Find the mass of a sample of O2 gas which occupies. 95 L at 1. 2 atm and 355 K.

-1. 2 g O2

-. 012 g O2

-. 62 g O2

-6. 2 g O2

Answer: Molarity of the solution: 0.12

Molarity of sulfate ion: 0.360

Molarity of aluminum ion: 0.240

Explanation:

I’m not sure if that’s what you’re looking for

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass of metal = 67.6 g

volume = 12.8 mL

The density of the metal is

\(density = \frac{67.6}{12.8} \\ = 5.28125\)

We have the final answer as

Hope this helps you

Answer:

1. Covalent Bond

2. Isomers

3. Molecular and Empirical Formula

4. The Structural Formula

5. Diatomic Molecules

1. Hydrogen and Tetraoxosulphate. There are 2 atoms of hydrogen and 4 atoms of tetraoxosulphate.

Explanation:

Sorry, I wrote all I know

Time = distance ÷ speed

Time = 1950 ÷ 600

Time = 3.25 hours ( 3 hours 15 minutes )

Answer:

nitrogen

Explanation:

Answer:

Beryllium

Explanation:

The decomposition of wastewater can lead to the following:

II. Eutrophication and algal blooms.

III. The development of dead zones.

A wastewater can be defined as a body of water that has been contaminated due to human use in homes, offices, schools, businesses etc.

Ideally, wastewater should be disposed in accordance with the local regulations and standards because they typically are unhygienic for human consumption or use. Thus, floor drain are used in the kitchen, bathroom and toilet to remove wastewater, so as to mitigate stagnation and to improve hygiene.

Generally, the decomposition of wastewater can lead to the following:

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Since we are going from a larger unit to a smaller unit, we multiply.

So we multiply 1.25 by the conversion factor, which is 1,000.

This gives us 1,250 grams

Answer:

Dipole dipole interaction

Explanation:

Answer:

Explanation:

Answer:

C Hope This Helped!

Answer:

The correct answer is B. 1-propanamine.

Explanation:

Amines can form hydrogen bonds with water molecules, which makes them soluble in water. The more hydrogen bonding sites an amine has, the more soluble it will be in water.

Out of the given options, 1-propanamine has only one carbon chain, which allows it to form more hydrogen bonds with water molecules compared to amine molecules with longer carbon chains. Also, it does not have any other functional groups that could interfere with hydrogen bonding. Therefore, 1-propanamine would be the most soluble in water.

Hope it helps!

Answer:

Its D. Light energy to to electrical energy

Explanation:

Answer:

D. Light energy to electrical energy

Explanation:

its lowkey obvious lol

0.459 moles of H₂O can be formed from 1.84 x 10²³ molecules of NH₃.

From the balanced equation, we can see that 4 moles of NH₃ will react with 6 moles of O₂ to produce 6 moles of H₂O.

So, the ratio of moles of NH₃ to moles of H₂O is 4:6, or 2:3

Using the coefficients in the balanced chemical equation, you can calculate the moles of H₂O that can be formed from 1.84 x 10²³ molecules of NH₃.
Calculate the moles of NH₃:  Number of molecules of NH₃ / Avogadro's number
\((1.84 * 10^{23} / 6.022 * 10^{23} ) = 0.306 \ moles\ NH3\)
Calculate the moles of H₂O formed:
0.306 moles NH₃ x (6 moles H₂O/4 moles NH₃) = 0.459 moles H₂O

\(0.306 * (6/4) \ = 0.459 \ moles \ H2O\)
Therefore, the number of moles of H₂O which can be formed from 1.84 x 10²³ molecules of NH₃ is 0.459

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The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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When refrigerant is in a high-pressure, high-temperature state, it enters the metering device. The refrigerant is then changed to a low-pressure, low-temperature state as a result of the metering device. As a result, the refrigerant will expand and the heat will be absorbed as the temperature decreases.

The metering device is a component in a refrigeration or air conditioning system that ensures that the correct amount of refrigerant is delivered to the evaporator. The device functions as a flow control, reducing the refrigerant's pressure before it reaches the evaporator. The metering device may be a simple capillary tube, an orifice, an automatic expansion valve (AEV), or a thermostatic expansion valve (TXV). The capillary tube is the simplest and least expensive metering device. It's just a small copper tube that's thin and long. The AEV is a constant pressure valve that maintains a consistent pressure drop across it, allowing it to regulate the refrigerant flow. A thermostatic expansion valve is the most sophisticated metering device, as it can sense the temperature at the evaporator outlet and adjust the refrigerant flow accordingly.

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6.94 is much more closet to 7.016, so Li 7 is more abundant

Compounds have fixed composition, properties and are chemically bonded while mixtures have variable composition, properties and are physically mixed.

Mixtures and combinations are two distinct sorts of substances. Compounds are unadulterated substances made out of at least two components synthetically reinforced together in a decent proportion, while blends are blends of at least two substances that are truly blended yet not artificially consolidated. Three manners by which mixtures and combinations vary are:

Piece: Mixtures have a proper creation and a particular proportion of molecules or particles, while blends have a variable synthesis with no particular proportion.

Properties: Mixtures have unmistakable properties, like a particular dissolving point, edge of boiling over, and compound reactivity, while blends have a scope of properties that rely upon the substances in the combination.

Detachment: Mixtures must be isolated by substance implies, like through a compound response, while blends can be isolated by actual means, like filtration, refining, or chromatography.

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Answer: F : Gas

Explanation:

Answer:C.) It has one group in which the manipulated variable is tested, and another in which the responding variable is tested

Explanation: hope this helps

The statement that describes a controlled experiment is that it has one group in which the manipulated variable is tested, and another in which the responding variable is tested (option C).

A controlled experiment is an experiment where one variable is tested at a time and all other variables are kept constant.

An experiment consists of a manipulated or independent variable, which is the variable changed, and a responding or dependent variable, which is the variable measured.

Therefore, statement that describes a controlled experiment is that it has one group in which the manipulated variable is tested, and another in which the responding variable is tested.

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The subatomic particles that have the least mass are electrons. This is because they have a much smaller mass than protons and neutrons.  

Subatomic particles are the basic constituents of matter, which includes protons, neutrons, and electrons. Among these subatomic particles, electrons are the lightest in mass. Protons and neutrons are found in the nucleus of an atom while electrons move around the nucleus.

Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. The mass of electrons is 9.10938356 × 10^-31 kg, while the mass of protons and neutrons are approximately 1.67 × 10^-27 kg.

Electrons are 1/1836th the mass of protons and neutrons. This makes them the least massive of the subatomic particles. Electrons play an important role in chemical bonding, electrical conductivity, and energy transfer in atoms and molecules.

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The pH of the solution after adding NaOH(aq) is 4.8.

Volume of NaOH solution = 90.0 ml = 0.0900 L

Molarity of NaOH = 1.15 M

Initial volume of the buffer solution = 250.0 ml = 0.2500 L

Concentration of the buffer solution = 1.00 M

First, let's calculate the moles of NaOH:

Moles of NaOH = volume of NaOH solution × molarity of NaOH

= 0.0900 L × 1.15 M

= 0.1035 moles

Since NaOH is a strong base, the number of moles of OH^- ions is also 0.1035 moles.

Next, we'll determine the change in moles of HA and A^- due to the reaction with OH^- ions:

Change in moles of HA = Change in moles of A^- = 0.1035 moles

Now, let's calculate the new concentrations of HA and A^-:

Final volume of the buffer solution = initial volume of the buffer solution + volume of NaOH solution

= 0.2500 L + 0.0900 L

= 0.3400 L

For HA:

Initial moles of HA = concentration of HA × initial volume of buffer solution

= 1.00 M × 0.2500 L

= 0.2500 moles

Final moles of HA = initial moles of HA - change in moles of HA

= 0.2500 moles - 0.1035 moles

= 0.1465 moles

Final concentration of HA = Final moles of HA / final volume of buffer solution

= 0.1465 moles / 0.3400 L

≈ 0.431 M

For A^-:

Initial moles of A^- = concentration of A^- × initial volume of buffer solution

= 1.00 M × 0.2500 L

= 0.2500 moles

Final moles of A^- = initial moles of A^- - change in moles of A^-

= 0.2500 moles - 0.1035 moles

= 0.1465 moles

Final concentration of A^- = Final moles of A^- / final volume of buffer solution

= 0.1465 moles / 0.3400 L

≈ 0.431 M

Since the final concentrations of HA and A^- are the same, the buffer solution remains a buffer after the addition of NaOH.

To determine the pH of the solution, we can use the Henderson-Hasselbalch equation:

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

pKa = 4.8

pH = 4.8 + log(0.431/0.431)

= 4.8 + log(1)

= 4.8 + 0

= 4.8

Therefore, the pH of the solution after adding NaOH(aq) is 4.8.

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Answer:

1.. all atoms contain tiny negatively charged subatomic particles or electrons.

2..The atom, as described by Ernest Rutherford, has a tiny, massive core called the nucleus. The nucleus has a positive charge

3...he bombarded Beryllium with alpha particles from the natural radioactive decay of Polonium.

4..Theories can be improved or modified as more information is gathered so that the accuracy of

The 5 electrons are present in the valence shell so group number 15 or VA or 5A electronic configuration ns^2 np^3, 4 electrons are present in the valence shell so the group number 14 or 1VA or 4 A electronic configuration ns^2 np^2.

What is an electron ?

The negatively charged components of an atom are known as electrons. All of an atom's electrons combine to form a negative charge that counteracts the positive charge of the protons in the atomic nucleus. In comparison to all the other components of the atom, electrons are quite tiny.

What is an  electron configuration?

The placement of electrons in orbitals around a nuclear nucleus is known as electronic configuration, also known as electronic structure or electron configuration.

A, 5 electrons are present in the valence shell so group number 15 or VA or 5A electronic configuration ns^2 np^3.

B, 4 electrons are present in the valence shell so the group number 14 or 1VA or 4 A electronic configuration ns^2 np^2

Therefore,  5 electrons are present in the valence shell so group number 15 or VA or 5A electronic configuration ns^2 np^3, 4 electrons are present in the valence shell so the group number 14 or 1VA or 4 A electronic configuration ns^2 np^2.

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Answer:

2 elements

Explanation:

There are the two elements that make water

The calorimeter constant when 51.203g of water at 55.2c is added to a calorimeter containing 49.783g of water at 23.5c and for the system to equilibrate, the final temperature reached is 37.6c is  9.67J/gc.

Given mass of water (m1) = 51.203g

Temperature of water (T1) = 55.2c

mass of water (m2) = 49.783g

Temperature of water (T2) = 37.6c

the final temperature reached is = 37.6c

We know that specific heat (Q) = mCpΔT where m is mass Cp is latent heat and ΔT is change in temperature.

So Qwater = 51.203 x 4.184 x (23.5 - 55.2) = 6791.9J

Qcalo = 49.783 x Cp x (23.5 - 37.6) = 701.9 x Cp

Given that Qwater = Qcalo

6791.9J = 701.9 x Cp

Cp = 9.67J/gc

Hence the calorimeter constant is  9.67J/gc

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Using the given mass of the compound (0.520 g) and the calculated moles, we can determine the molar mass of the compound.

To find the molar mass of the compound, we can use the formula:

ΔT = Kf * m

where ΔT is the freezing point depression, Kf is the cryoscopic constant (in this case, 3.90 °C/m), and m is the molality of the solution.

First, we need to calculate the molality (m) of the solution:

m = moles of solute / mass of solvent (in kg)

The mass of the solvent (lauric acid) is given as 4.62 g. Since the unknown compound is a solute, we need to convert its mass to moles:

moles = mass / molar mass

Given that the mass of the unknown compound is 0.520 g, we can now calculate the moles of the compound.

Next, we convert the mass of the solvent to kg by dividing by 1000:

mass of solvent (lauric acid) = 4.62 g / 1000 = 0.00462 kg

Now we can calculate the molality:

m = moles of solute / mass of solvent = (moles of the compound) / (mass of solvent)

Finally, we can use the freezing point depression formula to find the molar mass of the compound:

ΔT = Kf * m

Substituting the given values:

4.20 °C = 3.90 °C/m * m

Now solve for m:

m = (4.20 °C) / (3.90 °C/m)

Once we have the molality, we can calculate the moles of the compound:

moles = molality * mass of solvent (in kg)

Finally, we calculate the molar mass:

molar mass = mass of solute / moles of solute

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A characteristic of a material that can be seen or measured without altering its chemical makeup is said to have a physical property. The physical asset has the quality of being "malleable" among the possibilities.

The term "malleability" describes a material's capacity to take on diverse shapes without breaking. By pressing on the substance and monitoring how it responds, this attribute may be evaluated and measured.

Chemical properties refer to how a substance behaves in a chemical process, especially its ignition and burning potential. The option "does not burn" refers to this behavior. Option "becomes moldy rapidly" also refers to a substance's propensity to experience a biological transformation through decomposition and is therefore a chemical attribute. Option "easy to digest" refers to the ability of the substance to be broken down in the digestive system, making it a biological property rather than a physical one.

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When a nitrile is treated with an excess of LiAlH4 followed by water, the obtained product is a primary amine.

1. Nitrile (RC≡N) reacts with excess LiAlH4 (lithium aluminum hydride), which is a strong reducing agent.
2. The LiAlH4 reduces the nitrile to an imine (RCH=NH) intermediate.
3. The imine intermediate is further reduced by the excess LiAlH4 to form an aldimine (RCH2-NH2).
4. Finally, water (H2O) is added to the reaction to hydrolyze any remaining LiAlH4, and the primary amine (RCH2-NH2) is obtained as the final product.

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molar mass of Cu(OH)2 is 97.561 means 1 mole of Cu(OH)2 mass is 97.561

so 1gm of Cu(OH)2  have 1/97.561 moles

by unitary method no of moles in Cu(OH)2 is

9.2*1/97.561=0.094 mole

i hope it helps btw i am from india