Chemistry Middle School

What amount of moles does 60.5 L of carbon dioxide occupy at 2.15 atm and 25 degrees C?

4.3 moles
5.3 moles
9.3 moles
2.5 moles

Answers

Answer 1

Answer: 5.3 moles

Explanation:

Hi, to answer this question we have to apply the next formula:

n = PV/RT

Where:

n = number of moles

P= Pressure = 2.15 atm

V= volume = 60.5 L

R = 0.0821 atm(L)/mol(K)

T = temperature = 25 °+ 273.15 = 298.15 Kelvin

Replacing with the values given:

n = 2.15 (60.5) / 0.0821 (298.15) = 5.3 moles.

Feel free to ask for more if needed or if you did not understand something.

Related Questions

pls answer the question plss

Answers

The Density Calculator uses the formula p=m/V, or density (p) is equal to mass (m) divided by volume (V). The calculator can use any two of the values to calculate the third. Density is defined as mass per unit volume. That sound give you the answer. Hope this Helps!

Yup and tanks it’s the same answer but I’m to lazy to answer right now

Iris is a farmer who has two fields. Field 1 is near the ocean and Field 2 is far inland. Iris is planting almonds, which require a lot of precipitation. Which field should Iris plant her almonds in?

Field 1, because the closer an area is to a body of water, the more precipitation there is.
Field 2, since inland areas are warmer, which causes greater amounts of precipitation.
Field 2, because the more inland an area is, the more precipitation there will be.
Iris could plant the almonds anywhere since the location of the fields does not affect precipitation.

Answers

Answer:

I think it is Option 3: Field 2, because the more inland an area is, the more precipitation there will be.

Explanation:

Whenever it rains, the water evaporates FROM the ocean and the wind blows clouds more towards inland, and it does rain more inland

Answer:

Explanation:

There is more moisture near an area that is close to a body of water which causes humidity, which results in precipitation.

So sorry, if I'm incorrect! Good luck with your assessment :)

10) Draw Bohr Diagrams For The Following. Make sure you show the correct number of protons and neutrons found in the nucleus.

Answers

Answer:

the no.of protons in k is 19 and no.of neutrons is 20.

THE NUMBER OF PROTONS IN AL IS 13 AND NO.OF NEUTRONS IS 14

THE NUMBER OF PROTONS IN BORON IS 5 AND NO.OF PROTONS IS 6

THE NUMBER OF PROTONS IN LI IS 3 AND NO.OF NEUTRONS IS 4

Please help me por favor :'(

Answers

More volume, takes longer to heat all the molecules.

Which components of a galaxy move in circular patterns or revolve around a star?
A . dust
B . Gas
C . Other orbiting object
D . sun

Answers

Answer:

Explanation:

It's becase of the gavitational pull of a star or sun

The answer is c I hope that helps

In the following images, a blue circle represents an atom of one type of element, and a red square represents an atom of a second type of element. Determine which of them represent a pure substance, a homogenous mixture, and a heterogeneous mixture.
Are these in the right order?

Answers

Answer: No they are not. "Pure substance" is supposed to be placed in the middle picture. "Homogenous mixture" is supposed to be placed in the right picture. "Heterogenous mixture" is supposed to be placed in the left picture.

Explanation:

Pure Substances:

There are two categories of pure substances: elements and compounds (In our case, we have a compound).

Element (e.g. the blue circles or the red squares):

An element is a fundamental substance.An element cannot become simpler than itself, even if chemical separation methods are used.

Compound (e.g. the blue circles bonded together with the red squares in the middle picture):

A compound is a substance made of two or more elements in fixed proportions (i.e. One element has the same amount as the other).A compound can be made into individual elements or simpler substances using chemical methods of separation.

Mixtures:

There are two categories of mixtures: homo- and hetero- genous.

Homogenous mixture:

The substances or elements are mixed to look like one single substance and cannot be told apart (e.g. When salt dissolves in water, the water still looks like water).The substances or elements are distributed evenly throughout the apparatus. The number of different types of substances or elements can vary (e.g. There is more water than salt) The substances or elements do not bond together.

Heterogenous mixture:

The substances or elements are mixed and can be told apart (e.g. When oil is mixed with water, the oil is "water-hating" so it forms its own layer on the bottom, while the water forms another layer on top of the oil layer).The substances or elements are distributed where one type of substance or element is bunched up in one spot and another substance or element in another spot.The number of different types of substances or elements can vary.The substances or elements do not bond together

The second Image is not a homogenous mixture, it is a heterogenous mixture as two different types of elements are mixed together.

The mix of two different types of elements in the heterogenous mixture is not uniform and has uneven mixed types.

The third image is a homogenous mixture as even though two different types of elements are together, they are not mixed with each other.

Unlike in the heterogenous mixture, in a homogenous mixture, there is a uniform mix of two different types of elements.

The first image is correct, the image depicts a pure substance.

To understand better about the Substances:

https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Foundations_of_Introductory_College_Chemistry/04%3A_Matter/3.5%3A_Pure_Substances_and_Mixtures

what are the function of a objective lens and the ocular lenses

Answers

Answer:

Explanation:

The objective lens gather light from the specimen, magnifies the image of the specimen and projects the magnified image into the body tube. The ocular lens magnifies the image. It contains a measuring scale called a ocular micrometer.

the ocular lends magnifies so you can better see the specimen

please help i need some help with this one plz :)

Answers

Answer:

in some animal they changes their body temperature according to the environment temperature. so are called cold blooded animals.they change their temperature for adaptation.

environment has a strong influence on farm animals with air temperature having the primary effect, but altered by wind, precipitation, humidity, and radiation. Ideally, the impact of the thermal environment can be described in terms of effective ambient temperature (eat), which combines the various climatic events. Animals compensate within limits for variations in eat by altering food intake, metabolism, and heat dissipation, which in turn alter the partition of dietary energy by the animal.

Don’t copy word for word so change things up a bit

I need help aging my guy UwU

Answers

I need points but I hope you have a nice day and an UwU to you too!

Answer: C and B I think

Order the terms according to the path followed by oxygen during cellular respiration.

Answers

Order the terms according to the path

The respiration which is seen in plants and higher animals including humans take place in the presence of oxygen.

What is respiration?

The process in which the cells of an organism obtain energy by the combination of oxygen and glucose and results in the release of carbon dioxide, water and ATP (energy) is defined as the respiration.

In respiration, the transfer of oxygen occurs from outside environment to cells within the tissues. It is a biological reaction which takes place inside the cells of living organisms. The energy molecule ATP ( Adenosine triphosphate) is created during this process.

The ATP molecule produced here by the breakdown of glucose is utilized by the cells to perform various activities. The first step in cellular respiration is glycolysis which occurs in cytoplasm.

The correct path of oxygen transfer is:

Nostrils → Nasal cavity → Pharynx → Trachea → Bronchi → Bronchiole → Alveoli

To know more about respiration, visit;

https://brainly.com/question/29760658

#SPJ6

Which of these phrases would go in the overlap? Select two options.

Answers

I think it’s found in the nucleus and has a mass of one amu

Yes they are correct

Calculate the volume (in cm3
) of 54 g
of water at 1 ∘C
.
Express the volume in cubic centimeters to two significant figures.

Answers

157,464 I think this is the answer

since the density of water is 1, then 1g = 1cm^3. So the volume of 54g of water is 54cm^3 with 2 significant figures

What is the difference between a saturated solution and an unsaturated solution?

Answers

yea the other person is right

A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved, where as an unsaturated solution is a solution that contains less then the maximum amount of solute that is capable of being dissolved:)

What is common among elements in the same group?

Answers

Answer:elements are arranged in increasing atomic number from left to right

Explanation:

Answer:elements are arranged in increasing
atomic number from left to right

True or False: Concrete has only positive qualities, and there are no disadvantages to using it.
PLEASE HELP

Answers

false because a disadvantage of concrete would be that It has low tensile strength and hence cracks are developed.

How to work out the relative mass of potassium? What is the calculation? ( explained very easily )

Answers

Answer:

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Relative Atomic Mass = Mass of one atom
———————————
(1/12)th Mass of one C12 atom

Which human action would most likely increase the nutrients in an ecosystem?
A.building a rock wall
B.fertilizing a cornfield
C.watering a flower bed
D.pulling weeds from a garden

Answers

Fertilizing a cornfield so letter b is your answer

Which of the following is true about extinction? A. Only one extinction has occurred during the Earth's history. B. Plant species can become extinct, but animal species cannot. C. Extinctions have occurred many times throughout the Earth's history. D. Animal species can become extinct, but plant species cannot.

Answers

Answer:

C. Extinctions have occurred many times throughout the Earth's history.

Explanation:

C.exstinctions have occurred many times

When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

Answers

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s