Answer:
1.0atm is partial pressure of Ne
Explanation:
Partial pressure of a gas is mole fraction times total pressure. To find mole fraction of Ne we need to convert mass of Ne and Ar to moles using the molar mass of each atom and with the formula:
Mole fraction Ne = Moles Ne / (Moles Ne + Moles Ar)
We can solve for mole fraction of Ne and its partial pressure:
Moles Ne -molar mass: 20.1797g/mol-:
10.0g * (1mol / 20.1797g) = 0.496 moles of Ne
Moles Ar -Molar mass: 39.948g/mol-:
10.0g * (1mol / 39.948g) = 0.250 moles of Ar
Mole fraction of Ne:
0.496 moles Ne / (0.496moles + 0.250moles) = 0.665
Partial pressure Ne:
1.6atm * 0.665 =
1.0atm is partial pressure of Ne
How many atoms of cadmium are in 2.50 moles
of cadmium?
2.50 moles Cd x
6.022 x 1023 atoms Cd
1 mol Cd
1 mole is equal to 6.023 × 10 ²³ molecules. 15.05 × 10²³ atoms of cadmium are in 2.50 moles of cadmium.
What do you mean by mole ?The term mole is defined as the amount of substance of a system which contains as many elementary entities.
One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.
The mole concept can be used to convert between mass and number of particles.
1 mole of any substance = 6.023 × 10²³ molecules
Therefore, 1 mole of cadmium = 6.023 × 10²³ molecules
Then 2.50 moles of cadmium = 2.50 × 6.023 × 10²³
= 15.05 × 10²³ molecules
Thus, 15.05 × 10²³ atoms of cadmium are in 2.50 moles of cadmium.
To learn more about the mole, follow the link;
https://brainly.com/question/26416088
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What is magnetism?
O a property of all rocks
O a property of all metals
O the force of attraction or
repulsion of magnetic materials
O a force that depends on mass and distance
Explanation:
I think it's the third one but I'm not sure
Answer:
The Answer for this is C
Select the correct definition below for the vocabulary term Oxygen
Answer:
Explanation:
We should be offered choices since you were offered some. However I will take a chance on what you should answer.
Oxygen is a non metal. Its most common charge is -2 which means that it has taken on two electrons. It is associated with fire and is an oxidizing agent which is a substance that will take on electrons). It is very reactive.
8. Which is correct about kinetic energy?
As the kinetic energy increases gas molecules move slower
B. As the kinetic energy increases, the temperature of the gas increases
C. As the kinetic energy decreases, gas molecules move faster
D. As the kinetic energy decreases, the temperature of the gas increases
Answer:
is B
Explanation:
Joseph puts a piece of toast on a plate. The toast is hot from the toaster. When he puts the toast on the plate, the energy of the plate increases. What must be true of the energy of the toast?
Answer:Its energy stays the same while the energy of the plate increases.
Explanation:
Use calc to determine whether it is possible to remove 99.99% Cu2 by converting it to Cu(s) in a solution mixture containing 0.12 Cu2 and 0.12 MSn2 suppose it is at room temperature.
Answer:
it is possible to remove 99.99% Cu2 by converting it to Cu(s)
Explanation:
So, from the question/problem above we are given the following ionic or REDOX equations of reactions;
Cu2+ + 2e- <--------------------------------------------------------------> Cu (s) Eo= 0.339 V
Sn2+ + 2e- <---------------------------------------------------------------> Sn (s) Eo= -0.141 V
In order to convert 99.99% Cu2 into Cu(s), the equation of reaction given below is needed:
Cu²⁺ + Sn ----------------------------------------------------------------------------> Cu + Sn²⁺.
Therefore, E°[overall] = 0.339 - [-0.141] = 0.48 V.
Therefore, the change in Gibbs' free energy, ΔG° = - nFE°. Where E° = O.48V, n= 2 and F = 96500 C.
Thus, ΔG° = - 92640.
This is less than zero[0]. Therefore, it is possible to remove 99.99% Cu2 by converting it to Cu(s) because the reaction is a spontaneous reaction.
How many formula units are 113.5 grams of Ca(OH)2
Answer:
Molecular Formula Ca(OH)2 or CaH2O2
Synonyms CALCIUM HYDROXIDE 1305-62-0 Slaked lime Hydrated lime Ca(OH)2
Molecular Weight 74.09 g/mol
Component Compounds CID 962 (Water) CID 5460341 (Calcium)
Explanation:
If you measure the mass of a sample of an unknown gas, and also measure the volume, pressure, and temperature, what identifying quantity can you calculate?
Answer:
The molar mass of the gas
Explanation:
The ideal gas equation of state is:
PV = nRT
If we measure the volume (V), the pressure (P), and the temperature (T), we use the gas constant R (0.082 L.atm/K.mol) to calculate n (moles of gas):
n = PV/RT
Then, we can divide the mass into the number of moles to calculate the molar mass of the gas:
molar mass = mass/n
What energy allows for the difference in the spacing of molecules in a liquid versus a gas?
A. Electrical energy
B. Radiant energy
C. Potential energy
D. Kinetic energy
Answer:
kinetic energy
Explanation:
yeah it's correct
[40 points] How do I find the average atomic masses of these?
Answer:
14.02 amu
Explanation:
The following data were obtained from the question:
Isotope A (N–13):
Mass of A = 13 amu
Abundance (A%) = 28.97%
Isotope B (N–14):
Mass of B = 14 amu
Abundance (B%) = 41.04%
Isotope C (N–15):
Mass of C = 15 amu
Abundance (C%) = 29.97%
Average atomic mass of nitrogen =?
The average atomic mass of nitrogen can be obtained as illustrated below:
Average = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]
= [(13 × 28.97)/100] + [(14 × 41.04)/100] + [(15 × 29.97)/100]
= 3.77 + 5.75 + 4.50
= 14.02 amu
Thus, the average atomic mass of nitrogen is 14.02 amu
Which statements correctly compare the masses of protons neutrons and electrons
A compound with a formula mass of 45.08 g/mol is found to be 85.64% Carbon and the remainder Hydrogen. Find the molecular formula:
A balloon contains a mixture of 2 gases, X and Y. If the pressure in the balloon is 1.50 atm and there are 3 moles of X and 7 moles of Y present, what is the partial pressure of each gas?
Answer:
Partial Pressure of X = 0.45 atm
Partial Pressure of Y = 1.05 atm
Explanation:
Mixture of gas = Gas X + Gas Y
Total number of moles = 3 + 7 = 10 moles
Total pressure = 1.50 atm
The relationship between partial pressure, total pressure and number of moles is given as;
Partial pressure of gas X / Total pressure = Number of moles of gas X / Total number of moles
Partial Pressure of gas X / 1.50 = 3 / 10
Partial Pressure of gas X = 1.5 * 3 / 10 = 0.45 atm
The total pressure of a mixture is a sum total of the individual pressures, hence;
Pressure of mixture = Partial Pressure of X + Partial pressure of Y
1.5 = 0.45 + Partial pressure of Y
Partial Pressure of Y = 1.5 - 0.45 = 1.05 atm
During homogeneous catalysis, if a catalyst is present in the liquid phase, which phase must the reactants be in?
Answer:
The reactants must be in the liquid phase.
Explanation:
Homogeneous means that something is of the same nature.
In the context of catalysis, it means that the catalyst and the reactants are in the same phase.
If the catalyst is in the solid phase, the reactants are solids are well.
If the catalyst is in the liquid phase, then the reactants are also in the liquid phase.
And so on.
In the artice, "As Sticky as a Gecko...but Ten
Times Stronger, scientists applied knowledge of
gecko feet to produce an adhesive, How did
scientists explain this application of knowledge?
Check all that apply.
The researchers created an adhesive made
from nitrogen nanotubes.
The adhesive is made up of two different
layers.
The lower layer is made up of vertically
aligned nanotubes
The upper layer is made up of curly.
spaghetti-ike, nanotubes.
Answer:
The adhesive is made up of two different layers.
The lower layer is made up of vertically aligned nanotubes.
The upper layer is made up of curly, spaghetti-like, nanotubes.
Answer:
B,C,D
Explanation:
PLEASE HURRY!!! I WILL GIVE BRAINLEIST!!!!
Study the diagram of a cell. Which structures are found in both plant and animal cells? W and X W and Z X and Y O Y and Z XN Y -W
Answer:
A I did the exam and I saw A sorry if it is wrong dont have the best of memory
If a substance has a half-life of 14.9 s, and there are initially 100.0 g of the substance, how many grams will remain after precisely five minutes?
Answer:
[A] = 8.69x10⁻⁵g
Explanation:
Kinetics law of a radioactive atom, A, is:
Ln[A] = -kt + ln[A]₀
Where [A] could be taken as mass of A after time t (In seconds),
k is rate constant = ln2 / Half-Life
[A]₀ is intial mass of A
k = ln2 / 14.9s = 0.04652s⁻¹
Time in seconds:
5min * (60s / 1min) = 300s
Replacing each value:
ln[A] = -0.04652s⁻¹*300s + ln[100.0g]
ln[A] = -9.35
[A] = 8.69x10⁻⁵gExplain how atoms organize to create larger structures?
Answer:
First of all they are super tiny particles of neutrons, electrons and protons. Then they come together to organize a structure of atom. Atoms come together to form a molecule and smaller molecules work together to form macromolecules. Thus, how they organize and form building blocks of a substance.
Hope it helps!<3
Someone took the last cookie from the cookie jar last night. The last person to leave the scene is the culprit. Who was it? Highlight the guilty culprit based on the clues provided.
An ice cube melts on the warm sidewalk on a hot summer day. Let the entropies of the ice cube, of the pavement and of the ice cubesidewalk system be Sice, Ssw and Ssys. What happens to these entropies?
1. Sice increases, Ssw decreases, Ssys does not change.
2. Sice decreases, Ssw increases, Ssys decreases
3. Sice increases, Ssw decreases, Ssys increases
4. Sice increases, Ssw increases, Ssys increases
Answer:
3. Sice increases, Ssw decreases, Ssys increases
Explanation:
Entropy basically refers to the degree of disorderliness of a system.
Ice Cube --> As the ice cube melts, it undergoes a change in state of matter from solid to liquid hence it's entropy increases as the degree of movement of its molecules is more disordered in the liquid state.
This means the likely options are; 1, 3 and 4.
Sidewalk --> The entropy here decreases as the ice melts on the side walk. This is because there is a reduction in temperature. Entropy is directly proportional to temperature. Decrease in temperature leads to decrease in entropy.
This means the likely option is 1 and 3
The net entropy change of the system is however positive.
Percent yield is very important in terms of money. The higher the percent yield, the more of a product you can make. If you are working for a drug company and your theoretical yield is 120 kg, but you actually made 105 kg, what is your percent yield?
A. 8.75%
B. 114%
C. 87.50%
D. 15.00%
Answer:
87.5 %
Explanation:
Step 1: Given data
Theoretical yield: 120 kgReal yield: 105 kgStep 2: Calculate the percent yield
When working with chemical reactions, we can determine the efficience in obtaining a product measuring the percent yield. The theoretical yield is the maximum amount of product that we could obtain according to the stoichiometry, whereas the real yield is the amount of product that we actually obtain when we carry out the process. We can calculate the percent yield usign the following expression.
%yield = real yield / theoretical yield × 100%
%yield = 105 kg / 120 kg × 100%
%yield = 87.5 %
Which total mass is the largest?
(A) The mass of 2 electrons
(B) The mass of 2 neutrons
(C) The mass of 1 electron plus the mass of 1 proton
(D) The mass of 1 neutron plus the mass of 1 electron
Answer: B
Explanation: because the subatomic particle with the largest mass is the neutron.
true or false the human body system works together to maintain
Answer:
Im pretty sure it would be true
Explanation:
When an ionic compound exhibits two sub-atomic lattices with equal magnetic moments, the material is said to be ________________.
Answer:
When an ionic compound exhibits two sub-atomic lattices with equal magnetic moments, the material is said to be antiferromagnetic
Explanation:
Antiferromagnetism is a type of magnetism in solids such as certain metals and alloys as well as some ionic solids, whereby the magnetic domains or moments of the materials ( atoms, molecules, ions) are aligned in opposite directions.
The magnetic domain or moment of a material is the region in which the magnetic fields of atoms are grouped together and aligned.
In antiferromagnetism, the magnetism from magnetic atoms or ions oriented in one direction are cancelled by magnetism of other magnetic atoms or ions aligned in the opposite direction. The magnetic moments are equal in magnitude but oppositely directed. In ionic compounds, two sublattices of identical ons have opposite spin directions. Thus, the net magnetic moment of an antiferromagnet is zero.
Heating the solids disrupts this antiparallel arrangement of atomic moments of the magnets, and above a certain temperature called the Néel temperature, the arrangement disappears completely.
what form of energy causes an ice cube to melt
A.mechanial
B.magnetic
C.sound
B.thermal
Answer:
Thermal
Explanation:
When something heats up its atoms become further apart making it melt when something heats up or gets heat or loses heat that's thermal energy
A catalyst accelerates a reaction because:_____.
a. it increases the number of collisions between molecules.
b. it increases the number of molecules with energy equal to or greater than the activation energy.
c. it supplies energy to reactant molecules.
d. it lowers the activation energy for the reaction.
e. it increases the temperature of the molecules in the reaction.
Answer:
D. Lowering activation energy for the reaction
Explanation:
Catalysts increase the rate of a reaction without being used up. They do this by lowering the activation energy needed. With a catalyst, more collisions result in a reaction, so the rate of reaction increases.
Hope this helped :)
A rocket accelerates at 56 m/s2. It has a mass of 800,000 kg. Calculate the force (thrust) that the rocket engines must supply.
Answer:
4.5 × 10⁷ N
Explanation:
Step 1: Given data
Acceleration of the rocket (a): 56 m/s²Mass of the rocket (m): 800,000 kgStep 2: Calculate the force (F) that the rocket engines must supply
We can calculate the required force using Newton's second law of motion.
F = m × a
F = 800,000 kg × 56 m/s²
F = 4.5 × 10⁷ N
The required force is 4.5 × 10⁷ Newton.
Which of the following types of organelle is most important in providing a cell with energy?
A.
cell membranes
B.
mitochondria
C.
nuclei
D.
vacuoles
Answer:
b. Mitochondria! :)
Explanation:
The mitochondria is the powerhouse of the cell. It's a membrane-bound cell organelle that generates most of the chemical energy (ATP) needed to power the cell's biochemical reactions.
Hope this helped!
What is the visual differences between elements compounds and mixtures
Answer: yes I can do that tomorrow
Explanation:
which orbital has the highest energy level
Answer:
p orbitals
Explanation:
