Answer:
secondary colours:orange, green and purple.
" The use of insecticide is not an interest but an obligation". justify the statement
Answer:
Insecticides are not good for health. Their use is harmful to other animals, birds and humans. But, without their use, it is not possible to grow the required amount of food. So, "the use of insecticide is not an interest, but an obligation".
When two oxygen atoms bond together in o2 what type of covalent bond do they form.
When two oxygen atoms bond together in O2, they form a non-polar covalent bond.
What are covalent bonds?
A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. These electron pairs are mentioned as shared pairs or bonding pairs. once they share electrons, the stable balance of attractive and repulsive forces between atoms is known as a covalent bond When two oxygen atoms are bonded as O2, they form a non-polar covalent bond. When two non-metal atoms sharing of electrons, a covalent bond is created. The involved electrons are located in the atoms' outer shells. An atom's outer shell will be completed if it shares one or both of its electrons. Covalent bonds require a lot of energy to break because they are so strong.
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Stoichiometry is the branch of chemistry that deals with elements in
compounds and with reactants and products in chemical reactions,
focusing on.
a. bonding
b. energy transfers
c. mass relationships
d. physical characteristics
What is the full number for 5.7x10^4
Answer:
5.7*10^4 is equal to 57,000.
Explanation:
First, we must multiply 10 by its power, 4. That would be 10 4 times.
10*10*10*10 = 10,000.
Then, we multiply it by 5.7.
5.7*10,000 = 57,000.
Regards!
is neutralizing a base, physical or chemical property?
Answer:
I think it is chemical because neutral makes me think of acidity, which is a chemical property.
Which of the following is a property of a pure substance?
given the deque 10, 12, 14, 16 (front is 10), what will the deque look like after the following operations? push-front 2, push-back 13, push-front 8, pop-front, pop-back, push-back 18
After the given operations, the deque will look like this: 8, 2, 10, 12, 14, 16, 13, 18.
The deque stands for Double Ended Queue. Deque is a linear data structure where the insertion and deletion operations are performed from both ends.
We can say that deque is a generalized version of the queue. Though the insertion and deletion in a deque can be performed on both ends, it does not follow the FIFO rule.
Deque is a data structure that inherits the properties of both queues and stacks.
Additionally, the implementation of this data structure requires constant time, i.e., time complexity = O(1).
This means you can use deque to your advantage to implement both the queue and stack.
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Sean is moving heavy furniture by sliding it
across the floor. He puts a blanket
underneath the furniture. Why did this help
him?
Answer:
the blanket let's him slide it across the floor because the has less friction with the floor than the furniture.
Answer:
Blanket underneath the furniture may reduce the kinetic friction
Explanation:
When sliding an object across a surface, the force of kinetic friction will oppose the movement of the object.
By placing a blanket between the object and the surface, the kinetic friction coefficient may be reduced.
Therefore, putting a blanket underneath the furniture may reduce the kinetic friction coefficient, then making it easier to slide the forniture.
(Hi fyi this answer took a lot of time & effort to make sure it was accurate, precise and to the point to be produced, so if you could opt this answer as the brainliest it would mean the world to me,)
Stay positive and Take care,
A fellow mate,
Cheers !
what are examples of types of chemical markers associated with dna that determines when, where and by how much genes are expressed in each cell?
examples of types of chemical markers associated with dna that determines when, where and by how much genes are expressed in each cell is epigenetic.
When, where, and how much a gene is expressed in a cell depends on the histones and epigenetic elements working together.
Who or what are histone protein factors?Eukaryotic cells have proteins called histones that serve two purposes. They help keep DNA compact and control the loosening and tightening of the DNA strands that control gene expression.
How do epigenetic factors work?Epigenetic factors are substances that alter genes to control how they are expressed. Both changes are not inheritable and do not lead to mutations. These include transient changes such as DNA remodeling, methylation and alkylation.
The field of epigenetics deals with stable phenotypic changes that are not caused by changes in the DNA sequence. Epigenetics, a name derived from the Greek prefix epi-, refers to traits that are 'above' or 'additional' to the conventional genetic base.
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As the moon orbits the ______________, its gravitational pull is______________ on the side of the earth closest to the ______________.This ______________ force pulls on the water facing the moon,creating a ______________. The moon also ______________ on the solidearth, causing the water on the far side of earth to ______________as well. These bulges in the water are the ______________.The areas in between the close and far side of the earth which are not in ______________ with the moon experience ______________.
pls help i give brainlyest
Answer:
Earth
Strongest
Moon
Gravitational
Tide
Pulls
Bulge
Waves
Proximity
Low Tide
How many atoms are in 3.2 moles of KCl? (show work if you can plz)
Answer:
I really hope this helped❤
Explanation:
welll, in chemistry and physics, the Avogardo constant is the number of constituent particles, usually atoms or molecules that are contained in the amount of substance given by one mole and is equal to 6.02 × 10**23. so 3 moles of carbon atoms would be 18.06 × 10**23.
PLSSSSSSSS ANSWERRRRR
A ga i compreed from an initial volume of 5. 50 L to a final volume of 1. 20 L by an external preure of 1. 00 bar. During the compreion, the ga releae 128 J of heat. What i the change in internal energy of the ga?
The change in internal energy of the gas is 123.7 J.
The change in internal energy of a gas can be calculated using the equation: ΔU = Q - W, where ΔU is the change in internal energy, Q is the heat added to or removed from the gas, and W is the work done on or by the gas.
In this case, the work done on the gas can be calculated as W = P * ΔV, where P is the pressure and ΔV is the change in volume. Since the pressure is 1.00 bar and the change in volume is 5.50 L - 1.20 L = 4.30 L, the work done on the gas is W = 1.00 bar * 4.30 L = 4.30 J.
Therefore, the change in internal energy of the gas is ΔU = Q - W = 128 J - 4.30 J = 123.7 J.
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coumarins are a group of widely used laser dyes that emit blue-green light. below are the different coumarin derivatives. what specific characteristic in these molecules is responsible for the observed fluorescence of coumarin derivatives?
The specific characteristic in coumarin derivatives that is responsible for their observed fluorescence is the presence of a conjugated pi electron system in their molecular structure. This pi electron system allows for absorption of light energy, which is then emitted as fluorescence in the blue-green range.
Coumarins are a group of widely used laser dyes that emit blue-green light due to their fluorescence properties. The specific characteristic in coumarin derivatives responsible for the observed fluorescence is the presence of a conjugated π-electron system. This system allows for the absorption of energy and subsequent emission of light when the excited electrons return to their ground state, resulting in the blue-green fluorescence.
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Compare fires to explosions. What is one main difference between these two occurrences?
In fire, the energy released is slower as compared to the explosion in which the energy released is faster and more damaging.
Fires and Explosions are phenomena that releases a high amount of heat and light into their surrounding. Both of them causes the surroundings to burn down if they are not performed or caused in a controlled environment.
However, the main difference between the two is the rate at which the energy is released. In a fire, the energy which is released be it heat energy or light energy, the energy is released slowly through combustion as compared to explosions. Fires basically involve a sustained combustion process.
In an explosion the energy that is released at an extreme rate, it creates shockwaves that can cause damage significantly to its surrounding. Explosions are a one-time event.
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A student found the percent composition of CO to be 50% C and 50% O. What did the student do Incorrectly? What is the percent composition of CO?
PLEASE HELP!!
Consider the following intermediate chemical equations.
C(s) + O2(g) → CO2(g) AH, --393.5kJ
2CO(g) + O2(g) → 2CO2(g) AH, --566.0kJ
2H2O(g) → 2H2(g)+O2(g) AH2 - 483.6 kJ
The overall chemical equation is C(s) + H2O(g) → CO(g) +H2(g). To calculate the final enthalpy of the overall chemica
equation, which step must occur?
Reverse the first equation, and change the sign of the enthalpy. Then, add.
O Reverse the second equation, and change the sign of the enthalpy. Then, add.
O Multiply the first equation by three, and triple the enthalpy. Then, add.
O Divide the third equation by two, and double the enthalpy. Then, add.
Answer:
answer is option 2 hope it helps
The step that must be occurred in the calculation of the enthalpy of the given reaction is option B, reverse the second equation, and change the sign of the enthalpy, then add.
What is enthalpy of a reaction ?The enthalpy of a reaction is the heat energy absorbed or released by the reaction system. For a reaction, the reaction enthalpy can be calculated using the enthalpies of the component reactions.
Here the overall reaction is the formation of CO and H₂ from C and water. The first step is to reverse the second equation and change sign of enthalpy and double the first equation. Then add them, so that the CO₂ get eliminated.
Then, the resultant equation is halved again. Then divide the third equation by two and its enthalpy value also divided by 2. Then add it to the previous one and we get the net equation and corresponding reaction enthalpy.
Therefore, the step that must occur here is option B.
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SOMEONE HELP I FEEL LIKE IM RIGHT AM I???
A solid metal sphere has a radius of 3.53 cm and a mass of 1.796 kg. What is the density of the metal in g/cm^3? (The volume of sphere is V = 4/3 pi r^3.) a) 34.4 g/cm^3 b) 0.103 g/cm^3 c) 121 g/cm^3 d) 9.75 g/cm^3
The density of the metal sphere is 9.75 g/cm³ (Option D).
To find the density of the metal sphere, we can use the formula for density, which is density = mass/volume. First, we need to find the volume of the sphere using the given formula V = 4/3 π r³, where r is the radius of the sphere. Then, we can convert the mass of the sphere to grams and use the formula to find the density.
Given radius (r) = 3.53 cm and mass = 1.796 kg.
1. Calculate the volume of the sphere:
V = (4/3) * π * (3.53)³
V ≈ 184.3 cm³
2. Convert the mass to grams:
1 kg = 1000 g
Mass = 1.796 kg * 1000
Mass = 1796 g
3. Calculate the density:
Density = Mass/Volume
Density = 1796 g / 184.3 cm³
Density ≈ 9.75 g/cm³
Therefore, the density of the metal in the sphere is approximately 9.75 g/cm³.
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The process of wearing down by friction-like sand blasting is called
O exfoliiation
O erosion
O Wind Abrasion
O deposition
Answer:
Erosion
Explanation:
Abrasion is a process of erosion which occurs when material being transported wears away at a surface over time. It is the process of friction caused by scuffing, scratching, wearing down, marring, and rubbing away of materials. ... Objects transported in waves breaking on coastlines cause abrasion.
Which statement correctly describes soil horizon C?
Answer:
Explanation:
It is the horizon that contains the least humus.
The mass number is equal to the number of blank in the nucleus of the atom
Answer:
c
Explanation:
explain how both hydrogen and carbon have achieved stability by bonding with each other to form methane
A carbon iota can bond with four other iotas and is just like the four-hole wheel, whereas an oxygen iota, which can bond only to two, is just like the two-hole wheel.
Each element tries to achieve stability by forming a noble gas configuration (2 or 8 valence electrons)
Carbon has 4 valence electrons, achieving stability requires 4 more electrons
Hydrogen has 1 valence electron, achieving stability requires 1 more electron
Carbon and hydrogen bond covalently by sharing their electrons so that they become stable (carbon binds 4 hydrogens) to form CH₄ (methane)
HELP ME PLEASE. Each answer needs to be one paragraph. 1. Do burning fossil fuels and the CO2 levels in the atmosphere correspond at all? 2. Do cars affect global warming? 3. Do greenhouse gasses affect global warming?
What is the primary difference between a chemical and physical change?
Answer:
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.
Explanation:
calculate the free energy change for the following reaction and predict whether the reaction occurs spontaneously at 25c.
H_2(g) + CO_2(g) rightarrow H2 O(g) + CO(g); Delta H degree = 41.8 kJ and Delta S degree = 42.1 J/k
As ΔG > 0, the reaction is not spontaneous at 25°C.
To calculate the free energy change for the reaction, we can use the equation:
Delta G degree = Delta H degree - TDeltaS degree
where T is the temperature in Kelvin.
Substituting the given values:
Delta G degree = 41.8 kJ - (298 K)(42.1 J/K) / 1000 J/kJ
Delta G degree = 29.5 kJ/mol
However, it's important to note that the spontaneity of a reaction can be influenced by factors such as pressure, concentration, and temperature. The calculated Delta G degree value only represents the conditions under a standard state (1 atm pressure, 1 M concentration, and a specified temperature).
If the reaction conditions deviate from the standard state or if the reaction is carried out under different conditions, the actual spontaneity of the reaction may differ. Therefore, while the calculated Delta G degree suggests that the reaction is not spontaneous under standard conditions, the actual spontaneity can be influenced by external factors and conditions other than those accounted for in the standard state.
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If you have 10 protons and 11 neutrons, in a electrically neutral atom, How many electrons would you have?
Answer:
Well, you'd have 1 electron more than protons (since there are 10 protons and 11 electrons). So the previously neutral ion has now become an ion with a -1 charge
In designing the experiment, the researchers used which type of 32p labeled atp?.
In designing the experiment, the researchers used Y32P-ATP.
What is ATP?Adenosine triphosphate (ATP) is an organic substance and a hydro-trope that provides energy for a variety of functions in
living cellsincluding muscular contractionnerve impulse propagationcondensate dissolvingand chemical synthesisResearchers used Y32P-ATP Because the Y-phosphate of ATP is used for phosphoryl transfer by kinases. As a result, Y32P-ATP is required for the experiment.
Hence the used ATP is Y32P-ATP.
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Facilitated diffusion is used to transport
sugars and amino acids.
H2O and O2.
CO2 and O2.
CO2 and H2O.
sugars and H2O.
Water(h2o), carbon dioxide(co2), and oxygen(o2) can move through a plasma membrane by simple diffusion.
What is simple diffusion in plasma membrane?Na+ is the substance which would have the most trouble crossing a biological membrane through diffusion.Consider substances like carbon dioxide and oxygen (O2) that can easily travel through the lipid bilayer of a cell membrane (CO2). These minute, lipid-soluble gas molecules and other small particles can diffuse in the membrane and migrate along a gradient of concentration to enter or exit the cell.Simple diffusion is a type of passive transport where molecules move across a cell membrane from This is the movement of a substance from a region of higher concentration to that of a lower concentration.Polar and charged substances typically have most difficulty passing through a lipid bilayer due to repulsive actions thereby making option D the most appropriate choice.one side where they are more concentrated to the other. O2 often diffuses into cells because it is more concentrated outside of them, and CO2 usually diffuses out of cells because it is more concentrated inside.Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.To learn more about amino acids refer to:
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A sample of crystalline compound when heated in an open test tube, produced several droplets of water on the upper part of the test tube. When the residue is dissolved in water, a yellow brown solution is formed. In contrast to The colorless solution formed when a sample of the original compound is dissolved in water. what evidence would lead you to conclude that the compound is not truly hydrate
To be considered a true hydrate, a compound must follow a few rules, and one of these rules is the color being the same before and after heating. In this case we have a difference in the color, the residue after heating when dissolved in water is forming a yellow brown solution, and in the meanwhile, a colorless solution is formed when a sample of the original compound is dissolved in water, which is not a characteristic of a true hydrate.