Answer: 8.31
Explanation: they told me it was correct
The value of R for 4.00 moles of an ideal gas at 25°C, 100L of volume and pressure of 99.1 kPa is 99.1 kPa.L / mol.°C.
What is ideal gas equation?Ideal gas equation is a hypothesis which tells about the behavior of gas at different conditions and it is represented as:
PV = nRT, where
P = pressure of ideal gas = 99.1 kPa
V = volume of ideal gas = 100 L
n = moles of ideal gas = 4 moles
T = temperature ideal gas = 25 °C
R = universal gas constant = ?
On putting these values on the above equation, we get
R = (99.1)(100) / (4)(25)
R = 99.1 kPa.L / mol.°C
Hence value of R for ideal gas is 99.1 kPa.L / mol.°C.
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1.what PROCESS describes the water moving through a membrane?
2.water flows across a cell membrane from where it is-
Answer:
Osmosis is the process that describes water moving through a membrane.
I am not sure about the second question.
Explanation:
The crystal lattice is a three-dimensional structure.
O True
O False
Answer:
True
Three-Dimensional Lattice
The unique arrangement of atoms or molecules within a crystalline solid is referred to as the crystal structure of that material. ... The crystal lattice represents the three-dimensional structure of the crystal's atomic/molecular components.
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How do S waves move through the earth?
A. S waves move the fastest
B. S waves move parallel to the force applied
C. S waves move perpendicular to the force applied
D. S waves move in every possible direction
Answer:
I believe that its B
Explanation:
google lol
If the wavelength of light will cause electrons to be removed from the metal (creating the photoelectric effect). What is the effect of doubling the photon flux of light?
Answer:
The number of photoelectrons are increased
Explanation:
According to Albert Einstein, when light falls on a clean metal surface, electrons are ejected from the clean metal surface. This is known as photo electric effect.
The kinetic energy of the emitted photoelectron depends on the energy of the incident photon and the work function of the metal. If the energy of the incident photon is less than the work function of the metal, photoelectric effect does not occur.
Below a given threshold frequency or wavelength called the threshold frequency or threshold wavelength photoelectric effect does not occur.
However, doubling the photon flux of light doubles the intensity of the light. This only leads to increase in the number of photons and have nothing to do with the energy of the emitted photoelectrons.
What is the term for what happens when light travels from one medium to another?
Answer:
is there any answer choices????
Answer:
The answer is Refraction
Which type of of star cluster is loose and disorganized? A. binary B. eclipse C. globular or D. open.
Answer:
Open cluster
Explanation:
Why should I explain?
Answer: D open cluster
Explanation:
Predict the missing particle or nuclide.
239 Np -> 239 Pu + ?
93 94
Select one:
a. alpha emission
b. beta migus emission
c. positron emission
Answer:
beta minus emission
Explanation:
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
²³⁹₉₃Np→ ²³⁹₉₄Pu + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
HELP!! An unknown solution has a pH reading of 8.4. Which statement is true about this solution?
A. The solution is a strong acid.
B. The solution is a strong base.
C. The solution is a weak acid.
D. The solution is a weak base.
Answer:
D- a weak base
Explanation:
The ph scale goes from 1-10 a solution over 7ph is classified as basic. A solution thats 8.4 is only 1.4 over 7pH, making it a weak basic solution. An example of a strong base would be a solution with a pH of 9.2 (for example).
Answer:
D.) The solution is a weak base
Explanation:
I got it correct on founders education
Temperature is a(n)
ecosystem.
component of an ecosystem.
Answer:
Temperature is an abiotic component of an ecosystem
Explanation:
Which diagram demonstrates active transport?
a. A
b. B
C.
C
d. None of the above
Answer:
c
Explanation:
Diagram C represents active transport which is a type of facilitated diffusion.
What is diffusion?
Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.
There are 2 main types of diffusion:
1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.
2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.
There are 2 types of facilitated diffusion one is osmosis and dialysis.
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is this Ionic, Covalent, or Metallic?
Answer:
Covalent
General Formulas and Concepts:
Chemistry - Compounds
Ionic Bonds - Forming between a metal and nonmetal Covalent Bonds - Forming between 2 nonmetals Metallic Bonds - Forming between 2 metalsExplanation:
Step 1: Define
NCl₃ - Nitrogen Trichloride
Step 2: Identify
Nitrogen is a nonmetal
Chlorine is a Halogen Gas
Step 3: Confirm
Nitrogen and the 3 Chlorines will have to share electrons and form a Covalent bond.
Answer:
The bond is ionic.
Explanation:
If a nonmetal and a metal bond, it's known as a characteristic of an ionic bond.
The answer above is false, Google "Is nitrogen trichloride an ionic compound" in order to find out why.
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which of the following is a property of a pure substance
Answer:
something with one particle/atom
Explanation:
what material is a pure substsane
Answer:
salt, sugar, and so on.
Explanation:
A pure substance is a material that has a constant composition, and has the same properties throughout the sample. pure substances in chemical equations form predictable products. In chemistry, a pure substance has only one type of atom , molecule, or compound.
What is the atomic number for 1s2,2s2,2p6,3s1
Answer: the atomic number is 11
Explanation: using a electron configuration chart you can see that 3s1 stops on Na which is 11 on the table
True or false Different types of atoms can bond together to make molecules
Answer:
true
Explanation:
because if you really take a moment to think about it atoms are made of molecules.
calculate the chemical amount of ammonia present in a 11.22g sample of the compound
Answer:
3.97 x 10²³atoms
Explanation:
Given parameters:
Mass of ammonia = 11.22g
Unknown:
Chemical amount of ammonia present = ?
Solution:
The chemical amount present in a substance is the number of atoms it contains.
To solve this problem, from the given mass find the number of moles first.
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of NH₃ = 14 + 3(1) = 17g/mol
Number of moles = [tex]\frac{11.22}{17}[/tex] = 0.66mole
1 mole of any substance contains 6.02 x 10²³ atoms
0.66 mole of ammonia will contain 0.66 x 6.02 x 10²³ atoms
= 3.97 x 10²³atoms
The air around the equator has a high temperature, so it has a _______ air pressure. *
Explanation:
The air around the equator has a high temperature, so it has a _lower_____ air pressure
Dalton incorporated the law of conservation of mass into his atomic theory by asserting that
Answer:
a. atoms are indivisible. ... atoms can not be destroyed in chemical reactions.
Explanation:
Hope this helped :D
Witch type of force is a contact force
A-strong nuclear force
B-gravity
C-friction
D-electromagnetic force
Answer: D
Explanation:
Answer:
C. Friction
Explanation:
Because friction needs contact to occur, the other forces do not require contact like friction does.
_________are horizontal rows on the Periodic Table.
Help me is due tomorrow
Please help ASAP
Calculate the acceleration of this object. Remember, acceleration = net force / mass
Question 4 options:
1.7 m/s2
17,000 m/s2
2.3 m/s2
2 m/s2
Answer:
I’ll put the answer the comments if you can give the actual question
Explanation:
How can you find out what substances
Answer: Melting or boiling
Explanation:
Melting or boiling point is another property that scientists can use to identify a substance. Melting point is the temperature at which a substance changes from solid → liquid. Boiling point is the temperature at which a substance changes from liquid → gas.
Fruit fly cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have how many chromosomes? Explain your answer.
After mitosis, it is expected that the daughter cells of a fruit fly with 8 chromosomes should have 8 chromosomes.
MITOSIS:
Mitosis is the kind of cell division in which a single cell produces two daughter cells that are genetically identical to the parent cell. Mitosis results in daughter cells that possess the same number of chromosomes as the parent cell, hence, it is called duplication division. This means that mitotic division maintains the chromosome number of parents in the daughter cells. For example, a fruit fly with 8 chromosomes will produce daughter cells with 8 chromosomes each. Therefore, after mitosis, it is expected that the daughter cells of a fruit fly with 8 chromosomes should have 8 chromosomes.Learn more at: https://brainly.com/question/3327479?referrer=searchResults
The net force on a vehicle that is accelerating at a rate of 1.5 m/s2 is 1,800 newton's. What is the mass of the vehicle to the nearest kilogram?
Answer:
1200 kgExplanation:
The mass of the vehicle can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{1800}{1.5} \\ [/tex]
We have the final answer as
1200 kgHope this helps you
hEEEYYYY peeps! this is the same related question about another scientist with the cells, so yeaaaaaah...btw meh teacher also made dis as well:>
Answer:
im pretty sure it is D
Explanation:
this is an old term for a microscopic organisms that included bacteria, protozoans, and very small animals
true or false an object's weight is a force that depends on gravity
Answer:
True
I studied science physics pls mark me brainliest thanks
Answer:
true
Explanation:
Weight is calculated accounting for gravity, which is why a person weighs less on the moon than on Earth.
HTH :)
What type of elements make up ionic bonds?
Ionic bonds are formed between ionic compounds, Ionic compounds are formed when metals join with nonmetals.
What are ionic bonds?Ionic bonds are electrostatic bonds that are formed between metals and nonmetals. It is an electrostatic attraction between oppositely charged ions in a chemical compound.
These bonds are formed when two or more atoms lose or gain electrons. An example of ionic bonds can be seen in the NaCl compound.
Na⁺ + Cl⁻ = Na⁺Cl⁻
NaCl is formed by the joining of oppositely charged elements. They constitute salt. Salt is made up of ionic compounds, so it easily dissociates into sodium and chloride when mixed in water.
Thus, ionic compounds are created when metals combine with nonmetals, and these combinations result in the formation of ionic bonds.
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Choose all the correct answers.
The Jovian planets include:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Choose all the correct answers.
The terrestrial planets include:
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Answer both please
4. Describe the landforms created at a subducting plate boundary and those created
at a convergent plate boundary between two continental plates. Explain why the
landforms are different.
Answer:Plate Tectonics : Different Plate Boundaries Create Different Landforms and ... Plate Boundary: CONVERGENT ... As the MORE DENSE oceanic plate (OP) subducts under ... Illustration of what is happening ... Two continental plates (CP) move away from each other ... Sea Floor spreading occurs at these mid-ocean ridges.
Explanation:
The landforms created in the subducting plate boundary are mid ocean ridges, fold mountains and islands. Volcanoes and earth quakes are common in these regions.
What is convergent boundary?Plate boundaries are regions of intersections between two tectonic plates. There are three different type of plate boundaries, namely convergent boundaries, divergent boundaries and transform boundaries.
In convergent plate boundaries, two tectonic plates moves close to each other and converge. These plate boundaries gives rise to different types of land forms such as fold mountains, islands etc.
Earthquakes and volcanoes are common in convergent plate boundaries. These type of plate movement is caused by the convection currents in the mantle.
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Which of the following best describes the difference between the mass of a balloon and the mass of a bowling ball?
Answer:
Explanation:m
At 1 atm and 300 K, this gives n/V = 0.0406 mol/l. For air, which has a molar mass of 29.0 g/mol, this gives a density of 1.18 g/l. Helium, which has a mass of 4.00 g/mol, has a density of 0.164 g/l. Thus, a one-liter balloon of helium can lift a mass of (1.18-0.164) = 1.02 g. In science, the standard unit of mass is the kilogram (kg). A bowling ball has a mass of about 5 kilograms. Bowling ball weights range from 6 lbs. To 16 lbs. in most cases males will use weights ranging between 12 lbs. and 16 lbs. You might calculate volume using the sphere's radius, circumference or diameter. You can also submerge the sphere in water to find its volume by displacement. Once you know the volume, you can multiply by the density to find the mass.
Hope That Helps