How many silicon atoms are there in 3 molecules of SiH4? please answer fast have to get this done in 10 mins please

Answer: Silver Fluoride + Ferric Carbonate = Ferric Fluoride + Silver Carbonate

Reaction Type

Double Displacement (Metathesis)

Reactants

Silver Fluoride - AgF

Argentous Fluoride Silver(I) Fluoride

Molar Mass of AgF Bond Polarity of AgF Oxidation State of AgF

Ferric Carbonate - Fe2(CO3)3

Molar Mass of C3Fe2O9 Oxidation State of C3Fe2O9

Products

Ferric Fluoride - FeF3

Molar Mass of F3Fe Oxidation State of F3Fe

Silver Carbonate - Ag2CO3

Silver(I) Carbonate

Molar Mass of CAg2O3 Oxidation State of CAg2O3

Explanation: did u understand that? if not pls contact me in the contacts ty

Answer:

1. Triprotic

2. H3BO3 -->  H+ + H2BO3- --> H+ + HBO3 2- --> H+ + BO3 3-

Answer:

scavenger or consumer

Explanation:

they collect and gather fruits, and different wild life

Answer:

B. The nonpolar substance has a lower boiling point than the polar substance

Explanation:

i just took the test review on edge 2020 and i got it right :)!! so sorry this answer is a little late ::

Among the given nonpolar molecules, CS2 (carbon disulfide) has the highest boiling point.

Boiling points of nonpolar molecules primarily depend on the strength of intermolecular forces, specifically London dispersion forces.

London dispersion forces occur due to temporary fluctuations in electron distribution, resulting in temporary dipoles that induce dipoles in neighboring molecules.

The strength of London dispersion forces is influenced by molecular size and shape.

Comparing the given nonpolar molecules:

C2H4 (ethylene) has a linear shape with relatively small molecular size.

CS2 (carbon disulfide) has a linear shape with a larger molecular size and more electrons compared to C2H4.

F2 (fluorine) is a diatomic molecule with the smallest molecular size.

N2O2 (dinitrogen dioxide) has a bent shape with a larger molecular size than F2.

Among these molecules, CS2 has the highest boiling point. The larger size and greater number of electrons in CS2 lead to stronger London dispersion forces compared to the other molecules.

This increased electron density allows for stronger temporary dipoles, resulting in more significant intermolecular attractions and a higher boiling point for CS2.

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The strongest base among the given compounds is d. 4-nitroaniline.

What are bases?

Bases are a substance that reacts with water to form hydroxide ions, which increase the pH of an aqueous solution. There are two types of bases: strong bases and weak bases.

Strong bases are bases that completely ionize to produce hydroxide ions when they are dissolved in water. A strong base has a high pH and can dissolve many substances. Examples of strong bases are sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2).

Weak bases are bases that only partially ionize when they are dissolved in water. A weak base has a lower pH than a strong base, and it cannot dissolve many substances. Ammonia (NH3), methylamine (CH3NH2), and aniline (C6H5NH2) are examples of weak bases.In this case, the strongest base among the given compounds is 4-nitroaniline (d).

It is the strongest base because it contains a strong electron-withdrawing group, which withdraws electrons from the nitrogen, making the nitrogen more nucleophilic. As a result, 4-nitroaniline is a stronger base than the other compounds given.

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Answer:

there are two atoms

1. hydrogen

2.and water

Answer:

\(\boxed {\boxed {\sf 6.26 \times 10^{24} \ atoms }}\)

Explanation:

To convert from moles to atoms, we must use a number called Avogadro's Number which is:

\(6.022\times10^{23}\)

This number tells us the amount of atoms in a mole.

\(1 \ mole = 6.022\times10^{23} \ atoms\)

To convert from moles to atoms, we must multiply Avogadro's number by the amount of moles.

We know there are 10.4 moles of Chlorine. Multiply 10.4 (molar amount) by 6.022 * 10²³ (Avogadro's Number)

\(10.4 \ mol *\frac{6.022\times10^{23} \ atoms }{ 1 \ mole}\)

\(10.4 * 6.022\times10^{23} \ atoms\)

\(1 \ mole = 6.022\times10^{23} \ atoms\)

\(6.26288 \times 10^{24} \ atoms\)

Let's round to 3 significant figures, because the original measurement 10.4, has 3 sig figs (1, 0, and 4)

For the number 6.26288, 3 significant figures is the hundredths place. The 2 in the thousandth place tells us to keep the 6 in the hundredths place.

\(6.26 \times 10^{24} \ atoms\)

There are about 6.26 × 10²⁴ atoms in 10.4 moles of chlorine.

Among the given weak bases, aniline is the weakest electrolyte in an aqueous solution.What is an electrolyte?An electrolyte is a substance that conducts electricity in an aqueous solution or in a molten state.

In water, they break up into ions and conduct electricity. Electrolytes may be categorized into two types: strong and weak electrolytes. Strong electrolytes dissociate completely into ions in aqueous solution, whereas weak electrolytes only partially dissociate into ions and exist in equilibrium with undissociated molecules. In the given weak bases, aniline is the weakest electrolyte.

Here's how to solve the problem: Aniline has a Kp of 4.0 × 10-10, which is the smallest value of Kp among all the given weak bases. Therefore, aniline is the weakest electrolyte in an aqueous solution.

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Answer:

An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons.

Explanation:

Composition of the Atom. The atom consists of a tiny nucleus surrounded by moving electrons. The nucleus contains protons, which have a positive charge equal in magnitude to the electron's negative charge. The nucleus may also contain neutrons, which have virtually the same mass but no charge. The nucleus has an overall positive charge as it contains protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. There are three subatomic particles: protons, neutrons, and electrons. Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge. I hope this helps you :)

A hypothesis, plan and design an experiment to determine whether substance A is an oxidizing agent may be substance A receives electrons in redox reactions, which is determined by observing the level of ATP in response to the presence of this substance across the inner mitochondrial membrane.

An oxidizing agent can be defined as any substance that receives electrons in an oxide reduction reaction, which can be verified as a step of cellular respiration to produce ATP.

Therefore, with this data, we can see that an oxidizing agent receives electrons and this can be determined in cellular respiration due to the production of ATP.

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Answer:

B and C

Explanation:

is it multiple choice question??

Van der Waals forces are the interaction between the molecules and the atoms. It increases with an increase in the molecular size and the number of electrons. Thus, options B and C are correct.

Van der Waals forces are the weak forces of attraction and repulsion present between the atoms and the molecules of the compounds. They are also called London Dispersion Forces and dipole-dipole forces.

An increase in the number of electrons and size of the molecule increases the surface area and the electron cloud which in turn, increases the Van der Waals force.

The intermolecular force increases as in large atoms or molecules the valence are held loosely as they are far from the nucleus or the center of the atom.

Therefore, the size and the electron increase the Van der Waals force.

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Answer

0.009 mol/L

Explanation

Given:

Mass of KCl = 0.66 g

Volume of water = 700 mL = 0.7 L

From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g

What to find:

The molarity of the solution

Step-by-step solution:

The formula to calculate molarity is:

The first step is to calculate the molar mass of KCl

KCl = Mass of 1 mol K + Mass of 1 mol Cl

KCl = 39.10 g + 35.453 g

KCl = 74.553 g

So the molar mass of KCl = 74.553 g/mol

The next step is to determine the number of moles of KCl in 0.66g of KCl:

Put the values of mole and volume into the molarity formula above to determine the molarity of the solution:

The molarity is 0.009 mol/L

If you are unsure which layer is which in an extraction procedure, there are a few steps you can take to try and identify them.

One approach is to carefully observe the physical properties of each layer, such as color, viscosity, and density. For example, the aqueous layer is typically clear or pale yellow in color, while the organic layer may be darker and more viscous.
You can also perform a simple test to determine which layer is which. One common method is to add a small amount of water to the mixture and observe which layer the water separates into. Since water is more polar than many organic solution, it will typically dissolve in the aqueous layer and not in the organic layer.
If you are still unsure which layer is which, you may need to consult a reference or an expert in the field to help you identify them. In any case, it is important to take care when working with extraction procedures, as improper identification of layers can result in loss of product or inaccurate analysis.

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Answer:

Explanation:

The graph shows the phase diagram of water . From it , it is clear that at 100°C water remains in equilibrium with water vapour and at this temperature , the vapour pressure is equal to one  atm . So this must be boiling point of water.

At 0.7 atm pressure , boiling point must have been reduced . So when water is at 100°C , it must have been completely in vapour phase .

Now the pressure is increased to 1.4 atm . In this process of increase of pressure , the water in vapour state must have turned into liquid state as soon as the pressure increases beyond  1 atm . Beyond it its boiling point would have increased above  100°C so it can not remain in gaseous phase . At 1.4 atm , its boiling point would have increased to 110°C or so . Hence it must be in liquid phase because its temperature is below its boiling point at that pressure .

Hence water changes from gaseous phase to liquid phase when pressure changes from 0.7atm to 1.4 atm .

Despite being buried at Stonehenge, the "Amesbury Archer" was most likely born in what is now Germany or Switzerland, according to strontium isotope analyses of his bones.

One of the most important details concerning the Archer, according to Wessex Archaeology, is that he was a native of the Alps. He most likely originated in what is now Switzerland. The peculiar Beaker pottery and artefacts that started to show up in Britain about the time of the Archer were known to archaeologists for a long time as being from Europe, providing evidence of trade and cultural ties.

The Archer, however, was more than only a dealer. He arrived with the essential metalworking abilities. The first metals were introduced to Britain at this time. He would have been among the first individuals in Britain to be able to work gold, which undoubtedly would have elevated him to a position of great status. Hence, his grave's wealth.

Hence, strontium isotope analysis report satisfactory result.

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Answer:

Enthalpy of solution is always Positive.

A double replacement reaction, also known as a double displacement reaction or a metathesis reaction, is a type of chemical reaction in which ions are exchanged between two compounds option(3).

In this reaction, the positive and negative ions of two compounds switch places, resulting in the formation of two new compounds.

The general form of a double replacement reaction is AB + CD → AD + CB, where A, B, C, and D represent elements or groups of elements. During the reaction, the cations of the compounds (positively charged ions) trade places, as do the anions (negatively charged ions). This exchange of ions leads to the formation of two new compounds, with the cation of one compound combining with the anion of the other compound.

Unlike single replacement reactions where a single element replaces another in a compound, double replacement reactions involve the exchange of ions. The reaction typically occurs in aqueous solutions or when compounds are dissolved in a solvent. However, double replacement reactions can also occur in other states, such as when two ionic compounds are in the solid state and react.

To summarize, a double replacement reaction involves the exchange of ions between two compounds, resulting in the formation of two new compounds. This reaction does not involve the loss of atoms or the exchange of electrons between individual atoms.

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The hydrogen carbonate ion, with the chemical formula HCO₃⁻, is an important species in chemistry and biochemistry. It consists of one hydrogen atom (H) bonded to a carbonate ion (CO₃²⁻).

The carbonate ion itself is a polyatomic ion composed of one carbon atom (C) and three oxygen atoms (O). The carbon atom is bonded to each oxygen atom through double bonds, resulting in a stable and planar structure.

When the hydrogen carbonate ion forms, it undergoes a chemical reaction where it gains an additional hydrogen ion (H⁺). This additional hydrogen ion is attracted to the carbonate ion, forming a new bond. The resulting ion, HCO₃⁻, carries a negative charge, indicating that it has gained an extra electron.

Hydrogen carbonate ions are present in various chemical and biological systems. They are found in solutions of carbonic acid (H₂CO₃), which can form when carbon dioxide dissolves in water. Hydrogen carbonate ions also play a crucial role in maintaining the acid-base balance in the blood and are involved in the transport of carbon dioxide in the bloodstream.

In summary, the formula for the hydrogen carbonate ion is HCO₃⁻. It consists of a hydrogen atom bonded to a carbonate ion and carries a negative charge due to the addition of an extra electron.

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Answer:

Sodium

Explanation:

Sodium has 11 protons. The Neutrons of an atom doesn't really matter if you already know the protons.

Answer:

i dont see the model bro

Explanation:

Answer:

The current model of the atom shows an atom that is mostly empty space. In the center is a small nucleus made of protons and neutrons.

Explanation:

When you turn the transmitter so that charges move in a east-west direction, the polarization of the resulting electromagnetic waves will change.

Polarization is the orientation of the electric field vector of an electromagnetic wave. In electromagnetic wave generated by north-south current in a wire, electric field vector will be oriented in an east-west direction. If the current in the wire is moving in east-west direction, the electric field vector of resulting electromagnetic wave will be oriented in a north-south direction.

So, if you change the direction of electric charges in the wire,  polarization of the resulting electromagnetic waves will change.

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COVID is a condition that occurs when individuals continue to have symptoms or develop new ones after recovering from COVID-19.

In addition to affecting human health, the presence of Long COVID can also have economic impacts, particularly on GDP growth, global imbalance, and inflation.

This essay will outline how Long COVID can affect the economy in both the short and long term.  Short-term impact of Long COVID on GDP growth, global imbalance, and inflation In the short term, Long COVID's presence is likely to have a negative impact on GDP growth.

In the immediate aftermath of a pandemic, many people may not have the confidence to return to work, travel, or participate in other activities. As a result, there may be a reduction in demand for goods and services, which can lead to a decrease in GDP growth.

In addition, businesses may face additional costs related to employee absenteeism and illness, which can further harm GDP growth. Long COVID can also lead to global imbalances, particularly in countries where the virus is prevalent.

For example, if a significant portion of a country's population is experiencing Long COVID, this can lead to a reduction in exports, as businesses may not be able to produce or deliver goods and services as efficiently.

This can lead to an increase in imports, which can contribute to a trade deficit and further harm the economy. Finally, Long COVID can lead to inflation in the short term, particularly if supply chains are disrupted.

As businesses face increased costs related to employee absenteeism and illness, they may need to increase prices to maintain profitability.

In addition, if supply chains are disrupted due to Long COVID, businesses may need to pay more for raw materials and other inputs, which can lead to an increase in prices. Long-term impact of Long COVID on GDP growth, global imbalance, and inflation In the long run, Long COVID's impact on the economy is less clear.

Some economists argue that the long-term impact of Long COVID on the economy will be minimal, particularly if effective treatments and vaccines are developed.

These individuals argue that the negative short-term impacts of Long COVID on the economy will be offset by increased spending in the future, as people resume normal activities.

Others argue that Long COVID's impact on the economy will be more significant, particularly if individuals continue to experience symptoms and are unable to return to work.

These individuals argue that Long COVID could lead to a reduction in human capital, as people may not be able to participate in the labor market as efficiently. This could lead to a reduction in productivity and harm GDP growth.

Similarly, Long COVID could contribute to global imbalances in the long term, particularly if it continues to be prevalent in certain countries. If a significant portion of the population is unable to participate in the labor market, this can lead to a reduction in exports and a trade deficit.

Finally, Long COVID could contribute to inflation in the long term, particularly if it leads to a reduction in productivity. If businesses are unable to produce goods and services as efficiently due to Long COVID, this can lead to an increase in prices over time.

In conclusion, the presence of Long COVID can have a significant impact on the economy in both the short and long term. While the short-term impact may be more significant, the long-term impact of Long COVID is still uncertain and will depend on a variety of factors, including the effectiveness of treatments and vaccines.

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Long Covid is when people have continued symptoms or health difficulties after recovering from Covid-19.

Long Covid* can affect GDP growth, global imbalances, and inflation in the short and long term.

Long Covid may hurt the economy temporarily. Long Covid can impair productivity and labour force participation. This can lower GDP and economic output. Long Covid treatment expenses can strain healthcare systems and raise inflationary pressures.

Countries with a higher prevalence of Long Covid may have a bigger load on their healthcare systems and workforce, which may aggravate economic inequities. Long Covid may worsen global inequities in countries with poor resources or healthcare facilities.

Long Covid has long-term effects. Long-term health issues can impair productivity and make returning to work difficult, lowering GDP growth. Long-term healthcare costs with Long Covid may increase government deficits and debt.

Long Covid may increase cost-push inflation. Healthcare costs, such as treatment and rehabilitation, can raise medical product and service prices. Inflationary pressures reduce consumers' purchasing power and corporate profitability, hurting the economy.

Long Covid can have complex impacts on GDP growth, global imbalances, and inflation in the short and long term. These implications will depend on Long Covid's severity and persistence, healthcare responses, and pandemic-related economic policy.

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For a metal crystallizes into a face-centered cubic unit cell and has a radius of 2.86 Angstrom, the density  is mathematically given as

d=3.31g/cm

Generally, the equation for the density  is mathematically given as

\(d=\frac{2*m}{NA*a^3}\\\\Therefore\\\\d=\frac{2*295.6mol}{6.022*10^23*(6.67*10^{-3})}\)

d=3.31g/cm

In conclusion, the density of this metal

d=3.31g/cm

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Answer:Nhóm gồm tất cả các kim loại tan trong axit sunfuric đặc nóng nhưng không tan trong axit sunfuric lo

Al, Cu, Au.

Al, Fe, Cr.

Ag, Fe, Pt.

Ag, Cu, Hg.

Explanation:

Answer: e

Explanation:

Answer:Double Replacement

Answer:

Explanation:

a) 202.4 g

b) 185.24 m

c) 0.13 dm

d) 6.91 L

e)0.0546 mol

f) 2.7 s

g) 42kg

h) 0

i) -0.11 g

j) -0.34 mL

Answer:

R = 40 ohms

Explanation:

Given that,

The voltage of outlet, V = 120 V

Current flowing through the device, I = 3 A

We need to find the Resistance rating of  the power cord. Let the resistance is R. We know that,

Ohm's law, V = IR

Put all the values,

\(R=\dfrac{V}{I}\\\\R=\dfrac{120}{3}\\\\R=40\ \Omega\)

So, the resistance rating of the power cord is equal to 40 ohms.

Answer:

10% because that is the answer

(b) electronegativity decreases left to right across the periodic table

Electronegativity increases from left to right in a period across the periodic table.

Electronegativity is a relative property that defines the tendency to attract shared pair of electrons. It is a unitless parameter that is calculated by different formulae.

Pauling scale is widely used to calculate the electronegativity values of a covalent bond. e.g. F = 4.0, Cl = 3.0, etc.

⇒Electron affinity decreases from top to bottom in the periodic table.

⇒Atomic radii decrease from left to right in the periodic table.

⇒Ionization energy decreases from top to bottom in the periodic table.