use the clean 25 ml graduated cylinder to accurately measure 10.0 ml of 2m naoh from the dropper bottle. when nearing 10.0 ml mark, add drops slowly to ensure a measurement of exactly 10.0 ml.

The spectrum of the first compound will have only one signal, but the spectrum of the second compound will have two signals.

A compound is a substance formed by combining two or more different chemical elements in such a way that the atoms of the individual elements are linked together by chemical bonds that are difficult to break in chemistry.

Hence it is right to state that the spectrum of the first compound will have only one signal, but the spectrum of the second compound will have two signals.

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Answer: Total volume of a cylinder shaped tank is the area, A, of the circular end times the length, l. A = π r 2 where r is the radius which is equal to 1/2 the diameter or d/2. Therefore: V(tank) = π r 2 l Calculate the filled volume of a horizontal cylinder tank by first finding the area, A, of a circular segment and multiplying it by the length, l.

Answer:

the answer is adaptations

Explanation:

A body part or behavior that helps an animal meet its need in its environment is called an adaptation. All adaptions are inherited traits. Camouflage is an animal's color or pattern that help it blend in with its surroundings.

Answer: 80

Explanation:

Answer:

Jamal moved his box to storage, but Jude could not move his.

Explanation:

The force they exert needs to be higher than the force of gravity in order for them to move the boxes. Jamal's force is 60N, which is 10N above the force of gravity on the box, which is 50N. However, Jude's force is only 45N and that is lower than 50N, so he won't be able to move the box while Jamal can.

Explanation:

a) blue litmus paper turns red when u add acid in it .

b) red litmus paper , when an alkali dissolves in water it produce hydroxide ions

which cause it to become a alkaline

Answer: nitrogen

Explanation:

From the equation, we know that for every 3 moles of hydrogen consumed, 1 mole of nitrogen is consumed.

Therefore, nitrogen is the limiting reactant.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{5.66 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{5.66}{6.02} \\ = 0.940199...\)

We have the final answer as

Hope this helps you

Answer:

0.854

Explanation:

The equation of its dissolution in water is: AgNO3 → Ag + (aq)  +  NO3- (aq)

and     AgNO3 →   Ag + (aq)  +  NO3- (aq)

         1 mol          1mol                1mol

            ?  --------   0.854mo

so for finding the value, it is sufficients to complute 1 x 0.854 mol =0.854 mol

so,  0.854 mol is required for the reaction to form 0.854 mol of Ag

Answer: diamond

Explanation:

Diamond is a giant covalent molecule, containing millions of carbon atoms. Because of this, diamond is classified as a macromolecule.

Answer:

Resources

Explanation:

Answer:

Explanation:

M

A container with no insulation has two compartments. the first compartment is evacuated to zero pressure, and the other contains a compressed gas that is not an ideal gas. supposed the separation between the two compartments is removed-Isothermal process

thermodynamic process wherein the temperature of a framework remains unchanged is known as an isothermal process. Heat is transferred into and out of the system at such a slow rate that thermal equilibrium is retained. The formula gives the value of work done either by gas in an isothermal process. W=−nRTln(V2V1) Isothermal, named after the region's consistent climate, is a two-year comprehensive public institution that is part of the North Carolina Community College System. The primary goal of Isothermal is to improve people's lives through education. Spindale's main campus spans 181 acres.

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The first step of the reaction, we have  reaction between a nucleophile and an electrophile.

We can see that in the first step of the reaction, we have  reaction between a nucleophile and an electrophile. In this case, the electrophile would have to be an alkyl halide which produces a carbocation as show in the image attached. What we have here is quite similar or  like most of the organic reactions, this reaction occurs in a number of detailed or smaller steps and each step of the reaction is going to help to bring us closer to the end product of the entire steps of the reaction which is wat we target as we carry out the particular reaction.The second step involves the reduction of the alkyne with the use of a Lindlar catalyst. As such the reaction is poisoned and it stops at the alkyne stage rather than going on to obtain the alkane.

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Only when an electric current is running through the coil of insulated wire that is wrapped around the iron nail will it behave like a magnet. The iron nail loses its magnetism when the electric current in the coil is stopped.

An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume.

An electromagnet is a magnet that consists of a piece of steel or iron encircled by a coil. When an electric current is run through the coil, the metal turns magnetic.

Thus,  The iron nail loses its magnetism when the electric current in the coil is stopped.

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The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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The chemical formula based on mentioned information is K1Cl6Re1.

Firstly calculating the mass of Rhenium. Using law of conservation of mass for the calculation.

Total mass = sum of individual mass of chlorine, potassium and Rhenium

Mass of Rhenium = 5 - (0.530 + 1.935)

Mass of Rhenium = 2.535 grams

Now calculating the number of moles of each atom. Number of moles will be calculated by division and the formula is -

Number of moles = mass ÷ molar mass

Number of moles of Potassium = 0.5÷39

Number of moles of Potassium = 0.01

Number of moles of Chlorine = 1.935 ÷ 35

Number of moles of Chlorine = 0.06

Number of moles of Rhenium = 2.535 ÷ 186

Number of moles of Rhenium = 0.01

So, predicting the chemical formula -

K : Cl : Re = 0.01 : 0.06 : 0.01

Multiplying all the three ratio with 100

K : Cl : Re = 1 : 6 : 1

So, the chemical formula is K1Cl6Re1.

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Answer:

devil's tango

It saves energy, minimizes air and water pollution, cuts greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and otherwise decreased its trash by 62% and reduced landfill by 35%.

It saves energy, minimizes air and water pollution, cuts greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and otherwise decreased its trash by 62% and reduced landfill by 35%. The process of transforming waste resources into new materials and things is known as recycling. This notion frequently includes the recovery of energy from waste materials. The capacity of a material to regain the attributes it had in its original form determines its recyclability. Recycling is the collection and processing of items that would otherwise be discarded as waste in order to create new goods. Recycling may help your town, economy, and environment.

Here,

It saves energy, decreases air and water pollution, lowers greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and avoided landfill by 62% and 35%, respectively.

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Three factors that must be known about component substances to determine if solvation will occur are solute-solvent interactions.

Solute-Solvent Interactions: The nature and strength of interactions between the solute and solvent molecules play a crucial role in determining solvation. If the solute-solvent interactions are favorable, solvation is more likely to occur.If the solute and solvent have similar chemical properties or can form hydrogen bonds, solvation is more favorable.

Polarity of the Solute and Solvent: The polarity of the solute and solvent influences their ability to mix and dissolve. Polar solvents tend to dissolve polar solutes, while nonpolar solvents dissolve nonpolar solutes. Polar solvents have a positive and negative end, allowing them to interact with polar solutes through dipole-dipole interactions.

Solubility of the Solute in the Solvent: The solubility of a solute in a specific solvent is a critical factor in determining solvation. Solubility refers to the maximum amount of solute that can dissolve in a given amount of solvent at a particular temperature.

If the solute's solubility in the solvent is high, solvation is likely to occur. If the solute is insoluble or has low solubility in the solvent, solvation may not occur, and the solute may remain in a separate phase.

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Through a procedure known as polymerization, monomers are joined to produce polymers.

the process of polymerization involves the joining of monomers, or small organic molecules, to create polymers, which are larger molecules that resemble long chains. Condensation and addition polymerization are the two primary forms of polymerization.

The method of addition polymerization involves joining together monomers with double or triple bonds to create polymers without losing any atoms. Plastics such as polyethylene and polypropylene are produced using this method of polymerization.

In the process of condensation polymerization, functional monomers like amines and carboxylic acids are linked together to form polymers by removing a tiny molecule like water. Polyamides, polyesters, and polyurethanes are produced using this form of polymerization.

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A molecule is made up of two or more atoms held together by chemical bonds in a stable association. The atoms may or may not belong to the same element

Molecules refer to groups of two or more atoms that are held together by chemical bonds in a stable association. This bond is formed when the electrons that orbit the atoms' nucleus intermingle. As a result, the atoms' outermost shells fill up with electrons, providing stability to the molecule. The atoms in a molecule may belong to the same element or to different elements.

When they belong to different elements, the molecule formed is called a compound molecule. For example, carbon dioxide (CO₂) is a compound molecule that consists of one carbon atom and two oxygen atoms. The bond between these atoms is formed because the carbon atom requires two more electrons to fill its outer shell while the oxygen atoms require two electrons each to fill their outer shells, resulting in a stable molecule.

Therefore, a molecule is made up of two or more atoms held together by chemical bonds in a stable association. The atoms may or may not belong to the same element.

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Answer:

Given

Number of moles = 0.5

Temperature = 293 K

Volume in which gas is trapped = 2 litre

From ideal gas law,

PV = nRT

where R is the universal gas constant, R = 0.08206 L.atm/mol

So putting the value in the ideal gas equation,

P *(2) = (0.5)*(0.08206 )(293)

P = (0.5)*(0.08206 )(293)/(2)

P = 12.02179/2

P = 6.01 atm ≈ 6.0 atm (approx)

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Answer:

13.75

Explanation:

Density is equal to mass divided by volume. 110/8 = 13.75

Answer:

it has oxidized because it has has given out 2 ions

Answer:

Oxidised

Explanation:

Mg -------> Mg2+ +2electrons

In this case Mg loses two electrons and loss of electron is oxidation so Mg oxidised.

Answer:

Temperature <3

Explanation:

Since it's use to measure kinetic energy, have a nice day! :)

The correct option is D) Methane (CH₄), which will yield the greatest mass of CO₂.

The combustion chemical reaction and stoichiometry for carbon dioxide are presented below for this situations possibilities, assuming a mass of 100 g for each compounds :

Option A. Benzene C₆H₆ :

C₆H₆ + \(\frac{15}{2}\)O₂  → 6CO₂ + 3H₂O

Since m(CO₂) = 100gC₆H₆ ×  \(\frac{1 mol C6H6}{78g C6H6}\) ×\(\frac{6 mol CO2}{1mol C6H6}\) × \(\frac{44g CO2}{1 mol CO2}\)

m(CO₂) = 347.4 g of CO₂

Option B. Cyclohexane C₆H₁₂

C₆H₁₂ + 9O₂  → 6CO₂ +  6H₂O

m(CO₂) = 100gC₆H₁₂ × \(\frac{1 mol C6H12}{84 g C6H12}\) × \(\frac{6 mol CO2} {1 mol C6H12}\) × \(\frac{44g CO2}{1 mol CO2}\)

m(CO₂) = 314.3 g CO₂

Option C. Glucose C₆H₁₂O₆

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

m(CO₂) = 100gC₆H₁₂O₆ × \(\frac{1mol C6H12O6}{180g C6H12O6}\) × \(\frac{6mol CO2}{1mol C6H12O6}\) × \(\frac{44g CO2}{1mol CO2}\)

m(CO₂) = 146.7 g CO₂

Option D. Methane CH₄

CH₄ + 2O₂ → CO₂ + 2H₂O

m(CO₂) = 100gCH₄ × \(\frac{1mol CH4}{16g CH4}\) × \(\frac{6mol CO2}{1mol CH4}\) × \(\frac{44g CO2}{1mol CO2}\)

m(CO₂) = 1650 g CO₂

As a result, D) Methane CH4 produces the greatest mass of carbon dioxide for equal masses.

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To calculate the pH of a 0.24 M solution of sodium propionate (NaC2H5CO2), we need to consider the dissociation of propionic acid (HC2H5CO2) and the hydrolysis of sodium propionate.

1. First, let's consider the dissociation of propionic acid:

HC2H5CO2 ⇌ H+ + C2H5CO2-

The equilibrium constant expression for this dissociation can be written as:

Ka = [H+][C2H5CO2-] / [HC2H5CO2]

Given that the pKa of propionic acid is 4.89, we can calculate the value of Ka as:

Ka = 10^(-pKa) = 10^(-4.89)

2. Since we have a 0.24 M solution of sodium propionate, the concentration of propionic acid can be assumed to be the same, as sodium propionate will hydrolyze to form propionic acid and sodium hydroxide:

[HC2H5CO2] = 0.24 M

3. The hydrolysis of sodium propionate can be represented as:

NaC2H5CO2 + H2O ⇌ NaOH + HC2H5CO2

Since sodium hydroxide is a strong base, it will completely dissociate in water, resulting in the formation of Na+ and OH- ions. Therefore, the concentration of NaOH will be equal to the concentration of OH-, which we can assume to be x M.

4. The concentration of HC2H5CO2 can be calculated using the initial concentration and the hydrolysis reaction:

[HC2H5CO2] = 0.24 M - x

5. From the dissociation equation, we know that the concentration of H+ ions will also be x M.

6. To calculate the pH, we can use the equation for the ionization constant (Ka):

Ka = [H+][C2H5CO2-] / [HC2H5CO2]

Substituting the values, we have:

10^(-4.89) = x * x / (0.24 - x)

Solving this equation will give us the value of x, which represents the concentration of H+ ions. Once we have x, we can calculate the pH using the formula:

pH = -log[H+]

However, solving this equation requires numerical methods or approximations, and it cannot be solved analytically. Therefore, I'm unable to provide the exact pH value based on the given information.

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Answer:

1. a) Crystalline hydrated salt lose their mass or moisture on exposure to the air and change into amorphous salt, the phenomenon is called efflorescence.

b) Two salts that x could be are gypsum (Caso4.H2O) and copper (II) sulfate (CuSO4.H2O).

Gypsum (Caso4.H2O) form anhydrite(CaSO4), when exposed to air and copper (II) sulfate (CuSO4.H2O) form a white layer of anhydrous copper (II) Sulfate when expose to sir.

2. a) Salt hydrolysis is defined as the ions from salts react with water and form either basic or an acidic solution.

b) Two examples of salts that produce alkaline solutions when dissolving in water are sodium bicarbonate (NaHCO3) and Calcium Carbonate (CaCO3).

Answer:

The chemical energy in food can be converted to another form of chemical energy when it is stored as glucose or fat. It can be converted to thermal energy because our body produces heat when digesting our food. The chemical energy in our food can also be converted to mechanical energy in the form of muscle movement.

PUT IN YOUR OWN WORDS!!!

A single replacement reaction is one in which one element is replaced by another. The reaction in the balanced equation is Zn(s) + H2SO4(aq) ZnSO4(aq) + H2 (g).

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A single displacement reaction is one in which one element is replaced by another. The reaction in the balanced equation is Zn(s) + H2SO4(aq) ZnSO4(aq) + H2 (g). So, choice B is the right one.

When an element from a compound is replaced by another element from the reactant to create a product, the reaction is referred to as a single displacement reaction.

The replacement or substitution is determined by the activity series or reactivity. The weaker and less powerful element will be replaced by the one with greater strength.

The equation for the balanced single-displacement reaction is

H2SO4(aq) + Zn(s) ZnSO4(aq) + H2 (g)

Here, zinc replaces hydrogen because it is more reactive than hydrogen and creates zinc sulphate as a result.

The balanced equation is therefore option B: Zn(s) + H2SO4(aq) ZnSO4(aq) + H2(g).

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