The complex ions in order of increasing wavelength of light absorbed are [Co(en)]₃⁺ < [Co(H₂O)₆]₃⁺ < [Co(CN)₆]³⁻ < [Co(ox)₃]³⁻.
The wavelength of light absorbed by a complex ion is related to the energy difference between the ground state and an excited state of the ion. The higher the energy difference, the shorter the wavelength of light absorbed.
Among the given complex ions, [Co(en)]₃⁺ has the smallest energy difference and therefore absorbs light with the longest wavelength. [Co(H₂O)₆]₃⁺ and [Co(CN)₆]³⁻ have intermediate energy differences, so they absorb light with intermediate wavelengths. Finally, [Co(ox)₃]³⁻ has the largest energy difference and therefore absorbs light with the shortest wavelength.
Therefore, the order of increasing wavelength of light absorbed by the complex ions is [Co(en)]₃⁺ < [Co(H₂O)₆]₃⁺ < [Co(CN)₆]³⁻ < [Co(ox)₃]³⁻.
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If the molecular mass of a substance is 7.304 • 10²³ g, find its molar mass.
Answer:
1.213 g/mol
Explanation:
We are given that the molecular mass is 7.304 × 10²³ g.
From avogadro's number, we know that;
1 mole of a substance = 6.022 × 10²³ molecules
Thus;
Molar mass = molecular mass/avogadro's number = (7.304 × 10²³)/(6.022 × 10²³) = 1.213 g/mol
Katrina inserts a key into her car’s ignition. She turns the key, putting her car into ignition mode. In this mode, some energy is used to increase the temperature of the car’s fuel. This energy allows the fuel to combust and the car to move. What’s this energy called?
A.
absorbed energy
B.
activation energy
C.
chemical energy
D.
released energy
E.
solar energy
Answer:
B
Explanation:
Answer:
the correct answer is B
Explanation:
how did the periodic table get its name?
a. the periodic table got its name from the way the elements are arranged in periods called groups.
b. the periodic table got its name from the way the elements are arranged in rows which are called periods.
c. the periodic table got its name from the way the elements are arranged in rows which are called periodic groups.
d. the periodic table got its name from the way the elements are arranged in rows which are called groups.
Answer:
no te engiendo mi panahellow
Answer:
b
Explanation:
b. the periodic table got its name from the way the elements are arranged in rows which are called periods.
How many atoms are in 11.5 g of Hg?
A. 5.73 x 10^-2 atoms
B.3.45 atoms
C.3.45 x 10^22 atoms
D. 5.73 atoms
how many mongo seed are equal to 3.50 moles of mongo seeds?
answer:
2.107 x 10^24 mongo seeds
Answer:
50 moles of many mango seeds = 2.107.10²⁴ mango
Further explanation
A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12
While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule
With Avogadro's number
N = number of gas particles
No = Avogadro number (6.02.10²³)
n = number of moles
n= N/No
3.50 moles of many mango seeds are comparable to
N mango seeds= 3.5 x 6.02.10²³
N mango seeds=2.107 x 10²⁴..
Explain why coal, oil, and natural gas are fossil fuels.
Answer:
They are fossil fuels because they were formed because of fossilized remains of animals and plants that lived many years ago. They also have a high carbon content.
reaction type
__HCl + __Mg -> __MgCl2 + __H2
Analyze the definition of light-year. Why is it in space we use light-year to
measure distance? *
Answer:
Because the distance is too far to count with any other way
Explanation:
5. Predict which element would have a higher electron affinity: silicon or arsenic. Support your prediction with an explanation.
Answer:
Silicone
Explanation:
According to periodic trends, electron affinity increases as you go right and decreases as you go down. Silicone is above arsenic so I would expect it to have a higher electron affinity.
How many atoms of Mg are present in 97.22 grams of Mg?
Answer:
2.439 x 10E24 atoms
Explanation:
from
N=n x NA where
N- number of atoms
n-number of moles and NA is the avogadro's number
substances can be categorised in two ways: as an element, mixture or compound ora as a solid, liquid or gas. which
of these methods Is of most use ti chemist?
Answer:
Most substances on earth are compounds and most interesting chemistry is done with compounds. Most interesting chemistry is done with mixtures of compounds although they often start with pure compounds and then do reactions as mixtures. Most chemistry is carried out in liquid solutions made up of compounds that are solids, liquids, or gases in their pure form.
Explanation:
Here, we are required to determine which of these methods of classifying substances is most important to chemists.
The most useful classification of compounds to chemists is as Elements, Compounds or MixturesFirst classification of substances involves categorising them as pure substances (elements and compounds) or mixtures.
The second classification of substances is categorisation with respect to their state of matter. In essence, we can have solid, liquid or gas.
However, the most useful classification of compounds to chemists is as Elements, Compounds or Mixtures.This is so because, the type of matter present in Elements are distinct for each element, same as for Compounds and Mixtures formed from a combination of pure substances.
Chemists focus on the diverse properties of substances, as such classification as elements, compounds and mixtures provides a wide basis for the qualitative and quantitative analysis of the properties of substances.Classification of substances as solid, liquid or gas leaves a narrow avenue for the study of substances as the substance still contains the same type of matter, only this time in different states.Read more:
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how can you tell if an substance is an elements
Answer:
A substance that cannot be broken down into chemically simpler components is considered an element
Hope that helps:)
blood plasma for average adults has a volume of 3100mL. if the density of plasma is 1.020 g/mL, what mass of plasma is in the average adult?
Answer:
Noseeeeeee
Explanation:
Eeeeeeeeeee
Which is the function of a cell′s nucleus
Answer:
The cell's nucleus controls the activities of a cell and carries genes that contain information.
I'll give Branliest to the most efficient and first answer.
1. What major change in our thinking about the path of a moving electron had to be made with the advent of quantum theory?
2. Calculate the wavelength of a space shuttle with a mass of 2.05 x 107kg traveling at a rate of 7.85 x 103 m/s.
Answer:
See explanation
Explanation:
1) With the advent of the quantum theory came the idea that the path of a moving electron can not be exactly determined. We can only talk about the probability of finding the electron within a given region in space.
2) Using the De Broglie's relation;
λ = h/mv
Where;
λ = wavelength
h = Plank's constant
m = mass
v = velocity
λ = 6.6 * 10^-34/2.05 x 10^7 * 7.85 x 10^3
λ = 4.1 * 10^-25 m
It's football season! Big Bubba Brown is running full speed trying to tackle the quarterback before he throws the ball. Wham! He got him! What happens to Big Bubba Brown?
A. Bubba uses all of his energy to tackle the quarterback.
B. Bubba and the quarterback lose their energy and fall to the ground.
C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.
D. Bubba knocks the quarterback down and keeps running at the same speed as before the tackle.
this is science btw.
Answer:
C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.
Explanation:
I majored in Science
Answer:C. Some of Bubba's energy is transferred to the quarterback and Bubba slows down.
just did the usatestprep
Wendy wants to find out if a substance is an acid or a base. What are two ways that Wendy could
investigate to find out what kind of substance it is?
Without tasting a colorless liquid, an acid or a base can be determined using indicators.
The three most common indicators to test for acids and bases are: Litmus. Methyl orange. Phenolphthalein.
How do you know something is an acid?One practical method for determining how acidic something is is to use the pH scale. A solution is acidic if its pH is less than 7. If the pH of the solution is 7, it is neutral; if the pH is greater than 7, it is basic.To identify acids and bases, two types of litmus paper are available: red litmus paper and blue litmus paper. When exposed to acidic conditions, blue litmus paper turns red, while red litmus paper turns blue when exposed to basic or alkaline conditions.
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83.0 g Lithium Cyanide (LiCN)
calculate this to molar mass and moles. Please
Answer:
32.958 g/mol
2.52 moles
Explanation:
Finding the molar mass:
Use the periodic table to determine the masses of each element
6.94+12.011+14.007=32.958 g/mol
Moles:
83 g*1 mol/32.958 g = 2.5183566964 moles
[tex]\\ \sf\longmapsto LiCN[/tex]
[tex]\\ \sf\longmapsto 7u+12u+14u[/tex]
[tex]\\ \sf\longmapsto 21u+12u[/tex]
[tex]\\ \sf\longmapsto 33u[/tex]
[tex]\\ \sf\longmapsto 33g/mol[/tex]
Given mass=83gNo of moles=Given Mass/Molar mass[tex]\\ \sf\longmapsto \dfrac{83}{33}[/tex]
[tex]\\ \sf\longmapsto 2.5mol[/tex]
How does gravity help to demonstrate a cause-and-effect relationship?
Answer:
Gravity helps show a cause and effect by demostarting how one object will have an effect on another object.
Explanation:
If you bounce a ball, it will fly back up, but it will fall down again because of gravity. The cause is GRAVITY and the effect is the ball FALLINg. Now, because o fgravity, when the ball bounces up again, it will only bounce 1/2 the hieght, having another cause and effect. As gravity pushes down on objects, the more an object is effected by it, the more presure it will have.
Hi people senko-San is best wifu change my mind
Answer:dude what are you doing here?
Explanation:also i don’t know if I can lol
Which cell organelle controls all cell activities? Group of answer choices B. Nucleus C. Cytoplasm D. Mitochondria A. Cell Membrane E. Cell Wall
Which statement about an object in motion is correct?
Help
explain the factor of a skeleton system
Explain why it is often necessary to start a campfire with many pieces of kindling (small pieces of wood) rather than with a few large logs
Answer:
It is often necessary to start campfire with many pieces of kindling rather than large logs because it is easier to ignite smaller pieces than larger pieces. Imagine wanting to light up a pile of clothes and a small piece of a shirt. Which ignites faster? The piece of a shirt, because it is smaller and more likely to burn very quickly. Additionally, people criss-cross these tiny pieces of wood to enable more surface area and to allow more oxygen to pass through. As you know, oxygen is necessary for a flame to ignite.
how many moles are in 3.0x10^24 molecules of water
Answer:
3.52 x 10^24 molecules x `1mol/6.02 x 10^23 molecules = 5.85 moles of H2O.
Explanation:
What type of solution is seltzer water? a liquid-liquid b metal-liquid c gas-liquid
Answer:
(I think its mixture not solution)
Explanation:
Multiphase Mixtures
Carbonated water (or carbonated anything) is a multiphase heterogenous mixture, with gaseous carbon dioxide (CO2) bubbling through liquid water (H2O).
Answer: The answer is C. Gas-Liquid
Explanation: I just took the quiz
what is the skeleton equation of 2Na + Cl2 → 2NaCl.
Answer:
Mark me as brienleist
Explanation:
mother aware to u
What are the effects of colonialism on Africa today?
Colonialism made African colonies dependent by introducing a mono- cultural economy for the territories. It also dehumanized African labour force and traders. It forced Africans to work in colonial plantations at very low wages and displaced them from their land
Which phrase describes runoff?
1.underground water that flows into lakes
2.river water that empties into an ocean
3.water from streams that flows into larger rivers
4.water from rain and snow that travels to streams
Please help!
Explanation:
water from rain and snow that travels to streams
Please help!
Water from a rain and snow that travels to streams are examples of run off. These natural processes are part of water cycle and balance the water content in the atmosphere and hydrosphere.
What is water cycle ?Water cycle is a geological phenomenon to balance the water content in the atmosphere, hydrosphere and in the biosphere. The water bodies evaporate by the heat radiated by sun.
The air moisture can be restored to the land through the cooling of the vapor and pour as rain. This best illustrates the interaction between atmosphere and hydrosphere.
Rain, snow, sleet, or hail that reaches a surface stream without ever going below the soil's surface is referred to as surface runoff. It differs from direct runoff, which is runoff that directly reaches surface streams following rainfall or snowmelt. Hence option 4 is correct.
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HELPPP which one has four energy levels Si, Ge, or Sn???
Answer:
Ge
Explanation:
pretty sure im on high school 12th