Answer:
Hollow bones allow the birds to fly. They're quite dense, and that density allows for flight! Because we humans do not have hollow bones, our bodies are much too heavy to fly on our own. If we did, we'd probably be able to fly.
Explanation:
Identify the examples of experiences. Select three options.
Connie has good hearing ability.
Daryl has visited many other countries.
Alfonso has developed many strong friendships
Thelma has decided to audition for a role in a television show.
Sherry has set a goal of reading fifty books in a year.
Marion has worked at jobs that improved his time-management skills.
i need help!!!
Experience refers to something that happens in a person's life that leaves an indelible mark on the person.
What is an experience?The term experience refers to something that happens in a person's life that leaves an indelible mark on the person.
The following are experiences;
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Answer:
Experience refers to something that happens in a person's life that leaves an indelible mark on the person.
What is an experience?
The term experience refers to something that happens in a person's life that leaves an indelible mark on the person.
The following are experiences;
Daryl has visited many other countries.
Alfonso has developed many strong friendships
Marion has worked at jobs that improved his time-management skills.
Explanation:
Which lists only abiotic factors in this environment?
grass, tree, rock, soil
bird, turtle, grass, tree
sun, water, grass, soil
water, rock, soil, sun
In this case, among the list of components given, the abiotic factors are water, rock, soil, and sun.
What is an abiotic factor?An abiotic factor is a non-living part of an ecosystem that shapes its environment.
Biotic and abiotic factors make up a community via interaction.
Biotic factors are considered living things (having "life") while abiotic factors are simply non-living things.
Hence, in this case, among the list of components given, the abiotic factors are water, rock, soil, sun
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[tex] \begin{gathered}\\ \underline{\boxed{\large\leadsto\frak\red{ Answer :- }}} \\ \end{gathered}[/tex]
In this case, among the list of components given, the abiotic factors are water, rock, soil, and sun.What is an abiotic factor?
An abiotic factor is a non-living part of an ecosystem that shapes its environment.Biotic and abiotic factors make up a community via interaction. Biotic factors are considered living things (having "life") while abiotic factors are simply non-living things. Hence, in this case,♠ Among the list of components given, the abiotic factors are water, rock, soil, sun
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Describe the difference between the rate of diffusion seen for sodium and urea.
PLS I WILL GIVE BRAINLY How do the number of violence electrons of the light metals compared to those heavier than boron
The valence electron of the light metals are all in the range of 1 to 3.
What are Valence electron ?Valence Electron is the number of electrons in the outer shell of an atom which participate in bond formation.
Number of Valence Electron in Boron is 3 and other light metals lighter than Boron have 1 , 2 of Lithium and Beryllium respectively,
The valence electron of the light metals are all in the range of 1 to 3.
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A solution of potassium nitrate is made when potassium nitrate dissolves in water.
Describe a method you could use to obtain crystals of potassium nitrate from
potassium nitrate solution.
You should include an explanation of the process by which the crystals are produced
from the solution.
[6 marks]
Answer:
Boil the water and stir in potassium nitrate. If it doesn't all dissolve, you can cook it on the stove or microwave it until the water boils again. Remove the solution from heat, but let it cool slowly for the best crystal formation.
How do you know which element the little number (subscript) goes with?
Answer:
you will not
Explanation:
the little subscript number just indicates how many of a certain atom is in a molecule... example H₂O... that little ₂ means that there are 2 hydrogen atoms in the water molecule.
there is an invisible ₁ on the O as well. H₂O₁ shows there is one oxygen atom in the water molecule, but we do not show the 1
Answer:
The little number you see to the right of the symbol for an element is called a subscript. That number indicates the number of atoms of that element present in the compound. When balancing an equation, you can change the coefficients but not the subscripts.
Which type of scientist would most likely study how electricity could be
produced more efficiently?
Electrical engineers are the scientists that study the production of electricity more efficient.
Which type of scientist would study how electricity could be produced more efficiently?
Electrical engineers are the type of scientist that would most likely study how electricity could be produced more efficiently because they produced new technologies which are cost efficient as well as produce high amount of electricity.
So we can conclude that electrical engineers are the scientists that study the production of electricity more efficient.
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What is the molarity of 1. 5 liters of an aqueous solution that contains 52 grams of lithium fluoride.
Answer:
1.3 M
Explanation:
The formula mass of lithium fluoride is 7+19=26 g/mol. This means that in 52 grams of LiF, there is 2 moles.
Molarity = (moles of solute)/(liters of solution), so the answer is 2/1.5 = 1.3 M
The conductance of the electric current through the electrolytic solution increases with
a)decrease in dilution
b)increase in dilution
c)increase in concentration
d)low degree of ionization
The conductance of the electric current through the electrolytic solution increases with increase in concentration.
What is an electrolytic solution?An electrolytic solution is a solution containing dissolved electrolyte.
The ions of the electrolyte dissociate and are able to carry electric current around the electrolytic cell.
The higher the concentration of the electrolyte, the more electric current it can conduct due to greater number of ions present.
Therefore, the conductance of the electric current through the electrolytic solution increases with increase in concentration.
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question -What happens to the energy of a wave if the amplitude of the wave is doubled?
The energy carried by the waves depends on the amplitude of the wave. If the amplitude is doubled then the energy gets increased by four times.
What is amplitude?The amplitude of a wave is the distance from the center line to the trough or the crest of the wave. The energy of the wave is directly proportional to the square of the amplitude.
E ∝ A²
So if the amplitude is doubled then E = 4. Hence, the energy gets increased quadruples times. The energy is related to the frequency and the wavelength of the wave that travels.
Therefore, the energy gets increased by four times if the amplitude is doubled.
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I-131 undergoes beta-minus decay. The chemical symbol for the new element is.
The chemical element that is formed when I-131 undergoes beta-minus decay is Xe.
What is a beta minus decay?A beta minus decay is one in which an electron is changed into a proton. The atomic number of the daughter nucleus will increase by one unit and is one place after the parent in the periodic table.
The chemical element that is formed when I-131 undergoes beta-minus decay is Xe.
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What happens when a solid is dissolved into a liquid?
O Solid particles float toward the surface layer of liquid particles.
O Solid particles sink down toward the bottom layer of liquid particles.
O Solid particles become evenly dispersed among liquid particles.
O Solid particles become suspended in the middle of liquid particles.
When a solid dissolves in a liquid to form a solution, solid particles become evenly dispersed among liquid particles.
What are solutions?Solutions are formed when a solute particle dissolves in another substance known as a solvent.
Usually, solutions are formed when solids dissolve in liquids.
The solid is the solute while the liquid is the solvent.
When a solid dissolves in a liquid, solid particles become evenly dispersed among liquid particles.
Therefore, solutions are formed when solute particles dissolve in solvents.
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Answer:
c
Explanation:
chem ed 2022
density is ______ to pressure
Answer:
When pressure increases, density increases.
When the pressure decreases, density decreases.
When density increases, pressure increases.
When density decreases, the pressure decreases.
Explanation:
if energy can neither be created nor destroyed, into what kinds of energy have these resources been transformed?
Answer:
Heat, Sound
Explanation:
I am pretty sure you are addressing mechanical energy and machine efficiency. So you are probably aware a machine can't achieve 100% efficiency because of the first and second laws of thermodynamics. This energy is lost to friction and air resistance. They convert some gravitational potential energy to heat and sound energy rather than all to kinetic energy, and vice versa.
Identify a cation. An atom that has gained a proton. An atom that has lost an electron. An atom that has gained an electron. An atom that has lost a proton.
the answer would be B an atom that has lost an electron
Select the correct answer from each drop-down menu. a 126.1-gram block of granite at 92.6°c is dropped into a tub of water at 24.7°c in an isolated system. the final temperature of both the granite and the water is 51.9°c. the specific heat capacity of granite is 0.795 joules/gram degree celsius, and the specific heat capacity of water is 4.186 joules/gram degree celsius. the granite block transferred of energy, and the mass of the water is .
Taking into account the definition of calorimetry, the mass of water is 35.70 grams.
What is calorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where:
Q is the heat exchanged by a body of mass m.c is the specific heat substance c. ΔT is the temperature variation.Mass of water in this caseIn this case, you know:
For granite:
Mass of granite= 126.1 gInitial temperature of granite= 92.6 °CFinal temperature of granite= 51.9 ºCSpecific heat of granite = 0.795 [tex]\frac{J}{gC}[/tex]For water:
Mass of water = ?Initial temperature of water= 24.7 ºCFinal temperature of water= 51.9 ºCSpecific heat of water = 4.186 [tex]\frac{J}{gC}[/tex]Replacing in the expression to calculate heat exchanges:
For gold: Qgranite= 0.795 [tex]\frac{J}{gC}[/tex] × 126.1 g× (51.9 °C - 92.6 °C)
For water: Qwater= 4.186 [tex]\frac{J}{gC}[/tex]× mass of water× (51.9 °C - 24.7 °C)
If two isolated bodies or systems exchange energy in the form of heat, the quantity received by one of them is equal to the quantity transferred by the other body. That is, the total energy exchanged remains constant, it is conserved.
Then, the heat that the gold gives up will be equal to the heat that the water receives. Therefore:
- Qgranite = + Qwater
- 0.795 [tex]\frac{J}{gC}[/tex] × 126.1 g× (51.9 °C - 92.6 °C)= 4.186 [tex]\frac{J}{gC}[/tex]× mass of water× (51.9 °C - 24.7 °C)
Solving:
4,080.15465 J= 4.186 [tex]\frac{J}{gC}[/tex]× mass of water× 27.3 °C
4,080.15465 J= 114.2778 [tex]\frac{J}{g}[/tex]× mass of water
mass of water= (4,080.15465 J)÷ 114.2778 [tex]\frac{J}{g}[/tex]
mass of water= 35.70 grams
Finally, the mass of water is 35.70 grams.
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Based on Charles's law, which of the following statements is true for an ideal gas at a constant pressure and mole amount?
The number of collisions is independent of volume.
The number of collisions decreases with increase in volume.
Volume is directly proportional to absolute temperature.
Volume is inversely proportional to absolute temperature.
Answer:
the number of collisions is independent of Volume.
Based on Charles's law, an ideal gas at a constant pressure and mole amount is " the number of collisions is independent of volume."
What is Charles's law?Gases have a propensity to expand while heated, according to Charles' law, an innovative gas law.
What is collisions?A collision would be any situation in where two or even more bodies quickly number of factors on one another.
Based on Charles's law, an ideal gas at a constant pressure and mole amount is " the number of collisions is independent of volume."
Therefore, the correct answer will be option (A).
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Avogadro’s number is the number of particles in one mole of a pure substance, true or false?
Answer: The answer is true.
Explanation: Avogadro's number is a mole, which concludes that this statement is true.
how can you explain that even though you continue to add pure water into a substance, even though the resultant ph might differ a little, the acidity or alkalinity of substance still remains the same to that of substance?
Addition of pure water does not change pH of a solution because pure water has neutral pH.
Why the pH does not change when pure water is added?Even though you continue to add pure water into a substance, the acidity or alkalinity of substance still remains the same to that of substance because pure water has neutral pH which can't change the acidity or alkalinity of a solution.
So we can conclude that addition of pure water does not change pH of a solution because pure water has neutral pH.
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What mass of Na2CO3 will be required to dissolve in 0.3 L of water to make a 0.5 M solution?
The mass of [tex]Na_2CO_3[/tex] that will be required to be dissolved in water would be 15.9 grams
Solution preparationRecall that: molarity = mole/volume in L
In this case, the volume is 0.3 L and the molarity is 0.5 M.
Thus, mole = molarity x volume = 0.5 x 0.3 = 0.15 moles
Mass of 0.15 moles [tex]Na_2CO_3[/tex] = 0.15 x 106 = 15.9 grams
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You can make a solution (solid solute) more concentrated by
adding more solute
O increasing the pressure
adding more water
adding more solvent
Answer:
increasing the pressure
Explanation:
You can make a solution more concentrated by increasing the pressure.
a student used a vernier magnetic field sensor to measure the strength of the magnetic field generated by a bar magnet. at which position is the
strength of the magnetic field strongest point a or point b?
The position is the strength of the magnetic field strongest is is the place where the magnetic field leaves, being point A.
What generates a magnetic field?When an electrically charged particle moves, it creates a magnetic field. According to the laws of electromagnetism, this magnetic field originates from the variation of the electric field strength.
In the region of the poles we see that the lines of magnetic induction are closer to each other, therefore, we consider that close to the poles the magnetic field is more intense.
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How many particles would be found in a 12.7g sample of ammonium carbonate?
answer choices are:
2.9 x 10^22 particles
7.96 x 10^22 particles
i cannot get it, please help
multiplying terrorist to power 23, divided by 96. Multiplied by 12.7. so this is 76.48
7.96 x 10²² particles would be found in a 12.7g sample of ammonium carbonate. A particle is a tiny, localized item.
What is particles in chemistry?A particle is a tiny, localized item that may be defined by a number of physical or chemical characteristics, including volume, density, and mass. They range significantly in size or number from tiny particles like atoms to subatomic particles such as the electron.
Depending upon their density, particles can potentially be utilized to mimic even bigger things, such as moving celestial bodies or a throng of people. Although the meaning of the word particle is quite broad, different scientific disciplines might refine it as necessary. Any substance made up of particles is referred to as a particulate.
number of moles = given mass/ molar mass
= 12.7/ 96.08
= 0.13moles
number of particle= 0.13 × 6.022×10²³
= 7.96 x 10²²
Therefore, 7.96 x 10²² particles would be found in a 12.7g sample of ammonium carbonate.
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What differences do you notice when you heat up the brick and the iron at same temperature?
After heating the brick and the iron, it is observed that the brick heats up quicker and the brick releases energy quicker.
What is thermal energy?Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other.
The iron has more energy than the brick even though it is at the same temperature. That means that the iron must have more particles than the brick.
Iron and brick are both solids and have the same volume, so the difference in total energy must be due to atomic composition.
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If 0.094 moles of magnesium react with excess oxygen, how many moles of magnesium oxide would be formed?
The equation for this reaction is
[tex]\text{Mg}+\text{O} \longrightarrow \text{MgO}[/tex]
This means that for every mole of magnesium consumed, 1 mole of magnesium oxide is produced.
So, the answer is 0.094 moles.
V2 = (P1 × V1 × T2) (P2 × T1) A gas with a beginning pressure of 2 atm at a temperature of 300 K has a volume of 20 ml. What will be the new volume if the pressure increases to 4 atm and the temperature is lowered to 200 K?
6.6ml will be the new volume if the pressure increases to 4 atm and the temperature are lowered to 200 K.
What is an ideal gas equation?The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).
Given data:
[tex]V_1=20 ml[/tex]
[tex]T_1=3[/tex]
[tex]P_1=2 atm[/tex]
[tex]T_2=200 K[/tex]
[tex]P_2=4 atm[/tex]
[tex]V_2=?[/tex]
Using equation:
[tex]V_2 =[/tex] [tex]\frac{P_1 X V_1 XT_2}{P_2 X T_1}[/tex]
[tex]V_2 =[/tex][tex]\frac{2 atm X 20 ml X200 K}{4 atm X 300 K}[/tex]
[tex]V_2 = 6.6 ml[/tex]
Hence, 6.6ml will be the new volume if the pressure increases to 4 atm and the temperature are lowered to 200 K.
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Pls show working too... thanks!!
The maximum volume of hydrogen evolved at room temperature and prressure after taking excess zinc with 0.01 mol HCl is 2.4 [tex]dm^{3}[/tex]
hence correct option is (C)
What is Ideal gas law ?According to this law, the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.
Given Equation ;
Zn + 2HCl --> [tex]ZNCl_2[/tex] + [tex]H_2[/tex]
Given Quantities ;
Amount of Zinc = Excess
Amount of 1.0 mol/ltr HCl = 100 ml
It means, Number of moles of H = 0.1 mole
Temperature = 298 K
Pressure = 1 Atm
This is a “single state” problem, so we can solve it using the ideal gas law, PV = nRT.
therefore, using Ideal gas equation ;
PV=nRT
1 x V = 0.1 x 0.0821 x 298
volume of hydrogen gas = 2.4 litre ie, 2.4 [tex]dm^{3}[/tex]
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An atom has eight protons and nine neutrons. draw the atomic structure of the atom
An atom has eight protons and nine neutrons. The atomic structure of the atom is attached below in image.
What is an atomic structure ?The term "atomic structure" describes the structure of an atom, which has a nucleus that contains both protons and neutrons . The centre of the nucleus is circled by the negatively charged electrons.
The smallest piece of ordinary matter within an element is called an atom. Protons, neutrons, and electrons are the three subatomic particle types that make up an atom.
An isotope's number is equal to the sum of its protons plus neutrons since their masses are almost identical. Oxygen 16 therefore has 8 protons and 8 neutrons, followed by oxygen 17 with 8 protons and 9 neutrons, and oxygen 18 with 8 protons and 10 neutrons.
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For which process would the pictured cell be used?
Producing electricity
Splitting a compound into its elements
Purifying a metal
Coating a material with metal
Answer:
Coating a material with metal
(SInce the glasses will be coated with gold.)
if this strand is replicated what is the complementary strand that is produced
Answer:
During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied. The new strand will be complementary to the parental or “old” strand. Each new double strand consists of one parental strand and one new daughter strand.
Explanation:
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