Quickly please! Which is a group of tissues that work together to carry out a common function?

cell
organ
organelle
organ system

The concept ideal gas equation is used here to determine the volume of the carbondioxide. Combustion reactions are generally highly exothermic reactions. The volume of CO₂ is

A combustion is a chemical reaction in which a fuel undergoes oxidation as a result of the reaction with an oxidizing agent which causes the release of energy in the form of heat.

15.0 °C = 288 K

The ideal gas equation is:

PV = nRT

V = nRT / P

V = 354 × 0.0821 × 288 / 0.995 = 8412.3 L

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A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.

Hope I helped :)

Answer:

\(Q=-126.1kJ\)

Explanation:

Hello,

In this case, by means of the released heat, we need to consider the cooling of water in two steps:

1. Condensation of steam at 100 °C.

2. Cooling of water from 100 °C to 37 °C.

Therefore, we need the enthalpy of condensation of water that is 40.65 2258.33 J/g and the specific heat that is 4.18 J/g°C for the same amount of cooled water to obtain:

\(Q=50.0g*[-2258.33\frac{J}{g}+4.18\frac{J}{g\°C}(37-100)\°C]\\\\Q=-126.1kJ\)

Best regards.

Answer:

X = 10

Explanation:

First, we need to calculate the moles of Na₂CO₃ in  the 0.948g. Then, the moles of water based on the difference of masses. X will be the ratio of moles of water and moles of sodium carbonate.

Moles Na₂CO₃ (Molar mass: 105.99g/mol):

0.948g * (1mol / 105.99g) = 8.944x10⁻³ moles

Moles H₂O (Molar mass: 18.02g/mol):

2.558g - 0.948g = 1.61g of water

1.61g * (1mol / 18.02g) =0.08935 moles

The ratio, X, is:

0.08935mol / 8.944x10⁻³ moles

Sinve CH3NH2 is weak base and its salt is CH3NH3Cl, mixing 125.0 mL of CH3NH2 and 120.0 mL of CH3NH3Cl so produce a buffer.

A buffer is a solution which resists changes to its pH when a small quantity of strong acid or base is added to it..

A buffer is made from a weak acid and its salt or a weak base and its salt.

From the given options, CH3NH2 is weak base and its salt is CH3NH3Cl.

Therefore, mixing 125.0 mL of CH3NH2 and 120.0 mL of CH3NH3Cl so produce a buffer.

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The Kinetic Molecular Theory is a  scientific model that states atoms in a compound are found in a constant state of motion (movement).

The Kinetic Molecular Theory is a  scientific model that states atoms in a compound are found in a constant state of motion (movement).

Thermal energy refers to the movement of particles and therefore both concepts are interrelated.

In conclusion, the Kinetic Molecular Theory is a  scientific model that states atoms in a compound are found in a constant state of motion (movement).

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Answer:

polymerization

Explanation:

any process in which relatively small molecules, called monomers, combine chemically to produce a very large chainlike or network molecule, called a polymer.

Answer:

D

Explanation:

because it's so hot that it's almost to the point of changing to another element

Answer:

To be honest with you I think it is A or D

Explanation:

bc I said so

The solubility of\(LaF_3\) in water is 3.04 x 10^-6 mol/L.

The solubility of \(LaF_3\) in water can be determined using the Ksp expression:

\(Ksp = [La^{3+}][F^-]^3\)

Where \([La^{3+}]\)and \([F^-]\) are the molar concentrations of the \(La^{3+}\) and \(F^-\) ions in the solution.

Since each \(LaF_3\) formula unit dissociates into one \(La^{3+}\) ion and three \(F^-\) ions, the molar solubility of \(LaF_3\) can be represented as x. Thus, the molar concentrations of \(La^{3+}\) and \(F^-\) ions in the solution can be written as x and 3x, respectively.

Substituting these values into the Ksp expression gives:

Ksp = x*(3x)^3 = 27x^4

Now, we can solve for x:

x = (Ksp/27)^(1/4)

= (2 x 10^-19 / 27)^(1/4)

= 3.04 x 10^-6 mol/L

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In a chemical equation, the numbers 2, 4, 1, and 3 must be balanced in the correct sequence.

2. Position the reactant to the left and the products to the right of the reaction arrow.

4. Maintain Atom Equilibrium.

1. Modify the coefficients to have the fewest whole-number coefficients possible.

3. Verify that the equation is balanced one last time.

Chemistry relies on balancing chemical equations to guarantee that the rule of conservation of mass is upheld. The reactants are written on the left side of the arrow and the products are on the right in the first step. There must be an equal amount of atoms on both sides of the equation.

Changing the coefficients in front of each molecule is accomplished. These coefficients must be as little as whole numbers are able to be. The equation must be balanced, which means that each element's number of atoms on either side of the equation must be equal. We must go back and change the coefficients until the equation is balanced.

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The question is -

List the steps required to successfully balance a chemical equation in ascending order, with the first step at the top.

1. Verify that the equation is balanced one last time.

2. Position the products on the right and the reactants on the left of the reaction arrow.

3. Maintain atom balance.

4. Modify the coefficients to have the fewest whole-number coefficients possible.

Molar mass=65g/mol

Now

\(\boxed{\sf No\:of\:moles=\dfrac{Given\:Mass}{Molar\:Mass}}\)

\(\\ \rm\longmapsto No\:of\;Moles=\dfrac{1.3}{65}=0.02mol\)

Answer:

When water freezes and turns into ice, it releases latent heat. Then, the ice that builds up on the plant will insulate it from the colder surrounding air temperatures. Because of this, some growers choose to spray their crop with water before the freeze occurs.

Explanation:

Two correct answers which describe how water mixes in a thermohaline current are A. Cold water sinks under warmer water. And D. Saltier water sinks under less salty water.

Thermohaline Current is caused by variations in the seawater's surface density from pole to equator. Variations in temperature (thermal) and salinity (haline) affect the equator-to-pole surface. On Earth's climate, the thermohaline ocean currents have a significant impact on circulating heat across the planet.

In the thermohaline current, warmer, fresher water masses are less dense and float, while colder, saltier water masses are more dense and sink. Due to its higher density, this cold, salty water sinks.

So, it is obvious that the correct answers are:

A. Cold water sinks under warmer water.

D. Saltier water sinks under less salty water.

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Answer:

Calculate the energy of a photon having a wavelength of 7.71 x 10^-5 m.​

Explanation:

Answer:

best species to use for the

cathode and anode that would yield the largest potential.

Explanation:

The best cathode will be Al ³⁺ + e --> Al and the best anode is Ce⁴⁺ + e --> Ce³⁺. The E °cell is +3.37 emf.

Cathode is defined as the electrode of a polarized electrical device where a regular current exits. A Daniell galvanic cell, for instance, can be transformed into an electrolytic cell by switching the direction of the current, in which case the copper electrode serves as both the positive terminal and the anode.

Anode is defined as an electrode of a polarized electrical device that allows regular current to flow through it. The anode is the electrode into which current travels. The anode is often the positive side.

E ᵒcell = +1.70 - ( - 1.66 )

E ᵒcell = +1.70 + 1.66

E ᵒcell = +3.37 emf

Thus, the best cathode will be Al ³⁺ + e --> Al and the best anode is Ce⁴⁺ + e --> Ce³⁺. The E °cell is +3.37 emf.

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A way to decrease the rate of dissolution of a solid in a liquid is to decrease agitation. Therefore, option B is correct.

A solute in a gaseous, liquid, or solid phase can dissolve in a solvent to create a solution through the process of dissolution.

The greatest concentration of a solute that may dissolve in a solvent at a specific temperature is known as solubility. The solution is deemed saturated when the solute concentration reaches its maximum.

Solubility and solution rate both decrease with rising temperature. The greatest quantity of a solute that can dissolve in a specific amount of solvent or solution at a specific temperature is the solute's solubility.

Thus, option B is correct.

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Answer:

A mol (approximately)represents the number 6.02 X 10^^23. Mols become useful when we learn that, for any element on the periodic table, 6.02 X 10^^23 atoms of that element have a mass equal to the atomic mass in grams. So, on the periodic table carbon has an atomic mass of 12.011. That means: 12.011 grams of carbon is made up of 6.02 X 10^^23 atoms.

The above question is tricky.

If the question considers 1 molecule of SO2 as a particle, then the answer is 1.80 * 6.02 X 10^^23

If the question considers the S as one particle, and the O2 as 2 more particles, then the answer is: 3 * 1.8 * 6.02 X 10^^23.

Explanation:

hope it helps U

Answer:1

Explanation:i know cuz I got it right

NaBr is classified as a compound because sodium and bromine are chemically combined in a fixed proportion.

Explanation:

So, from this, we can conclude that NaBr is classified as a compound because sodium and bromine are chemically combined in a fixed proportion.

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Answer:

The answer is "1.29".

Explanation:

Formula for electrostatic potential energy:

\(\to V=\frac{K Q_1 \times Q_2}{r}\)

where

\(\to K = \text{electrostatic constant}\\\\\to Q= \text{Charge on Cation}\\\\\)

The Charge on Cation is \(C_{s}^{+}\) is cation in both \(C_sI\) and \(C_sF\) were same:

\(\to V\ \alpha \ \frac{1}{r}\)

\(\to \frac{V(C_sF)}{V(C_sI)} = \frac{r(C_sI)}{r(C_sF)}\)

                \(= \frac{r(C_s^{+}) +r(I^{-})}{r(C_s^{+}) +r(F^{-})} \\\\=\frac{170+220}{170+133} \\\\=\frac{390}{303} \\\\ =1.2871 \\\\ =1.29\)

It is false because NaCl has a higher bond energy than Nal.

The melting point of a substance is determined by the strength of the intermolecular forces between its atoms or ions. In the case of NaCl, the strong electrostatic attraction between the positively charged Na+ ions and the negatively charged Cl- ions results in a relatively high melting point.

In contrast, NaI is a ionic compound with a lower bond energy between the atoms. So, it has lower melting point in comparision to NaCl. So the statement is False, NaCl has a higher melting point than NaI.

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Therefore, we need 6.0 × 1022 atoms of carbon to reach 12 g on the lab balance.

Carbon is an element found in nature that is essential for life on Earth. It is an abundant, non-metallic, and highly versatile element that is used in a variety of ways in many different fields. Carbon is found in all living organisms and is the basis of all life on Earth. It is also found in rocks, soil, and the atmosphere. Carbon is the fourth most abundant element in the universe and is the basis for organic compounds that form the basis of all living things. In industry, carbon is used to produce steel, glass, plastics, and many other materials. Carbon is also used in the manufacture of fuels and is a component of the chemical processes necessary for life. Carbon is also used in batteries, semiconductors, and solar cells.

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Answer:

Nuclear energy produces radioactive waste

A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years

Explanation:

Answer :

-111°C

Hope it helps

The final temperature of the gas in the balloon is equal to -110.6°C.

Gay-Lussac's law can be described as when the volume of the gas is kept constant then the pressure (P) is directly proportional to the absolute temperature (T in kelvin) of the gas.

The mathematical representation of Gay Lussca's law can be written as follows:

P/T = k

The pressure (P) of a gas is always directly proportional to the temperature (T) of the gas.

P ∝ T                               (where volume  is constant)

\(\frac{P_1}{T_1} =\frac{P_2}{T_2}\)

Where P₁, T₁, P₂, and T₂  are the initial and final pressure and temperature.

The initial temperature of the balloon, T₁ = 25 °C = 25 + 273 = 298 K

The initial pressure of the balloon, P₁  = 2.55 atm

The final pressure of the balloon, P₂ = 1.39 atm

Substituting temperatures and pressures of the gas in the balloon in the above equation:

2.55/298 = 1.39/T₂

T₂ = 162.4 K

T(K) = 273 + T(°C)

T(°C) = 162.4 - 273 = - 110.6°C

Therefore, the final temperature of the gas inside the balloon is -110.6°C.

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In the given reaction, carbon disulfide acts as an excess reagent and oxygen acts as a limiting reagent.

a) Oxygen is the limiting reactant.

b) 0.667 moles of carbon disulfide will still be present.

c) The formation of 0.333 moles of carbon dioxide and 0.667 moles of sulfur dioxide.

provided here,

To make 1 mole of carbon dioxide and 2 moles of sulfur dioxide from 1 mole of carbon disulfide, 3 moles of oxygen are required.

1.00 ol of carbon disulfide is the number of moles.

One mole of oxygen is equal to 1.00 mol.

The limiting reactant is oxygen. It will be totally eaten. (1.00 mol).

(B) An excess reactant is carbon disulfide. It will respond with

Oxygen reacts with 0.33 moles of carbon disulfide.

The extra reagent still present:

0.667 moles There will be a residue of carbon disulfide.

In order to make one mole of carbon disulfide and one mole each of carbon dioxide and sulfur dioxide, you need three moles of oxygen.

The carbon dioxide equivalent for 1 mole of oxygen is 1 mole/3, or 0.333 moles.

Sulfur dioxide is equal to 0.667 moles per 1.00 mol of oxygen (1.00 mol/(3/2)) mol.

Since carbon disulfide is an excess reagent in the above reaction, oxygen is a limiting reagent.

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Within 5 years the kinetic energy needed for the phase change of methane is increased by some factors. Hence, the arrow for change in kinetic energy for the phase change can be used here.

The phase change of a substance is the change from one state or phase to the other such as from solid to liquid, liquid to vapor etc. The minimum energy needed to overcome the barrier potential for a physical and chemical change is called its activation energy or activation potential.

A substance need kinetic energy to move apart its molecules which are strongly connected in liquid phase to convert it into vapor phase. If the activation potential increases, the substance need more kinetic energy.

Here, if the kinetic energy needed for the phase change of liquid methane increases. That is the reason why liquid methane in Titan not evaporated for some years.

Here the actual change in kinetic energy is increasing, thus, the methane gas is needed to gain more energy to evaporate. Hence, you have to add the first arrows given in the data.

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The reaction time decreases as the temperature increases of the reaction mixture increases.

A sample record of results is:

An increase in temperature leads to an increase in reaction rate or a decrease in reaction time.

The increase in temperature provides more thermal energy to the reactant molecules, which leads to an increase in the average kinetic energy of the molecules. As a result, more reactant molecules have sufficient energy to overcome the activation energy barrier and undergo successful collisions, leading to an increased reaction rate.

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The molarity of the NiSO₄ solution made by dissolving 38.81 grams of nickel (ii) sulfate, NiSO₄, in enough water to make 0.467 liters of solution is 0.535 M

First, we shall obtain the mole of 38.81 grams of nickel (ii) sulfate, NiSO₄. Details below:

Mole of NiSO₄ = mass / molar mass

= 38.81 / 154.75

= 0.25 mole

Now, we shall determine the molarity of the solution. Details below:

Molarity of solution = mole / volume

= 0.25 / 0.467

= 0.535 M

Thus, the molarity of the solution is 0.535 M

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