on-metals in group 17 on the periodic table most commonly form which type of ion?

Answer:

fsdafdsafdsafdsafdasfsagfd

Explanation:

The number of valence electrons for neutral atoms is the same as the number of the atom's main group. A periodic table element's column can be used to determine its main group number. For instance, carbon, which belongs to group 4, has four valence electrons.

For an atom to become a charged ion and create an ionic connection with another atom, it must have between one and three valence electrons, which it will lose.

Atoms can be very reactive or extremely inactive depending on how many valence electrons they have. The quantity of valence electrons in an atom also affects whether or not it is more likely to lose or acquire electrons during chemical processes. Metals may carry electricity because they readily give away electrons.

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Answer:

22

Explanation:

when a cell goes through mitosis, it duplicates the amount of its subcellular structures, so it will create 2 more clones. So before it was 20, but one goes through mitosis and preduces two more daughter cells, meaning 22.

Answer:

22

Explanation:

its 22

The difference between 8.1456 - 5.12 will be 3.0256 and rounding it off will give 3.

It should be noted that the information given is that we should subtract 5.12 from 8.1456.

It should be noted that subtraction is used when we want to deduct a number from another number. It is taking away a number form another one.

In this case, we will take away 5.12 from 8.1456. This will give the difference between the numbers.

Therefore, 8.1456 - 5.12 = 3.0256

Therefore, the difference is 3.0256 and rounding it appropriately will give a value of 3.

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Answer:

Approximately \(1.92\).

Explanation:

The \({\rm pH}\) of a solution is the opposite of the base-\(10\) logarithm of that solution's \({\rm H^{+}}\) concentration measured in \({\rm mol \cdot L^{-1}}\). In other words:

\({\rm pH} = - \log_{10} ([{\rm H^{+}])\).

Using properties of logarithms:

\(\begin{aligned}{\rm pH} &= - \log_{10} ([{\rm H^{+}]) \\ &= -\left(\frac{\ln([{\rm H^{+}]})}{\ln(10)}\right)\end{aligned}\).

In this question, \([{\rm H^{+}}] = 1.2 \times 10^{-2}\; {\rm mol \cdot L^{-1}}\). Therefore:

\(\begin{aligned}{\rm pH} &= - \log_{10} ([{\rm H^{+}]) \\ &= -\left(\frac{\ln([{\rm H^{+}]})}{\ln(10)}\right) \\ &= - \frac{\ln(1.2 \times 10^{-2})}{\ln(10)} \\ &\approx 1.92\end{aligned}\).

By convention, the number of decimal values in the \({\rm pH}\) should be equal to the number of significant figures in the \({\rm H^{+}}\) concentration of the solution.

In this question, there are two significant figures in the measurement\([{\rm H^{+}}] = 1.2 \times 10^{-2}\; {\rm mol \cdot L^{-1}}\). Thus, the \({\rm pH}\) result should be rounded to two decimal places.

To obtain the required 40% alcohol solution, you need to add 105 ml of the 95% alcohol mixture.

Let's denote the amount of 95% alcohol mixture that we need to add as "x". To obtain a 40% alcohol solution, we need to use the following equation, based on the principle of the concentration of the solution:

(0.05)(165 ml) + (0.95)(x ml) = (0.40)(165 ml + x ml)

where the left-hand side represents the total amount of alcohol in the resulting solution, and the right-hand side represents the desired concentration of alcohol in the resulting solution.

Now, we can solve for "x" by first distributing the 0.40 factor:

0.05(165 ml) + 0.95x = 0.40(165 ml) + 0.40x

Next, we can simplify and isolate the "x" term:

8.25 + 0.95x = 66 + 0.40x

0.55x = 57.75

x = 105 ml (rounded to the nearest ml)

Therefore, we need to add 105 ml of the 95% alcohol mixture to obtain a 40% alcohol solution.

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Answer:

cubic centimeters is the answer

Answer:Cubic centimeters

Explanation:

The creation of an appropriate atomic-scale model, from which we may extract data on electrical characteristics or specific chemical variables, such as reaction energies and activation barriers, is essential to this strategy.

One of the main topics of study in the discipline of solid state physics is the modelling of bulk materials and surfaces at the atomic scale.

Ab initio calculations are anticipated to shed further light on the energy associated with atomic movements, electronic exchanges, and other yet more sophisticated systems.

Thus,The atomic number is the number of protons in the nucleus of an atom. The number of protons defines the individuality of an element.

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a) The explosiveness of hydrogen gas is a chemical property.

b) The bronze color of copper is a physical property.

c) The shiny appearance of silver is a physical property.

d) The ability of dry ice to sublime (change from solid directly to vapor) is a physical property.

Chemical properties are properties that describe the behavior of a substance during a chemical reaction or a chemical change. Explosiveness of hydrogen gas is an example of a chemical property because it describes how hydrogen gas reacts with oxygen to form water and how the reaction releases a large amount of energy in the form of an explosion.

Physical properties, on the other hand, are properties that describe the characteristics of a substance that can be observed or measured without changing the composition of the substance. Examples of physical properties include the color, texture, and melting point of a substance. The bronze color of copper and the shiny appearance of silver are both examples of physical properties.

The ability of dry ice to sublime (change from solid directly to vapor) is also a physical property because it describes a physical change that occurs when dry ice is heated or exposed to high pressure.

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Answer:

Number of moles = 0.33 mol

Explanation:

Given data:

Mass of C₂H₆O = 15.2 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of 46.07 g/mol

by putting values,

Number of moles = 15.2 g/ 46.07 g/mol

Number of moles = 0.33 mol

Magnesium oxide : MgO

Calcium bicarbonate:  Ca(HCO3)2

aluminum carbonate: Al2(CO3)3 or C3Al2O9

Answer:

71.92 kPa

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (kPa)

P2 = final pressure (kPa)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

T1 = 50°C = 50 + 273 = 323K

V1 = 105L

T2 = -25°C = -25 + 273 = 248K

P2 = 105.4 kPa

P1 = ?

V2 = 55.0 L

Using P1V1/T1 = P2V2/T2

P1 × 105/323 = 105.4 × 55/248

105P1/323 = 5797/248

0.325P1 = 23.375

P1 = 23.375 ÷ 0.325

P1 = 71.92 kPa

Answer:

Fluorine has seven electrons in 2p-subshell whereas chlorine has seven electrons in its 3p-subshell. 3p-subshell is relatively larger than 2p-subshell. Therefore, repulsion among the electrons will be more in the 2p-shell of fluorine than 3p-subshell in chlorine.  Due to the smaller size and thus, the greater electron-electron repulsions, fluorine will not accept an incoming electron with the same as chlorine.

Answer:

Hope it'll clear your doubt

Explanation:

example

like in Po4³- one coordinate bond formation occurs coz Phosphorus has valency of 3 and can form 3 bonds when extra electrons on Oxygen atom forms bonds with Phosphorus....those 3 bonds are covalent but.....phosphorus has 5 valence electrons in valence shell so it has already formed 3 bond with Oxygen atoms....now remaining two electrons of P forms coordinate bond with Oxygen

Answer: a full s and a full p sublevel

Explanation: "noble gases. They are an especially important group of the periodic table because they are almost completely unreactive, due to their completely filled outermost s and p sublevels."

The daily maximum of just sodium (Na) should be = 6000 mg

The adult's daily maximum intake of salt = 6g

The major element of salt that causes health concerns is sodium (Na).

Therefore the quantity of sodium consumed in milligrammes= 6×1000

= 6000 mg

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Answer:

2.05g

Explanation:

The weight of butane gas present in the system with the specified temperature and pressure is 2.05 g. We can use ideal gas law here.

Ideal gas law states the relation between temperature, pressure and volume  and mathematically written as below:

PV = nRT

Here, P and V be the pressure and volume and n be the no.of moles and R be the universal  gas constant. T is the absolute temperature in kelvin.

The system have a volume of 3000 mL or 3 L and pressure of 760 torr and temperature of 1000 K. The no. of moles n is the ratio of taken weight to the molar mass. R has the value 62.36 L torr/(K mol)

Apply these values into ideal gas law as given below:

(3 L × 760 torr)  = (w/56.1 g/mol) × 62.36 L torr/(K mol) × 1000 K. From this,

\(2280 \textup{ torr L} = \frac{w}{56.1 g/mol} \times 62360 \textup{ L torr/mol}\)

\(w = \frac{2280\textup{ torr L}\times 56.1\textup{ g/mol}}{62360 \textup{ L torr/mol}} =2.05 g\)

Therefore, the amount of butane gas for the given system is 2.05 g.

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Massachusetts is abbreviated as MA, not MS. The northeastern part of the United States is home to the state of Massachusetts. Boston is the city's capital.

In chemistry, a state refers to the physical or chemical condition of a substance or system, including its temperature, pressure, phase, and composition. The state of a substance can have a significant impact on its properties and behavior. For example, changing the state of a substance from a solid to a liquid can affect its density, viscosity, and thermal conductivity. The different states of matter, including solid, liquid, and gas, are also associated with different intermolecular forces, which can affect the behavior of substances. Understanding the state of a substance is essential for many areas of chemistry, including thermodynamics, phase transitions, and chemical reactions. State variables, such as temperature, pressure, and entropy, are often used to describe and quantify the state of a substance or system.

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A variety of equipment created especially for this purpose by Balcon Engineering makes it simple to empty and dispose of vials, ampoules, and small bottles in a safe and cost-effective manner.

What are snap cap vials?

Snap Cap Vials are the best containers for storing live insects temporarily. These plastic snap cap vials include a white snap-tight cap to protect your specimens and are composed of sturdy polystyrene plastic. These vials made of clear plastic are useful for both lab and field work. The Ecology Supplies aspirator uses this vial. When using an aspirator to collect a lot of specimens or numerous distinct species, extra tubes come in handy. Although they are temporarily compatible with alcohol, they are not "sealable" and will leak if they are tilted. Ethyl acetate cannot be combined with them. We currently have 3 sizes available, ranging from 5 dram to 12 drams, but we will also provide other sizes upon request. 10 packs of vials are offered for sale.

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Al₂(SO₄)₃

= 2.Al+3.S+12.O

= 2.27 + 3.32+12.16

= 54+96+192

=342 g/mol

Answer:

The correct answer is X.

Explanation:

Lysosomes are heterogeneous structures present in animal cells which are bound by single membranes. They are of varying shape and size and contains hydrolytic enzymes inside it.

Lysosomal membrane has H⁺ ATPase which pumps H⁺ into the membrane through ATP hydrolysis. This pumping of H⁺ makes the internal pH of lysosome acidic.

Lysosome contains many hydrolytic enzymes like protease, lipase, nuclease, therefore, lysosome protects the cell from pathogens by engulfing it and hydrolyze it by its hydrolytic enzymes.

The process by which substance comes from outside cell and broken down through lysosome is called heterophagy.

Answer:

yes they carry charges

Answer:

The short general principle of solubility states that "like dissolves like." Solvents that have similar polarity or charge to the solute tend to dissolve it more readily.

Solubility is the ability of a substance to dissolve based on chemical nature, intermolecular forces, and "like dissolves like" principle. Factors like particle size, temperature, and pressure affect solubility. It is expressed as the maximum amount of solute that can dissolve in a solvent.

Answer:

D. an orbital notation of the atom

Explanation:

i took the test

The empirical formula for a compound that contains 0.0134 grams of Iron, 0.00769 grams of Sulfur, and 0.0115 grams of Oxygen is FeSO3.

Convert the given masses of each element to moles using their molar masses:

Molar mass of Fe = 55.845 g/mol

Molar mass of S = 32.06 g/mol

Molar mass of O = 15.999 g/mol

Moles of Fe = 0.0134 g / 55.845 g/mol = 0.00024 mol

Moles of S = 0.00769 g / 32.06 g/mol = 0.00024 mol

Moles of O = 0.0115 g / 15.999 g/mol = 0.00072 mol

Calculate the mole ratio of the elements in the compound by dividing the number of moles of each element by the smallest number of moles:

Moles of Fe = 0.00024 mol / 0.00024 mol = 1

Moles of S = 0.00024 mol / 0.00024 mol = 1

Moles of O = 0.00072 mol / 0.00024 mol = 3

The empirical formula of the compound is FeSO3, indicating that the compound contains one atom of Fe, one atom of S, and three atoms of O.

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Answer:

In natural selection, organisms adapt to the environment to best suit nature's needs to survive. In selective breeding, it's as if nature were humans and the humans can choose which organisms can survive and die. They do it so they can develop organisms with desirable characteristics.

The correct statement is that the concentrated aqueous ammonia solution will cause the formation of the copper(II) tetraammine complex by displacing water molecules.

When concentrated aqueous ammonia solution is added to dilute aqueous copper(II) sulfate solution, the following reaction occurs:

CuSO₄(aq) + 4NH₃(aq) → [Cu(NH₃)₄(H₂O)n]²⁺(aq) + SO₄²⁻(aq)

In this reaction, ammonia (NH₃) acts as a ligand and forms a complex with the copper ion (Cu²⁺). The resulting complex is called a copper(II) tetraammine complex, [Cu(NH₃)₄(H₂O)n]²⁺, where n represents the number of water molecules attached to the complex.

Ammonia is a stronger ligand than water, meaning it has a higher affinity for forming complexes with metal ions. When concentrated aqueous ammonia is added to the copper(II) sulfate solution, ammonia displaces water molecules from the coordination sphere of the copper ion and forms the copper(II) tetraammine complex.

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We are given:

Volume = 2 L

pH = 2.75

Finding the concentration required:

we know that pH is just the negative log of the hydrogen ion concentration

pH = -log[H⁺]

we are given that the pH is 2.75

2.75 = -log[H⁺]

log[H⁺] = -2.75                         [multiplying both sides by -1]

\(10^{log[H]} = 10^{-2.75}\)                      

[H⁺] = 1.78 * 10⁻³ Molar

Number of moles of Hydrogen ions:

[H⁺] = 1.78 * 10⁻³ Molar

which means that there are 1.78 * 10⁻³ moles of hydrogen ions in 1 liter solution

1.78 * 10⁻³ moles / L

multiplying and dividing by 2, we get:

3.56 * 10⁻³ moles / 2 L

Hence we need 3.56 * 10⁻³ moles of hydrogen ions  

Answer:

3.556x 10^-3mol

Explanation:

Using pH =-log [ H+], we can calculate the concentration of the hydrogen Ions.

pH =-log [ H+], pH = 2.75

2.75 = -log[H+], taking antilog of both sides

10^ — 2.75 = [H+]

[H+] =1. 778 x 10^-3M

Now that we have the concentration and also knows the volume, we can use the relation

Moles = concentration X volume

= 1. 778 x 10^-3M x 2L = 3.56x 10^-3mol

The moles of the hydrogen Ions is 3.56x 10^-3mol

The mass of aluminum needed to completely react with 3.83 mol of hydrochloric acid is approximately 34.44 grams.

To determine the mass of aluminum needed to react with 3.83 mol of hydrochloric acid, we need to use the stoichiometry of the balanced equation.

From the balanced equation: 2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g)

We can see that the mole ratio between aluminum (Al) and hydrochloric acid (HCl) is 2:6, or simplified, 1:3. This means that for every 1 mole of aluminum, we need 3 moles of hydrochloric acid.

Given that we have 3.83 mol of hydrochloric acid, we can set up the following proportion:

1 mol Al / 3 mol HCl = x mol Al / 3.83 mol HCl

Simplifying the proportion, we find:

x = (1 mol Al / 3 mol HCl) * 3.83 mol HCl

x = 1.277 mol Al

Now, we need to calculate the mass of aluminum using its molar mass. The molar mass of aluminum is approximately 26.98 g/mol.

Mass of aluminum = 1.277 mol Al * 26.98 g/mol Al

Mass of aluminum = 34.44 g

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Answer:

it takes about an hour

Explanation:

On average, it takes about an hour for a person to metabolize around 14 grams of pure ethanol—the amount of alcohol contained in one standard drink—which amounts to roughly 12 ounces of 5% ABV beer, 5 ounces of wine, or 1.5 ounces of 80 proof liquor.

Several factors influence the rate at which alcohol is absorbed into the bloodstream. For example, food in the stomach slows gastric emptying and alcohol absorption.