At what temperature does water freeze?

We can see from the calculation of the number of moles of the neon that we are going to have about  2.2 moles

The mole is a unit of measurement for substance amounts in chemistry. One mole is the volume of a substance that contains the same number of elementary particles as there are in 12 grams of carbon-12. These particles can be atoms, molecules, ions, or electrons. Avogadro's number, or about 6.022 x 1023 particles per mole, is the quantity of things.

We know that;

1 mole of the Ne occupies 22.4 L

x moles will occupy 48.41L

x = 2.2 moles

Learn more about moles:https://brainly.com/question/26416088

#SPJ1

Some applications of fission reactions are as a zero-waste energy source for generating large amounts of heat and as the energy source in nuclear weapons.

Nuclear fission reactions are reactions in which the nucleus of heavier atoms are split into two or more atoms of smaller nucleus with the release of energy and radiation.

Some of the applications of fission reactions are as a zero-waste energy source for generating large amounts of heat and as the energy source in nuclear weapons.

Learn more about fission reactions at: https://brainly.com/question/3992688

#SPJ4

The Stanley miller apparatus demonstrated , The new data about the composition of the early atmosphere had which of the following effects on origin-of-life hypotheses : A new organic soup hypothesis was proposed to account for the new data for the atmosphere.

The Stanley miller  hypothesis proposed the evolution of life on the earth. from the several theories the acceptance is on soup theory. The organic soup theory proposed the new data for the atmosphere also called as primordial soup theory.

Thus, The Stanley miller apparatus demonstrated , The new data about the composition of the early atmosphere had which of the following effects on origin-of-life hypotheses : A new organic soup hypothesis was proposed to account for the new data for the atmosphere.

To learn more about the Stanley miller here

https://brainly.com/question/28235998

#SPJ4

Stoichiometry is omitted reactant. Reactants are the substances that participate in a chemical reaction. The process by which atoms, the fundamental building blocks of matter.

Rearrange themselves to form new combinations is described by a chemical reaction. Reactants - Reactants are the substances that participate in a chemical reaction. Products - Substances formed as a result of the formation of new bonds in a chemical reaction are referred to as products. As an example: H2 and O2 are reactants in this case because they participate in the chemical reaction. Reactants are the starting materials and appear on the left side of the equation. The products of the reaction are written on the right-hand side of the equation.

To learn more about Reactants, click here.

https://brainly.com/question/17096236

#SPJ4

The statement "Using the spin-spin coupling, one can determine the number of neighbor H's a particular hydrogen atom has" is true.

According to the N+1 rule, a hydrogen atom that appears as a quartet would have three neighboring hydrogen atoms. This rule states that the number of peaks in a hydrogen NMR signal is equal to the number of neighboring hydrogen atoms plus one.

The correct order of increasing energy for the listed light sources used for spectroscopy is as follows:

Radio waves (lowest energy)

Infrared

Visible

Ultraviolet (highest energy)

Spin-spin coupling is a phenomenon observed in nuclear magnetic resonance (NMR) spectroscopy.

It occurs when the magnetic field generated by one nucleus affects the magnetic field experienced by another nearby nucleus, resulting in the splitting of NMR signals into multiple peaks.

By analyzing the splitting pattern, one can determine the number of neighboring hydrogen atoms a particular hydrogen atom has.

Therefore, the statement "Using the spin-spin coupling, one can determine the number of neighbor H's a particular hydrogen atom has" is true.

To know more about spectroscopy, refer here:

https://brainly.com/question/28543039#

#SPJ11

Protein-protein interactions and effector molecule binding at steroid receptors; covalent modification and protein-protein interactions at CREB protein.

A molecule is the term used to describe the aggregate of atoms that results from the formation of covalent bonds. Therefore, we might claim that a monomer is the most basic component of a covalent composite. In nature, oxygen exists as a molecule. Dioxygen is created when two oxygen atoms make a covalent triple bond with one another.

Molecules are created when atoms come together. 2 hydrogen (H) atoms one and oxygen (O) atom make up the three atoms that make up a water molecule. Because of this, water is occasionally abbreviated as H2O. There are billions of hydrogen atoms in an one drop of liquid.

To know more about Molecule visit:

https://brainly.com/question/28238455

#SPJ4

Answer:

2 homogenous mixture

Explanation:

Answer:

the answer is C.Changes can occur to certain physical properties of the substance,

Explanation:

a physical change occurs when the physique of a substances is changes while its composition remain unchanged. for example when the ice melts it is a physical change as the shape of the ice is changing but the properties of both ice and water are same.

Answer:

No

Explanation:

Ionic bonding is where an one atom wants to gain e- while the other wants to lose e-

Such as NaCl.

Answer:

\( \huge{ \boxed{1.213 \: \text{moles}}}\)

Explanation:

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

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

where

From the question

N = 7.30 × 10²³ NaCl molecules

\(n = \frac{7.30 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7.30}{6.02} \\ = 1.2126\)

We have the final answer as

Answer:

A.

Explanation:

Answer:

The work done by the gas expansion is 5875 J,

Since the work done is positive, the work is done by the gas on the surroundings.

Explanation:

Given;

change in internal energy, ΔU = -4750 J

heat transferred to the system, Q = 1125 J

The change in internal energy is given by;

ΔU = Q - W

Where;

W is the work done by the system

The work done by the system is calculated as;

W = Q - ΔU

W =  1125 - (-4750)

W = 1125 + 4750

W = 5875 J

Since the work done is positive, the work is done by the gas on the surroundings (energy flows from the gas to the surroundings).

Therefore, the work done by the gas expansion is 5875 J

A coulomb is a measurement that might be more useful in measuring the movement of an individual charge.

A coulomb is defined as the amount of charge that passes through an electrical conductor transporting one ampere per second.

The SI unit of electric charge is the coulomb. It is derived to SI unit and is corresponded to the symbol C.

Electric current is the flow of electric charge through with an object. The most common charge bearers are the positively charged proton and the negatively charged electron.

Thus, A coulomb is a measurement that might be more useful in measuring the movement of an individual charge.

To learn more about the coulomb, follow the link;

https://brainly.com/question/12498766

#SPJ1

The pH at the equivalence point will be 7. To find the pH at the equivalence point of the titration, we need to determine the moles of HCl and NaOH and then calculate the concentration of the resulting salt solution.

First, let's calculate the moles of HCl:

Moles of HCl = volume (in L) × molarity

           = 0.050 L × 0.100 mol/L

           = 0.005 mol

Since the stoichiometric ratio between HCl and NaOH is 1:1, the moles of NaOH used will also be 0.005 mol.

At the equivalence point, all the HCl is neutralized by the NaOH. Therefore, we have a solution of NaCl.

The volume of the resulting solution will be the sum of the initial volumes of HCl and NaOH:

Volume of resulting solution = Volume of HCl + Volume of NaOH

                           = 0.050 L + 0.050 L

                           = 0.100 L

To find the concentration of the resulting NaCl solution, we divide the moles of NaCl by the volume:

Concentration of NaCl = moles of NaCl / volume of NaCl solution

                    = 0.005 mol / 0.100 L

                    = 0.050 mol/L

NaCl is a salt of a strong acid (HCl) and a strong base (NaOH). It completely dissociates in water, resulting in a neutral solution. Therefore, the pH at the equivalence point will be 7.

To know more about pH visit-

brainly.com/question/28580519

#SPJ11

Answer:

50 g

Explanation:

Please brainiest

Sodium chloride is white, crystalline solid at room temperature.

It is a compound whose components atoms are sodium and chlorine.

The atoms of the two elements combine chemically through an ionic bond. The sodium donates it valence electron to the chlorine atom.

Thus, sodium chloride is an ionic compound. It has a characteristic white appearance and crystalline structure.

The compound is a solid at room temperature. It has a melting point of 801 °C.

More on sodium chloride can be found here: https://brainly.com/question/9811771

#SPJ1

A piece of evidence obtained from  crime scenes that  might have either class or individual characteristics is called a class evidence. One of the example for class evidence is blood type. Thus, option d is correct.

Class evidences are characteristics of physical evidence that can only ever be connected to a collection of sources rather than a single one. Evidence that is found to have class characteristics may be used to narrow the pool of possibilities, but it cannot be tied specifically to one person or source.

Class evidences  can show that only a small group of persons possessed all the traits linked to criminal activity proof. Individual evidence, on the other hand, consists of items that are connected to a specific individual.

Examples of class evidence include fires, paint, and blood type. Therefore, option d is correct.

Find more on class evidences:

https://brainly.com/question/14263276

#SPJ6

Answer:

it's hydrogen

Explanation:

ig it's correct

Answer:

please mark as brainliest

Explanation:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons . The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.

example:chlorine is an example of an isotope it has a proton number of 17 and a mass number of 35 in some cases they have a proton number of 17 and a mass number of 37 there is difference in the number of neutron to calculate this we do it this way.for the first one

mass number=proton+neutron

neutron=mass number-proton

neutron=35-17

neutron=18

for the second one

neutron=37-17

neutron=20

Answer:

Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite

Explanation:

Answer:

Hello Adam Here!!!

Explanation:

A chemical compound has the following characteristics: (i) A chemical compound is obtained by the chemical combination of two or more elements in a definite proportion by mass. (ii) Compounds are homogeneous, i.e. their properties are the same throughout.

Happy to Help! =)

Answer:

I think its b, but ik not completely sure.

Answer:

I think the second one...

Each solution has a concentration of 7.625 x 103 m, 3.8125 x 104 m, and 1.90625 x 105 m, respectively.

Dilution is the process of lowering a sample's concentration by incorporating more solvent, according to its definition. The following is the dilution formula.

C₁V₁ = C₂V₂

where C1 is the sample's initial concentration.

V1 is the initial sample volume.

After dilution, the ultimate concentration is C2.

After dilution, the ultimate total volume is V2.

Calculate the concentration of the diluted solution by entering the numbers into the formula.

first common answer

C₁V₁ = C₂V₂

0. 1525 m(5.00 ml) = C₂(100.0 ml) (100.0 ml)

C₂ = 7.625 x 10⁻³ m

Second common solution

C₁V₁ = C₂V₂

7.625 x 10⁻³ m(5.00 ml) = C₂ (100.0 ml)

C₂ = 3.8125 x 10⁻⁴ m

Third accepted option

C₁V₁ = C₂V₂

3.8125 x 10⁻⁴ m(5.00 ml) = C₂(100.0 ml) (100.0 ml)

C₂ = 1.90625 x 10⁻⁵ m

To learn more about dilution Visit:

brainly.com/question/1615979

#SPJ4

Answer: C is the answer

Answer:

0.1169g .

Explanation:

1. Multiply the concentration (0.5 mols/Liters) by the volume of solution you want (0.5 Liters) to find the moles of NaCl you need. 2. Multiply the moles of NaCl by its molar mass (58.44 g/mol) to find the grams of solute needed.

The mass of the hexane sample is 0.580 g. The mass of the bomb calorimeter is 1.900 kg, and its specific heat is 3.21 J/g·K. The change in temperature is 4.542 K. So, heat produced during the combustion of hexane is 11195.1576 J.


To calculate the amount of heat produced during the combustion of hexane, we can use the formula q = m × C × ΔT.

First, we need to determine the mass of the hexane sample, which is given as 0.580 g.

Next, we need to find the mass of the bomb calorimeter, which is given as 1.900 kg.

Note that we need to convert the mass to grams by multiplying it by 1000, so the mass is 1900 g.

The specific heat of the bomb calorimeter is given as 3.21 J/g·K.

Finally, we have the change in temperature, which is given as 4.542 K.

Now, we can substitute these values into the formula: q = (0.580 g + 1900 g) × 3.21 J/g·K × 4.542 K.

Simplifying the equation, we get:
q = 2467.8 J/g·K × 4.542 K

Calculating the product:
q = 11195.1576 J

To know more about combustion refer to this:

https://brainly.com/question/31123826

#SPJ11

Explanation:

Correct option is

D

3

The unbalanced chemical reaction is Al(s)+O

2

(g)→Al

2

O

3

(s)

Balance Al atoms by adding 2 to Al on LHS

2Al(s)+O

2

(g)→Al

2

O

3

(s)

Balance O atoms by adding

2

3

to O

2

on LHS

2Al(s)+

2

3

O

2

(g)→Al

2

O

3

(s)

Multiply the whole equation with 2.

4Al(s)+3O

2

(g)→2Al

2

O

3

(s)

This is the balanced chemical equation. The coefficient of O

2

is 3.

Answer:

The chemistry will need 2*10⁶ moles of antimony trifluoride.

Explanation:

The balanced reaction is:

3 CCl₄ (g) + 2 SbF₃ (s) → 3 CCl₂F₂(g) + 2 SbCl₃ (s)

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

You can apply the following rule of three: if by reaction stoichiometry 3 moles of freon are produced by 2 moles of antimony trifluoride, 3*10⁶ moles of Freon are produced from how many moles of antimony trifluoride?

\(moles of antimony trifluoride=\frac{3*10^{6} moles of freon*2 moles of antimony trifluoride}{3 moles of freon}\)

moles of antimony trifluoride= 2*10⁶

The chemistry will need 2*10⁶ moles of antimony trifluoride.