What is a physical property of water? *
not flammable
reacts with sodium
liquid at room temperature

Answer:

ionic bonds

Explanation:

The statement " Chemical bonds hold molecules of a substance together." and "All molecules are composed of atoms" are true  about atoms and molecules.

Chemical bonds hold molecules of a substance together. This is true because molecules are formed by the sharing or transfer of electrons between atoms, which creates attractive forces between them. These attractive forces are known as chemical bonds, which are responsible for holding the atoms together to form a molecule.

Not all substances are composed of molecules. Some substances, such as noble gases like helium and neon, exist as individual atoms rather than molecules. Other substances, such as ionic compounds, are composed of ions held together by ionic bonds rather than molecules.

All molecules are composed of atoms. This is true because molecules are formed by the combination of two or more atoms held together by chemical bonds.

Not all substances are held together by chemical bonds. Some substances, such as mixtures, are held together by physical forces such as van der Waals forces or hydrogen bonding. However, most substances are held together by chemical bonds, which are responsible for the formation and properties of the substance.

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In the preceding equation, 6.67 moles of boric acid (\(H_3BO_3\)) will react to generate 10 moles of water (\(H_2O\)).

To determine the number of moles of boric acid that react in the equation to produce 10 moles of water, we need to examine the balanced chemical equation and use stoichiometry.

1. Begin by examining the balanced chemical equation for the reaction involving boric acid and water. Let's assume the equation is:

  \(3H_2O\) + \(3H_2O\) -> \(B_2O_3\) + \(6H_2O\)

2. From the balanced equation, we can see that 2 moles of boric acid (H3BO3) react with 3 moles of water (\(H_2O\)) to produce 6 moles of water (\(H_2O\)).

3. Use the given information that 10 moles of water (\(H_2O\)) are produced. Since the stoichiometric ratio between boric acid and water is 2:3, we can set up a proportion to find the number of moles of boric acid:

  2 moles \(H_3BO_3\) / 3 moles \(H_2O\) = x moles \(H_3BO_3\) / 10 moles \(H_2O\)

4. Cross-multiply and solve for x:

  (2 moles \(H_3BO_3\))(10 moles \(H_2O\)) = (3 moles \(H_2O\))(x moles \(H_3BO_3\))

  20 moles \(H_2O\) = 3x moles \(H_3BO_3\)

5. Divide both sides of the equation by 3 to isolate x:

  x moles \(H_3BO_3\) = (20 moles \(H_2O\)) / 3

6. Calculate the value of x:

  x moles \(H_3BO_3\) ≈ 6.67 moles \(H_3BO_3\)

Therefore, approximately 6.67 moles of boric acid (\(H_3BO_3\)) will react to produce 10 moles of water (\(H_2O\)) in the given equation.

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Answer:

a. pH = 2.22.

b. [H+] = 2.588 x 10⁻⁴ mol/L.

Explanation:

Acids and Bases => Calculating pH of Acids and Bases.

As we saw before, the formulas to find the pH based on the hydrogen ion concentration [H+], and to find the hydrogen ion concentration [H+] based on the pH are the following, respectively:

So let's see each case:

a. To find the pH of an H+ concentration of 6.02 x 10⁻³ mol/L we use the pH formula:

The answer would be that the pH is 2.22.

b. To find the H+ concentration of a pH of 3.587, we use the [H+] formula:

The answer would be that the hydrogen ion concentration [H+] = 2.588 x 10⁻⁴ mol/L.

Answer:

rough and bumpy and not smooth

Explanation:

Answer:

A part is called Chloroplasts

Answer:

2.05g

Explanation:

The weight of butane gas present in the system with the specified temperature and pressure is 2.05 g. We can use ideal gas law here.

Ideal gas law states the relation between temperature, pressure and volume  and mathematically written as below:

PV = nRT

Here, P and V be the pressure and volume and n be the no.of moles and R be the universal  gas constant. T is the absolute temperature in kelvin.

The system have a volume of 3000 mL or 3 L and pressure of 760 torr and temperature of 1000 K. The no. of moles n is the ratio of taken weight to the molar mass. R has the value 62.36 L torr/(K mol)

Apply these values into ideal gas law as given below:

(3 L × 760 torr)  = (w/56.1 g/mol) × 62.36 L torr/(K mol) × 1000 K. From this,

\(2280 \textup{ torr L} = \frac{w}{56.1 g/mol} \times 62360 \textup{ L torr/mol}\)

\(w = \frac{2280\textup{ torr L}\times 56.1\textup{ g/mol}}{62360 \textup{ L torr/mol}} =2.05 g\)

Therefore, the amount of butane gas for the given system is 2.05 g.

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According to the research, the correct option is false, the statement related to a chemical reaction is false.

They are reactions involving two or more substances (reactants), which change significantly in the process, and can consume or release energy.

Every chemical reaction subjects matter to a chemical transformation, altering its structure and molecular composition.

Therefore, we can conclude that according to the research, the correct option is false, the statement related to a chemical reaction is false.

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Small amounts of mass are changed into power from the breaking up fission or mixture fusion of the nuclei of atoms.

The potential or strength to do paintings, inclusive of the capacity to move an item  through the utility of force. power can exist in a selection of bureaucracy, along with electrical, mechanical, chemical, thermal, or nuclear, and can be transformed from one form to some other.

In physics, electricity is the quantitative asset this is transferred to a frame or to a physical gadget, recognizable in the performance of labor and inside the shape of warmth and mild. electricity is a conserved amount the law of conservation of strength states that strength may be transformed in form, however now not created or destroyed.

Scientists define strength as the potential to do work. contemporary civilization is possible because human beings have found a way to exchange energy from one shape to other and then use it to do paintings.

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Answer:

copper carbonate reaction is known as the termed of thermal decomposition

reaction

Electrolysis occur when an electric current is passed through a liquid or solution thereby causing the decomposition of chemicals.

For magnesium chloride, it will be heated to be able to conduct electricity. When molten, the MgCl2 will decomposes into Mg2+ and 2Cl- ions. During electrolysis, the elements are separated according to the equations;

According to the half reactions, the Mg2+ is reduced at the cathode (-) and the Cl- is oxidized at the anode (+). Reduction at the cathode shows that magnesium gains two electrons to form a magnesium solid while the chlorine ion looses two electrons at the anode

Answer:

10CO²+4H²O

Explanation:

that Brainliest me pls

We need to add 2.88 mL of 0.202 M NaOH to 25.0 mL of 0.0233 M salicylic acid to adjust the pH to 3.50.

Salicylic acid has two dissociation constants (pKa values) of 2.97 and 13.02. For this problem, we'll assume that we're interested in the first pKa value of 2.97, which corresponds to the dissociation of the carboxyl group (COOH) of salicylic acid.

The Henderson-Hasselbalch equation for a weak acid is:

pH = pKa + log([A-]/[HA])

where pH is the desired pH, pKa is the dissociation constant, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

Rearranging the equation and solving for [A-]/[HA], we get:

[A-]/[HA] = 10^(pH - pKa)

Substituting the given values, we get:

[A-]/[HA] = 10^(3.50 - 2.97) = 3.98

So the concentration of the conjugate base ([A-]) is 3.98 times higher than the concentration of the weak acid ([HA]) at pH 3.50.

We can use the balanced chemical equation for the reaction of salicylic acid with NaOH:

C7H6O3 (salicylic acid) + NaOH → NaC7H5O3 (sodium salicylate) + H2O

From the equation, we can see that the stoichiometric ratio of salicylic acid to NaOH is 1:1. So we need to add enough NaOH to convert all of the salicylic acid into sodium salicylate.

The amount of salicylic acid in 25.0 mL of a 0.0233 M solution can be calculated as follows:

moles of salicylic acid = M × V = 0.0233 mol/L × 0.0250 L = 5.83 × 10^-4 mol

Since the stoichiometric ratio of salicylic acid to NaOH is 1:1, we need to add 5.83 × 10^-4 mol of NaOH to the solution.

The amount of NaOH required can be calculated as follows:

moles of NaOH = moles of salicylic acid = 5.83 × 10^-4 mol

The concentration of the NaOH solution is 0.202 M, so we can use the following formula to calculate the volume of NaOH required:

V = moles of NaOH / (concentration of NaOH)

V = (5.83 × 10^-4 mol) / (0.202 mol/L) = 2.88 × 10^-3 L

Multiplying by 1000 mL/L, the volume of NaOH required is 2.88 mL.

Therefore, we need to add 2.88 mL of 0.202 M NaOH to 25.0 mL of 0.0233 M salicylic acid to adjust the pH to 3.50.

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While ethanol being an alcohol does have a direct O−H connection. Hence, ethanol has intermolecular hydrogen bonds. Therefore, more stroger physical bonds have to be destroyed in ethanol, than in acetone. Hence, acetone evaporates faster than ethanol inspite of having higher surface tension.

The pressure that a vapour exerts on the condensed phases (solid or liquid) in a closed system when they are in thermodynamic equilibrium with one another is known as vapour pressure (or equilibrium vapour pressure).

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Answer:

The answers are 1:3:13

Explanation:

when I had to do these types of equations just search them up on you-tube lol theres this guy called Wayne Breslyn that does a really good job of explaining and has like the answers for any and everyy balancing equation

Answer:

C

Explanation:

The answer is in the image.

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Walk in faith and trust in God!

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 25 \times {2.5}^{2} \\ = 12.5 \times 6.25 \\ = 78.125 \: \: \: \: \: \: \: \: \)

We have the final answer as

Hope this helps you

Answer:

FLUORINE

The most reactive nonmetal is fluorine. Fluorine is a halogen, which is Group 17 on the periodic table, and the halogens are the most reactive nonmetals. This is because they all have one empty space in their valence electron shells.

Explanation:

I apologize, but it seems like the equation you provided is incomplete. Please provide the complete balanced equation for the reaction involving nitrosyl chloride and chlorine, and I'll be happy to assist you with the questions about the system.

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Answer:

Cotton Shirts

Explanation:

I would think that the cotton shirts would be more appropriate form of of clothing for summer.

Cotton has tiny pores that enable the sweat to evaporate off your skin, and hence keep you cooler. At the same time it absorbs this sweat, allowing easy evaporation. Synthetic fibers hold heat in, and do not allow sweat to evaporate.

It would be that Rana should buy cottons shirts for summer.

The formation constant expression relates to the equilibrium constant for the formation of a complex ion.

In this case, the hydrated metal ion (M(H2O)n) is forming a complex with two cyanide ions (CN^-) to form the aqueous complex (M(CN)2(H2O)n). The formation constant expression for this equilibrium is:

Kf = [M(CN)2(H2O)n] / [M(H2O)n] [CN^-]^2

where Kf is the formation constant, [M(CN)2(H2O)n] is the concentration of the aqueous complex, [M(H2O)n] is the concentration of the hydrated metal ion, and [CN^-] is the concentration of the cyanide ion.

The balanced chemical equation for the last step in the formation of the complex is:

M(H2O)n + 2CN^- → M(CN)2(H2O)n

where M represents the metal ion and n represents the number of water molecules associated with the metal ion. This equation shows that two cyanide ions are needed to form the complex with the hydrated metal ion.

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The absolute error that could be expected when measuring the half-life of radon-220 is 0.416 s

The following data were obtained from the question:

We can obtaine the absolute error as illustrated below:

Percentage error = (Absolute error / Actaul measurement) × 100

0.8% = Absolute error / 52

0.008 = Absolute error / 52

Cross multiply

Absolute error = 0.008 ×52

Absolute error = 0.416 s

Thus, the absolute error in measuring the half-life is 0.416 s

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The Zn²⁺ concentration is 0.031 M.

The Zn²⁺ concentration can be calculated using the Nernst equation:

E = E° - (RT/nF) * ln(Q)

where E is the measured cell potential, E° is the standard cell potential, R is the gas constant, T is the temperature in Kelvin, n is the number of moles of electrons transferred, F is Faraday's constant, and Q is the reaction quotient.

For the given reaction, the standard cell potential E° is 0.79 V, n is 2 (two electrons are transferred), and F is 96485 C/mol.

The reaction quotient Q can be written as:

Q = [Hg²⁺] / [Zn²⁺]

Substituting the given values into the Nernst equation and solving for [Zn²⁺], we get:

ln([Hg²⁺]/[Zn²⁺]) = (E° - E)/(0.0257)

ln([1.34 M]/[Zn²⁺]) = (0.79 - 1.712)/(0.0257)

ln([Zn²⁺]/[1.34 M]) = (1.712 - 0.79)/(0.0257)

[Zn²⁺] = [1.34 M] / \(e^{(-35.3)\)

[Zn²⁺] = 0.031 M (to three significant figures)

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Answer:

Standard pressure is always 1.00atm. Example #1: How many moles of oxygen will occupy a volume of 2.50 L at STP? Standard temperature = 273K law.

Explanation:

Answer:

2.07 atm

Explanation:

Answer:

+4

Explanation:

In PbO2, oxygen exhibits an oxidation number of -2 (since it's not a peroxide or superoxide):

Let the oxidation number of Pb be x. Then, for the compound to be neutral, the oxidation numbers of all atoms should add up to zero.

⇒ x + (−2) + (−2) = 0

x = +4

So the oxidation no. of Pb is +4.

I hope this helps.

The final volume of the sample is approximately 5.01 L.

By giving the reactants of the reaction hydrogens or electrons, reducing agents aid in the reduction process. Diborane is therefore another source of hydrogens that is present. In various processes involving organic chemicals, it serves as a reducing agent. This is how diborane is structured. Boron and hydrogen are the main components of this colourless chemical. Tetrahedral geometry describes it.

P1V1/T1 = P2V2/T2

Plugging in the given values, we get:

345 torr * 3.48 L / 258.15 K = 468 torr * V2 / 309.15 K

Simplifying and solving for V2, we get:

V2 = (345 torr * 3.48 L * 309.15 K) / (468 torr * 258.15 K)

V2 ≈ 5.01 L

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The empitical formula shows the simplest ratio of elements in a compound (not the total number of atoms in the molecule).

So to find the empirical formula we need to calculate how many moles of each atom we have in this sample. Then we will see the ratio of each element.

We are given the mass, so to convert it to moles we use the molar mass. For this we go to the periodic table and see that the values for each element are:

Na (sodium): 22,99 g/mol

H (hydrogen): 1 g/mol

P (phosphorus): 25,81 g/mol

So we calculate the moles of each element as follows:

And as we see, for every 0.833 moles of Na we have the same number of moles of P, so the ratio of these elements in the molecule is 1 to 1.

As for the hydrogen:

So the ratio Na to H is 1 to 2.

Now we can write the empirical formula as follows=

The size of the particles decides whether vacancy or interstitial diffusion is more likely.

In vacancy diffusion, the atoms moves in a particular direction and the vacancies are filled and new vacancies are created on the places of the atoms.

While in Interstitial diffusion, the atoms moves inside the lattice of the structure of the crystals.

Interstitial diffusion is faster than vacancy diffusion because it is easier to move inside the lattice, and if the size of the atom is small, it will prefer interstitial diffusion over vacancy diffusion. So, smaller the size of the atoms, faster is the rate of interstitial diffusion.

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