the density of an unknown gas is 2.00 grams per liter at 3.00 atmosphere pressure and 127oc. what is the molar mass of this gas?

..............

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The word equations into formula equations can be written as .\(3Zn+N_{2}\to Zn_{3}N_{2}\)

The formula is a fact or a rule written with mathematical symbols.

It is the symbolic representation of a chemical equation.

Symbol for zinc is Zn and that for nitrogen gas is N₂.

In general, \(Zn+N_{2}\to Zn_{3}N_{2}\) is the formula equation of

zinc + nitrogen → zinc nitride.

Now, the balanced chemical equation for the given condition can be written as,

\(3Zn+N_{2}\to Zn_{3}N_{2}\)

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The pH of the buffer solution containing 0.225 M acetic acid and 0.375 M sodium acetate is approximately 4.96 and after the addition of 10.0 ml of 0.318 M NaOH to the 100.0 ml buffer solution, the pH is approximately 4.90.

To calculate the pH of a buffer solution containing acetic acid (CH3COOH) and sodium acetate (CH3COONa), we need to consider the equilibrium between the weak acid and its conjugate base. The dissociation of acetic acid can be represented by the equation:

CH3COOH ⇌ CH3COO- + H+

The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation:

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

where pKa is the negative logarithm of the acid dissociation constant (Ka), [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

In this case, acetic acid is a weak acid with a pKa of 4.74. The given concentrations are 0.225 M for acetic acid ([HA]) and 0.375 M for sodium acetate ([A-]). Plugging these values into the Henderson-Hasselbalch equation, we can calculate the pH of the buffer solution.

pH = 4.74 + log (0.375/0.225)

pH = 4.74 + log (1.67)

pH ≈ 4.74 + 0.221

pH ≈ 4.96

Therefore, the pH of the buffer solution containing 0.225 M acetic acid and 0.375 M sodium acetate is approximately 4.96.

In the second part of the question, we need to determine the pH of the buffer solution after adding 10.0 ml of 0.318 M NaOH to 100.0 ml of the buffer. Since NaOH is a strong base, it will react with the weak acid (acetic acid) in the buffer to form the conjugate base (acetate ion) and water. This reaction consumes the weak acid and shifts the equilibrium towards the conjugate base.

To calculate the new pH, we need to consider the change in concentration of the weak acid and the conjugate base. From the given volumes and concentrations, we can determine the moles of acetic acid and acetate ion:

Moles of acetic acid = 0.225 M × 0.100 L = 0.0225 mol

Moles of acetate ion = 0.375 M × 0.100 L = 0.0375 mol

After the addition of 10.0 ml (0.010 L) of 0.318 M NaOH, we can calculate the new concentrations:

New concentration of acetic acid = (0.0225 mol - 0.010 L × 0.318 mol/L) / (0.100 L + 0.010 L) = 0.195 M

New concentration of acetate ion = (0.0375 mol + 0.010 L × 0.318 mol/L) / (0.100 L + 0.010 L) = 0.285 M

Using the Henderson-Hasselbalch equation with the new concentrations, we can calculate the new pH:

pH = 4.74 + log (0.285/0.195)

pH = 4.74 + log (1.46)

pH ≈ 4.74 + 0.164

pH ≈ 4.90

Therefore, after the addition of 10.0 ml of 0.318 M NaOH to the 100.0 ml buffer solution, the pH is approximately 4.90.

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Answer:

A.) 12

Explanation:

The number of valence electrons= the group number

Answer:

c) 3 valence elcertons

Answer: Here are some examples of atoms that behave similarly to chlorine in terms of electron affinity:

Fluorine (F) has the highest electron affinity of any element, so it is more electronegative than chlorine. However, fluorine and chlorine are both halogens, which means that they have similar chemical properties.

Bromine (Br) is also a halogen, and it has a very similar electron affinity to chlorine. In fact, bromine is often used as a substitute for chlorine in organic chemistry.

Iodine (I) is the third halogen, and it has a slightly lower electron affinity than chlorine. However, iodine is still a very electronegative element, and it behaves similarly to chlorine in many chemical reactions.

Nitrogen (N) is not a halogen, but it has a relatively high electron affinity. This is because nitrogen has a small atomic radius, which means that its valence electrons are held more loosely than the valence electrons of larger atoms.

Oxygen (O) is also not a halogen, but it has a relatively high electron affinity. This is because oxygen has a small atomic radius and it also has two unpaired valence electrons.

Explanation: Fluorine has the highest electron affinity, followed by chlorine, bromine, and iodine.

Nitrogen and oxygen also have high electron affinities because they have small atomic radii and unpaired valence electrons.

Atoms with high electron affinity are more likely to attract electrons, which means they are more electronegative.

Answer: 294.3 g/mol

Explanation: Calculate the molar mass of aspartame.

Answer:

Include:

--Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

--Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

--Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

I Hope This Helps You!

Answer:

Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Explanation:

edge.

Answer:

For homogeneous:

Filteration, vaporization, and a reverse chemical reaction

Explanation:

1) precipitation/crystallization reactions - if one of the components can form a solid salt when the solution undergoes several factors (concentration change, temperature change, etc); separation can be done either by filtration, centrifugation, or simple decantation.

(2) chromatography - separation can be based on the mobility of the phases (liquid chromatography, gas chromatography, ion-exchange, etc.)

(3) solvent extraction - if the components are both liquid, separation based on their relative solubilities

(4) distillation - separation based on different boiling points.

(5) magnetic separation - if one of the components have magnetic properties.

(6) electrophoresis - separation of organic molecules based on the type of gel used

heterogeneous:

Main methods of separation of heterogeneous mixtures

- Magnetic separation

- Sublimation

- Decantation

Liquid-solid mixture

Liquid-liquid mixture

- Filtration

- Centrifugation

Themes of interest

Answer:

2.4 × 10-1

Explanation:

Answer:

3.33 tanques de O₂

Explanation:

Basados en la reacción:

2C₂H₂(g) + 5O₂(g) → 4CO₂(g) + 2H₂O(g)

2 moles de acetileno reaccionan con 5 moles de oxígeno produciendo 4 moles de dióxido de carbono y 2 moles de agua

La ley de Avogadro dice que el volumen de un gas bajo temperatura y presión constantes es proporcional a las moles de este gas. Así, como 2 moles de acetileno reaccionan con 5 moles de oxígeno, los litros de O₂ necesarios para quemar 9340L de acetileno son:

9340 L C₂H₂ × (5 moles O₂ / 2 moles C₂H₂) = 23350L de O₂

Si un tanque contiene 7x10³ L de O₂ serán necesarios:

23350L O₂ ₓ (1 tanque / 7x10³L) = 3.33 tanques de O₂

Due to its tiny size and high charge, lithium ion is most likely to combine with OH- to produce a soluble ionic molecule. Although they have a lower solubility, Ag+, Pb2+, Ni2+, and Zn2+ can also form ionic compounds.

With potassium cation  and hydroxide anion , the +1 charge already counterbalances the -1 charge, without the need for additional cations or anions. This indicates that to create a neutral chemical with the formula , one unit of each ion must be added.

When naming binary ionic compounds, the nonmetal anion (element stem + -ide) comes after the cation (specifying the charge, if necessary). Without employing prefixes, it is possible to tell from the compound name how many of each element are present.

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Approximately 176.3 grams of tin (II) fluoride (SnF2) are produced when 45.0 grams of HF react.

The balanced chemical equation for the reaction between hydrofluoric acid (HF) and tin (II) fluoride (SnF2) is:

2 HF + SnF2 → SnF4 + 2 HCl

This equation tells us that for every 2 moles of HF that react with SnF2, we will get 1 mole of SnF4 produced.

To determine how many grams of SnF2 are produced from 45.0 grams of HF, we need to first convert the mass of HF to moles using its molar mass. The molar mass of HF is approximately 20.01 g/mol:

45.0 g HF × (1 mol HF / 20.01 g HF) = 2.25 mol HF

According to the balanced equation, 2 moles of HF react with 1 mole of SnF2. Therefore, we can determine the moles of SnF2 produced by dividing the moles of HF by 2:

2.25 mol HF ÷ 2 = 1.125 mol SnF2

Finally, we can convert the moles of SnF2 to grams using its molar mass, which is approximately 156.70 g/mol:

1.125 mol SnF2 × (156.70 g SnF2 / 1 mol SnF2) ≈ 176.3 g SnF2

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The products of the acid hydrolysis of ester are carboxylic acid and alcohol.

Acid hydrolysis of esters involves heating esters in a large excess of water in the presence of a strong acid catalyst. The products of such reactions are carboxylic acid and alcohol as shown in the below example.

\(CH_3COO(CH_2)_3CH_3 + H_2O --- > C_4H_9OH + CH_3CO_2H\)

Acid hydrolysis of esters is the reverse of the esterification process. During ester formation or esterification, carboxylic acids and alcohols react to produce ester and water as follows:

\(C_4H_9OH + CH_3CO_2H-- > CH_3COO(CH_2)_3CH_3 + H_2O\)

Thus, acid hydrolysis of esters is a reversible reaction that does not go into completion ordinarily.

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The balloon filled with hydrogen gas at room temperature will shrink the fastest. This is because hydrogen gas molecules are much smaller and lighter than molecules in clean air.

At room temperature, the hydrogen molecules will move around more rapidly and collide with the walls of the balloon more frequently, creating a higher pressure inside the balloon. This high pressure will cause the balloon to shrink faster than the other balloons.
When hydrogen gas is cooled to 0°C, the molecules slow down, resulting in lower pressure and slower shrinking of the balloon. Clean air, which consists mainly of nitrogen and oxygen molecules, is also heavier and larger than hydrogen molecules. Therefore, clean air molecules will move around more slowly, resulting in lower pressure and slower shrinking of the balloon.
In conclusion, the balloon filled with hydrogen gas at room temperature will shrink the fastest due to the small size and high mobility of hydrogen molecules.

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Answer:

Explanation:

Where do we put all the carbon?

Most of Earth's carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms. These are the reservoirs through which carbon cycles.

What’s so weird about prime numbers?

First, except for the number 2, all prime numbers are odd, since an even number is divisible by 2, which makes it composite. So, the distance between any two prime numbers in a row (called successive prime numbers) is at least 2.

How do we beat bacteria?

To cure a bacterial infection, our best bet is to use antibiotics. These are medicines that kill bacteria or slow down their growth. Using the wrong antibiotic, or using them to fight viruses, can lead to resistance. Resistance happens when some of the bacteria that are growing can't be hurt by the antibiotic.

Can computers keep getting faster?

Computers are becoming faster and faster, but their speed is still limited by the physical restrictions of an electron moving through matter.

What’s at the bottom of a black hole?

By definition, we can't observe what's inside a black hole, because no light – no information of any kind – can escape. But astrophysical theories suggest that, at the core of a black hole, all the black hole's mass is concentrated int    Reduce the number of trips you take in your car.

  Reduce or eliminate fireplace and wood stove use.

  Avoid burning leaves, trash, and other materials.

  Avoid using gas-powered lawn and garden equipment.o a tiny point of infinite density. This point is known as a singularity.

What would you do to solve pollution problems?

Answer:

This image attached should help:

Explanation:

The reason that food web contains all organisms is because it shows every relationship, where food chain shows a more basic one. And the reason that they both have producers, consumers, and decomposers, is because they bothat least highlight a part of the almost every aspect, although it leans more to food web.

here's the answer to the question in the image, I couldn't comment on the right question because a bot already did.

1. ant, love

active

2. dog, man

dormant

3. bug, ring

burning

4. dress, up

pressure

5. think, tiger

trinker

Taking into account the definition of density, the volume of the iron sample is 14.50 cm³.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Density= 7.86 g/cm³

Mass= 114 g

Volume= ?

Replacing in the definition of density:

7.86 g/cm³= 114 g÷ volume

Solving:

7.86 g/cm³× volume= 114 g

volume= 114 g÷ 7.86 g/cm³

volume= 14.50 cm³

In summary, the volume of the iron sample is 14.50 cm³.

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Ka=5.3*10^(−11) By definition, Ka will be equal to Ka= [H3O+]*[A-]/[HA]Now use the pH of the solution to determine the equilibrium concentration of hydronium

We shall first ascertain the pKa of the solution before calculating the Ka. The pH of the solution and the pKa of the solution are equal at the equivalence point. As a result, we can quickly calculate the value of Ka using a titration curve and the equation Ka = - log pKa.

The ionisation constant (Ka) of formic acid can be calculated by the following formula;-

Ka = {[H+] * [HCOO-]} / [HCOOH]

Therefore you would need to know the value of each of the three concentration values on the right-hand side of the equation.

The equation for the dissociation of formic acid is;-

HCOOH ⇌ H+ + HCOO-

From this equation it can be seen that, at any degree of ionisation, the moles of H+ ions produced is equivalent to the moles of HCOO- ions. Therefore we can say that;-

[H+] = [HCOO-]

So, the equation for Ka in this case becomes;-

Ka = {[H+] * [H+]} / [HCOOH]

Ka = [H+]^2 / [HCOOH]

So, we have simplified our Ka formula down to two values, the H+ ion concentration [H+], and the concentration of undissociated formic acid [HCOOH]. To calculate the Ka for formic acid, we therefore need to either measure, or be given these values.

For example, if we started with a solution of formic acid which was 0.1M, we could measure its pH. Since pH = -log[H+], we could then calculate the H+ ion concentration and solve the Ka equation.

As it turns out the pH of a 0.1M formic acid solution is 2.38. Therefore, for this formic acid solution;-

-log([H+]) = 2.38

log([H+]) = -2.38

[H+] =10^(-2.38)

[H+] = 0.0042 M

Also, since formic is a relatively weak acid we can use the original solution concentration. i.e. [HCOOH] = 0.1M

Now we can solve the Ka equation we simplified above;-

Ka = [H+]^2 / [HCOOH]

Ka = (0.0042 )^2 / 0.1

Ka = 1.764 * 10^-4

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Most of the weather of the world is based upon changes in the moisture, pressure or temperature of the troposphere.

The layer closest to the surface of the Earth is troposphere. This layer goes up to twenty kilometers above the Earth. The troposphere is very essential as it contains the weather of the Earth and also greenhouse gases to maintain the temperature on Earth.

Troposphere layer has the air humans breathe and the clouds in the sky. The air is densest in this lowest layer and the troposphere has three-quarters of the mass of the entire atmosphere. The air in troposphere is 78% nitrogen and 21% oxygen.

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if the mass of the sample is 272 grams, the number of moles of anhydrate present would be:

moles = 2

Generally, To determine the number of moles of anhydrate present, you would need to know the mass of the sample. If you have that information, you can use the formula:

moles = mass / molar mass

Where

mass is the mass of the sample in grams and

molar mass is the molar mass of the salt (in this case, 136 g/mol).

For example, if the mass of the sample is 272 grams, the number of moles of anhydrate present would be:

moles = 272 / 136

= 2

Please provide me with more information so that I could give you more accurate answer.

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Answer:

Suspensions consist of a powder that have to be mixed with a liquid solution. Colloids are a homogenous mixture such as a gel and an emulsion. Suspensions are heterogenous mixtures.

Explanation:

An example of a suspension could be amoxicillin powder which would have to be reconstituted with a certain amount of water in mLs depending on the amount of powder that needs to be reconstituted.

An example of a Colliod would be something that can not be separated such as sugar in tea. Collids would be a homogenous mixture.

Answer:

1

Explanation:

1

Answer:

NO

The mass number of an atom is the total number of protons and neutrons it contains. The mass number of an atom is never smaller than the atomic number.

EXPLANATION:-

The atomic number is always a lesser value than the mass number. The mass number is always a greater value than the atomic number. Atoms are made of electrons, protons, and neutrons. Protons and neutrons together form the nucleus of an atom

Atomic number = number of proton/number of electron

mass number = number of proton + number of Neutron

PLS RATE A BRAINLIEST

Answer:

Rocks get older as we go away from the Mid Atlantic Ridge  towards the continents

Explanation:

As the plates move away from each other, new ocean lithosphere is created at the ridge. This also widens the ocean basin and leads to sea floor spreading.

The rock of the ocean floor are symmetrically aligned and they get become older as they move away from the crest of the ridge.

Thus, rocks get older as we go away from the Mid Atlantic Ridge  towards the continents

Answer:

the answer is D

Explanation:

i hope it's rite.

Answer:

1) 7.80 X 10^22\(\frac{1}{6.02*10^{23} }\) = .13

2) 5.6 \(\frac{6.02*10^{23} }{1}\) = 3.4 X 10^24

3)3.81 \(\frac{1}{74.55}\) X \(\frac{6.02*10^{23} }{1}\) = 3.08 X 10^22

4) 399.91 \(\frac{4.05*10^{23} }{6.02*10^{23} }\) = 269

5)4.32 \(\frac{1}{18.01}\) X \(\frac{22.4}{1}\) = 5.37

Explanation:

For 2 the correct answer is 3.4 instead of 3.2. The 3.4 is rounded from 3.37. Sadly I couldn't figure out the bonus.

In the 23rd century, the mass ratio of H:S:O in sulfuric acid will remain 1:8:32.

We know from the law of definite proportions that irrespective of the path through which a chemical compound is obtained, it has a fixed composition by mass.

As such, the composition of a chemical substance does not vary. Therefore, in the 23rd century, the mass ratio of H:S:O in sulfuric acid will remain 1:8:32.

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Answer:

double replacement

Explanation:

Explanation:

When it comes to assigning oxidation number to elements, the following rules should be observed;

1. Oxidation number of a neutral compound is zero and is equal to the sum of the oxidation numbers of the element.

2. Oxidation number of hydrogen is +1 except in hydrides where it is -1. Oxidation number of oxygen is -2 except in peroxides where it is -1.

3. For some elements, their oxidation number is equal to their group number.

(a) CaO

Let the oxidation number of Ca be x

Using rules 1 and 2;

Oxygen = -2

x + (-2) = 0

x - 2 = 0  ; x = 2

(d) KMnO4

K belongs to group 1 hence has oxidation number of +1

O = -2

Let the oxidation number of Mn be x

+ 1   +  x   + 4(-2) = 0

1 + x -8 = 0

x = +7

(b) NaHSO4

Na belongs to group 1 hence has oxidation number of +1

O = -2

Hydrogen = +1

Let the oxidation number of S be x

+ 1   +  1  + x   + 4(-2) = 0

2 + x -8 = 0

x = +6

(e) NaH PO4

Na belongs to group 1 hence has oxidation number of +1

O = -2

Hydrogen = +1

Let the oxidation number of P be x

+ 1   +  1  + x   + 4(-2) = 0

2 + x -8 = 0

x = +6

Fe304

Let the oxidation number of Fe be x

Using rules 1 and 2;

Oxygen = -2

3x + 4(-2) = 0

3x - 8 = 0  ; x = 8/3

For Fe3O4, two Fe atoms have an oxidation state of +3 and one of +2

(f) NaBH4

Na belongs to group 1 hence has oxidation number of +1

Hydrogen = +1

Let the oxidation number of B be x

+ 1   + x   + 4(1) = 0

1 + x + 4 = 0

x = -5

Answer: The combination of genes and environmental factors affects the growth of an organism.

Explanation:

Gene consists of DNA and it's heredity physical and functional unit. Genes play a vital role in a organisms growth. For example in humans, if one's parents are tall, there's a large tendency that such child will be tall and vice versa.

Environmental temperature also affects growth of living organisms. These include water soil pH, temperature, gender, chemicals etc. These all affects growth, it should be noted that proteins in living organisms can be damaged at a certain temperature which invariably affects the growth of such organism.

Also, the environment influences gene expressions as temperature, light, drugs, and chemicals, affects genes as they determine which ones will either be turned on or off which will further lead to how such organism grows.