Answers
Answer:
3. 0.819L (819 mL)
Explanation: Before we go about solving this, we need to do some conversions prior to using the gas law, the gas law is as follows...
P(atm)*V(L)=n(mol)*r(constant)*T(in kelvin)
So here are all the conversions you need.
620 mm Hg -> 0.816 atm
1140 mL -> 1.14 L
37 C -> 310.15 K
After plugging in our new converted values, we will proceed to solve the number of moles of the gas present, our n value, so our equation will look like this...(Note: Constant r in this case is 0.08206 L*atm/K*mol)
(0.816 atm)(1.14 L) = n(0.08206)(310.15)
Solving for n we get 0.03653 moles.
Now our second part is to figure out the volume AT STP (standard temperature/pressure). In the STP conditions, your temperature defaults to 0 C (273.15 K) and 1 atm. Now there is an easier way to do this, but I'll also show the more comprehensive way. Here is the easier method...
Since 1 mole of every gas occupies 22.4 L at STP, we can simply multiply this by our number of moles. So (22.4L)(0.3653 mol) to give us 0.818272.
However, a more accurate answer can be given like this...
Plugging n back into the same equation and this time resetting pressure to 1 atm and temperature to 273.15 K and conserving our number of moles we get...
(1 atm)(v) = (0.03653 mol)(0.08206)(273.15 K)
v = (0.03653)(0.08206)(273.15)
v = 0.8188 L = 0.819 L or 819 mL
Related Questions
what are two factors that affect the boiling point of water
Answers
Answer:
purity and pressure affects boiling point
Finding dead insects or mouse droppings in the kitchen indicates which of the following: Pest infestation Chemical contamination Food spoilage Cross contamination
Answers
Finding dead insects or mouse droppings in the kitchen is an indication of pest infestation.
Pests are living organisms that are capable of spreading diseases, causing economic damages, or generally constituting nuisance to the environment.
Pest infestation occurs when there is a high number of pests in the environment. When this occurs, their activities are felt in the environment in terms of causing a nuisance, and damaging properties or contaminating foods.
More on pest infestation can be found here: https://brainly.com/question/13483095
(20 points) In the morning, you decide to make toasted bacon, lettuce, and tomato sandwich. Observe what happens in each stage of making the sandwich. Which parts involve only chemical changes happening?
I. The first thing you do is cut two slices of bread.
II. Then you put the slices in the toaster to cook. When the toaster is done, it pops the III. warm brown toast. You cook the bacon in a frying pan you put bacon, lettuce, and tomato on the bread, trimming the sides.
IV. You can smell the old bread in the garbage going moldy.
Steps I and II
Steps II and III
Steps II and IV
Steps III and IV
Answers
Answer:
C is the answer I did it and got it right
hello guyz who ever answers will get 100 pts
Answers
Answer:
hello,
Good morning have a good day
Here’s a question ?
help! giving brainliest
Answers
Answer:
sorry wala din akong sagot niyan sorry talaga
find the answer
science
Answers
Answer:
Transparent- air,water,sheet of plane glass,
Opaque- piece of rock,sheet of aluminium,mirror,wooden board,CD,umbrella,wall,sheet of carbon paper,sheet of cardboard
Translucent-sheet of polythene,sheet of cellophane,smoke,fog,wire
●Luminous- iron,lighted fluorescent tube,flame of gas burner, lighted torch,kerosene stove,sun,firefly
Non Luminous- water,air,rock,sheet of polythene,sheet of aluminium,mirror,wooden board,sheet of polythene,CD,smoke,sheet of plane glass,fog,wall,umbrela,sheet of carbon paper,cardboard sheet,cellophane sheet,wire,moon.
BRAINLIST PLS
Which of the following subject areas contains questions that can be answered by science?
O Astronomy
O Alchemy
O Ethics
O Religion
Answers
Answer:
A
Explanation:
K took the test
Astronomy subject areas contains questions that can be answered by science. Thus option A is correct.
What is Astronomy?The science deals with extraterrestrial objects and phenomena, that is everything in our universe beyond the atmosphere of our planet.
This science is more observational than experimental. Astronomy can be up two types such as observational astronomy and theoretical astronomy.
Now a day, the field of astronomy has been expanded enormously in different field of subjects like astrometry, planetary astronomy, astrophysics, astrobiology, astrochemistry, etc.
The field of astrophysics is used understand the nature of celestial objects and their physical processes involve in the formation and emission of radiation.
Other research application include the chemical composition of stars, study of nuclear reactions to know the details about the the radiation energy release from stars.
Thus, Option A is correct.
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Argon (Ar): [Ne]3s23p6 core electrons valence electrons
Answers
Answer:
1. The core electrons are 10
2. The valence electrons are 8
Explaination:
Core electrons are electrons located in the inner shells of and atom.
Valence electrons are electrons located on the outermost shell of an atom
From the question given above, we obtained:
Ar (18) => [Ne] 3s²3p⁶
Recall
Ne (10) => 1s² 2s²2p⁶
Therefore,
Ar (18) => [1s² 2s²2p⁶] 3s²3p⁶
From the above illustration,
Inner shell (core shell) => 1s² 2s²2p⁶
Outermost shell (valence shell) => 3s²3p⁶
1. Determination of the core electrons
Inner shell (core shell) => 1s² 2s²2p⁶
Core electrons = 2 + 2 + 6
Core electrons = 10
2. Determination of the valence electrons
Outermost shell (valence shell) => 3s²3p⁶
Valence electron = 2 + 6
Valence electron = 8
Answer:
10 core electrons
8 valence electrons
Explanation:
Identify whether the following changes would generally increase or decrease the reaction rate. (3 points)
• Increasing the concentrations of reactants (0.5 point):
• Increasing the temperature (0.5 point):
• Increasing the pressure (0.5 point):
• Shining light on the reaction (0.5 point):
• Increasing the activation energy (0.5 point):
Answers
Answer: (1) increase(2) increase (3) increase (4) increases(5) decrease
Explanation:so basically anything you do will make the reaction go faster except like increasing the activation energy for example
The correct answers are as follows
Increase Increase Increase Increase DecreaseWhat is Reaction rate?It is the measure of the change in concentration of the reactants or the change in concentration of the products per unit time.The speed of a chemical reaction is the change in concentration of a substance divided by the time interval during which this change is observed.
What will happen to reaction rate if we do the following?The reaction rate will increase on Increasing the concentrations of reactants.The reaction rate will increase on Increasing the temperature. The reaction rate will increase on Increasing the pressure.The reaction rate will increase on Shining light on the reaction.The reaction rate will decrease on Increasing the activation energy .
Hence Except Activation energy the reaction rate will increase
Learn more about reaction rate below.
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Why is the speed of sound more in solids than in gases ?......
Answers
Explanation:
Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.
Sound waves move faster in solids where the particles are compacted than in gases where the molecules are far apart from each other.
We know that the particles in a solid are held together by strong intermolecular forces while the particles in a gas are not held together by intermolecular forces.Since sound waves are transmitted as vibrations, sound waves move faster in solids where the particles are compacted than in gases where the molecules are far apart from each other.Hence, sound moves faster in a solid than in gases.
Learn more about speed of sound: https://brainly.com/question/15381147
What’s the frequency of radiation that has a wavelength of 13 um, about the size of bacterium?
Answers
Answer:
2.3)X10^13-Hz
Explanation:
What’s the frequency of radiation that has a wavelength of 13 um, about the size of bacterium?
a micro meter is 10^-6 meter
frequency of light times wavelength = c the speed of light 3X10^8 M/sec
so
frequency times 13 X10^-6 =3X10^8 M/
so
FR3EQUENCY = 3X10^8/13X10-6
=(30/13)10^13 =2.3)X10^13-Hz
7 X
6
the atomic number of magnsium is 12 this means that that its nucleus must contain
Answers
Explanation:
Since magnesium has an atomic number of 12, that means that it has 12 protons and 12 electrons when it is in normal state.
Answer:
12 protons
Explanation:
How much Ba(OH)2, in grams, is needed to make a 1.00m aqueous solution?
Answers
Answer:
We can say that we need 171 g barium hydroxide needed to make one model equals solution.
Explanation:
I hope this answered your question.
Calculate the freezing point of a solution of 3.46 g of a compound, X, in 160 g of benzene. When a separate sample of X was vaporised, its density was found to be 3.27 g/Lat 116°C and 773 torr. The freezing point of pure benzene is 5.45°C, and Kis 5.12°C kg/mol.
Answers
Answer:
Calculate the freezing point of a solution of 3.46 g of a compound,X,in 160 g of benzene. When separate sample of X was vaporised, its density was found 3.27 g/L at 116 c and 773 torr. The freezing point of pure benzen is 5.45 c, and kf is 5 .12 c/m.
Explanation:
First determine molar mass from
P*molar mass = density*R*T
Solve for molar mass. Then
moles = grams/molar mass
Solve for moles
molality = moles/kg solvent
Solve for molality
delta T = Kf*m
Solve for delta T, then convert to freezing point
A very long tube with a cross-sectional area of 1.00 cm2 is filled with mercury to a height of 76.0 cm. At what height would water stand in this tube if it were filled with a mass of water equal to that of the mercury? (The density of mercury is 13.60 g/cm3 and the density of water is 1.00 g/cm3.)
Answers
The water would stand at a height of 1033.6 cm
If the mass of the mercury, m equals the mass of the water, m' at its height,h', then the weight of the mercury W equals the weight of the water, W'
So, W = W'
mg = m'g
ρV = ρ'V' where ρ = density of mercury = 13.60 g/cm³, V = volume of mercury = Ah where A = cross-sectional area of tube = 1.00 cm and h = height of mercury = 76.0 cm, ρ' = density of water = 1.00 g/cm³, V = volume of water = Ah' where A = cross-sectional area of tube = 1.00 cm and h' = height of water.
So, ρV = ρ'V'
ρAh = ρ'Ah'
h' = ρAh/ρ'A
h' = ρh/ρ'
Substituting the values of the variables into the equation, we have
h' = ρh/ρ'
h' = 13.60 g/cm³ × 76.0 cm/1.00 g/cm³
h' = 13.60 × 76.0 cm
h' = 1033.6 cm
So, the water would stand at a height of 1033.6 cm
Learn more about water height here:
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The weight of a piece of a cubic foot wood is 40lbs. It is thrown into a pool of
water. What is the weight of the water displaced?
Answers
Answer:
Volume of wood = 1 ft3 Mass of wood (m) = 40 lbs = 18.1437 kg Let the volume of water displaced be V. Density of water (ρ
Explanation:
Calculate the number of carbon dioxide (CO2) molecules produced in the
reaction if 0.7525 moles of oxygen gas (O2) are consumed.
Answers
Answer:
4.530 X 10^23 MOLECULES OF CO2
Explanation:
Calculate the number of carbon dioxide (CO2) molecules produced in the
reaction if 0.7525 moles of oxygen gas (O2) are consumed
so
C + O2-----------CO2
1 MOLE OF 02 produces 1 mole of CO2
so
0.7525 moles O2 produce 0.7525 moles
1 mole is 6.02 X 10^23
so
0.7525 moles is 0.7525 X 6.02 X 10^23 -
=
4.530 X 10^23 MOLECULES OF CO2
Bio fuel is a mixture of petrol and 20%——————
Answers
Answer:
methane and petrol okkkkkkkkkkkkkkkkkkk
What is a peninsula?
Answers
Answer:
A peninsula ( Latin: paeninsula from paene "almost" and insula "island") is a landform surrounded by water on most of its border while being connected to a mainland from which it extends.
Explanation:
CAN I GET BRAINLIEST
Imagine that scientists have just discovered a non-bird dinosaur skeleton. They want to know whether the dinosaur was closely related to birds. What features in ...
might help them decide?
Answers
Answer:
This evidence includes fossilized bones, teeth, eggs, footprints, teeth marks, and even dung. When paleontologists compare a skeleton of a living bird to the fossilized skeleton of a non-bird theropod, like Sinornithosaurus, they see many similarities.
Explanation:
Answer:
When people think of dinosaurs, two types generally come to mind. There were the huge herbivores,
like Apatosaurus, with their small heads and long tails. There were also those fearsome carnivores,
like Tyrannosaurus rex, that walked on two legs and had a mouthful of teeth like kitchen knives.
Living Dinosaurs
These large dinosaurs are no longer around, but dinosaurs still live among us today. They are the
birds. It's difficult to imagine that a bird on your window sill and a T. rex have anything in common.
One weighs less than a pound. The other was the size of a school bus, tipping the scales at eight
tons. But for all their differences, the two are more similar than you might think. In fact, birds and T.
rex are close relatives. They all belong to a group of dinosaurs called theropods.
This is a cladogram, a "" showing the relationships among organisms. The group called dinosaurs includes the extinct dinosaurs
and all their living descendants. All its members, including living birds, descended from the very first dinosaur-their common ancestor.
That's why birds are a kind of dinosaur (just as humans are a kind of primate).
Skeletal Evidence
When paleontologists compare a skeleton of a living bird to the
fossilized skeleton of a non-bird theropod, like Sinornithosaurus,
they see many similarities. They both have a hole in the hipbone, a
feature that distinguishes most dinosaurs from all other animals.
This feature allows an animal to stand erect, with its legs directly
beneath its body. All theropod dinosaurs, including birds, have a
furcula, also known as a wishbone. Another shared characteristic is the presence of hollow bones.
Hollow bones reduce the weight carried by an animal. This feature enables the animal to run faster. It
probably also played a role in the evolution of flight.
thought to have evolved for flight. The discovery of more and more non-flying dinosaurs with feathers
disproved that explanation. For these dinosaurs, feathers may have served other functions, like
gliding, insulation, protection, and display. Feathers play that same role in many bird species today.
Based on the evidence of shared characteristics, scientists have concluded that birds are a type of
Birds are the only dinosaurs with the ability to fly. This is
very interesting to scientists who want to know when the
capability of flight emerged. To find out, some scientists
study the brains of bird and non-bird dinosaurs. Soft
tissue, such as brains, is almost never preserved in the
fossil record. What is preserved is the imprint the brain
left on the inside of the skull. Now scientists are using
computed tomography (CT) scanners to create
endocasts. These are detailed, three-dimensional
reconstructions of the interiors of fossilized skulls.
In a recent study, researchers were able to peer inside
the braincases of more than two dozen specimens.
"Technology allows us to look inside these specimens
without destroying them," says Dr. Amy Balanoff, a
Museum research associate. "It's a non-destructive way
to basically slice up a dinosaur brain. We look inside and see what it can tell us about the evolution of
the brain within dinosaurs. Most of us grew up thinking that dinosaurs had tiny brains, but actually
some had really big brains."
The endocasts allow Balanoff and other researchers to
explore the outer shape of the brain in more detail. In
addition, the casts also provide new information about
the volume and shape of different regions of the brain.
For example, scientists looked at a detailed view of the
dinosaur cerebrum, a region of the brain related to
cognition and coordination. They found that this region
was very large in non-bird dinosaurs closely related to
birds. Dr. Balanoff's research suggests that these
dinosaurs developed big brains long before flight and that
these bigger brains prepared the way for them to fly.
When examining skeletal, behavioral, and brain
evidence, scientists see that birds and non-bird dinosaurs
share many features. This helped them conclude that
dinosaurs aren't extinct after all. They're living among us today.
(Im a really fast Typer and Thinker)
Have a nice day
Under what condition will the result of an experiment based on a hypothesis most likely lead to a new experimentation?
Answers
Answer:
When the results do not match the experimenter's predictions.
13500 mL convert to milliliters of mercury
Answers
Answer:
5.627 × 1019 milliliters
Explanation:
is this what you wanted?
leopard has canine teeth because
Answers
Explanation:
Leopards have 32 teeth, 4 of which are long, pointed canine teeth. Canine teeth are used to kill prey. Other teeth are for cutting flesh and grinding bone
help me. correct answer will be marked as brnlst
Answers
Answer:
PCI3
Explanation:
It does not obey the octet rule on the nitrogen atom.
SUPPER EASY WILL GIVE BRAINLIEST NEED HELP ASAP
7. Which
pocess is an example of a chemical
change?
A. Salt mixes with water and
dissolves.
B. An aspirin tablet is crushed into a fine
powder.
C. Water droplets form on the outside of a
cold drink glass.
D. An antacid tablet is added to water and
bubbles are produced.
Answers
Answer:
Your answer will be (D).
Hope this helps!
Answer:
D
Explanation:
You can tell when a chemical change occurs if a gas is produced (bubbles), an odor is produced, if there is a color change, or if the surroundings get hotter or colder.
Seratonin is a neurotransmitter. The ratio of C atoms to N atoms is____
Answers
Answer:
5:1
Explanation:
The molecular formula of serotonin is C10H12N2O. Therefore, the ratio of C atoms to N atoms is 5:1, because you divide 10 and 2 by 2, and then you get 5:1.
Help with this please :) will mark Brainlyist if right
Answers
Answer:
3
Explanation:
Someone help pls this is due today
Answers
Answer:
arrow down is gravity
Explanation:
Answer: The person above me is right
Explanation:
Have a Great day!
If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at constant temperature. What is the new volume?
Answers
Before
P1 : 748 mmHg
V1 : 22.5 L
After
P2 : 725 mmHg
V2 : ?
748 mmHg / 22.5 L = 725 mmHg / V2
Cross Multiply...
748 mmHgV2 = 16312.5 mmHgL
748 mmHgV2 / 748 mmHg = 16312.5 mmHgL / 748 mmHg
V2 = 21.808155 L
V2 = 21.8 L (sig figs)
Hey! Help please :)
Answers
Answer:
6. 15 oxygen atoms (The coefficient 5 is multiplied by the subscript 3 of oxygen)
7. The number "2" is the subscript.