The rate constant for the nuclide according to first-order kinetics is 0.3863 per day.
Nuclear Decay in First-Order Kinetics:
m(t) = Me∧(-αt)
where m(t) = mass of nuclide after decay at time t;
M = mass of nuclide before decay;
α = rate constant of decay;
t = time for the decay;
What is first-order kinetics?When a fixed percentage of the drug is excreted per unit of time, this is known as first-order kinetics.
For example, The amount of drug in the body has a direct relationship to the rate of removal. The amount of medication eliminated per unit of time increases with concentration. The medication concentration decreases by 50% for each half-life.
Now,
m(t) = Me∧(-αt)
⇒e∧(αt) = M/m(t)
applying ln on both sides;
αt = ln(m/m(t))
α = (ln(m/m(t))/t)
here t= 3.4 days, M = 45 grams, m(t) = 12.1 grams;
dropping these values in the above equation we get,
α = 0.3863 per day;
The rate constant for the nuclide according to first-order kinetics is 0.3863 per day.
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PLS ANSWER ASAP
How are natural resources managed for maximum usability and sustainability?
1. What is the charge of an atom with 20 protons and 18 electrons
When the balloon is released, air is pushed out by the balloon. Which other force is acting that demonstrates Newton's third law of motion?
The released air produces an equal force in the opposite direction of the motion of the air, which causes the balloon to move forward in accordance with Newton's Third Law of Motion.
What forces are at play when you release the balloon?As the balloon climbs, friction develops between the moving balloon and the air molecules it encounters. In opposition to the lift, drag and gravity's pull on the balloon's mass both exert downward forces. The balloon rises if the lift is greater than the drag and gravity's pull. One component of the force pair is the force of the balloon on the air, and the other component is the force of the air on the balloon.
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which of the following is a neutralization reaction? question 15 options: cao h2o --> ca(oh)2 co2 h2o --> h2co3 hno3 koh --> kno3 h2o 2 na cl2 --> 2 nacl
This reaction is neutralization reaction.
2HNO3+2KOH⇒ 2KNO3+2H2O
What is neutralization reaction?
A neutralization reaction is a type of chemical reaction in which an acid and a base react with one another to form a salt and water. The acid and the base each donate one or more protons (H+ ions) to form a neutral compound. This type of reaction is important in many everyday applications, from the neutralization of stomach acid to the processing of industrial waste.
Acid+Base⇒Salt+Water
The given reaction is neutralization reaction because potassium nitrate salt is formed, and water is produced.
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Mr. Chemistry added 1.6 g of NaOH to 50.0 mL of water. What is the concentration of his solution? (molar mass NaOH = 40.0 g/mol)
The concentration of the solution to which Mr. Chemistry added 1.6grams of NaOH solution is 0.08M.
How to calculate concentration?Molarity or concentration of a solution is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
The molarity of a solution can be calculated by dividing the number of moles in the solution by the volume as follows:
molarity = no of moles ÷ volume
moles = 1.6g ÷ 40g/mol = 0.04mol
molarity = 0.04 moles ÷ 0.500L
molarity = 0.08M
Therefore, 0.08M is the molarity of the solution.
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absolute zero is the temperature at which an ideal gas would have _____ volume. this temperature corresponds to _____ °c celsius and _____ k.
Absolute zero is the temperature at which an ideal gas would have 0 volume. This temperature corresponds to -273.15 °C celsius and 0 K.
Definition of Ideal gas
A theoretical gas composed of many randomly moving point particles that are not subject to interparticle interactions is known as an ideal gas. The ideal gas concept obeys the ideal gas law, a simplified equation of state, and is amenable to analysis under statistical mechanics, hence it is so useful.
Absolute zero temperature for an ideal gas
The theoretical temperature for al ideal gas is determined by extrapolating the ideal gas law; by international agreement, absolute zero is taken as −273.15 degrees on the Celsius scale.
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A given sample of n2 gas has a pressure of 0. 30 atm at 30. 0 °c. If the volume is 2. 0 l, how many moles of n2 are present?.
0.0781 mol of N2 would be there at a pressure of 0.3atm at 30°C
How does Avogadro's number help you discover moles?Avogadro's number can be used to convert between molecules and moles by multiplying or dividing: The amount of moles must be multiplied by 6.02 x 1023 to convert to molecules. Divide the number of molecules by 6.02 x 1023 to convert it to moles.
How to find number of moles?At STP defined as 0°C (273.15 K, 32°F) and 1 atm, the molar volume of a gas is 22.414 L/mol.
Use dimensional analysis to calculate the moles of nitrogen in 1.75 L at STP.
1.75 L N₂ × 1 mol/22.414 L = 0.0781 mol N₂ to three 2 significant figures.
How much is a mole?A mole is 6.02214076 x 1023 of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful unit to use.
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ans fast plss i have due in 2 hours
refer the pic above for answer
If a sample has 28g nitrogen and 64g oxygen, what is the empirical formula?
Considering the definition of empirical formula, if a sample has 28g nitrogen and 64g oxygen, the empirical formula is NO₂.
Definition of empirical formulaThe empirical formula is an expression that represents the atoms that make up a chemical compound regardless of its structure. It is therefore the simplest representation of a compound.
The empirical formula indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms.
Empirical formula in this caseIn this case, in first place you need to convert the number of grams given into percentage as follow, being the mass of the sample 92 grams (mass of nitrogen + mass of oxygen):
Nitrogen (N): (28 g÷ 92 g)× 100%= 30.43%Oxygen (O): (64 g÷ 92 g)× 100%= 69.57%Assuming a 100 grams sample, the percentages match the grams in the sample. So you have:
Nitrogen (N): 30.43 gramsOxygen (O): 69.57 gramsThen it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:
Nitrogen (N): 30.43 grams÷ 14 g/mole= 2.17 moles
Oxygen (O): 69.57 grams÷ 16 g/mole= 4.35 moles
The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:
Nitrogen (N): 2.17 moles÷ 2.17 moles= 1
Oxygen (O): 4.35 moles÷ 2.17 moles= 2
Therefore the N: O mole ratio is 1: 2
Finally, the empirical formula is N₁O₂= NO₂.
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The land Masses Of South America, Africa, India, and Australia seem to fit together like puzzle pieces. The theory of continental drift suggests that these four lands were once one large mass of land until they broke apart and drifted to their current positions. Which of these statements does not support this theory?
A,) In 1944, Geologist B. Willis Says it seems impossible that the continents could move.
B.) in 1558 Geologist E. Suess Points out that the same plant fossils plant fossils plant are found in the southern parts of Africa, South America, Australia, Antarctica,&India
C.) In 1927, Geologist A. DU Toit Discovers An Almost Identical Sequence Of Rock Layers on the eastern coast of Soth America And the Western Coast Of Africa
D.) In 1965, Geologist E Bullard Uses computers to successfully match the coasts of South America and Africa
HELP THIS IS DUE IN FOUR DAYS
In the early 20th centaury, scientist Alfred Wagner proposed the theory of continental drift on which each continents are formed as they are now through the drifting of tectonic plates. However concepts of Geologist . B. Williams does not support this.
What is continental drift?A ground-breaking idea that explained how continents move around on the surface of the earth was known as continental drift. Alfred Wegener, a geophysicist and meteorologist, first suggested the theory in 1912, however it was later disproved by the majority of scientists.
Some of Wegener's theories were eventually proven by scientists and are now a part of the generally recognized theory of plate tectonics .The concept of drifting continents was first proposed in geoscience by Wegener's continental drift theory.
He asserted that the earth must have once been a single supercontinent before fragmenting into numerous separate continents. This clarified how related rock formations and fossilized plants and animals might survive on different continents.
However, the concept of B. Williams does not supports the drifting theory and he proposes that movement of continents is impossible. Thus, option A is correct.
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2. what is the nuclear binding energy of silver-110 in units of j/nucleon? the mass of a silver- 110 nucleus is 109.90611 amu.
The nuclear binding energy of silver is 1.5E-24 j/nucleon where the mass of a silver is 110
Formula used
Binding Energy per Nucleon = (Mass Defect×931.5)/Mass Number
B.E per nucleon = (∆m×931.5)/A
The bare minimal amount of energy needed to separate an atom's nucleus into its component protons and neutrons—collectively referred to as nucleons—is known as the nuclear binding energy in experimental physics. For stable nuclei, the binding energy is always positive since the nucleus needs to gain energy for the nucleons to move apart from one another. The strong nuclear force pulls nucleons toward one another. The nuclear binding energy is thought to be negative in nuclear physics theory. When the constituent nucleons are infinitely far apart from one another, it shows the energy of the nucleus in relation to their energies. With slightly differing emphasis on what the binding energy signifies, the experimental and theoretical points of view are equivalent.
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The cell potential of an electrochemical cell with the cell reaction 2al(s) + 3zn2+(aq) → 3zn(s) + 2al3+(aq) is 1. 607 v. What is the maximum electrical work obtainable from this cell when 0. 50 g of al is consumed?
The cell potential of an electrochemical cell with the cell reaction is 1. 607 v. the maximum electrical work obtainable from this cell when 0. 50 g of al is consumed is - 9.3 × 10⁵ J.
The reaction is given as :
2Al + 3Zn²⁺ ----> 3Zn + 2Al³⁺
the maximum electrical work obtainable from this cell:
ΔG = - n FE°cell
where,
maximum electrical work = ΔG
n = no. of transfer electron = 2 × 3 = 6 e⁻
E°cell = 1.607 V
ΔG = - n FE°cell
ΔG = - 6 × 9.65 × 10⁴ × 1.607
ΔG = - 9.3 × 10⁵ J
Thus the maximum electrical work obtain from this cell is - 9.3 × 10⁵ J.
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Which of these describes a way in which humans could increase biodiversity in a marine ecosystem?
A. Fish populations increase as dissolved oxygen decreases.
B. Data that shows how trees get affected by disease as levels of acid rain increases.
C. Data showing how forests grow when acidic precipitation decreases.
The statement that describes a way in which humans could increase biodiversity in a marine ecosystem is as follows: Fish populations increase as dissolved oxygen decreases (option A).
What is biodiversity?Biodiversity is the diversity (number and variety of species) of plant and animal life within a region.
It can be used more specifically to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans.
Marine ecosystem are aquatic environments with high levels of dissolved salt. These include the open ocean, the deep-sea ocean, and coastal marine ecosystems, each of which has different physical and biological characteristics.
The biodiversity of a marine ecosystem can be illustrated by the increase in fish populations in the marine environment, hence, option A is correct.
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difference between kinetic and potential energy
Answer:
Kinetic energy has its determining factors and those are mass and speed or velocity
whereas the determining factors of potential energy are height, distance and mass.
EXAMPLE OF K.E
kinetic energy could be flowing water...
EXAMPLE OF P.E
potential energy is the water that is present at the top of the hill.
Balance the equation:
SO₂ +
Li₂Se →
SS₂ +
Li₂O
Answer:
Explanation:
english please
the explosive tnt has a heat of combustion of 3406 kj/mol. is this higher or lower than sugar?
TNT has a heat of combustion of -3406 kJ/mol compared to sugar's -5639 kJ/mol. TNT will blow up more quickly since it burns at a lower temperature. The heat-up time for sugar will be substantially longer.
What does explosion look like in TNT?A common way to convey energy is to use the term "TNT equivalent," which is often used to refer to the energy generated in an explosion. According to this convention, a ton of TNT is equal to 4.184 gigajoules, or around the amount of energy produced when a metric ton (1,000 kilograms) of TNT detonates.
How many gigajoules are there?The unit of measurement for energy consumption is the gigajoule (abbreviated as GJ), which is equal to one billion joules. At typical conditions, a gigajoule of natural gas is around 25.5 cubic meters. Approximately 27 liters of fuel oil, 39 liters of propane, 26 liters of gasoline, or 277 kilowatt hours of electricity are equivalent to one gigajoule of natural gas.
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In double replacement reactions, why will two metals not combine with each other when products are formed?.
To solve such this we must know the concept of double displacement reaction. Therefore, in double replacement reactions two metals can not combine with each other when products are formed because cation and anion have to combine to form product.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
In double displacement reaction the two compounds react with each other. The cations of each compound exchange their places with ne another. Cations that are metals can not combine to form compound. Cation and anion combine to form a compound.
Therefore, in double replacement reactions two metals can not combine with each other when products are formed because cation and anion have to combine to form product.
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which type of building material can produce toxic gases and rapidly deteriorate under fire conditions?
Engineered wood products type of building material can be highly combustible and produce toxic gases when exposed to fire.
Its construction materials exhibit a variety of flaws and stone degradation patterns, including color fading, spalling, and flaking.
Materials comprised of wood fibers connected by glue or binders may be extremely flammable, release hazardous fumes, or degrade quickly when exposed to fire. Building firewalls involves using walls.
In North America, wood is the most widely used building material and the foundation of many different structural systems. Wood's response to fire conditions is influenced by its size and moisture content.
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explain how a specific amino acid is joined to its appropriate trna; describe the energy source that drives this endergonic process.
Each aminoacyl-tRNA synthetase's active site fits a certain amino acid and its associated tRNA like a "lock and key." The amino acid is subsequently joined to the tRNA using ATP.
What is endergonic process?
A reaction in which energy is absorbed is referred to as an endergonic reaction. In terms of chemistry, this indicates that the net change in free energy is positive, meaning that the system has more energy at the conclusion of the reaction than it did at the start.Endergonic reactions require a gain in energy, therefore for the reaction to take place, the energy needs to come from somewhere else.Because most endergonic reactions use ATP, DNA and RNA production is interesting because it does not. As you may remember, the four bases of DNA are A, T, C, and G. Adenosine is represented by the "A" base pair, same like it is in ATP.ATP is one of the components used in DNA synthesis, as opposed to being used and then replenished. Trisphosphates of the base pairs ATP, TTP, CTP, and GTP are the first compounds used in the procedure.One of the nucleotide's phosphate groups separates when DNA polymerase positions one of these nucleotide triphosphates to attach to the expanding DNA strand; this is replaced by the establishment of a new bond between the nucleotide and the DNA strand.Hence lock and key model is used
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Task#1
After you’ve chosen a topic, you will research it. Make sure to be choosing reputable sources. These are the questions below that you need to complete. The main questions you’ll seek to answer are:
List all resources that were used: You will need to list at least 3 resources
What is your disturbance?
How is it caused?
Where in the world is this disturbance most commonly seen?
How does it impact biodiversity? What are other consequences?
What feedback mechanisms can be associated with your chosen disturbance? For this portion, you will have to research some indirect impacts that result from this disturbance.
What data sources can you find? For example, here is a graph about deforestation in Brazil, and the connection between the desire for agricultural land to grow soybeans, particularly when the price for soybeans is profitable..
Answer:1
Explanation:
1x1=1 1
Please do a half page report on Mauna Loa Volcano ‼️‼️
Explanation:
MAUNA LOA (VNUM #332020)
19°28'30" N 155°36'29" W, Summit Elevation 13681 ft (4170 m)
Current Volcano Alert Level: WARNING
Current Aviation Color Code: ORANGE
The Northeast Rift Zone eruption of Mauna Loa continues. One active fissure, fissure 3, is feeding a lava flow downslope.
Fissure 3 is generating a lava flow traveling to the north toward the Daniel K. Inouye Highway (Saddle Road) that has reached relatively flatter ground and slowed down significantly over the past several days, as expected.
As of 12 p.m. today, December 4, the flow front was about 2.25 mi (3.6 km) from the Daniel K. Inouye Highway (Saddle Road). Where the fissure 3 lava channel is branching, on the steeper slopes of the Northeast flank about half way down the lava flow, there were several small overflows recorded over the past day. During the past 24 hours, the lava flow advanced at an average rate of about 40 feet per hour (12 meters per hour). Though the advance rate has slowed over the past several days, the lava flow remains active with a continuous supply from the fissure 3 vent.
Advance rates may be highly variable over the coming days and weeks. On the flat ground between Mauna Loa and Mauna Kea, lava flows advance more slowly, spread out, and inflate. Individual lobes may advance quickly, and then stall. Additional breakouts may occur if lava channels get blocked upslope. There are many variables at play and both the direction and timing of flow advances are expected to change over periods of hours to days, making it difficult to estimate when or if the flow will impact Daniel K. Inouye Highway.
Sulfur dioxide (SO2) emission rates of approximately 180,000 tonnes per day (t/d) were measured on December 1, 2022 and remain elevated at this time. Volcanic gas is rising high and vertically into the atmosphere before being blown to the west at high altitude, generating vog (volcanic air pollution) in areas downwind. The International Volcanic Health Hazard Network has detailed information about
A given sample of n2 gas has a pressure of 0. 30 atm at 30. 0 °c. If the volume is 2. 0 l, how many moles of n2 are present?.
The number of mols of N2 present 0.3 atm pressure and 30 °C is 0.0781 mol
What are mole?
The term "mole" (also spelled "mole") refers to a standard scientific unit for measuring large quantities of extremely small objects like atoms, molecules, or other specific particles. The mole represents 6.02214076 x 10^23 units, an astronomically large number.
At STP, which is denoted as 0°C (273.15 K, 32°F), the molar volume of a gas is 22.414 L/mol. By calculating the moles of nitrogen in 1.75 L at STP using dimensional analysis we get
1.75 L N2 divided by 1 mole per 22.414 L equals 0.0781 mol.
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complete and balance 2HNO3+NaCo3?
Answer:
Na2CO3 + 2HNO3 → CO2 + H2O + 2NaNO3
Explanation:
Which object has a mass of 27 grams. If each object has an identical *
volume of 3cm', which object has a mass of 27 grams
9 g/cm³ object has a mass of 27 grams.
Define mass?A substance or object's mass is a measurement of how much matter there is in it. Smaller masses can be measured in grams instead of kilograms (kg), which is the standard SI unit for mass (g).The kilogram is the kilogram, the standard international unit of mass (kg). Science and technology define a body's weight as the force that causes it to accelerate at a rate equal to the local acceleration of free fall in a given reference frame.The quantity of substance present in any item or body serves as the best definition of mass. We see mass in everything around us. For instance, objects like a table, chair, bed, football, glass, and even air have mass. Having said that, all things are light or heavy because of their mass.To learn more about mass refer to:
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Calculate the kinetic energy of the cart at the point shown below. It has a mass of 225 kg, is 10 m high, and is moving at a velocity of 2 m/s.
Average kinetic energy is the average sum of all kinetic energy of all the molecules of gases. Therefore, the kinetic energy of the cart is 450J. Average kinetic energy is directly proportional to temperature.
What is kinetic energy?
It is a energy which is possess by a moving object. It is very difficult to find the correct value of kinetic energy so we find average kinetic energy. Which is very easy to calculate as compared to calculating kinetic energy. It is not dependent on the type of gases or mass of gases.
Mathematically,
K.E=1/2mv²
Where,
m= mass of object= 225 kg
v= velocity of object= 2 m/s
substituting all the given values in the above equation, we get
K.E=1/2×225 ×2²
K.E=450J
Therefore, the kinetic energy of the cart is 450J.
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.Which of the following elements would increase in size when it became an ion?
A Indium
B Lead
C Mercury
D Selenium
Answer: Selenium
Explanation: Selenium is a non metal
A 0. 0733 L balloon contains 0. 00230 mol of L, vapor at a pressure of 0. 924 atm.
What is the temperature, in Kelvin, of the I in the balloon?
Express the answer using 3 significant figures.
A 0.0733L balloon contains 0.00230 mol at a pressure of 0.924 atm.
V=0.0733 L
n=0.00230
P=0.924 atm
From the ideal gas law:
T=PV/nR
T= 359.12K
What is the ideal gas law?
The right fuel law, additionally known as the general gasoline equation, is an equation of the state of a hypothetical perfect gasoline. Despite the fact that the best gasoline law has numerous barriers, it is a superb approximation of the behavior of many gases underneath many situations. Benoit Paul Émile Clapeyron stated an appropriate gasoline regulation in 1834 as a combination of the empirical Charles’s regulation, Boyle’s regulation, Avogadro’s regulation, and gay-Lussac’s regulation.The perfect gas law states that the made of the strain and the volume of 1 gram molecule of a really perfect gasoline is the same to the fabricated from the absolute temperature of the gas and the prevalent gasoline consistent.To know more about the ideal gas law, click the link given below:
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Study the pattern of digits shown here. Each digit represents a square that is blank or filled in. 000010000 Which picture could be encoded by this pattern? Responses 9 squares in 3 rows and 3 columns, with only the center square filled in. 9 squares in 3 rows and 3 columns, with only the center square filled in. 9 squares in 3 rows and 3 columns, with alternating squares filled in and blank. 9 squares in 3 rows and 3 columns, with alternating squares filled in and blank. 9 squares in a column, with the top and bottom squares filled in. 9 squares in a column, with the top and bottom squares filled in. 9 squares in a row, with all squares filled in
The picture that can be encoded by the pattern 000010000 is
9 squares in 3 rows and 3 columns, with only the center square filled in.
What is a pattern in math?A pattern in mathematics is a series of recurring figures, shapes, or numbers. Any kind of event or thing can be connected to a pattern.
A pattern has a rule that identifies the items that are part of the pattern and those that are not.
How to encode the patternThe pattern representing blank and filled can be encoded as follows
let 0 represents blank and 1 represent fill
The pattern 000010000 can be rewritten as
0 0 0
0 1 0
0 0 0
The represents 3 rows and 3 columns where all are blanks except the center is filled in
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what mass of sodium phosphate is required to prepare 250.0 ml of a solution that is 0.30 m in sodium ion?
4.1g of sodium phosphate is required to prepare 250.0 ml of a solution that is 0.30 m in sodium ion.
The important thing to note here is that each mole of trisodium phosphate ([tex]Na_{3}PO_{4}[/tex]) gives us 3 moles of Na ions. So a solution that is 0.30 M in sodium ion is only 0.10 M in [tex]Na_{3}PO_{4}[/tex].
Now, molarity is moles/L, so we can figure out the total number of moles we need:
0.10 mol/L × 0.250 L = 0.025 moles [tex]Na_{3}PO_{4}[/tex].
Finally, the MW of [tex]Na_{3}PO_{4}[/tex] = 164 g/mol.
So: 0.025 moles × 164 g/mol = 4.1 g
So you would need 4.1 g of trisodium phosphate to make 250 mL of this solution.
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What tends to happen to a sound wave as air temperature increases? O A. The wave's speed increases. B. The wave vibrates more slowly. C. The wave stands still. D. The wave's speed decreases.