A steel calorimeter has a volume of 75.0 mL and is charged with Oxygen gas to a
pressure of 255 kPa at 22.5°C. What is the amount of Oxygen molecules
present

Answer:

Eukarya

Explanation:

Organisms in the domain Eukarya keep their genetic material in a nucleus and include the plants, animals, fungi, and protists.

☁️ Answer ☁️

annyeonghaseyo!

Your answer is:

it can bond with oxygen to form rust or iron oxide. and it can bond with carbon to form steel.

Here's another one: Iron bonds with lots of things: Oxygen (Ferric Oxide = rust),Chlorine (Ferric Chloride]), Fluorine, ... , even other Iron (in aMetallic Bond or crystal).

Hope it helps.

Have a nice day hyung/noona!~ ￣▽￣❤️

Answer:

0.17 moles

Explanation:

In the elements of the periodic table, the atomic mass = molar mass. Ex: Atomic mass of Carbon is 12.01 amu which means molar mass of Carbon is also 12.01g/mol.

In order to find the # of moles in a 12 g sample of NiC-12, we will need to multiply the number of each atom by its molar mass and then add the masses of both Nickel and C-12 found in the periodic table:

Since there's just one atom of both Carbon and Nickel, we just add up the masses to find the molar mass of the whole compound of NiC-12.

There's 12g of NiC-12, which is less than the molar mass of NiC-12, so the number of moles should be less than 1. In order to find the # of moles in NiC-12, we need to do some dimensional analysis:

P.S. C-12 or C12 just means that the Carbon atom has an atomic mass of 12amu and a molar mass of 12g/mol, or just regular carbon.

Answer:

V₂ = 50.93 L

Explanation:

Initial volume, [tex]V_1=43.1\ L[/tex]

Initial temperature, [tex]T_1=24^{\circ} C=24+273=297\ K[/tex]

Final temperature, [tex]T_2=78^{\circ} C=78+273=351\ K[/tex]

We need to find the final volume of the gas. The relation between the volume and the temperature is given by :

[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{43.1\times 351}{297}\\\\V_2=50.93\ L[/tex]

So, the final volume of the gas is 50.93 L.

Answer:

0.416moles

Explanation:

Using the formula;

number of moles = mass ÷ molar mass

Molar mass of CO2 = 12 + 16(2)

= 12 + 32

= 44g/mol

According to the information in this question, there are 18.3g of CO2

number of moles (n) = 18.3/44

= 0.4159

= 0.416moles of CO2

Answer:

B

Explanation:

Answer: The concentration of this solution is [tex]114g/dm^3[/tex]

Explanation:

Concentration of a solution is defined as the number of grams of solute dissolved per liter of the solution.

Given : mass of solute = 28.4 g

volume of solution = [tex]250cm^3=0.25dm^3[/tex]      [tex]1cm^3=0.001dm^3[/tex]  

[tex]Concentration=\frac{28.4g}{0.25dm^3}=114g/dm^3[/tex]

Thus the concentration of this solution is [tex]114g/dm^3[/tex]

By definition and change of units, the concentration of this solution is 113.6 [tex]\frac{grams}{dm^{3} }[/tex].

Chemical concentration determines the ratio of solute and solvent in a chemical solution and is defined as the ratio of the amount or volume of solute to the amount of solution. The more solute, the higher the concentration in a solution.

In this case, you know:

mass of solute= 28.4 g

volume of solution= 250 cm³= 0.25 dm³ (being 1 cm³= 0.001 dm³)

Then, the concentration can be calculated as:

[tex]concentration= \frac{28.4 grams}{0.25 dm^{3} }[/tex]

Concentration= 113.6 [tex]\frac{grams}{dm^{3} }[/tex]

Thus the concentration of this solution is 113.6 [tex]\frac{grams}{dm^{3} }[/tex].

Learn more about concentration:

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Answer:

3.25 mol CO₂

Explanation:

Step 1: Write the balanced equation

C(s) + O₂(g) ⇒ CO₂(g)

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of O₂ to CO₂ is 1:1.

Step 3: Calculate the number of moles of CO₂ produced from 3.25 moles of O₂

We will use the previously established molar ratio.

3.25 mol O₂ × 1 mol CO₂/ 1 mol O₂ = 3.25 mol CO₂

Answer:

i think the answer is... A

Answer:

1. troposphere

2. less dense/decreases

3. ozone

4. nitrogen

5. xylem

6. flagellum

7. kingdom fungi

8. Ocean convection currents

9. As they fly, insects spread pollen that sticks to their bodies from the flowers.

10. the plastic handle, because it is a good insulator.

11. The hyphae, or feeding structures, reach deep into the wood to obtain nutrients

12. chemical energy

13. created or destroyed.

14. electromagnet

15. c

16. kinetic, elastic potential

Answer: 90 degrees        .

Answer:

it's b.

Explanation:

thank u so much for this. i appreciate it. lol.

Answer:

266.3 g

Explanation:

The balanced reaction is:

First we convert 2.3 moles of AlPO₄ to moles of Li₃PO₄, using the stoichiometric coefficients:

Then we convert Li₃PO₄ moles into grams, using its molar mass:

Answer:

idfk man but someone will HELP

Explanation:

Answer:

and can cause changes in motion. Inertia.

Explanation:

Answer:  change its motion.

Explanation: hope this helps :)

Answer:

I think a red flower with one part colored yellow

Explanation:

a red flower with one part colored yellow

Complete Question:

Which statement is true about air temperature and humidity?

Group of answer choices.

a. the air temperature does not affect how much moisture the air can hold

b. hotter air holds less moisture than colder air.

c. hot air and cold air share the same amount of moist.

d. colder air holds less moisture than hotter air.

Answer:

d. colder air holds less moisture than hotter air

Explanation:

Weather can be defined as the atmospheric conditions of a particular area over a short period of time.

The elements of weather include precipitation, wind, temperature, atmospheric pressure, relative humidity, cloud, and wind speed.

Temperature can be defined as a measure of the degree of coldness or hotness of a physical object (body).

On the other hand, humidity refers to the concentration (amount) of water vapor that is present in the air. It is high when there's a lot of water vapor in the air and low when the level of water vapor is small.

Hence, the true statement about air temperature and humidity is that colder air holds less moisture than hotter air because as the air cools, its molecules move closer together while the molecules move farther apart as the air become hot.

Additionally, at constant humidity, relative humidity is inversely proportional to temperature i.e as the temperature decreases, relative humidity increases.

Answer: colder air holds less moisture than hotter air

Explanation:

Answer:

Explanation:

-Reactants-

C: 1

O: 3

H : 2

-Products-

C: 6

O: 8

H: 12

Since these two are not equal, this reaction is not balanced.

Here is the balanced reaction:

6CO2+6H2O ⇒ C6H12O6+6O2

Answer: human induced global warming

Explanation:

It’s the only one that makes sense if you read the question

Answer:

it decreases

Explanation:

because its false

Answer:

True

Explanation:

The pressure will increase because the heat will make the molecules move around and spread out more.

If you want I could go into more detail with the explanation.

Answer:

4.0561×0.03÷63.5= 0.001916 mol cu

A coin is 3.00% Cu by mass. If the mass of the coin is 4.0561g, moles of Cu does it contain 0.001916 mole of Cu.

It is the most fundamental characteristic of matter and one of the fundamental quantities in physics.

Mass is a term used to describe how much matter is there in a body. The kilogramme is the SI unit of mass (kg). A body's mass does not alter at any point in time.

Given mass of coin = 4.0561g , moles =? , Cu by mass= 3.00%

4.0561×0.03÷63.5= 0.001916 mole Cu.

Thus, A coin is 3.00% Cu by mass. If the mass of the coin is 4.0561g, moles of Cu does it contain 0.001916 mole of Cu.

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This reaction is different in that the carbon undergoes an incomplete combustion as opposed to complete combustion where carbon is fully oxidized. A caveat: incomplete combustion products in general can be difficult to predict without sufficient information, as it's not uncommon to obtain a mixture of different products.

Here, we are told that solid carbon is burned in limited air to produce a gas. I am presuming that, in the equation that's given, the "0" represents a blank where you must fill in a chemical symbol. In this case, our equation would be: 2C(s) + O₂(g) → 2CO(g).

There is not enough information here to provide the numerical answers to the two questions. From the words in the question (e.g., "is different" and "this time"), it would seem that this question is an excerpt from a larger or preceding question where specific numbers had been provided or computed.

However, it's possible to make some general observations on how one may go about answering these questions if one had more information.

Since we're to assume that oxygen is the limiting reagent, if one is given the amount of solid carbon (either in mass, moles, or number of atoms), it's possible to determine the moles of CO(g) that's produced since C and CO have an equal stoichiometric ratio. So, for example, if one burns 2 moles of C(s), then 2 moles of CO(g) would be produced.

But, there is still not enough information to compute the volume of CO gas if this is the line of questioning. We don't know, for instance, the temperature or pressure of the reaction conditions. In fact, the only way it would be possible to answer this would be if you were given beforehand a conversion factor that relates the volume of CO(g) to its quantity (e.g., to assume that one mole of gas occupies x liters).

As for the second question, this would depend on what you know about the quantity of the C(s) reacted and/or the quantity (or volume, from question a) of CO(g) produced. If you can get the number of moles of C(s) reacted or CO(g) produced, the number of moles of O₂(g) used up: It would be half the number of moles of C(s) reacted or half the number of moles of CO(g) produced). Again, it's impossible to determine the volume of O₂(g) using just the information provided here, so I suspect that you must have further information relating gas quantity to volume. As we did with CO(g), the volume of O₂(g) used up can be found using whatever conversion factor you have.

If you have any further information or questions, please feel free to follow up.  

This reaction is distinct in that the carbon undergoes incomplete combustion rather than complete combustion, in which the carbon is completely oxidized. incomplete combustion products in general can be difficult to predict without sufficient information, as a mixture of different products is not uncommon.

Combustion is a chemical reaction in which a substance reacts with oxygen to produce heat. Combustible refers to a substance that can be burned. It is also known as a fuel. The fuel can be either solid, liquid, or gas.

We're told that solid carbon is burned in a small amount of air to produce a gas.

This would be determined by the amount of C(s) reacted and/or the amount (or volume, from question a) of CO(g) produced. If you can calculate the number of moles of C(s) reacted or CO(g) produced, you can calculate the number of moles of O2(g) consumed: It would be half the amount of C(s) reacted or half the amount of CO(g) produced).

Thus, This reaction is distinct in that the carbon undergoes incomplete combustion rather than complete combustion.

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