i/3 of 12 = 2/3 of
please help at 11 o'clock am it needs to be done ​

Answer: Your answer would be heat of combustion.

Explanation: When oxygen combines with another substance and gives off light and heat, this is called combustion.

Answer:

algun moderador puede acabar a este otro este me borró respuesta que no debió borrar

Answer:

The volume of the tank can be calculated using the ideal gas law, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature.

In this case, we have P = 179 atm, n = 7.75 moles, R = 0.08206 Latm/(Kmol), and T = 295 K. Plugging these values into the ideal gas law equation and solving for V gives us:

V = (nRT)/P V = (7.75 moles * 0.08206 Latm/(Kmol) * 295 K) / (179 atm) V ≈ 1.01 L

So the volume of this tank at these conditions is approximately 1.01 liters.

Explanation:

Answer:

Volume = 1.05 L (3 s.f.)

Explanation:

To find the volume of the tank, we can use the ideal gas law.

\(\boxed{\sf PV=nRT}\)

where:

The given values are:

Substitute the given values into the formula and solve for V:

\(\implies \sf 179 \cdot V=7.75 \cdot 0.082057366080960\cdot 295\)

\(\implies \sf V=\dfrac{7.75 \cdot 0.082057366080960\cdot 295}{179}\)

\(\implies \sf V=\dfrac{187.6036532 \dots }{179}\)

\(\implies \sf V=1.04806510 \dots\;L\)

\(\implies \sf V=1.05\;L\;(3\;s.f.)\)

Therefore, the volume of the tank in these conditions is 1.05 liters (3 s.f.).

Answer:

0.000000025

Explanation:

[H+]=10^-pH

Answer:

2.5 10^-8

Explanation:

At the completion of work, you should analyze the problem and solution and follow up with the customer to verify satisfaction.


1. Analyze the problem: Once you have completed the work, take some time to evaluate the problem you were trying to solve. Consider whether the solution addressed the problem effectively and if any additional steps or adjustments are needed.
2. Analyze the solution: Next, assess the solution itself. Determine if it achieved the desired outcome and if it met the requirements and expectations set by the customer. Consider if there are any areas for improvement or if any changes need to be made.

Remember, this process is crucial for maintaining good customer relationships and ensuring that the work you have done is effective and satisfactory. It allows you to make any necessary adjustments or improvements based on feedback and ensures that the customer's needs are met.

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Answer:

Sry man wish I knew trust me tho you should go over it with your parents just let them know that your struggling and maybe they will go over it and help you get a better understanding of it also try asking an older sibling but yeah good luck with that have a good night!

Explanation:

Answer:

magnesium sulphate

Explanation:

By neutralization reaction magnesium hydroxide(base) reacts with sulphuric acid(acid) to form salt known as magnesium sulphate

Answer:

6. 10 protons

10 electrons

neutral

7. 10 protons

8. Neon

9. 10 electrons

11. No

12. it's not an ion

Explanation:

count the number of electron in the shells, the number of electrons is equal to the number of protons, which is equal to the atomic number

The option which isn't a result of surface tension in water is: c. surface area is maximized.

Water can be defined as a liquid molecule that comprises the chemical element hydrogen and oxygen in the ratio of two to one (2:1).

Surface tension can be defined as a property of liquid such as water, which makes its surface to resist an external force due to the cohesive nature of its molecules.

This ultimately implies that, the surface tension of a liquid is mainly as a result of the cohesive forces existing between its molecules.

Generally, the surface tension of water is typically higher than the surface tension of most liquids.

Due to the effect of surface tension in water;

Additionally, the surface tension of a liquid such as water can be described as an inward force which tends to minimize its surface area rather than maximize its surface area.

In conclusion, surface tension in water doesn't maximize its surface area.

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thermal conduction and convection processes we explain the temperature profile: warmer at the bottom and colder at the top

Temperature is a measure of the internal energy of molecules.

When the pot is on the burner, the lower part of the pot acquires energy from the flame, this energy increases the temperature of the metal that is in contact with the liquid from the bottom, by a process of thermal conduction, while the liquid in the top is kept at the same temperature.

As time progresses, the hotter lower liquid, for which it has a lower with the metal bottom heats up by conduction. density, conscientiously rise and a transfer of heat is created by convection, which raises the temperature of the hot liquid and makes the liquid fall that is colder from the upper part than at the coming into contact

This cycle is repeated heating all the liquid. But the liquid with the liquid in the lower part always at a higher temperature than the liquid in the upper part, the process stops when the liquid in the lower part reaches the boiling point, than the passage from liquid to gas, during which the temperature remains constant.

With the thermal conduction and convection processes we explain the temperature profile: warmer at the bottom and colder at the top.

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When a secondary battery provides electrical energy, it is acting as a(n) galvanic cell, and when the battery is recharging, it is operating as a(n) electrolytic cell.

A galvanic or voltaic cell is a type of electrochemical cell that converts chemical energy into electrical energy through a spontaneous redox reaction. In a secondary battery, such as a rechargeable lithium-ion battery, this reaction is reversible, meaning that the battery can both discharge and recharge by reversing the direction of the current flow.

When a secondary battery is discharging, the chemical reactions inside the battery cause the transfer of electrons from the negative electrode (anode) to the positive electrode (cathode), creating an electrical current that can power an external device. This process is known as a galvanic or voltaic cell, and it is similar to the process that occurs in a primary battery.

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The formula for 504 grammes of C6H12 is 5.988630157885872 moles of C6H12, and the given molecule is C6H12 C 6 H 12. Twelve hydrogen atoms and six carbon atoms this molecule. The solution is therefore 84g/mol.

To precisely determine its molarity, n, of a material with such a mass m, m (in grammes), use the grammes into moles formula. M represents the substance's molar mass, and n = m / M.

The amount of moles per litre, denoted by the unit sign mol/L and mol/dm3 in SI units, is the most often used unit denoting molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.

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Answer:

Its the second one.

Explanation:

Answer:Tungsten is made of tungsten while Nichrome is made of nickel chromium. ... Tungsten is used to make filament of bulbs. Nichrome have high resistivity than tungsten.

Explanation:i hope u have a wonderful night and stay safe

answer and explanation

1 L = 1000 mL

and so to determine 7.8L we can o the calculation as follows

x mL = 1000 mL/ 1 L x 7.8 L/1 = 7800 mL/1 = 7800 mL

False. According to the Valence bond theory, bonds are formed in molecules through the overlap of valence electron atomic orbital containing single electron.

Valence bond theory is said to be theory which is introduced to describe bonding in covalent molecules. According to this, bonds are considered to form from the overlapping of two atomic orbitals on different atoms that each orbital containing a single electron. This theory describes the covalent bond as the overlap of half-filled atomic orbitals that each containing a single electron that yield a pair of electrons shared between the two bonded atoms. According to the valence bond theory, an orbital on one atom overlaps an orbital on a second atom and the single electrons in each orbital combine to form an electron pair. The orbitals on two different atoms overlap when a portion of one orbital and a portion of a second orbital occupy the same region of space.

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It is generally safe to rinse your mouth with hydrogen peroxide. Hydrogen peroxide has been used as a mouth rinse for many years and is available in many over-the-counter products.

It is often used to treat bad breath, gum disease, and oral infections. When used as a mouth rinse, hydrogen peroxide helps to reduce the amount of bacteria in the mouth. It also helps to break down plaque and tartar, which can lead to cavities and gum disease. Rinsing with hydrogen peroxide can also help to whiten teeth, as it is able to break down certain types of stains. However, it is important to use hydrogen peroxide safely. It should be used in a diluted form (usually three percent) and should be rinsed with water afterwards. It should not be swallowed, as it can cause nausea, vomiting, and diarrhea. Additionally, using hydrogen peroxide too often can damage the enamel of the teeth. Overall, it is generally safe to rinse your mouth with hydrogen peroxide, but it is important to do so in a diluted form and follow up with a water rinse.

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The medication can treat people who have the disease described. According to the commercial, the drug has FDA approval to treat a condition whose symptoms are listed.

Additionally, the narrator notes that the medication only comes with a prescription and has 1% of the active substance. We can deduce from this information that the drug can effectively treat persons who have the condition generating these symptoms, but obtaining it requires a prescription. The commercial provides no support for the other possibilities.

Therefore, the correct option is D.

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Answer:

A dependent valuable is a valuable whose variation depend on another variable usually the independent variable. An independent variable is a variable whose variation do not depend on another variable but the reseacher experimenting.

Answer

acidic

Explanation

The pH scale ranges from 0 to 14, with 7 being neutral. pHs less than 7 are acidic while pHs greater than 7 are alkaline (basic).

Hence, coffee has a pH of about 5 which means it is considered to be in the acidic range.

Answer:

Oxygen Doesn't change

However, Li is oxidized (0 to +1), Na is reduced (+1 to 0)

Explanation:

On reactant side, Oxygen has -2 oxidation charge because we know common oxidation states such as oxygen -2, hydrogen +1 etc.

So NaOH, O is -2, H is +1, so Na has to be +1 to equal total charge of compound

In product side, LiOH, again O has to be -2, H is +1, so Li +1 as well..

We see that oxygen oxidation state doesn't change. However, for Li it becomes oxidized going from 0 to +1 whereas, Na is reduced going from +1 to 0.

Hence option C is the correct option.

Therefore, the formula of the hydrate is MgCO3•0.449H2O.

The formula of the hydrate can be determined by calculating the number of moles of water driven off during the heating process and then using this information to determine the formula of the hydrate.

First, calculate the number of moles of water driven off:

15.67 g - 7.58 g = 8.09 g

Next, convert the mass of water driven off to moles:

8.09 g / (18.015 g/mol) = 0.449 mol

Finally, use the number of moles of water driven off to determine the formula of the hydrate:

(0.449 mol H2O) / (1 mol MgCO3•xH2O) = x

x = 0.449

So, the formula of the hydrate is MgCO3•0.449H2O.

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The molecular formula of this compound is C₂H₂N.

Divide the molar mass of the compound by the molar mass of the molecular formula. The result will be an integer or very close to an integer. Multiply all subscripts of the molecular formula by the integers found in step 2. The result is a sum expression. A molecular formula is a formula that defines the number of atoms for each element in the molecule of a compound.

Displays the actual number of each atom in the molecule. Molecular compounds are inorganic compounds that take the form of discrete molecules. Examples are familiar substances such as water (H2O) and carbon dioxide. These compounds are very different from ionic compounds such as sodium chloride.

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Explanation:

To find the amount of product that would be formed from two or more reactants, we need to follow the following steps;

Useful expression:

    Mass   =  number of moles x molar mass

Answer:

81m + 103 m

= 184 m to the east

Answer:

stable, because there is always an equal amount of force surrounding the atom  

The Henry's Law constant for argon if the partial pressure of argon in air is 0.0984 atm is 1.52 mole/L *atm.

Henry's regulation states that at a regular temperature, the amount of a given fuel that dissolves in a liquid is immediately proportional to the partial pressure of that gas in equilibrium with that liquid. Henry's regulation states that the solubility of a fuel in a liquid is immediately proportional to the pressure of the gas.

Pressure of argon =  p = 0.0984 atm

Molar solubility at 25°C, S = 0.150 mol/l

Calculating the Henry's Law constant,

     S =KP

       K =S/P

         0.150/0.0984

         = 1.52 mol/L atm

Hence the  Henry's Law constant (K) = = 1.52 mol/L atm

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Answer:

0.03738970038

Explanation:

7.50 x 0.0049852933845157 = 0.03738970038