the antilog of -0.20 to find the ratio of [A-] to [HA]:

[A-]/[HA] = antilog(-0.20)

[A-]/[HA] = 0.63

The ratio of [A-] to [HA] is 0.63.

Now, let's calculate the volumes of each solution needed. Let's assume x represents the volume (in mL) of the 0.100 M benzoic acid solution and y represents the volume (in mL) of the 0.240 M sodium benzoate solution.

Since the total volume is 100.0 mL, we have the equation: x + y = 100

Considering the ratio of [A-] to [HA] as 0.63, we can write the equation: y/x = 0.63

Solving these two equations simultaneously will give us the volumes of each solution:

x + y = 100

y/x = 0.63

By substituting y = 0.63x from the second equation into the first equation, we get:

x + 0.63x = 100

1.63x = 100

x = 61.35 mL (rounded to two decimal places)

Substituting this value back into the equation x + y = 100, we find:

61.35 + y = 100

y = 38.65 mL (rounded to two decimal places)

Therefore, to prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.

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Answer:

72.58 g/mol

Explanation:

mark me brainless if I am ✅

The relationship between the rate of diffusion and the molar mass is given by Graham's law.  A gas diffusing 1/6 times faster than hydrogen will have a molar mass of 72.58 g/mol. Thus, option d is correct.

Graham's law states the inverse relationship between the rate of diffusion and the square root of the molar mass of the gas. It is given as,

Rate = 1 ÷ √M

The molar mass of the gas that diffuses 1/6 times faster than hydrogen is calculated as,

R₁ ÷ R₂ = √ (M₂ ÷ M₁)

Here,

The molar mass of hydrogen = M₁

The molar mass of unknown gas = M₂

Rate of diffusion of hydrogen gas = R₁

Rate of diffusion of unknown gas = R₂ = 1 / 6 R₁

Substituting values:

R₁ ÷ 1/6 R₁ = √M₂ ÷ 2

6 × 1.414

= 8.485

= 84.85 g/mol ≈ 72.58 g/mol

Therefore, option d. 72.58 g/mol is the molar mass of unkown gas.

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Answer:

4

Explanation:

The half life of the sample is 14 hours and the time taken is 97 hours.

We know that radioactivity has to do with the fact that there is element decomposed within a given time frame. Let us note that the half life has to do with the time taken for only half of the radioactive material to remain.

We can see that the time that is taken for only half of the sample to remains is about 14 hours.

We now know that;

N/No = (1/2)^t/\(t_{\frac{1}{2} }\)

N = Number of atoms

No = Initial number of atoms

t = time taken

\(t_{\frac{1}{2} }\) = The half life

Then we have;

2.5/320 = (1/2)^ t/14

7.8 * 10^ -3 = (0.5)^t/14

ln(7.8 * 10^ -3 ) = t/14 ln(0.5)

t = ln(7.8 * 10^ -3 ) / ln(0.5) * 14

t = -4.8/-0.693 * 14

t = 97 hours

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Answer: B. No, fluorine is always assigned an oxidation number of -1.

Explanation:

The concentration of PO₄³⁻(aq) in a saturated aqueous solution of Cu₃(PO₄)₂(s) is approximately 4.61 x 10⁻⁸ M.

To calculate the concentration of PO₄³⁻(aq) in a saturated aqueous solution of Cu₃(PO₄)₂(s), you can use the Ksp expression for the dissolution of Cu₃(PO₄)₂:

Ksp = [Cu²⁺]³[PO₄³⁻]²

Given that Ksp = 1.40 x 10⁻³⁷, let x represent the concentration of PO₄³⁻:

[Cu²⁺] = 3x
[PO₄³⁻] = x

Substitute these values into the Ksp expression:

1.40 x 10⁻³⁷ = (3x)³ * (x)²

Now, solve for x (concentration of PO₄³⁻):

x⁵ = 1.40 x 10⁻³⁷ / 27
x = (1.40 x 10⁻³⁷ / 27)^(1/5)
x ≈ 4.61 x 10⁻⁸ M

The concentration of PO₄³⁻(aq) in a saturated aqueous solution of Cu₃(PO₄)₂(s) is approximately 4.61 x 10⁻⁸ M.

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Explanation:

Solution — 1 molecule of O2 = 2 oxygen atoms So, 1 mole of O2 = 2 mole oxygen atoms = 2 × 6.022 × 1023 = 12.044 ×1023 oxygen atoms.

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.2044 ×10²⁴ oxygen atoms are there in a 2 moles of oxygen atoms.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of mole of O\(_2\)= 2 mole

number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)

substituting all the given values in the above equation, we get

number of  oxygen atoms = 2 × 6.022 × 10²³

number of  oxygen atoms= 1.2044 ×10²⁴ oxygen atoms.

Therefore,  1.2044 ×10²⁴ oxygen atoms are there in a 2 moles of oxygen atoms.

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