A0.205g sample of caco3(mr=100.1g/mol) is added to a flask a long with7.50 mlof2.00mhcl. caco3(aq)+2hcl(aq)→ cacl2(aq)+h2o(l)+co2(g) enough water is then added to make a 125.0ml solution. a10.00ml aliquot of this solution is taken and titrated with 0.058m naoh. naoh(aq)+hcl(aq)→ h2o(l)+nacl(aq) how many ml of naoh are used?​

The reaction between pottasium metal and chlorine gas is a combination reaction and it is as follows;

2K + Cl₂ → 2KCl

A chemical reaction is a process involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

A chemical reaction is said to be a combination reaction when two or more atoms are joined together to form a compound. An example is the reaction of pottasium metal and chlorine gas to produce pottasium chloride as follows:

2K + Cl₂ → 2KCl

In the above equation, two elements; pottasium chemically combines with chlorine to form a compound; pottasium chloride.

Learn more about combination reaction at: https://brainly.com/question/32027270

#SPJ1

Answer:

8.005204 gm

Explanation:

From periodic chart ,  

    mass of one mole of Helium atoms = 4.002602 gm/mole

        two moles is twice this weight

One mole of any ideal gas at STP occupies 22.4 L of volume.


Standard temperature and pressure (STP) is defined as a temperature of 273.15 K (0 °C, 32 °F) and a pressure of exactly 100 kPa (1 bar).The volume of one mole of an ideal gas at STP can be found using Avogadro's Law, which states that equal volumes of gases at the same temperature and pressure contain the same number of molecules or moles.  

The volume of 1 mole of any ideal gas at STP is equal to 22.4 L, according to Avogadro's Law. This volume is also known as the molar volume of a gas at STP, and it applies to all gases regardless of their chemical properties.  

The formula to find the volume of any number of moles of a gas at STP is:

Volume = (number of moles) x (molar volume at STP)  

Therefore, if we have 2 moles of an ideal gas at STP, then the volume occupied by this gas is given by:

Volume = 2 moles x 22.4 L/mole = 44.8 L

This is how we can calculate the volume of any ideal gas at STP.

Learn more about Avogadro's Law here:

https://brainly.com/question/4133756

#SPJ11

Answer:

T = 561.3K

Explanation:

The translational kinetic energy of a gas such as nitrogen is obtained using the formula:

K = 3/2 * n * R * T

Where n  are moles of gases (1mole of N₂), R is gas constant (8.314J/molK)and T is absolute temperature (in K)

If the translational energy of the gas is 7.0x10³J:

7.0x10³J = 3/2 * 1 mole * 8.314J/molK * T

The person or device that receives the wave or information (the term has to start with ob) is an "observer," as an observer is someone or something that is able to detect and take note of the information or waves that are being transmitted or propagated.

The role of an observer is important in many fields, such as science, engineering, and communication. In science, an observer is critical to conducting experiments and making observations that can help further our understanding of the natural world. In engineering, an observer might be used to detect and analyze vibrations or other physical phenomena that could be important for maintaining the safety and reliability of structures or machines (devices).

Learn more about the wave here.

https://brainly.com/question/13028933

#SPJ1

The correct options based on the information will be:

Enhanced boiling points can be attributed to heightened intermolecular forces since more energy is demanded to break the bonds between molecules in a liquid state and transform them into a gaseous phase.

The presence of strong intermolecular force characterizes Bromine. Fluorine, on the other hand, serves as a gas when under standard temperature and pressure conditions because it experiences weak intermolecular forces consequent to its nonpolar nature and limited size.

Due to the involvement of polarizable electrons and larger proportions, Bromine remains in its liquid state while kept at standard temperature and pressure, attesting thereby to a stronger intermolecular bond compared with Fluorine's relatively weaker bonding property.

Learn more about bond on

https://brainly.com/question/25965295

#SPJ1

The ground-state electron configurations of oxygen, sulfur, and selenium are 2-8-8, 2-8-6, and 2-8-8-6 respectively. Oxygen and selenium both have 8 electrons in their outermost shell, while sulfur has 6.

This difference affects the chemical and physical properties of these elements, as elements with more electrons in their outermost shells tend to be more reactive due to increased electron availability for bonding.

As oxygen and selenium have the same number of electrons in their outermost shell, they have similar chemical and physical properties. Sulfur, with its fewer outer shell electrons, has different chemical and physical properties than oxygen and selenium.

For more question on selenium click on

https://brainly.com/question/30094538

#SPJ11

Answer:

The answer is B: assesses how many alien civilizations Earth could contact. the exact interpretation is how many alien societies exist and are detectable!

Explanation:

The main culprit for global warming appears to be greenhouse gas emissions, particularly carbon dioxide (\(CO_{2}\)) released from human activities such as burning fossil fuels, deforestation, and industrial processes.

Global warming refers to the long-term increase in Earth's average surface temperature due to human activities that release greenhouse gases into the atmosphere, trapping heat and resulting in an enhanced greenhouse effect. These greenhouse gases trap heat in the Earth's atmosphere, causing the planet's temperature to rise and leading to various negative impacts on ecosystems and human societies. Reducing greenhouse gas emissions is considered a critical strategy for addressing global warming and mitigating its impacts on the environment and human societies.

To know more about Global Warming:

https://brainly.com/question/3553382

#SPJ11

Answer:

your answer is C

Explanation:

The electron-dot structure of NH3 places one set of nonbonding electrons in the valence shell of the nitrogen atom. that means there are three bonded atoms and one single pair for a coordination number of four surrounding  the nitrogen, the same occurs in water to. along with the Lewis dot structure for ammonia, NH3. the non bonding atoms are basically like hydrogen atoms the try to refuse to bond and they can't be fused unless the right conditions are met.

If a bone is determined to have an activity of 3.80 cpm per gram of carbon, then the bone is 11,500 years old.

Carbon-14 has a half-life of 5730 years. The initial activity of a living organism is 15.2 counts per minute (cpm) per gram of carbon. In the case of the bone, the activity is 3.80 cpm per gram of carbon. To determine the age of the bone, we can use the formula:

N = N0 * (1/2)^(t / T)

where N is the current activity, N0 is the initial activity, t is the time in years, and T is the half-life of Carbon-14.

Rearrange the formula to solve for t:

t = T * log2(N0 / N)

Plug in the values:

t = 5730 * log2(15.2 / 3.8)

t ≈ 11,500 years

So, the bone is approximately 11,500 years old.

Learn more about half-life here: https://brainly.com/question/29599279

#SPJ11

Answer:

A. 7

(assuming the water is neutral)

When in a particular titration, 5.0 ml of a 2.0 m NaOH(aq) solution exactly neutralizes 10.0 ml of an HCl(aq) solution. The concentration of the HCl (aq) solution is found to be 1M.

The balanced chemical equation is given as,

NaOH  + HCl → NaCl  +  H₂O

Number of moles of NaOH  =  molarity × volume /1000

=  5 x 2/1000  =  0.01  moles

With the help of mole ratio between NaOH to HCl which is 1 : 1

Number of moles of HCl given = 0.01 moles

Therefore, concentration = moles/volume x 1000

                                           = 0.01/10 x 1000 = 1M

Hence, the concentration of the HCl (aq) solution is 1M.

Learn more about concentration from the link given below.

https://brainly.com/question/31271061

#SPJ4

Answer:

The key difference between dissociation and solvation is that dissociation is the breakdown of a substance into the atoms or ions from which the substance is made of whereas solvation is the dissolution of a substance in a solvent due to the attraction forces between solvent molecules and the components.

Explanation:

Solvation refers to the process of surrounding solute particles with solvent molecules, leading to the formation of a solution. Dissociation specifically refers to the breaking apart of ionic compounds or molecules into their constituent ions when dissolved in a solvent.

Solvation occurs due to the attractive forces between the solute and solvent molecules, such as dipole-dipole interactions or hydrogen bonding. The result of solvation is the formation of a homogeneous solution where the solute particles are evenly distributed at the molecular level within the solvent.

Ionic compounds are composed of positively charged cations and negatively charged anions held together by electrostatic forces. When an ionic compound is dissolved in a solvent, such as water, the solvent molecules interact with the compound's ions, pulling them apart and surrounding them.

To learn more about the solvation, follow the link:

https://brainly.com/question/1118783

#SPJ6

The identity of the noble gas is the sample is Krypton

From the question, we are to determine the identity of the noble gas in the sample

From the ideal gas equation, we have that

PV = nRT

∴ n = PV / RT

Where P is the pressure

V is the volume

n is the number of moles

R is the gas constant

and T is the temperature

From the given information,

P = 678 mmHg = 0.892105 atm

V = 363 mL = 0.363 L

R = 0.08206 L.atm/mol.K

T = 35 °C = 35 + 273.15 K = 308.15 K

Putting the parameters into the equation, we get

n = (0.892105 × 0.363)/ (0.08206 × 308.15)

n = 0.0128 moles

Now, we will determine the Atomic mass of the sample

Using the formula,

Atomic = Mass / Number of moles

Atomic mass of the substance = 1.07 / 0.0128

Atomic mass of the substance = 83.6 amu

The noble gas with the closest atomic mass to this value is Krypton.

Molar mass of Krypton = 83.798 amu

Hence, the identity of the noble gas is the sample is Krypton

Learn more on Ideal Gas law here: https://brainly.com/question/20212888

#SPJ12

The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

Learn more about electronic configuration, here:

brainly.com/question/5624100

#SPJ4

A student has performed the heat of fusion lab and measured the heat of fusion to be 313 J/g. In order to calculate the percent error, we need to know the experimental value and the true value of the heat of fusion.

The formula to calculate the percent error is as follows: Percent error = (experimental value - true value) / true value * 100%To calculate the percent error for the student who performed the heat of fusion lab and measured the heat of fusion to be 313 J/g, we need to know the true value of the heat of fusion. The true value of the heat of fusion of a substance is the amount of energy required to melt one gram of that substance without changing its temperature. This value can be found in a reference book or online database.

For example, the true value of the heat of fusion of water is 333.55 J/g at 0°C. Therefore, we can calculate the percent error as follows: Percent error = (313 J/g - 333.55 J/g) / 333.55 J/g * 100% = -6.17%The negative sign indicates that the student's measurement is lower than the true value. The percent error of -6.17% means that the student's measurement is 6.17% lower than the true value of the heat of fusion.

To know more about experimental visit:

https://brainly.com/question/5421090

#SPJ11

Answer:

0.086

Explanation:

got it on acellus

The mass of the dry solute recovered from the given data is 0.086 g.  Option C

To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.

Given the data provided:

Boat Mass: 0.730 g

Boat + Solution: 0.929 g

Boat + Dry: 0.816 g

To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:

Mass of Dry Solute = (Boat + Dry) - (Boat Mass)

Mass of Dry Solute = 0.816 g - 0.730 g

Mass of Dry Solute = 0.086 g

Therefore, the correct answer is c) 0.086 g.

The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.

For more such questions on solute visit:

https://brainly.com/question/25326161

#SPJ8

The characteristics and the type of molecular bond they describe:

1. Bonds found in Halite (between Na⁺ and Cl⁻): Ionic bond

2. Bonds found between Si and O in the Si-O tetrahedron: Covalent bond

3. Bonds inside the water molecule (between the H and O): Covalent bond

4. Bonds that exist between two water molecules: Hydrogen bond

5. Strongest bond type: Covalent bond

6. Weakest bond type: Van der Waals bond

7. Bonds that are used by water to dissolve salt: Ionic bond

The ionic bond is a type of molecular bond found in halite (between Na⁺ and Cl⁻). The Si-O tetrahedron is held together by a covalent bond. The bond inside the water molecule (between the H and O) is also a covalent bond. The hydrogen bond is the type of bond that exists between two water molecules. The covalent bond is the strongest bond type, while the van der Waals bond is the weakest bond type. Water uses the ionic bond to dissolve the salt.

Learn more about bonds: https://brainly.com/question/32306693

#SPJ11

Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells.
Negative health consequences of a high amount of free radicals in the system include, Oxidative Stress, Inflammation, Cellular Damage.
Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals.


Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells. They are formed as natural byproducts of various biological processes in the body, such as metabolism, immune response, and environmental factors like pollution, radiation, or smoking. Free radicals are unstable and seek to stabilize themselves by oxidizing other molecules in the body, leading to a chain reaction of damage to cells, proteins, and DNA.

Negative health consequences of a high amount of free radicals in the system include:

Oxidative Stress: Excessive free radicals can cause oxidative stress, which is an imbalance between the production of free radicals and the body's antioxidant defenses. This can result in damage to cellular components and contribute to the development of chronic diseases, including cancer, cardiovascular diseases, neurodegenerative disorders, and aging.

Inflammation: Free radicals can trigger and perpetuate inflammation in the body. Chronic inflammation is associated with various health conditions, including arthritis, asthma, diabetes, and autoimmune disorders.

Cellular Damage: Free radicals can damage cell membranes, proteins, and DNA, leading to mutations, cell dysfunction, and impaired cellular processes. This can disrupt normal cell function and contribute to the development of diseases.

Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals. They help inhibit or reduce the oxidation of other molecules by donating an electron to stabilize the free radicals without becoming free radicals themselves. Antioxidants can be naturally occurring compounds found in fruits, vegetables, whole grains, nuts, and seeds, as well as synthetic substances. Some common antioxidants include vitamins C and E, beta-carotene, selenium, and various phytochemicals. Consuming a diet rich in antioxidants or supplementing with antioxidants can help protect against oxidative stress and mitigate the negative health consequences associated with high levels of free radicals.


To know more about Free radicals, click here, https://brainly.com/question/30045386

#SPJ11

Considering the definition of Avogadro's Number, 7.37×10²² moles of Cu are in a 3.56g sample of Cu?

The molar mass of substance is the amount of mass that a substance contains in one mole.

Avogadro's Number is the number of particles that make up a substance (usually atoms or molecules) in the amount of one mole of the substance. Its value is 6.023×10²³ particles per mole.

Avogadro's number applies to any substance.

The molar mass of Cu is 63.54 g/mole. The amount of moles of Cu can be calculated as:

amount of moles= 3.56 g÷ 63.54 g/mole

amount of moles= 0.056 moles

Now you can apply the following rule of three: 1 mole of the compound has 6.023×10²³ atoms, 0.056 mole contains how many atoms?

amount of atoms of Cu= (0.056 moles ×6.023×10²³ atoms)÷ 1

amount of atoms of Cu= 7.37×10²²

Finally, 7.37×10²² moles of Cu are present.

Learn more about Avogadro's Number:

brainly.com/question/11907018

#SPJ1

If all the copper in the trial reacts, then the amount of silver produced would be equal to the amount of copper present.

What is Silver nitrate?

Silver nitrate is a chemical compound with formula AgNO3. It is a strong oxidizing agent and is commonly used in chemistry experiments, photography, and in medical applications such as wound care. Silver nitrate is also used in some antiseptic products and in certain types of contact lenses.

Therefore, if the trial mentioned above contains 1 gram of copper, then 1 gram of silver would be produced.

What is Copper?

Copper is a reddish-brown metal that is malleable and ductile, and is one of the most conductive elements on the periodic table. It is often used in electrical wiring, piping, and other industrial applications because of its high electrical and thermal conductivity.

To know more about Silver nitrate,

https://brainly.com/question/29426334

#SPJ4

The temperature of the water sample increases by 8.7 °C after absorbing 1,174 joules of energy.

To calculate the temperature increase of a 28 g sample of water after absorbing 1,174 joules of energy, we need to use the specific heat formula:

\(\[ q = m \cdot c \cdot \Delta T \]\)

Where:

-\(\( q \)\) is the amount of heat energy absorbed (1,174 J in this case)

- m is the mass of the water sample (28 g)

- c is the specific heat of water (4.18 J/g°C)

- \(\( \Delta T \)\) is the change in temperature we want to find

Rearranging the formula to solve for\(\( \Delta T \)\):

\(\[ \Delta T = \frac{q}{m \cdot c} \]\)

Plugging in the given values:

\(\[ \Delta T = \frac{1,174 \, \text{J}}{28 \, \text{g} \times 4.18 \, \text{J/g°C}} = 8.7 \, \text{°C} \]\)

Learn more about temperature here:

brainly.com/question/7510619

#SPJ11

the producers' surplus at a price of $14 and MC = $6 would be $8.

The first step is to find the quantity supplied at the given price of $14. Substituting p = 14 in the supply equation, we get:
14 = 10 + 2q
4 = 2q
q = 2
Therefore, at a price of $14, the quantity supplied is 2 units. To calculate the producers' surplus, we need to find the area between the supply curve and the price line, up to the quantity supplied. This is a right triangle with base 2 (the quantity) and height (p - MC), where MC is the marginal cost of producing one unit. The marginal cost is not given, so we cannot calculate the exact value of producers' surplus. However, we can say that it will be positive as long as the price is above the marginal cost. If we assume a marginal cost of $6, for example, then the height of the triangle would be 14 - 6 = 8. The area would be (1/2) x 2 x 8 = $8. Therefore, the producers' surplus at a price of $14 and MC = $6 would be $8.

To know more about marginal visit:

https://brainly.com/question/14923834

#SPJ11

Answer:

Explanation:

Answer : The volume of gas will be, 31.26 L

Solution :

At STP, pressure of gas is 101.3 kPa and temperature of gas is 273 K.

The combined gas equation is,

where,

= initial pressure of gas = 145 kPa

= final pressure of gas = 101.3 kPa

= initial volume of gas = 20 L

= final volume of gas = ?

= initial temperature of gas = 250 K

= final temperature of gas = 273 K

Now put all the given values in the above equation, we get the final volume of gas.

Therefore, the volume of gas will be, 31.26 L

C. Standard temperature = 273.15 K. Standard pressure = 760 mmHg.

C. 6.87 L

D. 3.78 mmHg

A. 244.8 °C

STP stands for Standard Temperature and Pressure. It is a standard set of conditions used for scientific experiments and calculations. The standard temperature for STP is 0°C or 273.15 K, while the standard pressure is 1 atmosphere or 101.325 kPa.

At STP conditions, one mole of any ideal gas occupies a volume of 22.4 L. This value is known as the molar volume of a gas at STP. This is useful for many calculations, such as determining the number of moles or the mass of a gas in a given volume.

STP conditions are commonly used in gas law calculations and are also used as a reference point for determining the physical and chemical properties of gases.

Learn more about STP conditions, here:

https://brainly.com/question/29129606

#SPJ2

The final temperature when the mixture reaches equilibrium is approximately 0.5 degrees Celsius.

When the 50 g of ice at 0.0 degrees Celsius temperature is added to the 350 g of water at 32 degrees Celsius in a well insulated vessel, heat transfer occurs between the ice and the water until they reach equilibrium. The heat transfer causes the ice to melt and the water to cool down. At equilibrium, the final temperature of the mixture can be calculated using the principle of conservation of energy.

To find the final temperature, we can apply the equation:

m₁c₁ΔT₁ + m₂c₂ΔT₂ = 0,

where m₁ is the mass of ice, c₁ is the specific heat capacity of ice, ΔT₁ is the change in temperature of ice, m₂ is the mass of water, c₂ is the specific heat capacity of water, and ΔT₂ is the change in temperature of water.

Since the ice melts at 0 degrees Celsius, ΔT₁ is the difference between the final temperature and 0 degrees Celsius. Similarly, ΔT₂ is the difference between the final temperature and 32 degrees Celsius.

Assuming the specific heat capacity of ice is 2.09 J/g°C and the specific heat capacity of water is 4.18 J/g°C, we can plug in the values into the equation and solve for the final temperature. After calculations, we find that the final temperature when the mixture reaches equilibrium is approximately 0.5 degrees Celsius.

When two substances at different temperatures are combined, heat transfer occurs until they reach thermal equilibrium. The principle of conservation of energy governs this process, where the heat gained by one substance is equal to the heat lost by the other. Understanding the concepts of specific heat capacity and heat transfer allows us to calculate the final temperature of a mixture accurately.

Learn more about insulated vessel

brainly.com/question/13904749

#SPJ11