The amount of heat required to raise 200 g of aluminum from -20 to 45 degrees celsius if its specific heat is 0.21 J/g-°C is:O 17.3JO 2730O 1053O 38.13

You would need to take 5 mL of the 12 M acid and then make up to the 2000 mL mark.

The dilution formula is a mathematical expression used to calculate the new concentration of a solution . The dilution formula can be used to calculate the volume of a solution required in dilution. To use the formula, you must ensure that the units of concentration and volume are consistent

The final concentration of the solution is = Antilog (-1.5) = 0.03 M

Then;

12 * V = 2 * 0.03

Where V is the initial volume of the acid.

V = 0.005 L or 5 mL

Learn more about dilution formula:https://brainly.com/question/31598121

#SPJ1

Answer:

31.9988 grams.

this is your answer have a good day:)

Explanation:

Answer:

\(\huge\boxed{\sf m = 38.4\ grams}\)

Explanation:

Given:

No. of moles = n = 1.2 moles

Molar mass = M = 2*16 = 32 g/mol

Required:

Mass in grams = m = ?

Formula:

n = m / M

Solution:

1.2 = m / 32

m = 1.2 * 32

m = 38.4 grams

\(\rule[225]{225}{2}\)

Hope this helped!

Answer:

B. ΔG > 0, Q > K

Explanation:

For reverse reaction to take place Q should be greater than K

Since reverse reaction should be spontaneous, forward reaction should be non spontaneous.

So, for forward reaction, ΔG > 0

Hence, the correct answer is B

Answer:

they are:-

venturi meter.

orfice plate.

Dall tube .

pitot tube.

Averaging pitot tube .

cone meter.

linear resis meter.

The number of particles in 5.60 moles of ammonium sulfate is equal to  5.06  × 10²⁵ atoms.

Avogadro’s number expresses the number of chemical entities in one mole of a given substance. Generally, Avogadro’s number can express electrons, protons, molecules, atoms, and ions, depending upon the type of chemical reaction or reactant.

The value of Avogadro’s constant is found to be approximately equal to 6.022× 10²³ mol⁻¹.

Given, the number of moles of ammonium sulfate. =  5.60 mol

The molecular formula of ammonium sulfate is (NH₄)₂SO₄.

Number of molecules of ammonium sulfate in one mole = 6.022 × 10²³

The number of atoms in ammonium sulfate in one molecule = 15

Number of atoms of ammonium sulfate in one mole = 15× 6.022 × 10²³

The number of particles in 5.60 mol in (NH₄)₂SO₄ = 15× 6.022 × 10²³×5.60

                                                                        =  5.06  × 10²⁵ atoms

Learn more about Avogadro's number, here:

brainly.com/question/11907018

#SPJ1

The major product from the above organic reaction is I

In this reaction, methoxy ethane undergoes addition reaction with hydrogen bromide, Markownikoff's rule being involved in the reaction.

Organic compounds are the compounds which contains carbon and hydrogen.

Generally, organic compounds are characterized by the following:

Below are some classes of organic compounds:

So therefore, the major product from the the above organic reaction is IV

Learn more about organic compounds:

https://brainly.com/question/704297

#SPJ1

Answer

The pressure inside the cylinder will change to 14.686 atm

Explanation

Given:

Volume, V = 0.500 L

Moles of O2 = 0.150 mol

Temperature, T = 25 °C = (25 + 273.15 K) = 298.15 K

Step-by-step solution:

The first step is to calculate the pressure exerted by O2 using ideal gas equation:

Plugging the values of the parameters into the formula:

The pressure exerted by O2 = 7.343 atm

If 0.150 mol of sulfur dioxide, SO2 was added to the oxygen gas already in the cylinder, then the pressure inside the cylinder will change by a factor of 2. That is:

Total pressure will be = 2 x 7.343 atm = 14.686 atm

Or the total pressure can be calculated using the ideal equation above, and putting n = 0.150 mol + 0.150 mol = 0.3 mol

Answer: The volume of given container is 3.83 L.

Explanation:

Given: Mass of \(H_{2}\) = 0.224 g

Mass of \(N_{2}\) = 1.06 g

Mass of Ar = 0.834 g

Since, moles is the mass of a substance divided by its molar mass. Therefore, moles of given substances present in the mixture are as follows.

Moles of  \(H_{2}\) are:

\(Moles = \frac{mass}{molar mass}\\= \frac{0.224 g}{2 g/mol}\\= 0.112 mol\)

Moles of \(N_{2}\) are:

\(Moles = \frac{mass}{molar mass}\\= \frac{1.06 g}{28 g/mol}\\= 0.038 mol\)

Moles of Ar are:

\(Moles = \frac{mass}{molar mass}\\= \frac{0.834 g}{40 g/mol}\\= 0.021 mol\)

Total moles = (0.112 + 0.038 + 0.021) mol = 0.171 mol

Now, using ideal gas equation the volume is calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

\(V = \frac{nRT}{P}\\= \frac{0.171 mol \times 0.0821 L atm/mol K \times 273 K}{1 atm}\\= 3.83 L\)

Thus, we can conclude that the volume of given container is 3.83 L.

Biodiversity is critical to humans because it provides a range of ecosystem services that support life and well-being.

These services include the production of food, medicine, and building materials; regulation of the climate and disease control.

The value of biodiversity to agriculture is demonstrated by the fact that a single crop can depend on hundreds of species of insects, bacteria, and fungi.

Pollination, pest control, soil formation, nutrient cycling, and water filtration are all provided by diverse ecosystems.

Biodiversity also offers several advantages to human health.

The world's pharmacopoeia is made up of a significant percentage of natural products.

This includes more than 50,000 plant-based compounds, many of which are used to create drugs.

Coral reefs and rainforests are two examples of ecosystems that house a wide range of biological diversity.

These ecosystems are also home to a wide range of microorganisms that offer new leads for pharmaceutical development.

Furthermore, biodiversity provides spiritual, cultural, and recreational benefits.

As biodiversity is increasingly threatened, these essential benefits are being lost.

Protecting biodiversity and maintaining a healthy planet is critical to safeguarding human health and well-being.

Humans must work to conserve and manage biodiversity to ensure the continuation of the ecosystem services that are essential for our survival.

For more questions on Biodiversity

https://brainly.com/question/12183184

#SPJ8

Answer:

simple cations (monatomic cations of elements of only one possible charge)

Explanation:

Simple cations (monatomic cations of elements of only one possible charge)  are named using the unmodified element name and adding the word "ion"

For example, the Na+ is named the sodium ion.

An atom or molecule with a net electric charge as a result of the loss or gain of one or more electrons is known as an ion.

Answer:

Explanation:

To calculate the mass of carbon dioxide (CO2) produced by a quarter gallon of gasoline, we'll need the following information:

1. The molar mass of carbon dioxide (CO2): approximately 44.01 grams/mol.

2. The molarity of gasoline: 0.923 M.

3. The volume of gasoline: 1000 mL.

First, we need to convert the volume of gasoline from milliliters (mL) to liters (L):

1000 mL = 1000/1000 = 1 L

Next, we can use the equation relating molarity, volume, and number of moles:

Molarity (M) = Moles (mol) / Volume (L)

Rearranging the equation, we can solve for moles:

Moles (mol) = Molarity (M) * Volume (L)

Moles (mol) = 0.923 M * 1 L = 0.923 mol

Finally, we can calculate the mass of carbon dioxide produced by multiplying the number of moles by the molar mass:

Mass (g) = Moles (mol) * Molar mass (g/mol)

Mass (g) = 0.923 mol * 44.01 g/mol ≈ 40.60 g

Therefore, approximately 40.60 grams of carbon dioxide are produced by burning a quarter gallon of gasoline.

Answer:

81.65 g CO2

Explanation:

Answer:

They are all radioactive

Explanation:

Answer: They are all radioactive.

Explanation:

Apx

Answer:

d) The object falls towards the ground

Explanation:

The stage that this most accurately describes while using the PCR is the initiation of DNA synthesis, also known as the denaturation stage.

In the denaturation stage of Polymerase Chain Reaction (PCR), the double-stranded DNA template is heated to a high temperature to separate the two complementary strands and create single-stranded DNA. The denaturation stage is the first step in the PCR cycle.

In this stage, the heat-stable DNA polymerase denatures the DNA and the primers anneal to the complementary single-stranded template. This marks the beginning of the extension stage, where the DNA polymerase synthesizes new complementary strands along the template DNA.

Learn more on denaturation stage here: https://brainly.com/question/27493294

#SPJ1

Answer:

True

Explanation:

Assuming a similar number of molecules, the matter that occupies the most space is gas. Option C is correct.

This is because gases have no definite shape or volume, and their molecules are spread out, moving freely in all directions. As a result, gases tend to occupy the entire volume of their container and expand to fill the available space. This is known as the "kinetic molecular theory" of gases.

In contrast, solids and liquids have a definite volume and shape. Solids have a fixed shape and their molecules are packed closely together, while liquids have a variable shape and their molecules are less closely packed. As a result, both solids and liquids occupy less space than gases.

It is worth noting that the volume of a solid or liquid can change under certain conditions, such as changes in temperature or pressure. However, even under these conditions, the space occupied by a solid or liquid is still less than that occupied by a gas. Option C is correct.

The complete question is

Which of the following matters occupies more space, assuming similar number of molecules?

A. Solid

B. Liquid

C. Gas

D. Solid and gas

To know more about the Matter, here

https://brainly.com/question/30028447

#SPJ1

Answer:

I would place 0.5 M solution of the 6.0 stock solution to a 250 mL volumetric flask and then add 250 mL of water.

Explanation:

It would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

To calculate the energy required to vaporize a substance, we need to consider the heat of vaporization, which is the amount of energy required to convert a given amount of substance from its liquid state to its gaseous state at a constant temperature.

The heat of vaporization for copper is approximately 300 kJ/kg (kilojoules per kilogram) at its boiling point, which is around 2567 degrees Celsius (4649 degrees Fahrenheit). This means that for every kilogram of copper, 300 kJ of energy is needed to vaporize it.

Given that you have 2 kg of copper, we can calculate the total energy required as follows:

Energy = Heat of Vaporization × Mass

Energy = 300 kJ/kg × 2 kg

Energy = 600 kJ

Therefore, it would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

It's worth noting that the heat of vaporization can vary slightly depending on the purity of the copper and the specific conditions, such as temperature and pressure. The value provided here is an approximation. Additionally, it's important to handle copper and any high-temperature processes with caution, as they can pose safety hazards.

for more questions on vaporize

https://brainly.com/question/24258

#SPJ8

(a)  The mass percent of HCl in the solution is approximately 36.1%.

(b)  The molality of HCl in the solution is approximately 15.5 mol/kg.

(c)  The mole fraction of HCl in the solution is approximately 0.218.

(a) To calculate the mass percent of HCl, we need to determine the mass of HCl in a given volume of the solution.

Given: Concentration of HCl = 11.8 M

Density of the solution = 1.190 g/mL

First, we need to calculate the mass of the solution. Since density is mass per unit volume, the mass of 1 mL of the solution is 1.190 g.

Next, we need to calculate the mass of HCl in 1 mL of the solution. Since the concentration is given in moles per liter (M), and the molar mass of HCl is 36.46 g/mol, we can calculate the mass of HCl in 1 mL as follows:

Mass of HCl = concentration × volume × molar mass

          = 11.8 mol/L × 0.001 L × 36.46 g/mol

          = 0.430 g

Now, we can calculate the mass percent of HCl using the following formula:

Mass percent = (mass of solute ÷ mass of solution) × 100

           = (0.430 g ÷ 1.190 g) × 100

           ≈ 36.1%

(b) The molality of HCl is calculated by dividing the moles of solute (HCl) by the mass of the solvent (water) in kilograms.

Since the density of the solution is given as 1.190 g/mL, the mass of 1 mL of the solution is 1.190 g. However, we need to consider the density of the solvent (water) to calculate the mass of water in the solution.

Assuming the density of water is 1 g/mL, the mass of water in 1 mL of the solution is (1.190 g - 0.430 g) = 0.760 g.

To calculate the molality of HCl, we need to convert the mass of water to kilograms:

Mass of water (kg) = 0.760 g ÷ 1000 = 0.000760 kg

The molality (m) is calculated using the formula:

Molality = (moles of solute ÷ mass of solvent in kg)

        = (11.8 mol/L × 0.001 L) ÷ 0.000760 kg

        ≈ 15.5 mol/kg

(c) The mole fraction (X) of HCl is calculated by dividing the moles of HCl by the total moles of all components in the solution.

To calculate the mole fraction, we need to consider the volume of the solution and convert it to liters.

Given: Concentration of HCl = 11.8 M

Volume of the solution = 1 mL

Volume of the solution (L) = 1 mL ÷ 1000 = 0.001 L

To calculate the mole fraction of HCl, we need to calculate the moles of HCl and the moles of water (solvent) in the solution.

Moles of HCl = concentration × volume

            = 11.8 mol/L × 0.001 L

            = 0.0118 mol

Moles of water = mass of water ÷ molar mass of water

             = 0.760 g ÷ 18.015 g/mol (molar mass of water)

             = 0.0422 mol

Total moles in the solution = moles of HCl + moles of water

                           = 0.0118 mol + 0.0422 mol

                           = 0.054 mol

Mole fraction of HCl = moles of HCl ÷ total moles

                   = 0.0118 mol ÷ 0.054 mol

                   ≈ 0.218

For such more questions on molality

https://brainly.com/question/14366957

#SPJ8

Answer:

85% of 20 is 17

Explanation:

You can multiply 85% and 20 or subtract 85% from 20.

Answer:

\(d=6.34g/cm^3\)

Explanation:

Hello there!

In this case, since the calculation of density is performed by dividing the mass over volume:

\(d=\frac{m}{V}\)

Which gives us a better understanding of the degree of compactness of the object; we can find the required density in grams per cubic centimeter by applying the following dimensional analysis in the aforementioned equation:

\(d=\frac{0.0124kg}{1893mm^3} *(\frac{10mm}{1cm} )^3*\frac{1000g}{1kg}\\\\d=6.34g/cm^3\)

Regards!

In 4.38 × 10^21 molecules of water, there are approximately 0.073 moles.

To calculate the number of moles, we can use Avogadro's number, which states that 1 mole of a substance contains 6.022 × 10^23 molecules. So, by dividing the given number of molecules (4.38 × 10^21) by Avogadro's number, we can find the number of moles.

Now, let's explain the process in detail. Avogadro's number is a constant that represents the number of particles (atoms, molecules, etc.) in one mole of a substance. It is approximately 6.022 × 10^23. Therefore, if we divide the given number of molecules by Avogadro's number, we can determine the number of moles.

In this case, we divide 4.38 × 10^21 molecules by 6.022 × 10^23 molecules/mole, resulting in approximately 0.073 moles.

Significant figures play an important role in reporting the answer. The given number of molecules has three significant figures (4, 3, and 8), so our answer should be reported with three significant figures as well. Therefore, the number of moles is approximately 0.073.

for such more questions on molecules

https://brainly.com/question/475709

#SPJ8

B. An electron EMITS a photon as it goes from a HIGHER TO LOWER energy level.

When an electron in an atom drops from a higher energy level to a lower energy level, it releases energy in the form of a photon.

What is Spectrum?

In science, the term "spectrum" is often used to describe the range of colors of visible light, known as the "visible spectrum," which includes all the colors of the rainbow. This spectrum is produced when white light is dispersed into its component colors by a prism or other means.

This energy is specific to the atom and its electron configuration, which is why each atom emits a unique set of wavelengths, creating a distinct emission spectrum.

Since the emission spectrum in the question has a line in the blue region, it means that the energy released by the electron corresponds to a specific frequency or wavelength in the blue region of the visible spectrum.

Learn more about Spectrum from given link

https://brainly.com/question/2261239

#SPJ1

Bronsted-Lowry acid-base reaction, Lewis acid base reaction, Lewis acid-base reaction, and Arrhenius acid-base reaction and Bronsted-Lowry acid-base reaction are some examples of acid-base reactions.

Lewis acidity and basicity are based on the sharing of an electron pair, unlike the Brnsted-Lowry and Arrhenius classifications, which are based on the transfer of protons. Lewis bases can give away an electron pair, whereas Lewis acids can absorb one.

Nitric acid, hydrobromic acid, and sulfuric acid (H2SO4) are further Arrhenius acids. (HNO3). Sodium hydroxide (NaOH) and potassium hydroxide are examples of Arrhenius bases. (KOH).

To know more about  Lewis acid visit:-

https://brainly.com/question/15570523

#SPJ1

Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.

On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.

In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.

Know more about Coulomb's law here:

https://brainly.com/question/26892767

#SPJ8

Answer:

Potassium, sulfur, fluorine, barium

The elements that will lose one electron are:

a. sodium

d. Potassium

An element in its natural state has an equal number of protons and electrons, giving it a net charge of zero; however, when an element loses an electron as part of a chemical reaction it becomes positively charged, or oxidized.

Out of the given options, sodium and potassium looses one electron and attains a positive charge leading to the formation of cation. While Fluorine and chlorine gains one electron and attains a negative charge leading to the formation of anion.

Thus, correct options are a and d.

Find more information about Cations here:

brainly.com/question/14309645

Answer:

C2H8N

Explanation:

it wont change since there is no common factor between the 2:8:1 which will give us a whole number so it stays the same

Answer:

The atomic size decreases with an increase in atomic number when we move from left to right.

Explanation: Hope it helps you:))))))

                      Have a great day.