A sample of helium gas is heated from 20.0°C to 40.0°C. This
heating process causes the gas to expand to a volume of 585
mL. What was the original volume of the helium gas?
a 292mL
b 370mL
C 548mL
d 625mL

Answer:

large intestine

Explanation:

The large intestine's job is to dehydrate what's left of the food and form it into stool. It accomplishes this by gradually absorbing electrolytes and water while its muscular system transfers the waste. While this is happening, bacteria in your large intestine feed on the waste and further decompose it, completing the chemical phase of digestion.

Answer: D. It is a process where the combined rapid mix-slow mix process with the use of a chemical that in combination of the mixing process creates floc.

Explanation:

Coagulation is a process used in water treatment to remove suspended particles from water. It involves the use of chemicals (typically aluminum sulfate or ferric chloride) that are added to the water to destabilize the suspended particles and create larger, heavier particles called floc. The floc can then be removed from the water by sedimentation or filtration. The process typically involves a rapid mix phase, followed by a slow mix phase, where the chemical is added and the floc is formed.

Q={x:x\(\epsilon\)n,7<n<31}

\(\\ \sf\longmapsto Q=\left\{8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30\right\}\)

You can write it like this too

\(\\ \sf\longmapsto Q=\left\{8,9......30,31\right\}\)

The electric current is  0.025 A

Electric current refers back to the go with the flow of energy in an electronic circuit and to the amount of strength flowing through a circuit. it's far measured in amperes (A). the bigger the cost in amperes, the more energy is flowing within the circuit.

Ag+ + e¯ →Ag

1F deposits 107.87 g/mol (molecular mass) of silver

1F = 96500 C

Let, 107.87 g/mol needed = 96500 C

Number of coulombs required to deposit 0.3650 g of silver =(96500/107.87) 0.3650  

Q = 326.5 C

According to Faraday’s law, Q = I x t

I = 326.5 C / (216 x 60 s) = 0.025 A

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Explanation:

An error during DNA replication would create a gene mutation.

During DNA replication, the genetic information in a cell is copied to make new DNA molecules. However, mistakes can occur during this process, leading to changes in the DNA sequence, which can result in a mutation. Mutations can also be caused by exposure to environmental factors, such as radiation or chemicals, which can damage the DNA molecule directly or affect the cellular processes involved in DNA replication.

Mutations can have a variety of effects on the organism, ranging from no effect to causing serious health problems or even death. Gene mutations can also be inherited from a parent, which can result in genetic disorders or predisposition to certain diseases. Therefore, it is important to understand the mechanisms of gene mutations and their potential impacts on organisms.

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Answer: False

Explanation:

Except for a few substances like carbonates, carbides, cyanides, and cyanates, every molecule that includes carbon and hydrogen is considered to be organic. A molecule need not include nitrogen to be regarded as organic.

Amino acids, proteins, and nucleic acids are examples of organic molecules that include both carbon and nitrogen. However, not all organic substances contain nitrogen. The most prevalent organic substances are hydrocarbons and their derivatives, which are made up entirely of hydrogen and carbon.

It is essential to remember that the term "organic" is used in various settings and denotes various things depending on the industry.

While "organic" refers to items produced without the use of synthetic pesticides, fertilizers, or other chemicals in agriculture and food science, the term "organic" is used to designate substances that include carbon and hydrogen in chemistry.

There are 8.73 × 10²⁴ formula units in 14.5 moles of sulfuric acid.

Formula units is an empirical formula of an ionic compound (that does not possess individual molecules) for use in stoichiometric calculations.

The formula unit can be calculated by multiplying the number of moles in a substance by Avogadro's number (6.02 × 10²³).

According to this question, there are 14.5 moles in sulfuric acid. The formula unit can be calculated as follows:

Formula units of sulfuric acid = 14.5 × 6.02 × 10²³

Formula units = 8.73 × 10²⁴ formula units

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Answer:

Static Friction

Explanation:

Answer:

The answer is Static Friction

Explanation:

The number of  atoms that are in 1.50 mol of carbon-12 is 18g.

1 mol of any substance contains 6.022×1023 atoms/molecules

So 1.50 moles of carbon  will have 1.50×6.022×1023 atom = 9.0×1023 atoms

Now,  number of moles = weight g /molar mass gmol-1

1.5= weight g/ 12 gmol-1.

So weight = 1.5 mol×12gmol-1 = 18 g

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Answer:

C. Anaphase: Chromosomes are pulled apart

Explanation:

Answer:

anaphase sorry i am late

Explanation:

Constant volume process is a thermodynamic process which is also known as isochoric process. an example when heat is added to a gas in a container with fixes walls.

The temperature and pressure of a gas will rise when it is heated using a constant volume process, often known as an isochoric process. The gas doesn't perform any external labor because its volume doesn't change. The body of the gas stores all the heat that was delivered as internal energy. It should be emphasized that Gay-Lussac statute controls this procedure. Therefore, there is no work done in a constant volume process. The heating or cooling of the contents of a closed, inelastic container is an example of an isochoric process: The thermodynamic process is the addition or removal of heat; the closed system is established by the isolation of the container's contents; and the constant-volume requirement is imposed by the container's impossibility of deforming. Here, the isochoric process ought to be nearly static.

In a constant-volume process, 209 J of energy is transferred by heat to 1.00 mol of an ideal monatomic gas initially at 300 K. Find (a) the work done on the gas,(b) the increase in internal energy of the gas, and(c) its final temperature.

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Subatomic particles include "Electrons", and those include the "heavier" building blocks of the nucleus of an atom, the electrically neutral neutrons and positively charged protons

Answer:

In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Explanation:

That is what I think on the subject

A law is more specific, such as this particular description of matter, whereas a theory can be more general and often includes more of a why. Atomic Theory explains why the law of conservation of matter exists; in chemical reactions, atoms simply rearrange and have the same mass before and after.

A theory is a well-thought-out elaboration for natural-world anecdotes that has been built using the methodological approach and incorporates many facts and hypotheses.

A scientific law, in overall, is a description of an observed phenomenon. It does not explain why or what causes the phenomenon.

A scientific theory is an explanation for a concept. It is a common misconception that with enough research, theories can become laws.

A law is more precise, such as this detailed definition of matter, whereas a theory is more general and frequently includes more of a why.

Atomic Theory explains why the law of conservation of matter exists; atoms simply rearrange and have the same mass before and after chemical reactions.

Thus, that's why, the law of conservation of mass law and not a theory.

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Answer:

ydgxkjth .

jhjk

Explanation:

kugoidv jugmlirsxnl no me han dicho que no es la que no se me han dicho

Answer:

c

Explanation:

c rin sagot ko Tama

hahhahaahhahaha

The theoretical yield of the reaction between 6.20 g of carbon with excess oxygen is 22.7 g. The actual yield is given 8.35 g. Thus, the percent  yield is 36.7 %.

Percent yield of a reaction is the ratio of its actual yield to the theoretical yield multiplied by 100. The theoretical yield is calculated from the balanced chemical equation of the reaction.

One mole or 12 g of C gives one mole of carbon dioxide. Molar mass of CO₂ is 44 g/mol. Thus, the mass of carbon dioxide that can be produced from 6.20 g of C is :

= (6.20 × 44 ) / 12 g = 22.73 g.

The actual yield of CO₂ is 8.35g only. Thus, its percent yield is calculated as :

percent yield = 8.35 g/ 22.73 g × 100 = 36.7 %.

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Answer:

латсвоаоаалалплашавювабадад

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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At the usual working conditions of 101.5 kPa and 21°C, the chemical oxygen generator system would generate roughly 220.84 litres of oxygen using 500 g of LiClO4.

We may use the ideal gas law and stoichiometry to calculate how many litres of oxygen are created by the chemical oxygen generator system employing 500 g of LiClO4.

We must first determine the moles of LiClO4. LiClO4 has a molar mass of approximately 106.39 g/mol. As a result, 4.704 mol of LiClO4 are produced from 500 g of LiClO4 using the formula: 500 g / 106.39 g/mol

We can see from the chemical equation that 1 mole of LiClO4 results in 2 moles of O2. 4.704 mol of LiClO4 will therefore result in:

2 mol O2 / 1 mol LiClO4 4.704 mol LiClO4 = 9.408 mol O2

The moles of O2 under the specified conditions must then be converted to volume. The ideal gas law, which goes as follows:

PV = nRT

Where:

P = pressure = 101.5 kPa

V = volume (in liters)

n = moles of gas = 9.408 mol

R = ideal gas constant = 8.314 J/(mol·K)

T = temperature = 21°C = 294 K (converted to Kelvin)

Rearranging the equation to solve for V:

V = (nRT) / P

V = (9.408 mol × 8.314 J/(mol·K) × 294 K) / (101.5 kPa × 1000 Pa/kPa)

Simplifying the units:

V = (9.408 × 8.314 × 294) / 101.5

V ≈ 220.84 liters

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Answer:

Explanation:

The actual boiling point is probably between 34C and 40C.

Temperature measures the average kinetic energy of particles of the substances. Therefore, the correct option is option D that is the actual boiling point is probably between 34°C and 40°C.

Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.

Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source.

We can convert these units of temperature into one another. The relationship between degree Celsius and Fahrenheit can be expressed as:

°C={5(°F-32)}÷9

The actual boiling point is probably between 34°C and 40°C.

Therefore, the correct option is option D.

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Answer:

623 kgm^-3

Explanation:

Density = Mass/Volume

Mass = 1209 kg

Volume = 1.94 m^3

Density = 1209 / 1.94 kgm^-3

             = 623.1958763 kgm^-3

             = 623 kgm^-3 (3sf)

Answer: The situation was Alexander Fleming made an experiment showing that the fungus produced a chemical that could kill bacteria. The scientific knowledge was based off Fleming's work, scientists produced the first antibitoic drugs.

It should reanalyze the data to determine whether their results contradicted your hypothesis if the experiment's findings did not support it. So shouldn't change the experiments, observations, or both in order to get results that support the theory.

An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true.

If the facts continually contradict the hypothesis, it is obvious that the hypothesis is not a viable explanation for the phenomenon you are examining. The proposed explanation is disproved, and we now look for a fresh hypothesis to explain the experimental results.

If the results confirm the prediction, the hypothesis is supported. Results can be used to disprove the hypothesis if the prediction was not confirmed by the data. By monitoring data and creating a new hypothesis using the new facts, you might need to come up with new questions. Make a finding and a forecast.

Thus, It should reanalyze the data to determine whether their results contradicted your hypothesis if the experiment's findings did not support it.

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First, we need to write out the balanced chemical equation for the reaction: 4 KO2 + 2 CO2 → 2 K2CO3 + 3 O2

From the equation, we can see that 4 moles of KO2 react with 2 moles of CO2 to produce 3 moles of O2. Therefore, we need to convert the given masses of KO2 and CO2 into moles:

moles of KO2 = 2.61 g / molar mass of KO2 = 2.61 g / 71.10 g/mol = 0.0367 mol
moles of CO2 = 4.46 g / molar mass of CO2 = 4.46 g / 44.01 g/mol = 0.1013 mol

Next, we need to determine the limiting reagent (the reactant that will be completely consumed in the reaction) by comparing the mole ratios of KO2 and CO2 in the balanced equation. The ratio of moles of KO2 to moles of CO2 is:
0.0367 mol KO2 / 4 mol KO2 per 2 mol CO2 = 0.0184 mol CO2

Since this ratio is less than the actual number of moles of CO2 we have (0.1013 mol), CO2 is in excess and KO2 is the limiting reagent.

Using the mole ratio from the balanced equation, we can calculate the number of moles of O2 produced:

moles of O2 = 3 mol O2 per 4 mol KO2 × 0.0367 mol KO2 = 0.0275 mol O2

Finally, we can convert the moles of O2 to grams:

mass of O2 = moles of O2 × molar mass of O2 = 0.0275 mol × 32.00 g/mol = 0.88 g
Therefore, 2.61 g of KO2 and 4.46 g of CO2 would produce 0.88 g of O2.

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Enthalpy change is the heat that evolved or got absorbed in a reaction mixture. The enthalpy change for the reaction is -137 kJ.

Hess's law states that the enthalpy for the whole reaction will be equal to the summation of all changes that are independent of the steps of the reaction.

First, arrange all the reactions and balance them, first the data of equation 1 is rearranged:

NO₂ must be on the reactant side and must be multiplied by 3/2 so that 3 moles of NO are balanced.

3 NO₂ (g) → 3 NO (g) + 3/2 O₂ (g),    ΔH = + 174 kJ

Now, for equation 2: the moles of HNO₃ required is 2 so the whole equation will be divided by 2 as,

N₂ (g) + 5/2 O₂ (g) + H₂O (l) → 2HNO₃ (aq),      Δ H = -128 kJ

Now, for equation 3: N₂ and O₂ should be eliminated and reversed as,

2NO (g) → N₂(g) + O₂(g)    ΔH = -183 kJ

Now, to determine the enthalpy the rearranged equation 1, 2, and 3 are added to get the final equation:

3NO₂ (g) + H₂O (l) → 2HNO₃ (aq) + NO (g)

Δ H = 174 - 128 - 183

= -137 kJ

Therefore, -137 kJ is the enthalpy change.

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Answer: Newtons Second Law states that acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated), the greater the amount of force needed to accelerate the object (bullet in our case). Everyone inherently knows that heavier objects require more force to move the same distance as lighter objects.

Explanation:

The dry solute has a mass of 0.086 g. 0.113 g of water evaporated while heating, the concentration in G solute / mL solvent at 30.1 C is 0.88.

To find the concentration in g solute / mL solvent, we first need to find the mass of the solvent left after evaporation:

Mass of water before evaporation = 0.113 g

Mass of water after evaporation = 0.113 g - 0.086 g = 0.027 g

Since 1 g of water has a volume of 1 mL, the volume of water after evaporation is also 0.027 mL.

Next, we need to convert the temperature to Kelvin:

T = 30.1 + 273.15 = 303.25 K

We can now use the formula:

concentration = (mass of solute / mass of solvent) / (1 - (mass of water evaporated / mass of solvent))

Plugging in the values we get:

concentration = (0.086 g / (0.027 g)) / (1 - (0.113 g / (0.086 g + 0.027 g)))

concentration = 0.88 g/mL

Therefore, the answer is A. 0.88.

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Answer:

A

Explanation:

worked for me on acellus

Our cells obtain the molecules they need to function properly from various sources

One important source is our diet. When we eat food, our digestive system breaks it down into smaller molecules that can be absorbed into the bloodstream. These molecules, such as glucose, amino acids, and fatty acids, are then transported to our cells, where they are used as fuel for energy production .

Additionally, our cells can synthesize some molecules on their own. Through processes like photosynthesis in plant cells or biochemical reactions in our body, cells can produce molecules like carbohydrates, lipids, proteins, and nucleic acids.

In summary, cells acquire the molecules they require from the food we eat, as well as through their own synthesis, ensuring they have the necessary resources for proper functioning.

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Answer:

A functioning human body has molecules from food (glucose and amino acids) and molecules from air (oxygen) in its cells.

Answer:

3 moles of O2 needed

Explanation:

2 moles of Mg   to one mole O2

   so 3 moles of O2 needed

Answer:

C

Explanation:

NP