What must remain constant if Charles' law is to be applied to a
given sample of a gas?
a Pressure
b Volume
C Temperature
d None of the above

Paper used as a writing material is made of pulp (wood).

Paper is a sheet material used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.

Paper is made from cellulose found in trees, which are the main source of cellulose fibre (or woodpulp). Besides woodpulp, paper can be made from other materials such as cotton, flax, esparto, straw, hemp, manilla and jute.

Wood pulp is usually a softwood, used for pulping to make paper.

Learn more about pulp at: https://brainly.com/question/23590026

#SPJ1

Answer: Lava lamps, Earth's mantle, and the Earth's atmosphere.

Explanation: Convection occurs when denser elements sink while less dense elements rise due to difference in density caused by heat.

The wax in lava lamps rises when heated up since their density decreases. The same is for the Earth's mantle, where hotter materials rise, while the cooler ones sink.

The steps of how plants get energy in the correct order is as follows:

Photosynthesis is the process by which plants and other photoautotrophs convert light energy into chemical energy.

Photosynthesis is carried out by the cells of green plants to synthesize their food in form of sugar powered by the energy from sunlight.

The cells in the leaf use the energy from the sun (light energy) and produce sugars (chemical energy). After which, the sugars are broken down to release energy for use by the cells in a process called cellular respiration.

Learn more about photosynthesis at: https://brainly.com/question/29764662

#SPJ1

9.162 moles of methane gas will combust to produce 330 grams of water.

The balanced chemical equation for the combustion of methane (CH₄) in the presence of oxygen (O₂) to produce water (H₂O) and carbon dioxide (CO₂) is:

CH₄ + 2O₂ -> CO₂ + 2H₂O

From the equation, we can see that one mole of methane produces two moles of water.

The molar mass of water (H₂O) is approximately 18.015 g/mol. Therefore, 330 g of water is equivalent to 330/18.015 ≈ 18.324 moles of water.

Since one mole of methane produces two moles of water, the number of moles of methane required to produce 18.324 moles of water is half that value, or 9.162 moles.

Therefore, the answer is:

9.162 moles of CH₄ (to 4 significant figures)

Learn more about moles here:

https://brainly.com/question/26416088

#SPJ9

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

Answer:

0.45688mL

Explanation:

1) First you should look on the coefficients.
\(2C_8H_{18(l)}\ + 25O_2_{(g)}=\ 16CO_{2(g)}+ 18H_2O_{(g)}\)

2) Do the ratio between C8H18 and O2:

\(C_8H_{18}\ \ \ \ \ \ \ \ \ O_2\\2 : \ \ \ \ \ \ \ \ \ \ \ \ \ 25\\X: \ \ \ \ \ \ \ \ \ \ \ 0.0500moles\\2X0.0500/25= 0.004\\X=0.004 \moles\ of\ C_8H_{18}\)

3) grams= moles X molecular mass

\(0.004*114.22= 0.45688g\)

[1g=1mL] => 0.45688mL

Answer:

365 mL

Explanation:

There are 1,000 mL per every 1 L. As such, to convert between the two measurements, you need to multiply the given volume (0.365 L) by the conversion. To allow for the cancellation of units (liters), liters should be in the denominator of the conversion.

1,000 mL = 1 L

 0.365 L            1,000 mL
----------------  x  -----------------  = 365 mL
                               1 L

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

Know more about  hydroxide ions   here:

https://brainly.com/question/28464162

#SPJ8

Taking into account the definition of wavelength, frecuency and propagation speed, the wavelength of a yellow light with a frequency of 5.2×10¹⁴ Hz is 5.77×10⁻⁷ m.

The length of a wave is the spatial period of the wave, that is, the distance at which the waveform repeats itself. Two consecutive points that have the same phase are normally considered: two maximums, two minimums, two zero crossings (in the same direction).

This is, wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

Frequency is a measure of the number (amount of cycles) of waves generated in a unit of time. Its unit is s⁻¹ or hertz (Hz).

The propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement.

The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:

v = f×λ

All electromagnetic waves propagate in a vacuum at a constant speed of 3×10⁸ m/s, the speed of light.

In this case, you know:

Replacing in the definition of propagation speed:

3×10⁸ m/s= 5.2×10¹⁴ Hz× λ

Solving:

λ= 3×10⁸ m/s ÷ 5.2×10¹⁴ Hz

λ= 5.77×10⁻⁷ m

In summary, the wavelength of the yellow light is 5.77×10⁻⁷ m.

Learn more about wavelength, frecuency and propagation speed:

brainly.com/question/2232652

#SPJ1

The new molar concentration (M) of the diluted solution when added 2.5L of water to 0.5 L of 8.50 M solution is 1.42M.

Molar concentration of the solution will be calculated by using the below equation:
M₁V₁ = M₂V₂, where

M₁ = initial concentration of solution = 8.50 M

V₁ = initial volume = 0.5 L

M₂ = final concentration of diluted solution = ?

V₂ = final volume of diluted solution = 0.5 + 2.5 = 3 L

On putting values, we get

M₂ = (8.50)(0.5) / (3) = 1.416 = 1.42 M

Hence required molar concentration of dilute solution is 1.42M.

To know more about molarity, visit the below link:

https://brainly.com/question/24305514

#SPJ1

Answer:

1. Percentage yield is 64.75%

2. Atom economy is 48.39%

Explanation:

1. Determination of the percentage yield

Experimental yield = 24.8 g

Theoretical yield = 38.3 g

Percentage yield =?

Percentage yield = Experimental yield /Theoretical yield × 100

Percentage yield = 24.8 / 38.3 × Percentage yield = 2480 / 38.3

Percentage yield = 64.75%

2. Determination of the atom economy.

The balanced equation for the reaction is given below:

6CO₂ + 6H₂O —> C₆H₁₂O₆ + 6O₂

Next, we shall determine the mass of CO₂, H₂O and C₆H₁₂O₆ from the balanced equation.

Molar mass of CO₂ = 12 + (16×2)

= 12 + 32

= 44 g/mol

Mass of CO₂ from the balanced equation = 6 × 44 = 264 g

Molar mass of H₂O = (2×1) + 16

= 2 + 16

= 18 g/mol

Mass of H₂O from balanced equation = 6 × 18 = 108 g

Molar mass of C₆H₁₂O₆ = (6×12) + (12×1) + (6×16)

= 72 + 12 + 96

= 180 g/mol

Mass of C₆H₁₂O₆ from the balanced equation = 1 × 180 = 180 g

Next, we shall determine the total mass of the reactants. This is illustrated below:

Mass of CO₂ = 264 g

Mass of H₂O = 108 g

Total mass of reactants =?

Total mass of reactant = Mass of CO₂ + Mass of H₂O

Total mass of reactant = 264 + 108

Total mass of reactant = 372 g

Finally, we shall determine the atom economy. This can be obtained as follow:

Mass of desire atom (C₆H₁₂O₆) = 180 g

Total mass of reactants = 372 g

Atom economy =.?

Atom economy = mass of desire atom / total mass of reactant × 100

Atom economy = 180/372 × 100

Atom economy = 48.39%

The atmospheric conditions at a particular time.

i did the test.

Answer:

the atmospheric conditions at a particulur time

Explanation:

Answer:

Inference  — The candle stayed lit longer because the plant gave off oxygen.

Observation — The candle went out when it was placed in a closed jar.

Observation — The candle stayed lit longer in closed jar when a plant was present.

Explanation:

Tap the THANKS button and RATE ⭐️

(If helpful)

Joseph Priestley discovered the element oxygen which is most precious for living. He discovered the need of oxygen to respire and release by plants during photosynthesis.

Photosynthesis is the process of synthesis of glucose using carbon dioxide and water with the aid of light energy. The process makes energy for all the living organism in earth.

Plants uptake carbon dioxide and release oxygen during photosynthesis which makes oxygen abundant in the atmosphere.Thus, presence of plants give us air and remove carbon dioxide formed by respiration.

Priestley's conducted an experiment with a mouse placed in a closed jar and candle light inside. When the jar is close, there will be no air inside make the rat perish and candle light off. When he placed a plant inside the jar it released oxygen which made the rat alive a little longer.

Candle light stayed a lit longer by the presence of the plant. Thus option A is correct. Priestley concluded that buring needs oxygen.

To find more about oxygen, refer the link below:

https://brainly.com/question/2272415

#SPJ2

Electrons first occupy the position in lowest possible energy.

orbital diagrams:-

The higher the energy level, the Third energy the electrons in that level have. On the orbital diagram, fill in the boxes to label the representations of an orbital and a sublevel.   2   electrons can occupy a single orbital, and these electrons have Opposite spin. Within a sublevel, all the orbitals fill with one electron, each of which has the Positive spin before a second electron fills any of the orbitals.

what is Orbital?

Each energy position is made up of areas known as an orbital. An orbital is an area of probability in which electrons can be set up. Each energy position, except for the first, has further than one orbital. Each orbital has a specific shape.

To know more about Energy levels here:

brainly.com/question/29736874

#SPJ1

Answer:

4.08g

Explanation:

17.3=(5.09+8.13+S)

Answer:

Explanation:

The density of a substance can be found by using the formula

\(Density = \frac{mass}{volume} \)

Making volume the subject we have

From the question

Density = 728 g/mL

mass of nickel = 5.040 g

Substitute the values into the above formula and solve for the volume

That's

\(volume = \frac{5.040}{728} \\ = 0.692307\)

We have the final answer as

Hope this helps you

Answer:

The answer would be 0.6923 mL :)

Answer: The volume of 6.8g of Kr gas at STP is 0.00033064 L.

Explanation:

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

for more such questions on symptom

https://brainly.com/question/21078887

#SPJ8

In Newton's second law, unbalanced or net forces cause an object to accelerate.

Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed as F = m × a

Where:

F is the net force acting on the object,

m is the mass of the object,

a is the acceleration produced in the object.

This law describes the relationship between force, mass, and acceleration. The greater the force applied to an object, the greater its acceleration. The greater its mass, the smaller its acceleration for the same force.

Learn more about Newton's second law, here:

https://brainly.com/question/27712854

#SPJ1

Answer:

A. Argon

Explanation:

it is a gas that makes up to 1% of the atmosphere

The concentration of the new potassium permanganate, KMnO solution is 0.06 M.

To find the concentration of the new solution, we can use the formula,

C₁V₁ = C₂V₂,

C₁ = 0.75,

V₁ = 20.0 mL,

V₂ = 250.0mL

C₂ is what we have to find. Plugging in the values we know, we get,

0.75 M x 20.0 mL = C₂ x 250.00 mL

Solving for C₂, we get the final concentration of the potassium permanganate.

C₂ = (0.75 M x 20.0 mL) / 250.00 mL

C₂ = 0.06 M

Therefore, the concentration of the solution has changed to 0.06 M from 0.75M.

To know more about concentration, visit,

https://brainly.com/question/17206790

#SPJ1

The quantity of the top product is approximately 1483.4 kg/h, and the quantity of the bottom product is approximately 1116.7 kg/h.

We solve using the concept of material balances.

Given:

F = Feed rate of the solution (benzene + toluene) = 1500 kg/h

Fb = Feed rate of benzene in the feed = 0.75 * F = 1125 kg/h

Ft = Feed rate of toluene in the feed = F - Fb = 375 kg/h

Benzene Balance:

Fb = Bt + Bb

where Bt is the flow rate of benzene in the top product and Bb is the flow rate of benzene in the bottom product.

1125 kg/h = Bt + Bb

Toluene Balance:

The mass balance equation for toluene can be written as:

Ft = Tt + Tb

where Tt is the flow rate of toluene in the top product and Tb is the flow rate of toluene in the bottom product.

375 kg/h = Tt + Tb

The reflux ratio is given as 2.5 kg reflux per kg of product

The total product flow rate (Pt) will be:

Pt = Bt + Tt = Bb + Tb

Therefore, the reflux flow rate (R) is:

R = 2.5 * Pt

Solving the equations, we find:

Bt = 1116.7 kg/h

Tb = 8.3 kg/h

Top Product Flow Rate = Bt + Tt = Bt + (Ft - Tb) = Bt + (375 - 8.3) = 1116.7 + 366.7 = 1483.4 kg/h

Bottom Product Flow Rate = Bb + Tb = 1125 - 8.3 = 1116.7 kg/h

Learn more about material balance at: https://brainly.com/question/30705511

#SPJ1

The species produced at the cathode in this electrolysis reaction is Ag(s). During electrolysis, the cathode is the electrode at which reduction occurs.

The standard reduction potential is a measure of the tendency of a species to gain electrons and be reduced. A species with a more negative reduction potential is more likely to be reduced than a species with a less negative reduction potential.

Given the species in the mixture, the only species that can be produced at the cathode is silver (Ag). This is because silver has the most negative reduction potential of all the species in the mixture. Copper (Cu), magnesium (Mg), and nickel (Ni) all have more positive reduction potentials and will not be reduced at the cathode.

Learn more about electrolysis, here https://brainly.com/question/12054569

#SPJ4

Answer:

T-cells are made to identify antigens, while inflammation fights anything in the affected area.

Explanation:

virus antigen on an infected cell fits into the Killer T-cell receptor

T-cell releases perforin and cytotoxins.

Perforin first makes a hole infected cell membrane

Cytotoxins go inside the cell through this hole, destroying it and any viruses inside

https://brainly.com/question/9370136

askabiologistasuedu

Answer:

Replacement is your answer

Answer:

A

Explanation:

If Hydrogen is H₂  There will be two silver

and is Carbon is C There will only be one gray

and if Oxygen is O₃ There will be three red

Answer:

because it absorbs all colours expect for red,

Explanation: making the red light bounce into your eyes, therefore seeing the colour red

Question 2: The wave transfers its energy to the mineral, I think, thats my best guess

Answer:be careful and relax

Explanation:

Answer:

Hahaha be careful and relax

Answer:

\(f=2x10^8Hz\)

Explanation:

Hello!

In this case, given that frequency of the electromagnetic radiation showing off a wavelength of 1.25 m is computed by using the speed of light as shown below:

\(f=\frac{c}{\lambda }\)

We plug in the wavelength and speed of light to obtain:

\(f=\frac{3x10^8m/s}{1.25m } \\\\f=2x10^8Hz\)

Best regards!

The frequency will be "\(2\times 10^8 \ Hz\)".

Radiation which thus travels throughout waves as well as which has both electromagnetic energy.

The power of electromagnetic radiation could range from minimum to maximum. Radio waves, radiation, x-rays, and gamma radiation are all examples of electromagnetic radiation.

Given value:

Wavelength, \(\lambda = 1.25 \ m\)

Speed of light, \(c = 3\times 10^8\) m/s

The frequency be:

→ \(f = \frac{c}{v}\)

By putting the values,

     \(= \frac{3\times 10^8}{1.25}\)

     \(= 2\times 10^8\) Hz

Thus the above response is right.

Find out more information about wavelength here:

https://brainly.com/question/10728818