The 23rd century starship Enterprise uses a substance called "dilithium crystals" as its fuel.(d) To determine the energy potential of the fusion processes in parts (b) and (c), compare the changes in mass per kilogram of dilithium and of ⁴He(b) How much energy is released per kilogram of dilithium formed? (Mass of one ⁶ Li atom is 6.015121 amu.)(c) When four ¹ H atoms fuse to form ⁴He, how many positrons are released?

The moles of potassium oxide will be formed when 1.52 moles of potassium react with oxygen are 0.76 moles.

According to the given reaction:

4 K + O₂ → 2 K₂O

We can see that 4 moles of potassium react with 1 mole of oxygen to produce 2 moles of potassium oxide.

To find the number of moles of potassium oxide formed when 1.52 moles of potassium reacts with oxygen, we can use the following process:

1.52 moles K ( 2 moles K₂O/ 4 mol K)= 0.76 moles K₂O

Therefore, the answer is 0.76 moles of potassium oxide will be formed.

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Answer:

If it's multiple choice it's 2 and 3, if not I think the best answer is 2, but I'm not exactly sure.

Answer:

true

Explanation:

took the test

"Hypotonic solution," refers to a solution with the highest water concentration due to its lower solute concentration compared to the other options, leading to water influx into cells.

A hypotonic solution would be most likely to have the highest water concentration. In a hypotonic solution, the solute concentration is lower than that inside the cell or compared to another solution. As a result, water tends to move into the cell or the solution to equalize the concentration.

When a cell is placed in a hypotonic solution, water molecules will move into the cell through the process of osmosis. This influx of water increases the water concentration inside the cell, leading to cell swelling or even bursting in extreme cases.

Compared to hypertonic and isotonic solutions, a hypotonic solution has a lower solute concentration, allowing for a higher concentration of water molecules. This results in a higher water concentration in the solution. It's important to note that the concept of tonicity is related to the relative solute concentrations between two solutions and their effect on cell osmosis. In this case, a hypotonic solution is characterized by a higher water concentration compared to the other options.

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the real gas pressure for above question was 91.4atm

what is van der waals equatio?

The Van der Waals equation (or Van der Waals equation of state) is an equation of state used in chemistry and thermodynamics that extends the ideal gas law to take into account the effects of interactions between molecules in a gas as well as accounting for the finite size of the molecules.

The ideal gas law views gas molecules as point particles that interact only with their surroundings and not with one another, which means that when they collide, they do not occupy any space or change their kinetic energy.

The volume V occupied by n moles of any gas has a pressure P at a temperature T determined by the following relationship, according to the ideal gas law, where R is the gas constant:

PV=nRT

(pxn2a/v2) (v-nb)=nRt

p 10x1.36/2.41x2.41-10x0.0318

p 13.6/2.41x2.092

nRt=p2.69

10x0.08206x300/2.69

=91.4atm

therefore the real gas pressure =91.4atm

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Answer:

Water molecules pull the sodium and chloride ions apart

Explanation:

The major organic product obtained from the given reaction sequence is 2-bromo-1-chlorobenzene.

In the first step of the reaction sequence, NaN02 (sodium nitrite) and HCl (hydrochloric acid) are used to convert an amine group (-NH2) to a diazonium salt (-N2+). This step is known as diazotization. The specific compound involved in the reaction is not mentioned in the question, so we'll assume it is an aromatic amine.

In the second step, HBr (hydrobromic acid) and CuBr (copper(I) bromide) are added. The diazonium salt reacts with HBr to form a bromoarene compound. The CuBr serves as a catalyst for the reaction.

The product obtained from the reaction sequence is 2-bromo-1-chlorobenzene. The amine group (-NH2) in the starting compound is replaced by a bromine atom (-Br) through the diazotization and bromination reactions.

It's important to note that without specific details about the starting compound, the exact product cannot be determined. However, based on the given reaction sequence, 2-bromo-1-chlorobenzene is the expected major organic product.

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Answer: 2 m/L

Explanation: If there is 50g in every m/L and you need 100g, you can take the 100g / 50g, and you have 2, meaning two sets of 50 grams, or in this case to m/L of medicine, because each m/L has 50 grams of medicine in it.

Answer:

1.35 M

Explanation:

grams/molar mass=ans./volume(L)

100/164=ans./.450

Answer:

c

Explanation:

The innate immune system is the body's first line of defense against germs entering the body. It responds in the same way to all germs and foreign substances, which is why it is sometimes referred to as the "nonspecific" immune system

Answer:

the answer is potassium bromide

Answer:

POTASSIUM BROMIDE

Explanation:

At room temperature, potassium reacts with bromine, and by synthesis, this compound is formed. The chemical equation of this reaction is 2 K + Br2 = 2KBr. Potassium bromide has an immense contribution to medical science.

BaF2 dissolves in pure water at a solubility of around 0.011 mg/mL.

Instead of having a concentration, BaF2 is a pure solid in the reaction and the equilibrium expression is thus: Ksp=[Ba2+][F]2. It is known as the solubility product constant since it is just a product of the concentrations of the products.

\(BaF2(s) ⇌ Ba2+(aq) + 2F-(aq)\)

\(Ksp = [Ba2+][F-]^2\)

\(s = [Ba2+] = [F-]\)

Substituting into the Ksp expression:

\(Ksp = s^3\)

Solving for s:

\(s = (Ksp)^(1/3)\)

\(s = (1.7 x 10^-6)^(1/3)\)

\(s ≈ 0.011 mg/mL\)

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Answer:

Explanation:

Part 1

Proton is located in the nucleus and has a charge of +1

Neutron is located in the nucleus and has no charge.

Electron is located outside the nucleus and has a charge of -1. Amu is .00055.

Part 2

Potassium has 19 protons, (39 - 19 = 20 neutrons), and 19 electrons.

Calcium has 20 protons, (40 - 20 = 20 neutrons), and 20 electrons.

Part 3

Isotopes have different numbers of neutrons.

Most common isotope of carbon is carbon-12. Carbon-12 has 6 protons, 6 neutrons, and 6 electrons.

Boron-10 has 5 protons, 5 neutrons, and 5 electrons.

Boron-11 has 5 protons, 6 neutrons, and 5 electrons.

Note: In neutral elements, as you have here, the number of protons equals the number of electrons.

To find the number of protons, use the atomic number, which is above the symbol for the element on your worksheet.

To find the number of neutrons, subtract the protons from the mass of the element. Example Boron-11 has a mass of 11, so 11 - 5 protons = 6 neutrons.

The correct order is Kr>Ge>As>K>Ca based on the atomic sizes over the periods of the periodic table.   

The atomic number or nuclear charge number (symbol Z) of a chemical element is the nuclear charge number. For normal atomic nuclei, this equals the number of protons (np) or the number of protons found in the nucleus of each atom of that element. Atomic numbers can be used to uniquely identify common chemical elements.

The correct order is Kr>Ge>As>K>Ca based on the atomic sizes over the periods of the periodic table.  

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According to the question the concentration of sulfur trioxide 0.0054mol/L.

Trioxide is a chemical compound made up of three atoms of oxygen. It can exist as a solid, liquid or gas depending on the temperature and pressure conditions. It has a formula of O₃ and is also known as ozone. Trioxide is a powerful oxidizer and is corrosive to many materials, particularly organic compounds.

The concentration of sulfur trioxide in this reaction can be calculated using the mass balance equation. The equation is as follows:
Mass of Sulfur Trioxide (g) = (Mass of Sulfur (g) x 2) / Molecular Mass of Sulfur Trioxide
In this case, the mass of sulfur trioxide = (6.5g x 2) / 80.06g = 0.163g
Therefore, the concentration of sulfur trioxide = 0.163g/30.2g = 0.0054mol/L

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Complete Question:
If 6. 5g of sulfur reacted with oxygen to produce sulfur trioxide. What is the concentration to sulfur trioxide 2SO_2 +30_2→ 2SO_3?

Cocaine is a powerful stimulant that affects the central nervous system by selectively blocking sodium (Na+) channels. These channels are responsible for regulating the movement of sodium ions into and out of cells, which is essential for proper nerve and muscle function.

When cocaine binds to these channels, it prevents sodium from entering the cells, leading to an accumulation of electrical charge on the outside of the cell membrane. This disrupts the normal flow of electrical signals in the brain, causing an intense rush of euphoria and energy. However, prolonged cocaine use can lead to addiction, as well as a range of serious health problems, including cardiovascular disease, respiratory failure, and seizures.

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Oxygen gas is most likely to act as an ideal gas at STP. Therefore, option B is correct.

An ideal gas is a hypothetical gas composed of randomly moving point particles without interparticle interactions. The ideal gas is useful because it follows the ideal gas law.

Under various conditions of temperature or pressure, many real gases behave like an ideal gas where the gas molecules as the ideal particles. Many gases such as nitrogen gas, oxygen gas, hydrogen gas, noble gases, some heavier gases such as carbon dioxide, and mixtures such as air, can be treated as ideal gases.

A gas behaves more likely as an ideal gas at higher temperature and lower pressure, as the potential energy because intermolecular forces become less and the size becomes less significant compared to the vacant space between them.

One mole of an ideal gas has a volume of 22.7 liters at standard temperature and pressure. At high pressures, the volume of a real gas is generally larger than that of an ideal gas.

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The literature provides the viscosity values of 1-pentanol and 1-propanol at 25 degrees Celsius.

To determine the viscosity of 1-pentanol and 1-propanol at 25 degrees Celsius, we can refer to the literature, such as scientific journals, textbooks, or databases that provide data on the physical properties of various substances. These sources often provide tables or graphs that list the viscosity values of different compounds at different temperatures.

By consulting the literature, we can find the specific viscosity values of 1-pentanol and 1-propanol at 25 degrees Celsius. The viscosity is typically expressed in units of centipoise (cP) or millipascal-second (mPa·s). These values represent the resistance of the liquids to flow and give us an indication of their internal friction.

It is important to note that the viscosity of substances can vary depending on factors such as purity, pressure, and the presence of impurities. Therefore, it is essential to refer to reliable and up-to-date literature sources to obtain accurate viscosity values for 1-pentanol and 1-propanol at 25 degrees Celsius.

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Answer:

The concentration of the solution is 5.8168 × \(10^{-4}\) mol.\(dm^{-3}\)

Explanation:

Here, we want to calculate the concentration of the solution.

The unit of this is mol/dm^3

So the first thing to do here is to calculate the number of moles of the solute present, which is the number of moles of AlCO3

The number of moles = mass/molar mass

molar mass of AlCO3 = 27 + 12 + 3(16)  = 27 + 12 + 48 = 87g/mol

Number of moles = 33.4/87 = 0.384 moles

This 0.384 moles is present in 660 L

x moles will be present in 1 dm^3

Recall 1 dm^3 = 1L

x * 660 = 0.384 * 1

x = 0.384/660 = 0.00058168 = 5.8168 * 10^-4 mol/dm^3

Answer:

Molar mass of C3H8 = C 3 (12.01 g/mol) = 36.03 (g/mol)

H 8 (1.008 g/mol) = 8.064 (g/mol)

44.09 (g/mol)

74.6 g propane x 1 mole propane x 6.022 x 10

23

molecules

44.09 g propane 1 mole propane

= 1.02 x 10

24 molecules propane

Explanation:

Answer:

v = 15/2

Decimal Form:

v = 7.5

Mixed Number Form:

v = 7  1/2

Explanation:

Hope this helps!

Preheat both the stemless funnel and the filter paper with boiling water due to the fact crystallization can go through at the funnel which then can clog the lowest and block the drift of filtrate all through filtration.

Acetanilide also can be prepared with the aid of acetylating aniline with acetic anhydride inside the presence of focused hydrochloric acid. Dissolve aniline in hydrochloric acid and add acetic anhydride, then stir properly. Pour the aggregate of sodium acetate into water.

Acetanilide, an artificial organic compound added to therapy in 1886 as a fever-reducing drug. Its effectiveness in relieving aches turned into determined soon thereafter, and it became used as an alternative to aspirin for decades in treating such commonplace complaints as headaches, menstrual cramps, and rheumatism. Acetanilide is a weak base because of the resonance systems it suggests. The compound is a beginning fabric for plenty of pharmaceutical capsules like sulfanilamide, a topical antibacterial, antifungal medicine.

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Secondary minerals are generally more chemically reactive than primary minerals is a false statement.

Primary minerals are generally more chemically reactive than secondary minerals. Primary minerals are the original minerals formed during the cooling and solidification of molten rock or during the crystallization of mineral-rich fluids. They are often rich in elements like magnesium, iron, and aluminum and are chemically unstable under conditions found at the Earth's surface. Primary minerals weather and break down over time, releasing their constituent elements into the environment.

Secondary minerals, on the other hand, are formed from the alteration or transformation of primary minerals. They are often less reactive and more stable than primary minerals under surface conditions. Secondary minerals are formed through processes like weathering, hydrothermal alteration, and diagenesis. They include minerals like clays, carbonates, and sulfates, which are typically less reactive and more resistant to chemical weathering than primary minerals.

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Answer:

The ideal gas law is expressed mathematically by the ideal gas equation as follows;

P·V = n·R·T

Where;

P = The gas pressure

V = The volume of the gas

n = The number of moles of the gas present

R = The universal gas constant

T = The temperature of the gas

A situation where the ideal gas law is exhibited is in the atmosphere just before rainfall

The atmospheric temperature of the area expecting rainfall drops, (when there is appreciable blockage of the Sun's rays by cloud covering) followed by increased wind towards the area, which indicates that the area was in a state of a low pressure, 'P', and or volume, 'V', or a combination of both low pressure and volume P·V

When the entry flow of air into the area is observed to have reduced, the temperature of the air in the area is simultaneously sensed to have risen slightly, therefore, the combination of P·V is seen to be proportional to the temperature, 'T', and the number of moles of air particles, 'n' in the area

Explanation:

Answer:

B

Explanation:

The following characteristics do all unicellular organisms share is all unicellular organisms have a nucleus. Hence option B is correct.

Nucleus is defined as an organelle with two membranes that houses the genetic material and other instructions needed for cellular functions. The nucleus carries the genes, which are the structures that house the hereditary information, and governs and regulates the functions of the cell. The nucleus functions as the cell's control center and genetic information store by containing the genome.

Unicellular organisms are defined as an organism made up of a single cell in which all of the body's functions, including reproduction, eating, digestion, and excretion, take place. Even though they exist on their own, unicellular creatures play a crucial part in the environment.

Thus, the following characteristics do all unicellular organisms share is all unicellular organisms have a nucleus. Hence option B is correct.

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Answer:

The correct answer is - 1/4096.

Explanation:

In the starting, there is that the number of atoms is  N 0 .

The number of half-lives in this case, = 300/ 25 = 12

After the first half-lives or 25 days,  N 1 = N 0 /2

the half life is that time where half of the sample had decay.

After the second half-life or 50 days,  N 2 = N 1 /2  = N 0 /4 .

There is division by two the original amount, then after four times you divide four times for  2  that means that you divide by  2 ^12  =4096 .

So the final amount remain is  N 12 = N 0 /4096  or 1/4096.

After using the Balanced equation the answer is The 36 gram of water can be made.

What is Balanced equation?

A balanced equation is a chemical equation in which the total number of atoms of each element on the left side of the equation is equal to the total number of atoms of that element on the right side of the equation. This means that the equation is balanced in terms of mass and charge, and all atoms are accounted for. A balanced equation is essential to ensure that the chemical reaction is accurate and that the correct amount of products are produced. Additionally, a balanced equation can help in the calculation of reaction rates and equilibrium concentrations.

The molar mass of O is 16g and Hydrogen is 1g in H2O there is one oxygen only but in question is given 32g of oxygen so, 2 moles of oxygen should be there so it will become 32g that means 2H2O so overall 2[2*1+16] = 36g.

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An electron cannot have the quantum numbers n= 6   , l= 1    , m/= 0  . Option C.

Quantum numbers are the set of numbers used to describe the position and energy of an electron in an atom. There are four types of quantum numbers: principal, azimuthal, magnetic, and spin.

There are four quantum numbers in atoms: the principal quantum number (n), orbital angular momentum quantum number (l), magnetic quantum number (m), and electron spin quantum number(m). An electron with principal quantum number of 6 can only have angular momentum of 4 and above.

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