How many molecules are in a 22.8 gram sample of Methane?

-Please explain how to solve it and show work

Answer:

its sodium hydroxide

Explanation:

Answer:

Mineral deficiencies can lead to a variety of health problems, such as weak bones, fatigue, or a decreased immune system.

Explanation:

There are five main categories of mineral deficiency: calcium, iron, magnesium, potassium, and zinc.

One major cause of mineral deficiency is simply not getting enough essential minerals from food or supplements.

Answer:

it can lead to a variety of health problems, such as weak bones, or a decreased immune system.

Explanation:

Answer:

The trait of the other cactus stopped it from being able to reproduce and survive.

The volume of O₂ produced when 8.52 g of Na₂O₂ is added to excess water is approximately 1.17 liters at STP.

When it comes to the ideal gas law, the underlying assumption is that the gas is in a state of thermodynamic equilibrium. This means that its molecules are not interacting with each other except through perfectly elastic collisions.

Equation:

We can use stoichiometry to determine the volume of oxygen gas produced from the reaction of 8.52 g of Na₂O₂.

First, we need to convert the mass of Na₂O₂ to moles using its molar mass:

8.52 g Na₂O₂ × (1 mol Na₂O₂ / 77.98 g Na₂O₂) = 0.1093 mol Na₂O₂

According to the balanced chemical equation, 1 mole of Na₂O₂ produces 1/2 mole of O₂:

2 Na₂O₂ + 2 H₂O → 4 NaOH + O₂

1 mol Na₂O₂ produces 1/2 mol O₂

So, the number of moles of O₂ produced is:

0.1093 mol Na₂O₂ × (1/2 mol O₂ / 1 mol Na₂O₂) = 0.05465 mol O₂

Finally, we can use the ideal gas law to determine the volume of O₂ produced at standard temperature and pressure (STP), which is defined as 0°C (273 K) and 1 atmosphere (1 atm) of pressure:

PV = nRT

At STP, the pressure and temperature are known, so we can rearrange the equation to solve for V:

V = nRT / P

Plugging the values, we get:

V = (0.05465 mol) × (0.08206 L atm mol⁻¹ K⁻¹) × (273 K) / (1 atm)

V ≈ 1.17 L

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Answer:

600 mL

Explanation:

From the question given above, the following data were obtained:

Initial concentration (C₁) = 6 M

Initial volume (V₁) = 50 mL

Final concentration (C₂) = 0.5 M

Final volume (V₂) =?

Using the dilution formula (i.e C₁V₁ = C₂V₂) we can obtain the final volume as illustrated below:

C₁V₁ = C₂V₂

6 × 50 = 0.5 × V₂

300 = 0.5 × V₂

Divide both side by 0.5

V₂ = 300 / 0.5

V₂ = 600 mL

Thus, the final volume is 600 mL

The mass of 6.005 g of carbon contains approximately 3.011 x 10²³ carbon atoms.

We are aware that a mole is a grouping of 6.022 10²³ atoms. 6.0221023 carbon atoms make up a mole of carbon. As a result, we can estimate that 6.0221023 carbon atoms have a mass of 12 grammes.

There are: atoms of carbon in the sample.

The amount of carbon atoms in the sample may be determined using Avogadro's number (6.022 x 10²³ atoms per mole) and the molar mass of carbon (12.010 g/mol)

Number of moles of carbon = mass of carbon/molar mass of carbon

= 6.005 g / 12.010 g/mol

= 0.500 mol

Number of carbon atoms=number of moles of carbon x Avogadro's number

= 0.500 mol x 6.022 x 10²³ atoms/mol

= 3.011 x 10²³ atoms

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Since each element in the reactant and product has the same amount of atoms.

Subatomic particles and electrons are the 2 types of fundamental particles that make up an atom. An atom's nucleus is encircled by an area of electrons. The electrical charge of every electron is negative one. Protons and neutrons, which together make up an atom's nucleus, are made of quarks.

The Pauli exclusions principle states that two atoms cannot contact at room temperature if "trying to touch" is understood to mean that they are in the exact same place. The Pauli exclusions principle prevents the body's atoms from merging into a single location.

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The percent yield is 86.1%.

The percent yield is a measure of the efficiency of a chemical reaction and is calculated by comparing the actual yield of a reaction to the theoretical yield that could be obtained based on stoichiometry. The percent yield is expressed as a percentage and is calculated using the following formula:

Percent yield = (Actual yield ÷ Theoretical yield) x 100%

We can see;

Number of moles of octane = 3.05 * 10^1/114 g/mol

= 0.27 moles

Then  from the reaction equation;

2 moles of octane produces 16 moles of CO2

0.27 moles of octane would produce 0.27 * 16/2

= 2.16 moles

Theoretical yield of the product =  2.16 moles * 44 g/mol

= 95 g

Thus we have that;

% yield = 8.179 * 10^1 g/95 g * 100/1

= 86.1%

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Answer:

Glaciers

Explanation:

Reservoirs refers to paces where water are stored. The largest water reservoir on earth are the oceans which contain about 97% of all the water on the earth.

The next highest  reservoir  are the glaciers or the polar ice caps. These hold quite an enormous amount of the water found on earth.

Surface and other fresh water only account for about 1.2% of all the surface water on earth.Ground water accounts for a very minute percentage of the water found on earth.

Answer:

Explanation:

a )

CH₃CH₂CH₂CH₂CH₂Br + KOH   ⇒ CH₃CH₂CH₂CH₂CH₂OH

CH₃CH₂CH₂CH₂CH₂OH  + acidic potassium dichromate ⇒  CH₃CH₂CH₂CH₂COOH

b )

CH₃CH₂CH₂CH₂CH₂Br + KCN ⇒ CH₃CH₂CH₂CH₂CH₂CN  Hydrolysis ⇒ CH₃CH₂CH₂CH₂CH₂COOH .

c )

CH₃CH₂CH₂CH₂CH₂Br + KOH   ⇒ CH₃CH₂CH₂CH₂CH₂OH

CH₃CH₂CH₂CH₂CH₂OH  + acidic potassium dichromate ⇒  CH₃CH₂CH₂CH₂COOH + SOCl₂ ( thionyl  chloride ) ⇒ CH₃CH₂CH₂CH₂COCl

d )

CH₃CH₂CH₂CH₂CH₂Br + KCN ⇒ CH₃CH₂CH₂CH₂CH₂CN  Hydrolysis ⇒ CH₃CH₂CH₂CH₂CH₂COOH + PCC ( NH₃ ) ⇒ CH₃CH₂CH₂CH₂CH₂CONH₂

e )

CH₃CH₂CH₂CH₂CH₂Br + KCN ⇒ CH₃CH₂CH₂CH₂CH₂CN  Hydrolysis ⇒ CH₃CH₂CH₂CH₂CH₂COOH + C₂H₅OH ( Ethyl alcohol + H⁺ )⇒  

CH₃CH₂CH₂CH₂CH₂COOC₂H₅ ( ethyl hexanoate )

The net momentum if North is the positive direction is 20,000Kgm/s.

Momentum can simply be defined as the product of the mass of a particle and its velocity.

Momentum is a vector quantity that possesses a magnitude and a direction.

The Formula of momentum is given below:

Momentum, p = m * v

where;

m is the mass and v is the velocity of the body.

S.I. unit of momentum is kgm/s.

We have the given data as follows:

m1 = 500 kg

v1 = 30 m/s

m2 = 200 kg

v2= 25 m/s

Momentum = m1v1 + m2v2

= (500 * 30) + (200 * 25)

= 15000 + 5000

= 20,000 kgm/s

Momentum = 20,000Kgm/s.

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Answer:

B - O

Explanation:

Carbon - 170 pm

Oxygen - 60 pm

Beryllium - 112 pm

The number of  atoms that are in 1.50 mol of carbon-12 is 18g.

1 mol of any substance contains 6.022×1023 atoms/molecules

So 1.50 moles of carbon  will have 1.50×6.022×1023 atom = 9.0×1023 atoms

Now,  number of moles = weight g /molar mass gmol-1

1.5= weight g/ 12 gmol-1.

So weight = 1.5 mol×12gmol-1 = 18 g

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Answer:

Explanation:

A tertiary alcohol is a compound (an alcohol) in which the carbon atom that has the hydroxyl group (-OH) is also bonded (saturated) to three different carbon atoms.

Based on the question, the only tertiary alcohol that can result from C₆H₁₄O that have a 4-carbon chain is

2-hydroxy-2,3-dimethylbutane

     H  OH   H    H

      |     |       |      |

H - C - C -   C  - C - H

      |     |       |      |

     H  CH₃  CH₃ H

From the above, we can see that the carbon atom having the hydroxyl group is also bonded to three other carbon atoms. And since we aren't considering stereochemistry, this is the only tertiary alcohol we can have with a 4-carbon chain

The three obstacles that Mendeleev faced in his life are as follows:

Dmitri Mendeleev was a fascinating Russian teacher and scientist. He is often considered the father of the modern periodic table. This is because his contribution to the arrangement of chemical elements in the periodic table was unexceptional.

Therefore, the three obstacles that Mendeleev faced in his life are well described above.

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This element is in group 1.

According to the octet rule, this element would be expected to form an ion with a charge of +1.

If X is in period 5, the ion formed has the same electron configuration as the noble gas Krypton

The symbol for the ion is Rb⁺

Electronic configuration refers to the arrangement of electrons in the orbitals of an atom or molecule, indicating the energy level of the electrons, the number of electrons in each energy level, and the number of electrons in each orbital.

Considering the given element:

It has one valence electron, hence it is in group 1. Group 1 elements form ions with a charge of +1.

Losing one electron will give the ion the same electron configuration as Kyrton since it is the noble gas in Period 4.

The element is rubidium and the ion is Rb⁺.

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Answer:

D. 76%

Explanation:

Percent yield=actual/theoretical * 100

38/50 * 100 = 76%

the coefficient in front of H2O and so that you have an even number of oxygen

to balance H2O = H2 + O2 you will need to be sure to count all of H and O atoms on each side of the chemical

Answer:

The answer is option D

Explanation:

This is because Mrs. Linde resolves the conflict by committing to a new life with Krogstad, which develops the theme that new beginnings are always possible.

The conflict in this passage develops a theme, as Mrs. Linde resolves the conflict by committing to a new life with Krogstad, which develops the theme that new beginnings are always possible. Option D.

A conflict is defined as a battle or disagreement. A dispute over parenting techniques is an example of conflict, the two parties not seeing eye to eye.

In conclusion, The passages conflict develops the theme that new beginnings are always possible.

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Answer:

The correct answer is - ascending order of atomic numbers in period and similar characters in groups.

Explanation:

The modern periodic table is arranged in periods and groups. In periods the arrangement of the elements are on the basis of the increasing order of atomic numbers.

In groups of the periodic table, elements are arranged on the basis of the similar characters of the elements and number of electrons in outer shell of the elements. The elements in the Modern Periodic Table are arranged in 7 Periods and 18 Groups.

Thus, the correct answer is - ascending order of atomic numbers in period and similar characters in groups.

Answer:

Work is a force causing the movement or displacement of an object

law of conservation mass:

1. Atoms cannot be created or destroyed in a chemical reaction.

2. Molecules cannot be created or destroyed in a chemical reaction.

3. Compounds cannot be created or destroyed in a chemical reaction.

4. Heat cannot be created or destroyed in a chemical reaction.

The number of chlorine moles present in the vessel are 37.67 mol.

What are moles?

Moles are the number of substances present in a system which consists of entities like ions, atoms, or molecules as much as atoms in the weight of pure carbon which is 12 grams. It is the SI unit of amount of substance.

One mole of a substance is equal to the Avogadro Number which is equal to 6.022×10²³.

According to Ideal gas law,

PV=nRT where,

P= Pressure

V= Volume

n= number of moles

R= Ideal gas constant

T= temperature (in Kelvin)

n= PV/RT

⇒33.3×36.5/0.0821×393

⇒1215.45/32.2653

⇒37.670

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Identifying the two compounds present in an unknown mixed sample can be a challenging task, but a combination of these techniques can help to narrow down the possibilities and eventually identify the compounds.

Here are some possible approaches:

Analyze the physical and chemical properties of the unknown sample, such as melting point, boiling point, solubility, reactivity with certain chemicals, and spectroscopic data (e.g., IR, NMR, UV-Vis). Compare these properties to those of known compounds and see which ones match.

Use various separation techniques to isolate each individual component of the mixture, such as extraction, distillation, chromatography, and crystallization. Then, analyze each isolated component using various analytical techniques to determine its identity.

Use chemical tests and reactions to identify the functional groups or chemical characteristics of the unknown sample. For example, if the sample contains a carbonyl group, it can be tested with 2,4-dinitrophenylhydrazine to form a characteristic orange precipitate.

Overall, identifying the two compounds present in an unknown mixed sample can be a challenging task, but a combination of these techniques can help to narrow down the possibilities and eventually identify the compounds.

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Answer: F, K, Ba, Cr

Answer:  C

Explanation:

Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei.