uses of sodium chloride in daily life​

Answer:

The answer is "\(\bold{4.97 \times 10^{-2}}\)"

Explanation:

Please find the complete question in the attached file.

Equation:

\(2SO_2+O_2 \leftrightharpoons 2SO_3\)

at \(t=0 3.3 \ \ \ \ \ \ \ \ \ \ 0.79\)

at equilibrium \(3.3-p \ \ \ \ \ \ \ \ \ \ 0.79 - \frac{P}{2} \ \ \ \ \ \ \ \ \ \ \ \ P\)

\(p= 0.47 \ \ atm\\\\SO_2=3.3-0.47 = 2.83 \ \ atm\\\\O_2= 0.74 -\frac{0.47}{2}=0.74-0.235=0.555 \ atm\\\\K_P=\frac{[PSO_3]^2}{[PSO_2]^2[PO_2]}\\\\\)

     \(=\frac{0.47^2}{2.83^2\times 0.555}\\\\=4.97 \times 10^{-2}\)

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Geologic Tools. Geologists use a lot of tools to aid their studies. Some of the most common tools used are compasses, rock hammers, hand lenses, and field books.

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Answer:

D. Two scientists may have different underlying assumptions that lead them to different conclusions about the same thing.

Explanation:

It's all about how a person analyzes data. Some do it mathmatically while others do it logically. By doing it different ways, you may still come to the same conclusion, despite working at the problem in a different way.

According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

According to the law of reciprocal proportions when two elements join to form more than one compound, the weights of one element that combine with a fixed weight of the another are in a ratio of small whole numbers.

In phosphine, phosphorus = 91.1 parts and hydrogen = 8.9 parts

So, 8.9 pads of hydrogen combine with phosphorus = 91.1 parts .

1 part of hydrogen combine =  91.1 / 8.9

= 10.24 parts

Similarly,

for water 88.8 / 11.2

= 7.92 parts of hydrogen

For Phosphorus tetra oxide

= 56.4 / 43.6

= 1.29 parts

Thus, According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

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It is false that when two water molecules are near each other, a hydrogen bond will form between the more positive and the more negative atoms.

A water particle is composed of two hydrogen atoms and one oxygen atom.

When there are two water particles close a bond is formed between the hydrogen atom of one particle and the oxygen atom of a neighbor water particle, which means there is a hydrogen-oxygen bond rather than a hydrogen-hydrogen bond.

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It is True that when two water molecules are near each other, a hydrogen bond will form between the more positive hydrogen atom of one molecule and the more negative oxygen atom of the neighboring molecule.

A water molecule is made up of two hydrogen atoms bonded to an oxygen atom, and its overall structure is bent. This is because the oxygen atom, forms a bond with hydrogen atoms. It also carries two pairs of unshared electrons. All of the electron pairs (shared and unshared) repel each other.

Hydrogen bond will form between the more positive and the more negative atoms of neighboring water molecules when two water molecules are near each other. This is due to the polar nature of water molecules, which have a slightly positive charge on the hydrogen atoms and a slightly negative charge on the oxygen atoms. These hydrogen bonds give water many of its unique properties, such as its high surface tension and high heat of vaporization.

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Rutherford's results declined the results of Thomson's model, the correct option is C.

Atomic Models are the scientific theories proposed to determine the structure of an atom.

There are mainly 5 theories proposed for atomic models.

1. John Dalton's Atomic Model: An atom is the basic building block of all physical entities in the universe.

2. Plum Pudding Model, created by J.J. Thomson, uses the comparison of plum pudding, where the positive charge is uniformly dispersed throughout and the negative charge is randomly sprinkled on top, to explain how subatomic particles are structured.

3. Rutherford's model: proved the presence of a nucleus.

4.Niel Bohr's model: Arrangement of electrons in shells.

5. Erwin Schrodinger's model is also called as Quantum Model.

In J.J. Thomson's model, the equal distribution of positive and negative charges is proposed while,

Rutherford's theory declines this arrangement and proposes that the positively charged nucleus occupies a very small part and there is empty space in the atom.

So, Rutherford’s results suggested that the model proposed by Thomson was based on false research and required.

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Answer:

The most straightforward definition is that an acid is a molecular compound that contains one or more hydrogen atoms and produces hydrogen ions (H+) when dissolved in water.

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

The mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur .

The molecular formula of Aluminum Sulfate is \(Al_2(SO_4)_3.\) In one molecule of aluminum sulfate, there are 3 sulfur atoms. To calculate the mass of aluminum sulfate, follow the steps below:

Step 1: Calculate the molar mass of aluminum sulfate using the periodic table.Al = 27.0 g/molS = 32.1 g/molO = 16.0 g/mol

(2 × Al) + (3 × S) + (12 × O) = molar mass of \(Al_2(SO_4)_3.\) = 342.2 g/mol

Step 2: Find the number of moles of sulfur in the given number of atoms of sulfur.2\(2.837*10^{26\) atoms of sulfur × 1 mol S/\(6.022 * 10^{23\)atoms S = 0.0470 mol S

Step 3: Use the molar ratio of sulfur to aluminum sulfate to calculate the number of moles of aluminum sulfate.1 mol \(Al_2(SO_4)_3.\) / 3 mol S = 0.333 mol\(Al_2(SO_4)_3.\) per mol S0.0470 mol S × 0.333 mol \(Al_2(SO_4)_3.\)/mol S = 0.0157 mol \(Al_2(SO_4)_3.\)

Step 4: Calculate the mass of aluminum sulfate.0.0157 mol \(Al_2(SO_4)_3.\) × 342.2 g/mol\(Al_2(SO_4)_3.\)= 5.373 g\(Al_2(SO_4)_3.\)

Therefore, the mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur.

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Answer:

(D.)

The core of the pyruvate dehydrogenase complex is made up of eight catalytic trimers that make up the E2 component.

Explanation:

Eight trimers assemble as a hollow truncated cube, which forms the core of the multi-enzyme complex, known as the E2 complex in human pyruvate dehydrogenase complex.

Answer:

1. Barium Acetate.

2. Formula: Ba(C2H3O2)2.

3. Molar Mass: 255.415.

Explanation:

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:

20.0

Explanation:

NaOH = (25.0) (0.100m) \ 0.125M = 20.0mL

Answer:

Neutral

Explanation:

A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic. The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.

Answer:

I believe it is neutral.

Explanation:

Since higher than 7 pH is alkaline, and lower than 7 pH is acidic.

Answer

1.06 mol

Explanation

A beaker contains 0.53 mol of potassium bromide in 648.9 mL of water

An additional 648.9 mL of water is added implies the volume of the water will become (648+648)mL = 1297.8 mL

Therefore, the number of moles of potassium bromide in 1297.8 mL will be:

Due to the trend of boiling points, the optimal order for elements within a group going from top to bottom is \(A, X_o, Z_w\).

From the given information we can see that the boiling points of the elements decrease from A to Xo to Zw. The highest boiling point (350°C) is of element A, followed by Xo (215°C) and Zw (285°C). We arrange the components in decreasing order of boiling points to get A, Xo and Zw.

It is important to remember that in this situation, the alphabetical order of the elements and their atomic weights are irrelevant considerations. A reasonable basis for arranging the components within the system is provided by the trend in boiling points.

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Answer:

will be 9.7 Liters

Explanation:

Answer:

is has around 1/5 lyrics of water

Answer:

\(1 \: mole \: = \: 6.02 \times {10}^{23} \: molecules \\ 0.350 \: moles \: = \: (0.350 \times 6.02 \times {10}^{23} ) \: molecules \\ = 2.107 \times {10}^{23} \: molecules\)

Answer:

D

Explanation:

Friction plays an important part in many everyday processes. For instance, when two objects rub together, friction causes some of the energy of motion to be converted into heat.

Mg(s) + 2H⁺ → Mg²⁺(aq) + H₂.To obtain the overall reaction, we sum the two half-reactions and omit the similar species in the reactants and products sides.We have two reactions: oxidation reaction:Mg(s) → Mg²⁺(aq) + 2e.Reduction reaction:2H⁺ + 2e → H₂. So, we add the two half-reactios and obtain the overall reaction:Mg(s) + 2H⁺ → Mg²⁺(aq) + H₂.

A chemical equation's generic form is:Products Reactants.In a chemical equation, the reactants are the materials that are present before the reaction begins, and the byproducts are indeed the chemicals that are created during the reaction.

The chemical reaction rate is calculated by dividing the change that occurs in a reactant's or product's concentration by the coefficient from the equation's balanced state.

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Answer:

Explanation:

Answer:

By measuring through scale

Explanation:

CAN YOU TELL THE NAME OF COUNTRY BECAUSE I AM FROM NEPAL

Answer:

Explanation:

1 mol of sodium = 23 grams (use the number on your periodic table).

0.7350 mol sodium = x

Cross multiply

1*x = 0.7350 * 23

x = 16.905

You will get slightly less than this, depending on your periodic table. But the method will be the same.

Answer:

partB: n=2N205

partc:17.20

There are 2.64 × 1022 molecules of sucrose present in this serving of fruit dessert containing 15.0 g of sugar.

To determine the number of molecules of sugar present in the serving, we need to calculate the number of moles of sugar and then convert it to the number of molecules.

Given:

Mass of sugar (sucrose) = 15.0 g

Molar mass of sucrose (C12H22O11) = 342 g/mol

First, calculate the number of moles of sugar using the formula:

Number of moles = Mass of substance / Molar mass

Number of moles of sugar = 15.0 g / 342 g/mol ≈ 0.0439 mol

Next, we use Avogadro's number, which states that there are approximately 6.022 × 10^23 molecules in one mole of a substance. Therefore, to find the number of molecules of sugar:

Number of molecules = Number of moles × Avogadro's number

Number of molecules of sugar = 0.0439 mol × 6.022 × 10^23 molecules/mol ≈ 2.64 × 10^22 molecules

Therefore, there are approximately 2.64 × 10^22 molecules of sugar present in this serving.

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The correct conversion factor when converting from moles to liters is the molar volume at a given temperature and pressure.

This value is dependent on the ideal gas law and can be determined using the ideal gas equation PV = nRT, where P represents pressure, V represents volume, n represents the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

The molar volume of an ideal gas at standard temperature and pressure (STP), which is 0 degrees Celsius (273.15 Kelvin) and 1 atmosphere (101.3 kilopascals), is approximately 22.4 liters per mole.

Therefore, to convert moles to liters, you can multiply the number of moles by the molar volume at STP, which gives you the volume in liters.

It's important to note that the molar volume is an approximation and assumes ideal gas behavior.

Additionally, if you are working with gases at different temperatures and pressures, you would need to use the appropriate molar volume value corresponding to the given conditions.

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Answer:

Here are six materials that are good insulators to keep ice from melting for at least twenty minutes:

Styrofoam: This material is often used to make insulated coolers because of its low thermal conductivity, which makes it an excellent insulator.

Fiberglass: This material is often used in insulation for walls and attics because it traps air and reduces heat transfer.

Polyurethane foam: This material is used to insulate refrigerators and freezers because of its excellent thermal insulation properties.

Cellulose insulation: This is a type of insulation made from recycled materials that provides good thermal insulation.

Mineral wool: This is a type of insulation made from natural rock materials that provides good thermal insulation and fire resistance.

Aerogel: This is a highly effective insulator made from a gel-like substance that has been dried to create a material that is more than 95% air. It is often used in scientific applications where extreme temperature control is required.