Answer:
153.56g
Explanation:
Number of moles = mass/molar mass
To get the number of moles of the molecule, we divide the number of molecules contained by Avagadro's number, which is 6.02 × 10^23 molecules.
moles = 4.12 × 10^24 ÷ 6.02 × 10^23
number of moles = 0.684 × 10^(24-23)
number of moles = 0.684 × 10^(1)
number of moles = 6.84mol
If the molar mass of the molecule is 22.45 g/mol, the mass of the molecule can be calculated thus:
mass = moles × molar mass (MM)
mass = 6.84 × 22.45
mass = 153.558
mass = 153.56g
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
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
A metal ion uses d2sp3 orbitals when forming a complex. What is its coordination number and the shape of the complex?
Answer:
Octahedral
Explanation:
The idea of hybridization is a valence bond concept introduced by Linus Pauling and soon became an important explanation for the structure of molecules even in coordination chemistry.
Hybridization involves the mixing of orbitals of appropriate energy to form a new set of orbitals that are more suitable for bonding with ligands.
When one s, two d and three p orbitals are hybridized in complex formation, octahedral complexes are formed.
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.
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
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:
Which statements correctly compare the masses of protons neutrons and electrons
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
#SPJ2
which orbital has the highest energy level
Answer:
p orbitals
Explanation:
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.
A student is looking for an element to react with lithium to create the most vigorous reaction possible. To which direction on the periodic table should the student look?
A. Lower left
B. Upper left
C. Lower right
D. Upper right
Answer:
D. Upper right
Explanation:
The position the student should look for such element is in the upper right corner before the noble gases.
Specifically, the group of halogens will react vigorously with lithium.
Lithium is an electropositive metal. To attain stability, it must lose an electron. The group of halogens are a series of highly electronegative elements. They have 7 electrons in their outer shell and requires just one more to complete their octet. Therefore, they combine violently with halogensHalogens are found in the upper right corner on the periodic table.Answer:
D. Upper right
Explanation:
I had the exact same question
Part A: You are given a beaker containing a solution of an enzyme that hydrolyzes adenosine triphosphate (ATP) while it generates a lot of heat. You add a substantial amount of the sodium salt of ATP, and you measure the temperature of the beaker, and determine that nothing is happening. The enzyme is not performing the reaction. What is a reasonable chemical to add to the solution to get the enzyme to proceed with the hydrolysis of adenosine triphosphate?
Sulfur oxide,
Iron chloride,
magnesium chloride,
or add more sodium ATP.
Part B: You are investigating the reduction of oxygen that is performed by cytochrome c oxidase. As you start the reaction in a slightly acidic aqueous buffer with 2 mM Cu2SO4 and bubbling oxygen into the buffer. As the reaction proceeds, the solution slowly turns blue, what is happening?
a) Ozone is formed. This causes the solution to turn blue.
b) The copper is getting oxidized from Cu+ to Cu2+ and turns blue.
c) The cytochrome c oxidase protein is decomposing down to a blue product.
d) The pH of the solution is changing. Cu2SO4 is a pH indicator that turns blue when a solution becomes basic.
Part C: In the previous reaction, if you add a small amount of cyanide before adding the
Cu2SO4, the solution does not turn blue. What is a reasonable explanation?
a) The cyanide ion displaces the copper ions in the cytochrome c oxidase and stops the redox reaction.
b) The cyanide ion keeps the pH of the solution high. So the Cu2SO4 pH indicator does not show the decrease in pH.
c) The cyanide ion prevents the formation of ozone.
Answer:
1) magnesium chloride
2) b) The copper is getting oxidized from Cu+ to Cu2+ and turns blue.
Explanation:
The work published by David N. Frick, Sukalyani Banik, and Ryan S. Rypma in J Mol Biol. 2007 Jan 26; 365(4): 1017–1032 clearly shows that divalent metal ions of group 2 such as Mg^2+ play an important role in ATP hydrolysis. Addition of EDTA decreased the rate of hydrolysis of ATP (due to sequestration of the divalent ion of group 2) indicating an active participation of divalent ions in the process.
2) The copper I ion is colourless because it is a d^10 specie. However, when it is oxidized to Cu^2+, a blue colour appears in the solution.
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
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.
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:
Cl2 +
NaBr
-
NaCl +
Br2
Answer:
hope this helps :)
Explanation:
Cl2 + NaBr = NaCl + Br2
NaCl + Br2 = NaBr + Cl2
What is the electron configuration for N (nitrogen)?
A. 1s22s23s23p1
B. 1s21p5
C. 1s22s22p3
D. 1s22s22p23s1
Explanation:
₇N = 1s² 2s² 2p³
Group = 15period = 2atomic mass = 14Hydride of Nitrogen = Ammoniavalency = 3Therefore,
Option C is correct ✔
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!
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
where do the non metals located on the periodic table
10 mL of a 0.65 M KMnO4 solution is diluted to a concentration of 0.055 M. What is the final volume of the diluted solution?
a. 20.0 mL
b. 0.846 mL
c. 108 ml
d. 118 ml
Answer:
118 mL
Explanation:
We can easily calculate the final volume of the solution (V₂) by applying the following mathematical expression:
V₁ x C₁ = V₂ x C₂
⇒ V₂ = V₁ x C₁/C₂
Given:
V₁ = 10 mL
C₁ = 0.65 M
C₂ = 0.055 M
We replace the data in the mathematical expression to calculate V₂:
V₂ = V₁ x C₁/C₂ = 10 ml x (0.65 M)/ (0.055 M) = 118.18 mL ≅ 118 mL
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.
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] = 8.69x10⁻⁵gDensity = Mass
Volume
To find the density of a solid:
Find the mass of the block.
Find the volume of the block using (length x width x height)
Use the equation to find density.
#1 #2 #3 #4 #5 = (2x3x4) #1/#5
Block #
Mass (g)
Length (cm)
Width (cm)
Height (cm)
Volume
(cm3)
Density (g/cm3)
1
75
6
3
4
72
1.04
2
3
4
5
6
7
8
Follow up questions:
Which two blocks were made out of the same material?
How do you know?
Does a larger block always have a higher density?
Answer:
what is it all about???
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:
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.
Explain 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
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
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 %
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:
