In a neutral aluminum atom with atomic number 13, how many
protons, neutrons and electrons are there?

Answer:

It's b

Explanation:

I had the same exact question

Answer:

octane is the answer have a good day

Answer:

Picture 1: Unhealthy

Picture 2: Healthy

Explanation:

Too much algae can start releasing toxins into the air burning the ozone hole and affecting climate change

Invertebrates are healthy, like bees who make honey for us., In truth most bugs we need in this world, even if we don't notice them

Brainliest please

To determine the pressure of the ammonia gas at a new volume and temperature, we can use the combined gas law, which states that the ratio of the initial pressure, volume, and temperature is equal to the ratio of the final pressure, volume, and temperature.

Using the combined gas law equation: (P1 * V1) / T1 = (P2 * V2) / T2

Given:

P1 = 585 torr (initial pressure)

V1 = 20.0 ml (initial volume)

T1 = 20.0 °C + 273.15 = 293.15 K (initial temperature)

V2 = 50.0 ml (final volume)

T2 = 50.0 °C + 273.15 = 323.15 K (final temperature)

We need to solve for P2 (final pressure).

Rearranging the equation, we have:

P2 = (P1 * V1 * T2) / (V2 * T1)

Substituting the given values into the equation:

P2 = (585 torr * 20.0 ml * 323.15 K) / (50.0 ml * 293.15 K)

Calculating this expression gives us the final pressure (P2) of the ammonia gas at the new volume and temperature.

In summary, using the combined gas law equation, we can determine the pressure of the ammonia gas at a new volume and temperature. By substituting the given values into the equation and performing the calculation, we can find the final pressure of the gas.

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Answer:

6

Explanation:

The equation given in this question is:

H₂ + N₂ ---> NH₃

To balance this equation i.e to make sure that the number of atoms on each side of the equation is the same, one would make use of coefficients.

The balanced equation is:

3H₂ + N₂ ---> 2NH₃

The coefficients are the number behind each element or molecule. According to this question, the sum of each coefficient is 3 + 1 + 2 = 6

Answer:

D

Explanation:

A is a compound

B is purified water

C is a substance made by two substances

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The decomposition of nitroglycerin is an exothermic reaction. Therefore, the magnitude of ΔH° for the decomposition of 2 moles of nitroglycerin represents the heat released during the decomposition process, in kJ.

In this context, ΔH° refers to the standard enthalpy change of the reaction, and its magnitude represents the heat energy that is released or absorbed during the reaction. A negative magnitude for ΔH° signifies that the reaction is exothermic and releases heat, while a positive magnitude signifies that the reaction is endothermic and absorbs heat.

So, the decomposition of nitroglycerin is an exothermic reaction. Therefore, the magnitude of ΔH° for the decomposition of 2 moles of nitroglycerin represents the heat released during the decomposition process, in kJ.

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A pi bond is the result of the d) sideways overlap of two parallel p orbitals.

Pi bonds are bonds that occur as a result of overlapping orbitals of atoms that are not in the bond axis. Each p orbital that contributes to a pi bond has two lobes and has a node at the core.

The pi orbital can hold a maximum of two pairs of electrons. Whereas each electron in a pi bond is also called a pi electron, the pi electrons are used for double bonds or triple bonds. The 2p orbital of carbon has slightly higher energy than the sp2 orbital, so the pi bond formed from two 2p orbitals has somewhat higher energy and is slightly less stable than the sp2-sp2 sigma bond.

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The weight percent of total ferrite formed in the hypoeutectoid steel is 75%, and of eutectoid cementite formed is 25%.

To solve this problem, we need to use the iron-carbon equilibrium phase diagram.

First, we need to determine the phase transformation that occurs during the cooling process. The cooling curve intersects the liquidus line at 950°C, and then intersects the solidus line at just slightly below 727°C. This means that the steel undergoes a cooling process where it transforms from the austenite phase to a mixture of ferrite and cementite.

Next, we need to use the given tie line to determine the weight percent of ferrite and cementite that forms. The tie line is a horizontal line that intersects the eutectoid composition line at the point where the weight percent of carbon is 0.8%.

Since the initial carbon content of the steel is 0.25%, it is hypoeutectoid. This means that the steel will transform into a mixture of ferrite and cementite. To calculate the weight percent of each phase, we need to find the intersection of the cooling curve with the tie line.

Let's assume that the cooling curve intersects the tie line at a weight percent of carbon of x%. Then, the weight percent of ferrite in the mixture is given by the distance from the tie line to the cooling curve, divided by the total length of the tie line. Similarly, the weight percent of cementite in the mixture is given by the distance from the cooling curve to the eutectoid composition line, divided by the total length of the tie line.

Using the tie line, we can see that the length of the tie line is 0.4%, since it intersects the eutectoid composition line at a weight percent of carbon of 0.8%, and the hypoeutectoid steel has a carbon content of 0.25%.

From the tie line, we can also see that the distance from the tie line to the cooling curve is 0.3%, and the distance from the cooling curve to the eutectoid composition line is 0.1%.

Therefore, the weight percent of ferrite in the mixture is:

0.3 / 0.4 x 100% = 75%

And the weight percent of cementite in the mixture is:

0.1 / 0.4 x 100% = 25%

So, the weight percent of total ferrite formed in the hypoeutectoid steel is 75%, and the weight percent of eutectoid cementite formed in the hypoeutectoid steel is 25%.

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ANSWER

The mass of titanium is 22.6 grams

OPTION B

STEP-BY-STEP EXPLANATION

Given data:

The mole of titanium = 0.473 mole

Let x be the mass of titanium in grams

The mass of titanium can be calculated using the below formula

From the above formula, you can see that the molar mass of titanium is not given, and that can easily be determined using our periodic table.

From the periodic table, the molar mass of titanium is 47.867 g/mol.

The next thing is t substitute the value into the above formula

since x represents the mass of titanium in grams, therefore, the mass of titanium is 22.6 grams

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.

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The ATP (Available-to-Promise) for weeks 1 to 8 is the amount of inventory that a firm can commit to fulfilling customer orders within that time frame.

To calculate the ATP, you need to consider the MPS (Master Production Schedule) and the ATP calculations.

1. Start by looking at the MPS for weeks 1 to 8. The MPS represents the planned production quantities for each week.
2. Determine the beginning inventory for week 1. This is the inventory available at the start of week 1.
3. Add the MPS quantity for week 1 to the beginning inventory. This gives you the available inventory for week 1.
4. Subtract customer orders for week 1 from the available inventory. This gives you the remaining inventory after fulfilling customer orders for week 1.
5. Repeat steps 3 and 4 for each subsequent week, using the previous week's remaining inventory as the beginning inventory for the next week.
6. Continue this process until you reach week 8, calculating the available inventory and subtracting customer orders for each week.
7. The resulting values represent the ATP for weeks 1 to 8.

The ATP can fluctuate as new customer orders are received or changes are made to the MPS. Regular monitoring and adjustment of the ATP is necessary to ensure accurate order fulfillment.

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Balanced chemical equation for reaction of hydronium ions with calcium carbonate will be as follows:

2H3O+ (aq) + CaCO3 (s) => Ca2+ (s) + 3H2O (l) + CO2 (g)

In this balanced chemical equation, acidic aqueous solution of hydronium ion (H3O+) reacts with calcium carbonate salt (CaCO3) resulting in the formation of calcium cation (Ca2+) an alkali, that results in neutralization of excessive acid. It also forms liquid water (H2O) along with liberation of carbon dioxide gas (CO2).  All acids stronger than hydrogen carbonate, provide their calcium salts dissolved in water yielding carbon dioxide, because a bare hydrogen ion has no chance of surviving in water.

To balance this chemical equation, 2 molecules of hydronium ions react with 1 molecule of calcium carbonate resulting  in formation of 1 molecule of calcium cation, 3 molecules of water and 1 molecule of carbon dioxide. The reaction proceeds at room temperature.

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Answer:

Explanation:

relation between energy wavelength and frequency.....

we know that energy of photon is

E=hf  but

v=fλ

f=v/λ when v=c(speed of light) then f=c/λ

putting the value of f in the equation of photon

E=hc/λ this equation gave a relation between wavelength frequency and energy in electromagnetic  waves

among electromagnetic waves UV rays are most dangerous because exposure to these radiation cause serious problems in living organism

Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. The relation that we use in case of electromagnetic wave is E=hc/λ

Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave

There is a relation between energy of wave. frequency of wave, and wavelength of wave

Mathematically,

E=hc/λ

where,

E = energy of electromagnetic wave

h is planks constant having value 6.67×10⁻³⁴js

c is speed of light that is 3×10⁸m/s

λ  is the wavelength of electromagnetic wave

Thus the relation that we use to find the energy of electromangetic wave is E=hc/λ

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P1V1T1=P2V2T2 Add 273 to convert degrees Celsius to Kelvin:

∴200×25/298=250×V2/273, ∴V2=200×25×273/298×250, ∴V2=18.32L

The basic formula for volume is length, breadth, and height, as opposed to length, width, and height for the area of a rectangular shape. The calculation is unaffected by how you refer to the various dimensions; for instance, you can use "depth" instead of "height."

Volume, which is measured in cubic units, is the 3-dimensional space occupied by matter or encircled by a surface. The cubic meter (m3), a derived unit, is the SI unit of volume.

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The particle that makes the atom an unstable isotope is the neutron. When there is an excess or a deficiency of neutrons in an atom's nucleus, it becomes an unstable isotope.

Unstable isotopes are isotopes that decay and emit radiation until they reach a stable state. They are also known as radioactive isotopes. The radioactive isotopes are unstable and have an unpredictable lifespan because they have an unstable ratio of neutrons to protons. This excess of neutrons in the nucleus results in a greater electrostatic repulsion between protons, causing instability and eventually decay.Neutrons are the particles that are responsible for making atoms unstable isotopes. The excess or deficiency of neutrons in an atom's nucleus leads to an unstable state and eventually decay. Radioactive isotopes are important for various practical applications such as nuclear power, radiography, and cancer treatment.

Therefore, neutrons makes the atom an unstable isotope. The decay of unstable isotopes can be used for many practical applications such as nuclear power, radiography, and cancer treatment.

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The role of the forensic chemist in the Pan Am Flight 103 investigation was primarily focused on identifying the explosive used, which is crucial in determining the cause of the explosion and providing valuable evidence for the investigation.

The role of the forensic chemist in the Pan Am Flight 103 investigation involved identifying the explosive used. In this case, the forensic chemist would have analyzed the debris from the wreckage to determine the type of explosive that was used to cause the explosion.

To identify the explosive, the forensic chemist would have used various techniques, such as spectroscopy and chromatography, to analyze the chemical composition of the debris. By comparing the results with known explosives, the forensic chemist would have been able to determine the specific type of explosive used.

The identification of the explosive is crucial in the investigation as it helps in determining the cause of the explosion and provides valuable information about the perpetrators. Different types of explosives leave distinct chemical signatures, which can be used to link the explosion to a specific group or individual.

In addition to identifying the explosive, the forensic chemist may have also been involved in determining the cause of death of the victims. This could include analyzing autopsy samples for the presence of explosive residue or other chemical substances that could have contributed to the deaths.

It's important to note that while identifying the explosive and determining the cause of death are key responsibilities of a forensic chemist, other experts such as forensic pathologists and dental professionals would have been involved in identifying the victims from dental records and reconstructing the accident.

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Answer:

A. Clastic sedimentary rocks

Explanation:

Chemical form = CaCO3

Clastic sedimentary rocks form from the accumulation and lithification of mechanical weathering debris. Examples include: breccia, conglomerate, sandstone, siltstone, and shale.

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The major organic product obtained is hexanol.

With a six-carbon chain and the condensed structural formula CH3(CH2)5OH, 1-hexanol is an organic alcohol. This white liquid is miscible with ethanol and diethyl ether but only slightly soluble in water.

Hexanal is an alkyl aldehyde used in the flavour business to create fruity flavours. It is also known as hexanaldehyde or caproaldehyde. It smells like freshly cut grass, similar to cis-3-hexenal. It has the potential to be helpful as a fruit preservation natural extract.

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Answer:

In one mole of glucose, there are

6.022×1023

individual glucose molecules

Explanation:

Tin is not easily oxidized and resists corrosion because it is protected by an oxide film. Tin resists corrosion from distilled sea and soft tap water, and can be attacked by strong acids, alkalis and acid salts. Tin is used in for can coating: tin-plated steel containers are widely used for food preservation.

What happens when tin reacts with acid?

Characteristics: Metallic tin is soft and malleable. It slowly dissolves in dilute nonoxidizing acids or more readily in hot concentrated HCl. It reacts with HNO3 to form metastannic acid, H2SnO3, a white substance insoluble in alkalies or acids.

Tin can it oxidize things?

A reducing agent is TIN(II) OXIDE. due to slow oxidation to tin(IV) oxide, unstable in air. This oxidation starts to burn incandescently at 300 °C. powerful oxidizing agents incompatible.

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Answer:

The correct answer is the third option.

Explanation:

\(2NBr_3 + 3NaOH\rightarrow N_2 + 3NaBr + 3HOBr\)

Moles of nitrogen tribromide = 40 mol

Moles of sodium hydroxide = 48 mol

According to reaction, 2 moles of nitrogen tribromide reacts with 3 moles of sodium hydroxide, then 40 mol of nitrogen tribromide will react with:

\(=\frac{3}{2}\times 40 mol=60 \text{mol of NaOH}\)

This means that in order to completely react with 40 moles of nitrogen tribromide we will need 60 moles of sodium hydroxide.

But according to the question we only have 48 moles of sodium hydroxide which is less than the 60 moles of sodium hydroxide which indicates that sodium hydroxide is present in a limited amount and nitrogen tribromide is present in an excess amount.

So, the limiting reagent is sodium hydroxide, hence the correct answer is the third option.

Filtration and evaporation are used to separate sand and salt mixture.

Separation of salt and sand mixture is as follows :-

In other words,  based on the fact that salt is soluble in water, while sand is not. So, you used the difference in solubility to separate a mixture of sand and salt.

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Answer: Filtration to collect the sand and distillation to collect the salt.

Explanation:

Half life, as stated, is a measurement of the rate at which radioactive material decays.

This process can be artificially produced by people, such as within a nuclear reactor, but can also occur spontaneously in nature. Depending on the particles or energy generated during the reaction, there are many kinds of radioactivity. Alpha particles, beta particles, and gamma rays are the three categories.

Average and half-life are two characteristics that may be used to describe the decay constant. Moments are used as the measuring unit in both scenarios. The average lifespan of such an element, as indicated by its name, may be expressed in the form of the following affirmation:

Nt=N₀ * e^(−λt).

The duration of time that is defined by how long it takes for half of a material to degrade is known as its half-life (both radioactive and non-radioactive elements). All through process of decay, its rate of decay is constant. It may be seen by:

Nt=N₀* (1/2)^(t/t₁₂).

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Answer:

If m or n is zero, the reaction is zero order in A or B, respectively, and the rate of the reaction is not affected by the concentration of that reactant. The overall reaction order is the sum of the orders with respect to each reactant. If m = 1 and n = 1, the overall order of the reaction is second order

(m + n = 1 + 1 = 2).

Explanation:

You would need roughly 202 ml of water to dissolve 72 grams of salt at 25 degrees Celsius.

The solubility of the compound, salt in water at 25 degrees Celsius is stated to be 357 grams per liter (g/L).

Then we can say that 357 grams of salt can be dissolved in 1 liter (1000 milliliters) of water.

To find out how much water you need to dissolve 72 grams of salt, solve the ratio as

357 g : 1000 mL = 72 g : x mL

Solving for x gives:

x = (72 g × 1000 mL) / 357 g

x = 201.681 mL

If we approximate this value it becomes 202ml

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Answer:

0.02

Explanation:

To solve this problem we use the Boyle's law equation

P1V1 = P2V2

P1 = 76mmHg

V1 = 0.2L

P2 = 760mmHg

V2 = unknown

Substituting values into the equation;

76mmHg * 0.2L = 760mmHg * v2

15.2 = 760V2

Divide through by 760 to get v2

15.2/760 = 0.02

So the gas will occupy a volume of 0.02 at 760mmHg

Answer:

A lightning

Explanation: