Answer:
Mechanical Sound Waves
A mechanical wave is a wave that depends on the oscillation of matter, meaning that it transfers energy through a medium to propagate. These waves require an initial energy input that then travels through the medium until the initial energy is effectively transferred. Examples of mechanical waves in nature include water waves, sound waves, seismic waves and internal water waves, which occur due to density differences in a body of water. There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves.
Why is sound a mechanical wave? Sound waves move through air by displacing air particles in a chain reaction. As one particle is displaced from its equilibrium position, it pushes or pulls on neighboring molecules, causing them to be displaced from their equilibrium. As particles continue to displace one another with mechanical vibrations, the disturbance is transported throughout the medium. These particle-to-particle, mechanical vibrations of sound conductance qualify sound waves as mechanical waves. Sound energy, or energy associated with the vibrations created by a vibrating source, requires a medium to travel, which makes sound energy a mechanical wave.
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A solution is 5.00% by volume of ethanol dissolved in water. How many mL of ethanol are in 500 mL of the solution?
Answer:
[tex]v_{solute}=25mL[/tex]
Explanation:
Hello there!
In this case, according to the by-volume concentration of this solution, it is possible for us to use its mathematical definition as shown below:
[tex]\%v=\frac{v_{solute}}{v_{solution}}*100\%[/tex]
Thus, given the percent and the volume of the solution, we can solve for the volume of ethanol (solute) as shown below:
[tex]v_{solute}=\frac{\%v*v_{solution}}{100\% }\\\\v_{solute}=\frac{5.00\%*500mL}{100\%}\\\\ v_{solute}=25mL[/tex]
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What number should be in front of O2 to balance the equation?
Answer:
There are now two oxygen atoms on the left and four on the right (in one N2O and three H2O's), so we balance the oxygen atoms by placing a 2 in front of the O2.
The numbers before atoms are the coefficients, and they are used to balance chemical reacions. In the provided example, number in front of O₂ is 3.
Note: Since I do not have the proposed reaction, I provided a random example.
What is a balanced chemical reaction?A balanced chemical reaction is an equation in which the number and type of atoms are the same on both sides of the arrows.
Following the law of mass conservation, chemical equations should be balanced to ensure that all the reactants appear in the products.
This means that no new atoms appear, and no atoms disappear. The only thing that changes in a chemical reaction is the bond between atoms.
So each side of the equation must be equilibrated concerning the amount and type of atoms.
Coefficients are used to balance reactions. These numbers are located before each atom and indicate the number of units present in the formula.
I do not have the proposed reaction, but I will provide an example using O₂.
4Al + _3_O₂ → 2 Al₂O₃Reactants ⇒ 4 Al and 3 O₂
3 O₂ = 6 O
Products ⇒ 2 Al₂O₃
2 Al₂ = 4 Al
2 O₃ = 6 O
On each side of the equation we have 4 Al and 6 O. The only thing that changes are the bonds between atoms.
In this case, the coefficient of O₂ is 3.
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What characterizes a radioactive atom?
A. Its nucleus is unstable.
O B. Its nucleus has too few quarks.
O C. Its electrons gain energy.
O D. Its protons repel the neutrons.
. Its nucleus is unstable.
Its nucleus is unstable. This characterizes a radioactive atom. Therefore, the correct option is option A.
What is radioactive atom?The smallest parts of common stuff that can be separated without releasing electrically charged particles are called atoms. The atoms are divided into two sections. an electron cloud and an atomic nucleus. Atoms with an unstable nucleus and the potential for radioactive decay are referred to as radioactive atoms.
As only nuclei often experience decay and changes with electron configuration only come from nucleus configuration changes, the term "radioactive atom" is misleading. This isn't a rule, it must be said. As a parent nucleus needs capture any of its orbital electrons, the electron cloud also plays a significant role in the case of electron capture. Its nucleus is unstable. This characterizes a radioactive atom.
Therefore, the correct option is option A.
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In balancing a chemical equation, which of the following are you allowed to do?
A) change coeffecients
B) change superscripts
C) change subscripts
D) add new substances
Answer:
Change Coefficients
Thank you
ЗKOH + H3PO4=K3PO4 + 3H2O
what is the reaction
Answer: The given reaction is a neutralization reaction.
Explanation:
When an acid chemically reacts with a base then it leads to the formation of salt and water.
For example, [tex]3KOH + H_{3}PO_{4} \rightarrow K_{3}PO_{4} + 3H_{2}O[/tex]
Here, KOH is a the base and [tex]H_{3}PO_{4}[/tex] is an acid which on chemical reaction with each other leads to the formation of salt [tex](K_{3}PO_{4})[/tex] and water [tex](H_{2}O)[/tex].
Thus, we can conclude that the given reaction is a neutralization reaction.
The extraction of zinc from zinc blend and explain how the zinc oxide be reduced using Carbon monoxide Electrolysis
Answer:
Zinc blend is Zinc sulphide, ZnS.
ZnS is roasted in air producing ZnO and Sulphur dioxide.
ZnO is reduced to Zn by CO.
Further purification is done by electrolysis.
which substance has more particles 1 mole of gold or 1 mole of water explain your answer .
Answer:
Neither of them have more particles than the other.
Explanation:
Neither of them have more particles than the other because;
1 mole of any substance usually contains 6.022 × 10^(23) atoms/molecules/particles of that very same substance.
Thus, it will be the same value for Gold (Au) and water(H2O).
Cuántos gramos de cloruro de magnesio se pueden obtener si se hacen reaccionar 354,9g de cloruro de titanio (IV) y 285g de magnesio puro, Recuerde que como productos obtiene titanio y cloruro de magnesio.
a. escriba la ecuación balanceada
b. determine el reactivo limite
c. La cantidad de reactivo en exceso
Answer:
sorry I dont speak Spanish
When 25.5 grams of a molecular substance is dissolved in 225g benzene, the solution begins to freeze at -5.05C. Calculate the molar mass of this solute (I need to understand the work, and look at the image attached for the key for benzene.
Answer:
here :). hope this helps.
A natural levee is _____.
A. an erosional feature that causes additional sediment to enter the river
B. a depositional elongated ridge formed by moving water that runs parallel to a stream channel
C. an elongated ridge designed by engineers that runs parallel to a stream channel
D. the result of wind erosion
Answer:
Option C, an elongated ridge designed by engineers that runs parallel to a stream channel
Explanation:
A natural or artificial levee is basically a ridge constructed along a river bank to regulate the water level in the stream.
It run along the river embankment and hence can be said that it runs parallel to the river length
Hence, option C is correct
Which contains more carbon 4.71 g of C6H12O6 or 5.85 g C2H6O?
Answer:
5.85 g C2H6O has more carbon
Explanation:
Weight of carbon in 4.71 g of C6H12O6
[tex]4.71 * 12.01\\56.5671\\[/tex] grams
Weight of carbon in 5.85 g of C2H6O
[tex]5.85 * 12.01\\70.259\\[/tex] grams
Hence, 5.85 g C2H6O has more carbon
Help! Please and thank you
Answer:
0.20 M
Explanation:
Molarity is the concentration of a solute (MgCl2) in our solution (water). Molarity tells us how many moles of a substance is per Liter. So to figure out Molarity we'll break it down to this formula: Molarity = [tex]\frac{moles}{Liter}[/tex].
We can get moles by converting it from grams -> moles by using the molar mass, which is measured in grams/mol, that is our stepping stone to moles.
The molar mass is the sum of all the substances in the compound, so you'll need to refer to the periodic table.
Molar mass: (24g Mg) + ( 2 x 35g Cl)= 94g
Moles of MgCl2: 45.7g MgCl2 x [tex]\frac{1 mol}{94g MgCl2}[/tex] = 0.49 mol MgCl2
1 kg of water = 1 L so we don't have to convert anything, we can just use 2.40 L.
Molarity of MgCl2: [tex]\frac{0.49 mol MgCl2}{2.40 L}[/tex] = 0.20M
How many liters of water vapor is produced when 33.4 moles of gaseous ammonia is reacted in the following reaction? Hint: Convert to moles first
Answer:
4 liters I think actually hold on
the answers that can be written down are at the bottom
Answer:
increasing / protons / periods / groups / center / far right / similar
Which of the following does not describe a solid
Answer:
water is not a solid and a rock is a solid
Three moles of oxygen gas is stored in a 2.5-liter container at 35°C. What is the pressure of this gas?
Answer:
30.34 atm
Explanation:
Using the general gas law formula;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
T = temperature (K)
R = gas law constant (0.0821 Latm/molK)
According to the information provided in this question,
n = 3mol
T = 35°C = 35 + 273 = 308K
V = 2.5L
P = ?
Using PV = nRT
P = nRT/V
P = 3 × 0.0821 × 308/2.5
P = 75.8604 ÷ 2.5
P = 30.34 atm.
How many oxygen atoms are in 75 g of so3
Explanation:
nso3=75/80 (80=Mr of so3)
n of o= 75x3/80
x of o= 75x3/80x6.02x10 powered by 23
then, the anwer is
[tex] {10}^{23} \times 16.93125[/tex]
sry if im wrong
There are approximately 1.204 x 10²⁴ oxygen atoms in 75 g of SO₃.
To calculate the number of oxygen atoms in 75 g of SO₃, we need to consider the molar mass of SO₃ and Avogadro's number.
The molar mass of SO₃ is calculated as follows:
Sulfur (S) = 32.07 g/mol
Oxygen (O) = 3 x 16.00 g/mol = 48.00 g/mol
Total molar mass of SO₍ = 32.07 g/mol + 48.00 g/mol = 80.07 g/mol
Next, we need to determine the number of moles of SO₃ in 75 g:
moles = mass / molar mass = 75 g / 80.07 g/mol ≈ 0.9369 mol
Since each molecule of SO₃ contains 3 oxygen atoms, we can calculate the number of oxygen atoms by multiplying the number of moles of SO₃ by Avogadro's number (6.022 x 10²³ atoms/mol) and then multiplying by 3:
Number of oxygen atoms = 0.9369 mol x 6.022 x 10²³ atoms/mol x 3 = 1.604 x 10²⁴ atoms
Therefore, there are approximately 1.204 x 10²⁴ oxygen atoms in 75 g of SO₃.
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This is science
Can photosynthesis still take place if plants do not receive enough water from the water cycle? Why or why not?
Answer:
No.
Explanation:
Photosynthesis is the light dependent process which must occur for the plant to live. This process also requires water and carbon dioxide. If photosynthesis does not occur, the plant will die.
If plants do not receive enough water from the water cycle, photosynthesis can be affected, and in severe cases, it may not take place at all.
Why photosynthesis requires water?Photosynthesis requires water as one of its essential inputs, as it is used in the process of creating glucose and oxygen from carbon dioxide and light energy. Therefore, if plants do not receive enough water from the water cycle, photosynthesis can be impacted, and in severe cases, it may not take place at all.
Water is not only a raw material in photosynthesis, but it is also necessary for the regulation of plant cells' internal pressure, which is essential for maintaining their shape and structure. Without enough water, the cells' internal pressure decreases, causing them to shrink and lose their rigidity. This process is known as wilting.
Hence, water is essential for plant growth and photosynthesis, and if plants do not receive enough water from the water cycle, it can lead to wilting, stunted growth, and a reduction in photosynthesis.
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Justify the
the importance of solar enengy as on
alternative source of energy in Nepal
Answer:
Nepal aims to achieve universal access to clean, reliable and affordable renewable energy solutions by 2030. It is expected to reduce dependence on traditional and imported energy by increasing access to renewable energy. The use of solar energy is more reliable than traditional electricity in Nepal.
According to law of conservation of energy,solar energy is a renewable source of energy as it's heat can be converted to other forms of energy and can be conserved and is being looked as an alternative in Nepal.
What is law of conservation of energy?According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.
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What must happen to break a chemical bond?
Energy must be released.
Electrons must be provided.
Energy must be provided.
Answer:
Energy must be provided
Explanation:
Chemical bonds are initially stable, energy is required to break them apart.
I need help on this asp
Answer:
copper or steel
Explanation:
hope this helps
This is Science
How does the process of photosynthesis help the overall life on earth? (Hint: what does it produce that living things need to live?)
Answer: Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.
Explanation:
As molecules increase in electrons, what happens to their melting and boiling points?
Which of these are characteristics of all arthropods? (Select all that apply.)
six legs
segmented bodies
jointed appendages
exoskeleton
Answer:
segmented bodies, jointed appendages, & exoskeleton
Explanation:
Hope you succeed, have a nice day!
Calcium reacts with oxygen to form calcium oxide. Name the
reactants.
Molar mass of 500g of Cl2
Explanation:
What's Your Question ??..
Lichens, a combination of fungi and algae, grow on the surface of rocks. They secrete acids that slowly eat away at the surface of the rock.
Is this an example of chemical or physical weathering?
physical
chemical
Answer:
Chemical
Explanation:
it is a chemical weathering because it is eating away at the rock instead of actively eroding the rock.
pls ans quicckk two q
Answer:
there is nothing here
Explanation:
A gas is collected at 25.0 °C and 755.0 mm Hg. When the temperature is
changed to 0 °C, what is the resulting pressure?
Answer:
691.7 mmHg is the resulting pressure
Explanation:
Tha Gay-Lussac's law states that the pressure of a gas is directly proportional to its absolute temperature under constant volume. The equation is:
P1T2 = P2T1
Where P is pressure and T asbolute temperature of 1, initial state and 2, final state of the gas.
Computing the values of the problem:
T1 = 273 + 25 = 298K
P1 = 755.0mmHg
T2 = 273 + 0 = 273K
P2 = ?
755.0mmHg*273K = P2*298K
691.7 mmHg is the resulting pressureA chemist mixed two substances together: a colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.
Is the ending substance the same substance as the colorless liquid? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions.
Answer:
colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.
Explanation: