8. Suppose each of these isotopes emits an alpha particle. Give the isotope name and symbol for the
isotope that is produced. Place a checkmark next to the isotopes produced that are stable. (Consult the
isotope graph on page 66 of Lesson 14: Isotopia.) isotope chart from Lesson 14.
Isotope
After alpha emission
a) platinum-175
b) gadolinium-149
c) americium-241
d) thorium-232

Answer:

Desertification?

Explanation:

Desertification is when fertile lands become desert like

The answer is B hydro sphere

Answer:

Explanation:

To find the number of moles 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

N = 2.8 × 10²⁴ atoms of Cl2

So we have

\(n = \frac{2.8 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 4.65116279069...\)

We have the final answer as

Hope this helps you

The height of a column of water when the applied pressure on the other arm of a J tube sealed at one end is 2665.1 hPa is approximately 2.72 meters.

To calculate the height of the column of water, we use the following formula:

h = (P - Patm)/(ρg)

where h is the height of the column of water, P is the applied pressure, Patm is the atmospheric pressure, ρ is the density of water, and g is the acceleration due to gravity.

First, we need to convert the given pressure of 2665.1 hPa to Pascals (Pa):

2665.1 hPa × 100 Pa/hPa = 266,510 Pa

We can assume that the atmospheric pressure at sea level is approximately 101,325 Pa. Substituting the values into the formula, we get:

h = (266,510 - 101,325)/(0.998 g/cm³ × 9.80665 m/s²) ≈ 2.72 meters

Therefore, the height of the column of water in the J tube is approximately 2.72 meters.

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To shed light on the process by which titanium dioxide (TiO2) nanoparticles are formed, titanium tetrachloride (TiCl4) hydrolysis has been investigated.

Hydrogen chloride (HCl) gas, which is extremely caustic and hazardous, is known to be released violently when TiCl4 reacts with water. The estimate of the scope and gravity of the effects of large accidents that have been identified, such as an unintentional spill of TiCl4, is, however, not shared by the industry.

An alternative strategy (which is the opposite of the solution above) would be to assert that since metal chlorides are often ionic, titanium chloride must be a tiny (covalent) molecule with weak molecular interactions if it is a liquid at room temperature.

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Answer:

0.3651 moles

Explanation:

We know that the smaller mass of sugar c 12 aged 22011 is 342.3 grams per mole and the number of moles will be minus 125 grams, divided by molar mass 342.3 grams per mole, and this will be 0.3651 moles.

The concentration of NH3 at equillibirium is 0.00010M. Option A.

Ammonium nitrate is formed when nitric acid reacts with ammonia. It is a white crystalline solid consisting of ammonium ions and nitrate ions. Soluble in water, but does not form hydrates. Ammonia is directly neutralized with sulfuric acid to produce ammonium sulfate.

The neutralization evaporator and crystallizer are connected so that the heat released during neutralization is used to evaporate the water in the ammonium sulfate slurry. These units operate under partial vacuum. Nitric acid pH neutralization is common and any inorganic base such as sodium hydroxide or lime can be used. Ammonia gas reacts with hydrogen chloride gas to form ammonium chloride.

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The number of hamburgers sold on Wednesday is 275.

Let's assume the number of hamburgers sold is x.

According to the given information, the number of cheeseburgers sold is 70 more than the number of hamburgers. So, the number of cheeseburgers sold can be expressed as x + 70.

The total number of hamburgers and cheeseburgers sold is given as 620, so we can set up the following equation:

x + (x + 70) = 620

Combining like terms, we get:

2x + 70 = 620

Subtracting 70 from both sides of the equation:

2x = 550

Dividing both sides by 2:

x = 275

Therefore, the number of hamburgers sold on Wednesday is 275.

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A. Absorption. Both processes are relatod to the way drugs are absorbed into the system.

Answer:

iiiiii<iiiiii

Explanation:

Answer:

4/J

Explanation:

Remember the triangle

m

v d

d=m/v

do this for the 4 questions.

1.7.36

2.10.5

3.1,846

4.2.71

so it would be 4

good luck!!!!

Answer:

Yes it does because the atoms/molecules are moving faster than they are in a cold substance.

Explanation:

Answer:

8 meters per second per second

Explanation:

Newton's second law: \(f=ma\), force = mass multiplied by acceleration.

Therefore 56 / 7 = acceleration = 8

Expressing the answer in exponential form we get 3⁴.

To simplify the expression (3⁷/(3³), we can apply the properties of exponents. When dividing two exponential expressions with the same base, we subtract the exponents.

In this case, we have 3⁷ divided by 3³, which can be simplified as:

3⁽⁷⁻³⁾

3⁴

Therefore, the simplified expression is 3⁴.

To understand why we subtract the exponents when dividing, we can break down the steps.

The expression 3⁷ represents 3 multiplied by itself seven times:

3 × 3 × 3 × 3 × 3 × 3 × 3.

The expression 3³ represents 3 multiplied by itself three times:

3 × 3 × 3.

When dividing these two expressions, we can cancel out common factors by subtracting the exponents:

(3 × 3 × 3 × 3 × 3 × 3 × 3) / (3 × 3 × 3)

This simplifies to:

3 × 3 × 3 × 3

Which is equivalent to 3⁴.

Thus, the answer in exponential form is 3⁴

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Answer:

D. 45.0 g

Explanation:

In present reaction, 1 mol of N2 react with 3 moles of H2 to generate 2 moles of NH3

Thus, 2 moles of NH3 ≡ 3 moles  of H2

Therefore, 15 moles of NH3 ≡ (3×15)/2 = 22.5 moles of H2.

We know that, 1 mole of H2 ≡ 2 g

Therefore, 22.5 moles of H2 ≡ 2 × 22.5 = 45 g

Thus, 45 g of hydrogen are needed to produce 15.0 mol of ammonia, if the reaction goes to completion

Metal ion indicators are compounds that change color when they bind to a metal ion. They are commonly used in EDTA (ethylene diamine tetraacetic acid) titrations, where EDTA acts as a chelating agent, binding to the metal ion to form a stable complex.

One important characteristic of a useful metal ion indicator is that it must bind the metal ion less strongly than EDTA does. This is because EDTA is typically added in excess to ensure complete complexation of the metal ion, and a strong metal ion indicator would compete with EDTA for the metal ion and interfere with the accuracy of the titration.

Metal ion indicators are not necessarily also acid-base indicators, but some can be both. In EDTA titrations, pH plays an important role in determining the stability of the metal-EDTA complex, so an indicator that can monitor pH changes as well as metal ion binding can be useful.

In summary, metal ion indicators are compounds that change color when they bind to a metal ion, and useful indicators must bind the metal ion less strongly than EDTA does.

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Answer:

C. Sodium Chloride.

Explanation:

Because when NaCl dissolved in water, it will dissociate to produce 2 ions Na+ and Cl-.

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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The pressure of the gas in the bulb, given that height in the right arm is 100 mm and the left arm is 120 mm, is 740 mmHg (Option C)

From the question given above, the following data were obtained:

The pressure of the gas in the bulb can be obtained as shown below:

Pressure of gas = Atmospheric presure - Pressure due to difference in height

Pressure of gas = 760 - 20

Pressure of gas = 740 mmHg

Thus, we can conclude from the calculation made above that the pressure of the gas is 740 mmHg (Option C)

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In the energy transfer diagram shown, 100 kJ of chemical energy enters the system.

Part of it is used to run a motor, and a part of it is lost as other forms of energy. The total energy of the system remains constant, but it is distributed differently.

The law of conservation of energy states that energy cannot be created or destroyed, but it can be converted from one form to another. In this case, the chemical energy is converted into mechanical energy (used to run the motor) and heat energy (lost as other forms of energy). The total energy of the system is 100 kJ, but it is distributed differently between the mechanical energy and the heat energy.

The efficiency of a system is the ratio of the useful energy output to the total energy input. In this case, the efficiency of the system is the ratio of the mechanical energy output to the chemical energy input. The efficiency of the system can be improved by reducing the amount of energy that is lost as heat.

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When comparing spectra from neutral atoms and ionized atoms of the same element, there are significant differences.

The spectrum from a neutral atom shows distinct lines corresponding to the energy levels of the electrons in the atom. On the other hand, the spectrum from an ionized atom shows fewer lines and a more continuous spectrum due to the absence of some of the electrons that would have contributed to the lines in the neutral atom's spectrum.

Additionally, the lines in the ionized atom's spectrum are shifted to higher energy levels due to the loss of electrons and subsequent increase in ionization energy. Overall, comparing the spectra of neutral and ionized atoms can provide valuable information about the atomic structure and properties of the element.

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The mass of  C8H18 is 4.788g

In chemistry,

The number of moles of a compound is given as Mass/ Molar mass

For C8H18, The molar mass will be calculated as

C8H18=12 x 8 +1 x 18=96+18=114 g/mol

Putting the value in the equation

Number of moles= Mass/Molar mass

0.042moles =Mass/ 114g/mol

Mass=0.042 x 114=4.788g

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The correct answer is D. The given initial amounts of X and Y will not result in the formation of solid XY.

The reaction indicates that the solid XY decomposes into gaseous X and Y. The given equilibrium constant, Kp, is 4.1 at 0 °C. This constant represents the ratio of the partial pressures of the products (X and Y gases) to the partial pressure of the reactant (XY solid) at equilibrium.

To determine if the reaction will proceed towards the formation of solid XY, we need to compare the calculated value of Kp with the given value of 4.1. In this case, the calculated value of Kp will depend on the concentrations of X and Y.

In the given answer choices, the initial amounts of X and Y are as follows:

To calculate the value of Kp, we need to determine the partial pressures of X and Y, which depend on their concentrations and the volume of the container (22.4 L). Since the initial amounts of X and Y are not provided in terms of concentration or volume, we cannot accurately calculate Kp for any of the given answer choices.

Hence, the correct answer is D: none of the above, as the question does not provide enough information to determine the initial amounts of X and Y that would result in the formation of solid XY.

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Answer:

B and D

Explanation:

Answer:

The first one has 5 valence electrons, and the second has 7. (This can be counted by counting the amount of black dots on the biggest circle). Since 7 > 5, it would be easier for the second one to gain one (so that it completes it's valence shell) so the answer is the second one.

Answer:

the answer is c or a am I right☺

if 3.45 grams of magnesium are burned, 1.725 grams of magnesium oxide are produced. The chemical equation for the reaction of magnesium with oxygen is 2MgO.

Magnesium is a chemical element that is highly reactive, meaning that it easily reacts with other substances. When magnesium is burned in the presence of oxygen, it reacts with the oxygen to form magnesium oxide,

The chemical equation for the reaction of magnesium with oxygen is:

2Mg + O2 -> 2MgO

This equation tells us that for every 2 grams of magnesium that react with oxygen, 2 grams of magnesium oxide are produced. Therefore, if 3.45 grams of magnesium are burned, the number of grams of magnesium oxide produced can be calculated as:

3.45 grams Mg / 2 grams Mg/1 gram MgO = 1.725 grams MgO

Therefore, if 3.45 grams of magnesium are burned, 1.725 grams of magnesium oxide are produced.

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A potassium atom's ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.

An atom's electron configuration is a picture of how electrons are arranged in relation to orbital shells and subshells. Consequently, this is potassium's electron configuration.

Making Electron Configurations in Writing. Write the energy level (the period) first, then the subshell that needs to be filled, and finally the superscript, which indicates how many electrons are in that subshell. The atomic number, Z, is the sum of all the electrons.

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Answer:

Two molecular properties that could be used to separate a substance from a mixture are - Filtration and Chromatography .

Explanation

Molecular property -Molecular properties include the chemical properties, physical properties, and structural properties of molecules, including medicines. Typically, molecular properties do not include a chemical compound's pharmacological or biological properties.

Usually, filtration is an imperfect operation. On the feed side of the filter or embedded in the filter media, some fluid remains and some tiny solid particles make their way through the filter.

example - Filters containing fibers that trap particulates are used by many aquariums.

Chromatography can be analytical or preparatory. Preparative chromatography is intended to isolate the components of a mixture for subsequent use and is therefore a method of purification. Analytical chromatography is usually conducted with smaller quantities of material and is intended to assess the presence of analytes in a mixture or to measure their relative proportions. Both are not limited to each other.

An example of chromatography is when a chemical reaction is used to separate each of the various sized molecules on a piece of paper in a liquid compound into their own pieces.

Hence , the answer is filtration and chromatography .