The compound do you believe will have an absorption maximum at a longer wavelength in a UV-VIS spectrum is 1,3-butadiene
This is because 1,3-butadiene has conjugated double bonds, which allow for delocalization of electrons across the molecule. This extended pi-electron system leads to a larger energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), resulting in absorption at longer wavelengths. In contrast, ethylene only has a single carbon-carbon double bond and does not exhibit conjugation, leading to a smaller energy gap and absorption at shorter wavelengths.
Therefore, the presence of conjugated double bonds in 1,3-butadiene allows for a greater degree of electronic delocalization, resulting in absorption at longer wavelengths in a UV-VIS spectrum. In summary, 1,3-butadiene is expected to have an absorption maximum at a longer wavelength in a UV-VIS spectrum compared to ethylene due to the presence of conjugated double bonds and subsequent delocalization of electrons.
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is there a relationship between the relative age of stars in the number/identity of element is found within them
Yes. Stars use fusion to create nuclear energy, which is what makes them "alive". The older they are, the "bigger" the element in them is. Hydrogen turns into Helium, and when hydrogen is used up, the helium starts fusing into bigger elements. it stops at iron however. Once stars start fusing silicon to iron, it is doomed because it takes more energy than it gives off.
Each element... A. Has only one kind of atom B. Has only one kind of molecule C. Is made of rock D. All of the above
Answer:
A. Has only one kind of atom
Explanation:
All forms of matter are composed of elements.
An element is a substance which cannot be broken down into simpler units or converted into other substances by ordinary chemical reactions. Each element is composed of only one kind of atoms which are unique to each element. There are three fundamental sub-particles present in atoms of elements; these are: protons, electrons and neutrons. An atom of an element differs from an atom of another element by its atomic number. The atomic number of an element is the number of protons present in the nucleus of the atom of that element. For example, hydrogen atoms has an atomic number of 1, while sodium atoms has an atomic umber of 11.
Atoms of the same element or different elements may combine together to form the molecules of a substance. For example, a molecule of hydrogen gas is made up of two atoms of hydrogen whereas a molecule of water is composed of two atoms of hydrogen and an atom of oxygen.
Elements can exist in any of the three physical states: solids, liquids or gases. For example, hydrogen exists as gas, mercury as a liquid, while gold exists as a solid.
6. What are formed from the chemical reaction of the substances given
below? Write the balanced chemical reaction as well.
a) when calcium carbonate and hydrochloric acid react with eachother
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)
AHHH I need help ASAP what does TAILS stand for in science??
5. What is the mass of 5.502 mol CaCl,?
Answer:
415.401g
Explanation:
1 mol of CaCl = 75.5g
5.502mol of CaCl = xg
so 5.502 × 75.5 = 415.401g
Please help with this question!
Answer:
The answer is 1:1
Explanation:
thermal pollution is when the temperature of a body of water is increased due to warmer water being added.
true or false
Answer:
true
Explanation: pull in relatively cool water to cool their machinery and let the relatively warm water flow back into the river or lake or sea. ... Water on hot paved surfaces gets hot, then runs off into nearby bodies of water, raising the water temperature
Answer:
True
Explanation:
Heat is classified as is classified as a water pollutant when it is caused by heated industrial effluents or from anthropogenic (human) alterations of stream bank vegetation that increase the water system temperatures due to solar radiation.
Hope that helps
18.The Halogen family of elements all have 7 valence electrons. Which column would they be in?
a.01 (IA)
b.02 (IIA)
c.4 (IVA) or 14
d.7 (VIIA) or 17
If 3.68 grams of zinc were allowed to react with excess hydrochloric acid to produce zinc chloride and hydrogen gas, how much zinc chloride should be produced?
Suppose that 7.12 grams of zinc chloride is actually recovered, what is the per cent yield?
Answer:
Here... Since there is excess HCl, you know the Zinc will be the limiting reagent. I was able to create the reaction equation based on the info you gave: Z + 2HCl ----> ZCl2 +2H. Now, in order to find the theoretical yield of ZCl, you need to convert Zinc from grams to moles. Do this by dividing by its molar mass (65.38), thus: 3.68 (g) / 65.38 (g/mol) = 0.056286... moles.
Now, using the balanced equation we made earlier, we see that 1 mole of Zinc creates 1 mole of ZCl2. Thus our ratio is 1:1. This makes the next step easy. Since it is 1:1, we multiply the number of moles we have of Zinc (0.056286...) by the number of moles it will create of ZCl (1). (0.056286)(1) = 0.056286 moles ZCl. Now convert this to grams by multiplying by its molar mass (136.28) and you get 7.67 grams. This is your theoretical yield. The percent yield is found by dividing the actual amount obtained (7.12 g.) by the theoretical yield (7.67 g.) then multiply that by 100%. When this is done, your Percent Yield is about 92.8%
The melting point of oxygen is -218°C and its boiling point is -183°C. What is the state of oxygen at -200°C?Immersive Reader
it is in a liquid state
Explanation:
As stated in the article, “As Sticky as a Gecko . . . but Ten Times Stronger!,” the adhesive the researchers developed sticks best when it is pulled down parallel to the surface. What type of adhesion is this called?
The answer is Shear Adhesion, i just took the test on 21 edge.
Answer:
shear adhesion
Explanation:
edge
Shear adhesion sticks best when it is pulled down parallel to the surface.
What is shear adhesion?Shear adhesion is defined as the ability of tape due to which it resists the static forces which are applied in same plane as in backing.It is usually expressed in terms of time required by a given weight for an amount of tape to become loose from a vertical plane.
Molecular weight between two entanglements is the controlling factor of shear adhesion. Shear adhesion is affected by the following parameters which areas follows:
1)Tg of adhesive - Shear adhesion increases as Tg rises up to a certain temperature which is less than the room temperature.
2) Tan delta minimum value of adhesive- It is found that shear adhesion improves by an increase in tan delta minimum value.
3)Adhesive polarity- It is an important factor which affects adhesion such as tack,peel and shear.Adhesion performances are improved by introducing polar ingredients in the formulation.
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PLS HELP *10 POINTS* I WILL GIVE BRAINLIEST
Answer:
Eurkaryote... sorry if i wrong
Explanation:
The purpose of meiosis is to produce
A. Sex cells
B. Body cells
C. DNA
Answer:
A)sex cells
Explanation:
it’s the production of gametes, or sperm and eggs
How many hydrogen ATOMS are needed to produce 2 water (H2O) molecules? HINT: ATOMS not molecules
Answer:
Just 4...
Explanation:
There are 2 hydrogen atoms in 1 water molecule, so in 2 water molecules would have 4 hydrogen atoms.
*booyah*
The monkeys at the zoo swing wildly from branch to branch.
Answer:
epic
Explanation:
hakuna matata
meantion the two groups of mineralsalts and their two examples (each)
Answer:
sodium example salt and soy sauce
potassium example meat milk fresh fruits
Cu2O + C->
Cu + CO2
Balance the above reaction by writing in the correct coefficient.
Answer:
2 Cu2O + C = 4 Cu + CO2
Explanation:
CU2O has 2 coefficient
C has 1 coefficient
Cu has 4 coefficient
CO2 has 1 coefficient
Balance Equation 2 Cu2O + C = 4 Cu + CO2
Answer:
2CU2O + C -----> 2Cu + CO2
Explanation:
2 is added in reactants to balance oxygen O on both sides and 2 before Cu is added in products to balance Cu on both sides.
Oxygen has 8 positively charged protons what is the number of negatively charged electrons in an atom of oxygen?
Answer:
8 electrons (e-)
Explanation:
In the atom of every elements, there are three sub-atomic particles namely: protons, electrons, and neutrons. The protons are the positively charged particles, the electrons are negatively charged while the neutrons are neutrally charged.
In an uncharged or neutral atom i.e. charge 0, the number of protons is always equal to the number of electrons because they cancel each other out. When a difference occurs in the number of these particles, the atom becomes charged i.e. an ion. According to this question, oxygen atom (O) contains 8 positively charged protons, this means that it also contains 8 negatively charged electrons in its atom.
should we learn chemical kinetic derivation
Answer:
Yes
Explanation:
It is important to learn about in science
Answer : Yes
Explanation:
One reason for the importance of kinetics is that it provides evidence for the mechanisms of chemical processes. Besides being of intrinsic scientific interest, knowledge of reaction mechanisms is of practical use in deciding what is the most effective way of causing a reaction to occur.
which form of molecular motion do liquids experience?
A translation,rotational,& vibrational
B vibrational and rotational
C translational and rotational
D transitional only
Answer:
I'm pretty sure that liquid moves by vibration
Explanation:
I asked my cousin
Given the following equation: Na2O + H20 - 2 NaOH
How many grams of Na20 are required to produce 1.60 x 102
grams of NaOH?
g
Answer:
124g
Explanation:
The concept stoichiometry is used here to determine the mass of Na₂O. The grams of Na₂O required to produce 1.60 x 10² grams of NaOH is 124 g.
What is Stoichiometry?The stoichiometry is an important concept of chemistry which help us to use the balanced chemical equation to calculate the amounts of reactants and products. The stoichiometric coefficient is the number of molecules that can participate in the reaction.
The balanced equation is:
Na₂O + H₂O → 2NaOH
1 mole of Na₂O is required to react with 1 mole of H₂O to give 2 moles of NaOH.
62 g of Na₂O produces 80 g of NaOH.
1 g of NaOH is produced from 62/80 g of Na₂O .
1.6 × 10² g of NaOH will require 62 × 1.6 × 10² g / 80 g of Na₂O = 124 g Na₂O
Thus the grams of Na₂O required to produce 1.6 × 10² g of NaOH is 124 g.
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does liquid evaporate with adding heat or losing it
HELP PLS PLS PLSSSS
Energy is converted from kinetic energy to potential energy when you
ski down a hill.
climb a mountain.
run around a track.
sit at a desk in physics class
Answer:
CLIMB A MOUTAIN
Explanation:
B
Each cell in an organism contains a set of hereditary information that gets passed from one generation to the next. The genes in all organisms contain instructions needed to make offspring. Which statement describes
heredity in animals?
A Offspring show recessive traits only.
B Offspring receive genetic traits from a single parent only.
C Offspring receive genes with traits that are always physically observable.
D Offspring receive genes from each parent, which contribute to the traits in the offspring.
please help
Answer:
D
Explanation:
Offspring receive genes from both parents, they don't always have a recessive or dominant train but if they do have a dominant trait, it will always show while the recessive will only show if there is no dominant trait. For example: DD, Dr, and rr (D= dominant r = recessive)
Answer:D
Explanation:
i did this one too and it’s right
How many carbon (C) atoms are in CaCo3?
Answer:
Calcium carbonate is a molecule that contains one atom of calcium, one atom of carbon, and three atoms of oxygen.
:)
Answer:
i thinks its one carbon atom
Explanation:
What feature of the sun changes to create the solar cycle?
a
Brightness
Hydrogen gas
Nuclear fusion
Magnetic field
What is the correct IUPAC name for CuNO₃?
Answer:
Copper(i) nitrate
Explanation:
That is the correct name.
Answer:
Molecular Formula
Explanation:
What is the boiling point of water?
A. 0°C
B. 50°C
C. 70°C
D. 100°C
Answer:
D) 100*C
Explanation:
Answer:
A. 0°C
Explanation:
El agua se evapora a los 0 grados
Given three (3.00) moles of gold (Au), how many grams do you have?
a. 66 g
b. 197 g
C. 591 g
d. 6.02 x 1023 g
Collision of which two types of plates create the deepest earthquakes? Why do you think this is?
Answer:
The collision of oceanic plates and any other plates in which the oceanic plate slides beneath the other plate creates the biggest earth quakes. Most of these earth quakes occur beneath the sea or oceans and can cause volcanic eruptions as well. Tsunami is another oceanic event that occurs due to earth quakes occurring due to shifting of plates beneath the sea.