What is the molarity concentration of cucl2 in a solution prepared by dissolving 33. 6g of cucl2 in enough water to make 500. ml of solution?

Answer:

The answer is offspring

Explanation:

Answer:

Na and Cl

Explanation:

An ionic compound is solid at state room temperature. Therefore Na and Cl would be the correct answer :)

Answer:

no

Explanation:

Answer:

The texture of a rock is a result of its mineral composition

Most rocks contain more than one type of sediment

Explanation:

Answer:

see explanations

Explanation:

1. pH = -log [H+]

so [H+] = 10^(-pH) = 10^(-3.57) = 2.7 x 10^(-4) M

2. neutralize implies mol acid = mol base

so [HNO3] = (1 M) * (0.080 L) / (0.250 L) = 0.32 M HNO3

3. mol HNO3 = molarity of HNO3 * volume of HNO3

= 0.32 M HNO3 * 0.250 L HNO3 = 0.080 mol HNO3

Answer:

the both circuit are in a complete circle. the difference are the parallel circuit can evenly spread electrons between two object for example lightbulb where in a series circuit the object closer to the power source will always get more electrons and the object behind get less.

Explanation:

for any circuit to work it need to be complete and requires to connect like the circle or the flow of electron will be broken and and it will not flow anymore. due to electrons wanting to seek out the fastest way to complete the loop so because in a parallel circuit there are two circles so when the electrons goes their a part of the electron split and travel that way to seek the closes way back therefor a parallel circuit can evenly deliver electrons to two object. in series the object closest to the power source gets the most electrons because there is only one way and the electron must pass through one object before it can pass through the one behind it making it slower and has less charge.

electron = current ,if you didn't know yet

Answer:

Electronegativity decrease in group from top to bottom

Explanation:

If a flexible hot air balloon has a volume of 350,000 L of air at 40 degrees C and 1 atm, 13636 moles of air are in the balloon . This is taken out by ideal gas law.

The ideal gas law, also known as the general gas equation, is the state equation for a hypothetical ideal gas. Although it has several limitations, it is a good approximation of the behavior of many gases under many conditions. Benoît Paul Émile Clapeyron proposed it in 1834 as a combination of empirical Boyle's law, Charles' law, Avogadro's law, and Gay Lussac's law.

using the equation P × V= n × R × T

P = Pressure = 1 atm

V = Volume = 350000 L

n = moles

R = 0.082 L.atm.K⁻¹.mol⁻¹

solving for n ,

moles n =   13636 moles

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The element which larger species in each pair are Sr ,N3-, Ni, S2-.

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

A substance made up of only one kind of atom, all of which have the same number of protons, is said to be an element. One famous illustration is pure gold. A ring constructed of pure gold would be composed of countless millions of atoms, each with the same atomic number and 79 protons in its nucleus.

The three categories of elements are metal, non-metal, and metalloid. Metals like sodium, calcium, caesium, and other elements on the extreme left of the periodic table are examples of this.

Thus, The element which larger species in each pair are Sr ,N3-, Ni, S2-.

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As you can see, NH₂OH structure only has simple bonds.

Answer: letter 'c', no double bounds.

Answer:

goggles

Explanation:

...................

Answer:

no. of carbon atoms = 1.806 × 10²³

Explanation:

The question asks us to find the number of atoms in 3.9 g of benzene.

To do this we must know that the chemical formula of benzene is C₆H₆.

Therefore, the molecular mass of benzene is:

R.M.M = (12 × 6) + (1 × 6)

          = 72 + 6

          = 78

Now that we know the molecular mass of benzene, we have to find the number of moles of benzene in 3.9 g of benzene:

no. of moles = \(\mathrm{\frac{mass}{R.M.M}}\)

                     = \(\frac{3.9}{78}\)

                     = 0.05 mol

From the number of moles, we can find the number of molecules of benzene using the formula:

\(\boxed{\mathrm{no. \ of \ molecules = no. \ of \ moles \times Avogadro's \ number}}\)

where Avogadro's number = 6.02 × 10²³

Therefore,

no. of molecules of benzene = 0.05 × 6.02 × 10²³

                                                = 3.01 × 10²²

Since each molecule of benzene contains 6 atoms of carbon, we have to multiply the number of benzene molecules by 6:
no. of carbon atoms = 3.01 × 10²²  ×  6

                                  = 1.806 × 10²³

Therefore, there are 1.806 × 10²³ atoms of carbon in 3.9 g of benzene.

The balance chemical reaction is as below:

4Fe (s) + 3O₂ (g) ⇒ 2Fe₂O₃ (s)

The term balanced chemical equation is defined when the number of the atoms involved in the reactants side is exactly equal to the number of atoms in the products side.

The most important thing about balancing chemical equations is to satisfy the law of conservation of mass, This states that  “the total mass of the products is exactly equal to the total mass of all the reactants”

Thus, The balance chemical reaction is as below:

4Fe (s) + 3O₂ (g) ⇒ 2Fe₂O₃ (s)

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you should

MOL × NA(Avogadro Constant)

Mol = 4

HNO3 = 5 Atome ( 1H + 1N + 3O)

NA = 6.02 × 10* ( * = 23)

\(4 \times 5 \times 6.02 \times {10}^{23} = 20 \times 6.02 \times {10}^{23} = 120.4 \times {10}^{23}atom \)

Answer:

2.408 x 10^24

GREETINGS!

One mole of a substance is equal to 6.02 × 10²³ units of that substance. The number 6.022 × 10²³ is known as Avogadro's number.

so if one mole of molecule is equal to that number so,

                              for 4 moles of \(HNO_{3}\)= 4 x (\(6.02x10^{23}\))

so answer is,

                      2.408 x 10^24

HOPE IT HELPS YOU.

Answer:

salad is a mixture this is the answer of the question

please mark ne has a brainliest

Answer:

I solved the questions then counted how many significant figures in each answer

eg,

0.042m+1.33m =1.372m

1.372 has 4 significant figures

that's how you do others

Explanation:

6. 1.372m = 4 significant figures

7. 4.345g = 4 significant figures

8. 12L = 2 significant figures

9. 27.3cm = 3 significant figures

10. 0.975 = 3 significant figures

8.357×10²³ moles of aspirin is present

So, aspirin, C₉H₈O₄, has a molar mass of 180.157 g mol⁻¹. This means that one mole of aspirin will have a mass of 180.157 g

Therefore, 250 g of aspirin will be equal to

250 g × 1-mole aspirin/180.157 g = 1.38767 moles aspirin

We know, 1 mole = 6.023×10²³molecules is Avogadros number

Now, 1.38767 moles × 6.023×10²³/ 1 mole = 8.357×10²³molecules

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Atoms of different elements have unique spectral lines because each element has a unique set of electron orbits. The correct option is C.

Spectral lines are dark or bright lines in the spectrum of an object created by absorption or emission of light of a specific wavelength. Spectral lines are generated when electrons in atoms are excited and move from one energy level to another.

When they return to their original energy level, the energy that was absorbed is released in the form of light. Spectral lines are used by astronomers to examine the composition of stars, galaxies, and other astronomical objects.

Atoms of different elements have unique spectral lines because each element has a unique set of electron orbits. Electrons orbit the nucleus in specific energy levels, and the wavelength of light that is absorbed or emitted when an electron moves from one energy level to another is determined by the element's unique electron configuration.

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Answer:

Explanation:

4

If the frog cells swell and burst while the human cells shrink means that the solution will be hypotonic for frog cells while for human cells the solution will be hypertonic.

These changes will occur because in the frog cell there will be higher concentrations of ions than in the extracellular space, so water will enter the cell by osmosis to equalize the concentrations of the cells. While in the human cell there will be a lower concentration of ions than outside the cell, for this reason the water leaves it in order to equalize the concentrations both inside and outside the cell. Being then the hypotonic solution for the frog cell and hypertonic for the human cell.

Therefore, we can confirm that if the frog cells swell and burst while the human cells shrink means that the solution will be hypotonic for frog cells while for human cells the solution will be hypertonic.

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Answer:

the freezing point of the 5.6 molal solution of ethylene glycol in ethanol is -125.744 °C

Explanation:

To calculate the freezing point depression of a solution, we can use the formula:

ΔTf = Kf * molality

where:

ΔTf is the freezing point depression

Kf is the freezing point depression constant for the solvent (in this case, ethanol)

molality is the number of moles of solute per kilogram of solvent.

The freezing point depression constant for ethanol is 1.99 °C/m.

We are given that the solution is 5.6 molal, which means there are 5.6 moles of ethylene glycol per kilogram of ethanol.

So, we can calculate the freezing point depression as:

ΔTf = 1.99 °C/m * 5.6 mol/kg = 11.144 °C

The freezing point depression is 11.144 °C.

To find the freezing point of the solution, we can subtract this value from the freezing point of pure ethanol, which is -114.6 °C.

Freezing point of solution = -114.6 °C - 11.144 °C = -125.744 °C

Therefore, the freezing point of the 5.6 molal solution of ethylene glycol in ethanol is -125.744 °C.

The correct answer is D. Higher sample capacity is not an advantage of open tubular (column) GC over packed (column) GC.

Open tubular (column) GC has several advantages over packed (column) GC, including higher resolution, shorter analysis time, and increased sensitivity. These advantages stem from the fact that open tubular columns have a smaller internal diameter, resulting in a larger surface area for interaction between the analyte and the stationary phase, and faster separation times.

However, higher sample capacity is not an advantage of open tubular (column) GC over packed (column) GC. Packed columns can handle larger sample sizes, making them more suitable for certain applications where a higher sample throughput is required. Therefore, the correct answer is D, "higher sample capacity is not an advantage of open tubular GC over packed column GC."

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Answer:

CsCl

Explanation:

The ionic species are:

            Cs⁺   and Cl⁻

The two ions will combine to form an ionic compound which results from the electrostatic attraction between oppositely charged ions.

Elements or ions exchange directly their combining powers or their simplest whole number ratio during the formation of chemical formulae of compounds

                                Cs⁺   and Cl⁻

Combining power      1             1  

Exchange of

valencies                     1             1

      Compound CsCl

Taking into account the room temperature and pressure, there are 0.4167 moles in 10 dm³ of sulfur dioxide gas.

RTP refers to Room Temperature and Pressure. Pressure is 1 atm and Temperature is 298K. In this case, one mole of any gas has a volume of 24 dm³ or 24,000 cm³. This volume is called the molar volume of a gas.

In other words, the molar volume (the amount of space occupied by one mole) of any gas is 24dm³ (1 mol of gas molecules occupies 24.0 dm³).

Therefore, the amount of volume occupied by any gas can be calculated by multiplying the number of moles of gas by 24dm³:

Volume = Moles of gas× 24 dm³

So, the number of moles can be calculated as:

Moles of gas= Volume÷ 24 dm³

In this case, you know that volume if sulfur dioxide gas is 10 dm³. So, replacing:

Moles of gas= 10 dm³ ÷ 24 dm³

Solving:

Moles of gas= 0.4167

Finally, there are 0.4167 moles in 10 dm³ of sulfur dioxide gas.

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Answer: Area of a Triangle Equals Base x Height / 3

Explanation: Hope this works

Answer:

Explanation:

When a flask is dipped in very hot water in a large beaker , the flask expands due to heat gain . As a result , level of water in tube fitted in flask goes down .

After some time , the water inside tube also become hot so it expands  . coefficient of volume expansion of water is more than coefficient of volume expansion of glass . Hence greater expansion takes place in the volume of water . It is due to this fact that water level in tube starts rising after some time of fall .

When the heavy isotopes of hydrogen undergo fusion at extremely high temperatures, they release a tremendous amount of energy.This process is known as nuclear fusion.

Nuclear fusion occurs when two light atomic nuclei combine to form a heavier nucleus. In the case of heavy hydrogen isotopes, deuterium (D) and tritium (T), the fusion reaction can be represented as follows:

D + T -> He + n + Energy

In this reaction, deuterium and tritium nuclei fuse together to form a helium nucleus (He) along with the release of a neutron (n) and a tremendous amount of energy.

The high temperatures required for nuclear fusion are necessary to overcome the strong electrostatic repulsion between positively charged atomic nuclei. By providing enough thermal energy, the kinetic motion of the nuclei allows them to approach closely enough for the strong nuclear force to take effect and bind them together.

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Answer:

Therefore, 1.00 mole of the gas is present in the container.

Explanation:

The following data were obtained from the question:

Volume (V) = 22.41L

Temperature (T) = 273K

Pressure (P) = 101.325 kPa

Gas constant (R) = 8.31 L.kPa/mol.K.

Number of mole (n) =...?

The number of mole of the gas in the container can obtained by applying the ideal gas equation as illustrated below:

PV = nRT

Divide both side by RT

n = PV /RT

n =101.325  x 22.41 / 8.31 x 273

n = 1.00 mole.

Therefore, 1.00 mole of the gas is present in the container.

Answer:

1 mole of gas is contained in 22.41 liters at 101.325 kPa and 0ᴼC

Explanation:

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas.

In this case:

Replacing:

1 atm*22.41 L=n* 0.082 \(\frac{atm*L}{mol*K}\)*273 K

Solving:

\(n=\frac{1 atm*22.41 L}{0.082\frac{atm*L}{mol*K} *273 K}\)

n=1  mole

1 mole of gas is contained in 22.41 liters at 101.325 kPa and 0ᴼC