How many moles of neon occupy a volume of 14.3 l at stp? how many moles of neon occupy a volume of 14.3 l at stp? 1.57 moles 0.638 moles 36.7 moles 32.0 moles 6.45 moles?

Answer:

A group of atoms bonded to carbon that determines how the molecule will react

Explanation:

Functional groups are atom or groups of atom attached to the organic compound in a specific manner.

Some of the examples of functional groups are:

-COOH, -Cl, -OH, -NO2, -COCl, -C=O, etc.

Functional groups determines the characteristics chemical properties of a organic compound.

The different organic compounds having same functional group undergoes same or similar type of reaction.

The bond angle in a tetrahedral molecule is ideally 109.5° but can be slightly smaller in molecules like water and ammonia due to the presence of lone pairs of electrons.

The bond angle in a tetrahedral molecule is 109.5°. However, it can differ slightly due to the effects of repulsion between atoms or if lone pairs of electrons are involved. For instance, in water, which has a tetrahedral structure, the angle is 104.5° due to the two lone pairs of electrons on the oxygen atom.

These lone pairs occupy more space, causing the bond angle to be slightly less than the ideal. Similarly, ammonia has a bond angle of 107.3° due to its one lone pair. Thus, while the ideal bond angle in a tetrahedral molecule is 109.5°, the presence of lone pairs can cause the angle to be slightly smaller.

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Answer :  The volume of ammonia gas at STP is, 67.2 liters

Explanation : Given,

Mass of ammonia = 51.0 g

Molar mass of ammonia = 17 g/mole

As we know that,

At STP, 1 mole of gas contains 22.4 L volume of gas.

First we have to calculate the moles of ammonia gas.

[tex]\text{Moles of }NH_3=\frac{\text{Mass of }NH_3}{\text{Molar mass of }NH_3}=\frac{51.0g}{17g/mole}=3mole[/tex]

Now we have to calculate the volume of ammonia gas at STP.

As, 1 mole of ammonia gas contains 22.4 L volume of ammonia gas

So, 3 moles of ammonia gas contains [tex]3\times 22.4L=67.2L[/tex] volume of ammonia gas

Therefore, the volume of ammonia gas at STP is, 67.2 liters

Stoichiometry relates moles of rectant to moles of product

How does the law of conservation of mass apply  to this reaction: C2H4 + O2 → H2O + CO2?

Answer : The volume of [tex]Pb(NO_3)_2[/tex] needed are, 4.6875 ml

Explanation :

First we have to calculate the moles of [tex]KI[/tex].

[tex]\text{Moles of }KI=\text{Molarity of }KI\times \text{Volume of solution}=0.105mole/L\times 0.01L=0.00105mole[/tex]

Now we have to calculate the moles of [tex]Pb(NO_3)_2[/tex]

The given balanced chemical reaction is,

[tex]Pb(NO_3)_2(aq)+2KI(aq)\rightarrow 2KNO_3(aq)+PbI_2[/tex]

From the balanced chemical reaction, we conclude that

As, 2 moles of KI react with 1 mole of [tex]Pb(NO_3)_2[/tex]

So, 0.00105 moles of KI react with [tex]\frac{0.00105}{2}=0.000525[/tex] mole of [tex]Pb(NO_3)_2[/tex]

Now we have to calculate the volume of [tex]Pb(NO_3)_2[/tex]

[tex]\text{Volume of }Pb(NO_3)_2=\frac{\text{Moles of }Pb(NO_3)_2}{\text{Molarity of }Pb(NO_3)_2}[/tex]

[tex]\text{Volume of }Pb(NO_3)_2=\frac{0.000525mole}{0.112mole/L}=4.6875\times 10^{-3}L=4.6875ml[/tex]

conversion used : (1 L = 1000 ml)

Therefore, the volume of [tex]Pb(NO_3)_2[/tex] needed are, 4.6875 ml

Answer:

the naswer is gravity pulling on the ball

Explanation:

The molecular mass of the gas is approximately 80.15 g/mol.

To calculate the molecular mass of the gas, we first need to determine the number of moles of the gas. We can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

At STP (standard temperature and pressure), the pressure is 1 atm and the temperature is 273 K.

The volume of the gas is given as 15.0 L. We can rearrange the equation to solve for n, the number of moles:

n = PV / RT.

Substituting the given values, we have:

n = (1 atm) * (15.0 L) / (0.0821 L·atm/mol·K * 273 K).

Calculating this gives us n

= 0.6926 mol.

To calculate the molecular mass, we can divide the mass of the gas sample (55.50 g) by the number of moles (0.6926 mol).

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All animals want to survive. With this in mind, lets talk about some natural drugs that your body creates to create this feeling of "love".

P.E.A. is a natural anti-depressant that the body makes, kind of like dopamine. This is the most affiliated with the nickname "love drug". It creates the need to reproduce sexually. This is the primal instinct; to reproduce and pass on your genetic material.

Now, as you stay with one partner, you may find that the feeling changes a bit; this is P.E.A. turning into oxytocin. This is a deeper kind of love that humans develop once they have been with a partner for long enough. High levels of oxytocin are found when a mother has a child, usually found during breastfeeding.

There are many natural drugs that your body produces to create the feeling of love. If you have any questions, let me know! Hope this helps!

Water molecules are held together by an electromagnetic force known as hydrogen bonds. These bonds are a strong type of dipole-dipole interaction due to the partial positive charge of hydrogen atoms and partial negative charge of oxygen atoms. Option D is correct.

The electromagnetic force is responsible for keeping water molecules attracted to one another. More specifically, this attraction is due to hydrogen bonds, which are a strong type of intermolecular force. These bonds form because of the dipole interaction where the slightly positively charged hydrogen atoms of one water molecule are attracted to the slightly negatively charged oxygen atoms of another. Although individual hydrogen bonds are weaker than covalent and ionic bonds within molecules, they occur in large numbers in water, resulting in a significant force that holds the water molecules together.

Hydrogen bonds are particularly strong compared to other dipole-dipole interactions because of water's highly polar nature. This polarity is due to the oxygen atom in water being highly electronegative and possessing two lone pairs of electrons, resulting in a partial negative charge while the hydrogen atoms have a partial positive charge.

Hence, D. is the correct option.

The complete question is:

Water molecules are made of slightly positively charged hydrogen atoms and slightly negatively charged oxygen atoms. Which force keeps water molecules stuck to one another?

A.) Strong Nuclear

B.) Gravitational

C.) Weak Nuclear

D.) Electromagnetic

Answer is Carbon dioxide.

The given gases are trace gases. Our atmosphere has 0.1% of trace gases. Among those trace gases, carbon dioxide level is highest as 93.49%. Methane has 0.44% and amount of nitrous oxide is 0.07%. But when considering the whole atmosphere nitrogen gas is the most abundant gas as 78% and next is oxygen as 21%.

Carbon dioxide is the most abundant of the three gases mentioned in the Earth's atmosphere. Nitrogen and oxygen are the most abundant gases overall. Methane is more effective on a per-molecule basis at heating the atmosphere than carbon dioxide.

The question involves identifying which of the three gases carbon dioxide ([tex]CO_2[/tex]), nitrous oxide ([tex]N_2O[/tex]), or methane ([tex]CH_4[/tex]) is most abundant in the Earth's atmosphere. When considering these gases specifically, carbon dioxide is the most abundant. However, it is important to note that the major components of the atmosphere are nitrogen (78.1%) and oxygen (20.9%), with gases such as argon, carbon dioxide, neon, helium, methane, and nitrous oxide present in much smaller amounts.

Regarding the effectiveness at heating the atmosphere, methane is more effective on a per-molecule basis than carbon dioxide due to its ability to absorb more heat. However, carbon dioxide is more abundant and also contributes significantly to the atmospheric warming, playing a crucial role in the Earth's greenhouse effect beside water vapor, the most abundant greenhouse gas.

In the Bronsted-Lowry model of acids and bases, an acid is a hydrogen donor and a base is a hydrogen acceptor.

Bronsted-Lowry acid is any substance that donates a proton or hydrogen ion while a Brønsted-Lowry base is that which accepts an hydrogen ion.

Based on this definition, it can be said that a Brønsted-Lowry acid must possess hydrogen ion(s) to donate.

Examples of Brønsted-Lowry acid are as follows:

Therefore, in the Bronsted-Lowry model of acids and bases, an acid is a hydrogen donor and a base is a hydrogen acceptor.

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Answer:

The right option is; b. the water caused an increase in temperature of the air inside the ball and an increase in pressure.

The dent (hollow area formed by pressing or hitting) from the ping-pong ball disappeared because energy was transferred from the hot boiling water in which the ball was placed to the air inside the ball. This transferred energy will increase the temperature of the air inside the ball and the air molecules will begin to move faster with a greater force. Hence, causing an increase in pressure.

Explanation:

An Arrhenius base is a substance that dissociates in water to form hydroxide ions (OH⁻). 
For example lithium hydroxide is an Arrhenius base:

LiOH(aq) → Li⁺(aq) + OH⁻(aq).

Answer:

more H+ ions

Explanation:

Answer:

30%

Explanation:

Final answer:

The atomic radius of a copper atom in a face-centered cubic lattice with an edge length of 351 pm is approximately 123.675 pm.

Explanation:

Calculating the Atomic Radius in a Face-Centered Cubic Lattice

For copper, which crystallizes in a face-centered cubic (FCC) lattice structure, we can calculate the atomic radius if we know the edge length of its unit cell. Given that the edge of the FCC unit cell is 351 pm, we can use the fact that the diagonal across the faces of the cube (√2 times the edge length) is equal to four times the atomic radius in an FCC lattice. This is because in an FCC structure, atoms touch along the face diagonal.

To calculate the atomic radius, we use the formula:

4r = √2 × edge length

Therefore: r = (√2 × 351 pm) / 4

r ≈ (1.414 × 351 pm) / 4

r ≈ 494.7 pm / 4

r ≈ 123.675 pm

The approximate radius of a copper atom in an FCC lattice is 123.675 pm.

Answer is: boiling point will be changed by 4°C.

Chemical dissociation of aluminium nitrate in water: Al(NO₃)₃ → Al³⁺(aq) + 3NO⁻(aq).

Change in boiling point: ΔT =i · Kb · b.

Kb - molal boiling point elevation constant of water is 0.512°C/m, this the same for both solution.

b -  molality, moles of solute per kilogram of solvent., this is also same for both solution, because ther is same amount of substance.

i - Van't Hoff factor.

Van't Hoff factor for sugar solution is 1, because sugar do not dissociate on ions.

Van't Hoff factor for aluminium nitrate solution is approximately 4, because it dissociates on four ions (one aluminium cation and three nitrate anions). So ΔT is four times bigger.

The answer should be 4°C....

Sunspots appear dark because they are cooler than the surrounding areas of the sun's surface. The cooler temperature causes less light to be emitted, making the sunspots look dark.

Sunspots appear dark because they are cooler than the surrounding areas of the sun's surface, also known as the photosphere. While they are still very hot, sunspots have temperatures of about 3,000 to 4,500 Kelvin, which is cooler than the average temperature of the photosphere, which is about 5,500 Kelvin. This difference in temperature causes less light to be emitted, and therefore the sunspots appear dark compared to the rest of the sun's surface

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To find the mass of argon gas at 4.3 liters, 70 kPa, and 20 °C, use the ideal gas law, convert units to atm and Kelvin, solve for moles, and then multiply by the molar mass of argon to obtain the mass, which is approximately 4.07 grams.

The question asks for the mass of argon gas that occupies a volume of 4.3 liters at a pressure of 70 kPa and a temperature of 20 °C. To answer this, we can use the ideal gas law equation, 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 convert the given temperature to Kelvin:

Next, we need to convert the pressure from kPa to atm, since the ideal gas constant (R) is typically given in L·atm/(mol·K):

We can then rearrange the ideal gas law to solve for the number of moles (n):

Using the values and R = 0.0821 L·atm/(mol·K), we calculate n:

Finally, using the molar mass of argon, which is about 39.948 g/mol, we find the mass:

Therefore, the mass of argon that occupies a volume of 4.3 liters at 70 kPa and 20 °C is approximately 4.07 grams.

Elements combine in different ways to form compounds through chemical reactions, where bonds are formed holding the atoms together. The ratio of atoms in a compound is always a fixed, small, whole number, as per Dalton's atomic theory. Examples include water (H2O) and table salt (NaCl).

Elements combine in different ways to produce compounds through a chemical reaction, which results in the formation of chemical bonds. For general reference, a compound is formed when two or more elements chemically combine, exhibiting definite chemical and physical properties distinct from its independent elements. Chemical bonds, namely ionic or covalent, hold the atoms together in a compound.

Take water as an example, it is a compound formed when two hydrogen atoms react with one oxygen atom, creating a molecule of water (H2O). In this compound, the ratio of hydrogen to oxygen atoms is 2:1, thus, presenting a clear demonstration of how elements combine in various ratios to create compounds with unique properties.

Another example can be the combination of sodium and chlorine to form table salt (NaCl). Here, one atom of sodium combines with one atom of chlorine. These examples manifest Dalton's atomic theory which elucidates that atoms of different elements can combine in fixed, small, whole-number ratios to form compounds.

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The way elements combine to produce compounds is best explained by chemical reactivity. Therefore, the correct answer is option a. chemical reactivity.

To understand which option best explains how elements combine in different ways to produce compounds, let’s look at each choice:

Therefore, chemical reactivity, best explains how elements combine in different ways to produce compounds. This is because elements combine based on their electron configurations and how their atoms interact to form stable molecules.

complete question.

Which best explains how elements combine in different ways to produce compounds?

a. chemical reactivity

b. state of matter

c. similar physical properties

d. matching atomic numbers

Final answer:

By assigning oxidation numbers, it is determined that Sr and O in H₂O are oxidized, while S in SO₃ and Kr are reduced in the given reactions. This identifies the substances undergoing oxidation and reduction.

Explanation:

To identify what is being oxidized and what is being reduced in each redox reaction, we first assign oxidation numbers to each atom in the reaction. The element whose oxidation number increases is oxidized, acting as the reducing agent. Conversely, the element whose oxidation number decreases is reduced, acting as the oxidizing agent.

By tracking these changes in oxidation numbers, we can easily determine which substances are oxidized and which are reduced in these reactions. Remember, the oxidized substance loses electrons, and the reduced one gains electrons, according to the concept of redox reactions.