what total volume of gas forms if it is collected over water at a temperature of 25 ∘c and a total pressure of 757 mmhg ?

Answer:

8

Explanation:

Hope this helps you :)

Answer:

C. About 50 more grams ammonia would be able to dissolve as the solution has become unsaturated

Explanation:

From the question, we have;

The mass of ammonia dissolved in water = 60 grams

The mass of the water solvent which dissolves the ammonia = 100 g

The temperature to which the ammonia water solution is raised = 90°C

Therefore, given that the solubility of a solute in a solvent increases with temperature, when the temperature is raised, we have, that the solution will more unsaturated and will be able to dissolve more ammonia, therefore, option 'C' is the most correct option that corresponds with the relationship of temperature and solubility

Mass of Hydrogen = 3.7 g

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula  

180.2 g/mol of glucose-C₆H₁₂O₆ contains 72.1 grams of carbon, 96 g/mol of oxygen and the remainder is hydrogen

Remainder Hydrogen :

\(\tt 180-(72.1+96)=11.9~g/mol\)

% mass of Hidrogen in Gllucose :

\(\tt \dfrac{11.9}{180}\times 100\%=6.61\%\)

So mass of Hydrogen in 55.5 g Glucose :

\(\tt 6.61\%\times 55.5~g=3.7~g\)

The thermometer will read -10°C after about 2.43 minutes.

(a) After four more minutes, the thermometer will read -1°C.

This is because the temperature difference between the room and outdoors is (24 - (-11)) = 35°C.

The thermometer then rises 7°C in one minute, so the thermometer is heated at 7°C/minute, i.e. 35°C in five minutes.

So the temperature of the thermometer after 4 more minutes is 7°C + 7°C + 7°C + 7°C = 28°C, 28°C - 35°C = -7°C, -7°C - 3°C = -10°C.

Thus the reading on the thermometer will be -1°C after four more minutes.

(b) To find out when the thermometer will read -10°C, use the formula:

time = (temperature difference ÷ heating rate) + time to start

       = (-10°C - 7°C) ÷ 7°C/minute + 1 minute

       = -17°C ÷ 7°C/minute + 1 minute≈ -2.43 minutes

Thus, the thermometer will read -10°C after about 2.43 minutes.

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Yes, cations and anions are only found in ionic compounds.

An ionic compound is a type of chemical compound made up of cations (positively-charged ions) and anions (negatively-charged ions) held together by strong electrostatic forces called ionic bonds.Ions are the building blocks of ionic compounds, which are kept together by electrostatic forces.They are formed by the chemical bonding of a metal and a nonmetal. Ionic compounds are typically composed of positively charged cations (usually metals) and negatively charged anions (usually nonmetals). Examples of common ionic compounds include sodium chloride (NaCl), magnesium oxide (MgO), and calcium carbonate (CaCO3). An anion is an ion with a negative charge. Anions are formed when atoms gain electrons.A cation is an ion with a positive charge. Cations are formed when atoms lose electrons.

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Convection currents are the underlying cause of tectonic plate interactions that cause geological events, like earthquakes and volcanoes.

The tectonic plate interactions and processes that result in the construction of mountains and other landforms constitute the geological event that is taking place. Convection currents, which happen as molten rock rises from the Earth's mantle below the surface and then cools as it flows to the surface, are one of the primary processes generating this creation.

The plates move and interact with one another as a result of this process, which is fueled by the disparity in density between the hot and cold rock. Divergent boundaries, the kind of boundary at which this phenomenon occurs, are brought about by two plates moving apart.

The creation of the Himalayan Mountains is an illustration of this process. The Himalayas were created as a result of the Himalayan Plate colliding with the Eurasian Plate as it steadily moved north.

High peaks, deep valleys, and steep cliffs are some of the physical features that are visible as a result of this process. The highest mountain range in the world is the Himalayas, and Mount Everest is its highest peak.

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Aluminium is a natural material that is widely utilised in a variety of sectors and may be converted into a variety of synthetic goods via various chemical processes.

The following are some examples of synthetic compounds created from aluminium and the accompanying chemical processes:

Thus, these are only a few examples of synthetic goods generated from aluminium and the chemical processes that produce them.

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Your question seems incomplete, the probable complete question is:

What synthetic products are derived from the natural resource aluminum? What kind of chemical processes are used to create these synthetic products?

Answer:

Are you studying?..............

Explanation:

lol

Answer:

a) H2SO4 + 2KOH -> 2H2O + K2SO4

b) 9.809 ml

Explanation:

Number of Moles = Mass/ Molar Mass

Therefore: Mass = Number of moles * Molar Mass

--------------------------------------------

Molar mass of H2SO4:

H2= 2.02

S= 32.07

O4= 64

--------------------------------------------

H2SO4 has the molar mass of 98.09

--------------------------------------------

the Moles of H2SO4 is given to be 0.100M

Therefore:

Mass= 98.09*0.1

          = 9.809g

---------------------------------------------------

Assuming that 1 g= 1 ml, the volume of sulfuric acid is 9.809 ml.

The balanced equation for the reaction between aqueous zinc bromide (ZnBr₂) and solid aluminum (Al) to produce aqueous aluminum bromide (AlBr₃) and solid zinc (Zn) is:

3ZnBr₂ + 2Al -> 2AlBr₃ + 3Zn

In this reaction, three moles of zinc bromide (ZnBr₂ ) react with two moles of aluminum (Al) to yield two moles of aluminum bromide (AlBr₃) and three moles of zinc (Zn). The equation is balanced in terms of both mass and charge, ensuring that the number of atoms of each element is the same on both sides of the equation.

This reaction represents a single replacement or displacement reaction, where aluminum replaces zinc in the compound to form a new compound and release zinc as a solid product.

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Answer: B  N, neutral

Explanation: The central atom is the atom with the lowest electronegativity. Electronegativity increases up and to the right in relation to the periodic table. Therefore N is our central atom.

We calculate formal charge using the valence electron total minus the sum of the bonds plus the dots.

In this case N has 5 valence electrons, 3 bonds and 2 electron dots

5-(3+2)=0

N has a formal charge of 0

The central atom of nitrite (\(NO_2\)-) is nitrogen with a formal charge of 1-.

In the polyatomic ion nitrite (\(NO_2\)-), the central atom is nitrogen (N) which is bonded to two oxygen (O) atoms through double bonds.

The formal charge of the central atom can be calculated using the formula:

Formal charge = Valence electrons - (number of lone pair electrons + 1/2 x number of bonding electrons)

For nitrogen in nitrite, the formal charge is 1- because it has five valence electrons and it is bonded to only three electrons (two from the double bond with each oxygen atom and one electron from a single bond with the other oxygen atom).

Therefore, the answer is option A, which is N with a formal charge of 1+.

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Nemotin is a diterpenoid natural substance with a carbocyclic ring system as its main structural component.

Analyzing the bonding configurations of the carbon atoms in nemotin allows one to assess the degree of hybridization.

Usually, sp hybridization occurs between carbon atoms that are bound to one or two other atoms and form a linear or angular shape. Typically, sp3 hybridization occurs in tetrahedral structures made of three bonded carbon atoms. Typically, sp2 hybridization occurs when four carbon atoms are linked together to form a trigonal planar or tetrahedral structure.

Since the carbons in the carbocyclic ring structure of nemotin are connected to four other atoms and arrange themselves in a planar manner, they are most likely sp2 hybridized. Depending on their bonding configurations, the carbons on the side chains connected to the ring system may be either sp3 or sp2 hybridized.

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Answer:

Krypton has 4 orbital shells

Extra Information:

Krypton has 36 electrons which are arranged in these 4 orbit shells,

The order in which electrons are arranged in these shells is 2,8,18,8

The triple point can be seen from the graph that has been attached here.

The triple point is a special combination of temperature and pressure where the equilibrium of a substance's three phases—solid, liquid, and gas—occurs. The transition between phases happens with no discernible net change in the substance because the solid, liquid, and gas phases are in perfect equilibrium at the triple point.

A crucial reference point in thermodynamics, the triple point is frequently used to specify temperature scales and calibrate thermometers. Each substance has a specified value for temperature and pressure.

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The ideal fertilizer formula for building strong roots and promoting flower growth would typically have a higher phosphorus (P) content relative to nitrogen (N) and potassium (K). Phosphorus is essential for root development and flower formation.

Among the options provided, the fertilizer formula that would be most suitable for these purposes is 5-20-5.

In the 5-20-5 fertilizer formula, the numbers represent the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer, respectively. The higher phosphorus content in the 5-20-5 formula (20%) is beneficial for promoting root growth and enhancing flower production.

Nitrogen (5%) supports overall plant growth and leaf development, while potassium (5%) helps with various plant functions, including disease resistance and overall plant health.

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B. The major source of sulfur dioxides is fuel combustion, such as burning coal and oil in power plants and other industrial processes.

The fundamental chemical process of releasing energy from a fuel and air combination is combustion, sometimes referred to as burning. While natural erosion of soils can release small amounts of sulfur dioxide, it is not a significant contributor to the levels we see in the atmosphere. Industrial processing, such as refining metals and producing chemicals, can also release sulfur dioxide, but to a lesser extent than fuel combustion. Road traffic can contribute to air pollution, but sulfur dioxide emissions from cars and trucks are generally lower than those from industrial sources.

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The ionic equation:

2Mn\(O^{- }_{4}\) + 5 H2O4 + 6 \(H^{+}\)⇄  2\(Mn^{2+}\) + 10 CO2 + 8H2O

Molarity of KMnO4 is 0.0229M

Molarity:

Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of the amount of substance per unit volume of solution.

Formation of  the ionic equation:

2 × ( Mn\(O^{-}\)4)  + 8 \(H^{+}\) + 5\(e^{-}\) ⇄ \(Mn^{2+}\)  + 4 H2O )

5 × ( H2C2O4  ⇄ 2CO2  + 2\(H^{+}\)  + 2\(e^{-}\) )

_______________________________________

2Mn\(O^{-} _{4}\)  + 5 H2C2O4  + 6\(H^{+}\) ⇄ 2M\(n^{2+}\) + 10 CO2 + 8 H2O

Now we have to find the molarity of the permanganate,

Volume = 28.97ml

mass = 0.1058g

molecular mass = 0.105 × 1000/ 28.97

                          = 3.62g

molecular mass = 158

Molarity of the solution = mass/ molecular mass

                                       = 3.62/ 158

                                       = 0.0229M

Therefore the ionic equation is 2Mn\(O^{- }_{4}\) + 5 H2O4 + 6 \(H^{+}\)⇄  2\(Mn^{2+}\) + 10 CO2 + 8H2O and the molarity of the permanganate solution is 0.0229M.

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A gas is confined in a rectangular tank 25.0 cm long, 8.0 cm high, and 10.4 cm wide. If the density of the gas is 19.3 g/L.

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass).

The density of a pure substance is equal to its mass concentration in numbers. Density varies widely among materials and may be important in relation to packaging, purity, and buoyancy. The densest known elements under conditions of normal temperature and pressure are osmium and iridium.

It is occasionally substituted by the dimensionless quantity "relative density" or "specific gravity," which is the ratio of the density of the material to that of a standard material, typically water, to make density comparisons across different systems of units easier.

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Ethanol is produced when ethane and ethene react with water and a catalyst like sulfuric acid. Adding concentrated sulfuric acid to hot ethanol (acts as a catalyst).

To eliminate carbon dioxide and sulphur dioxide that are created as byproducts, the gases are passed through a sodium hydroxide solution. The main product that is gathered over water is ethene. As a result, dehydration of ethanol produces ethene rather than ethane. The names Mattling acid and Oil of Vitriol are other names for sulfuric acid. It is highly caustic and acidic in nature. It dehydrates and oxidises when  present in higher amounts. It is a clear, syrup-like liquid with no colour or smell. A substance having the chemical formula C 2H 6, ethane is an organic chemical.

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Answer:

50.6

Explanation

using the furmla

mole=mass/mole mass

1012/20=50.6

Answer:

The correct option is;

Group 12

Explanation:

A metallic element that is shiny and silver colored that can exist in the +1 and +2 ionic states and  which forms a bright red compound with sulfur is mercury, Hg

The compound formed between mercury and silver is one of the earliest synthetic compound also known as vermilion and cinnabar. The bright red pigment of the HgS is used widely and is one of the most favorite pigment found in medieval European outstanding works of arts and in Chinese decorated wares made of lacquer as well as in mesoAmerica.

Answer:

12

Explanation:

Answer:

175 meters

Explanation:

As it's velocity is 35m/s

so,

by formula

35 *5

175 meters

Answer:

The closer the transition state to the product, the more stable it is. It is because this transition state is closest to the final form of the product, which is usually stable

Answer:

there are about 26.67 milligrams in 10 mL.

Explanation:

To find the number of milligrams in 10 mL, you can use the proportion:

(8 mg) / (3 mL) = (x mg) / (10 mL)

Where x is the number of milligrams in 10 mL. To solve for x, you can cross-multiply and divide:

(8 mg) * (10 mL) = (3 mL) * (x mg)

x = (8 mg) * (10 mL) / (3 mL)

x = 26.666.. mg

The element present in the third period and seventeenth group of the periodic table is chlorine (Cl).

Here is a step-by-step explanation:
1. Periods in the periodic table represent the number of electron shells or energy levels an atom has.
2. The third period corresponds to the third electron shell.
3. Groups in the periodic table represent the number of valence electrons an atom has.
4. The seventeenth group, also known as Group 17 or Group VIIA, is the halogens group.
5. Elements in the halogens group have 7 valence electrons.
6. Chlorine (Cl) is located in the seventeenth group, and it has 7 valence electrons.
7. Therefore, chlorine (Cl) is the element present in the third period and seventeenth group.

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To determine the empirical formula, we need to find the simplest whole number ratio between the elements present in the compound.

Given the percentages:

Aluminum (Al) = 35.98%

Sulfur (S) = 64.02%

Step 1: Convert the percentages to grams.

Assuming we have 100 grams of the compound:

Aluminum (Al) = 35.98 grams

Sulfur (S) = 64.02 grams

Step 2: Convert the grams to moles using the molar mass.

The molar mass of aluminum (Al) is 26.98 g/mol.

The molar mass of sulfur (S) is 32.06 g/mol.

Moles of Aluminum (Al) = 35.98 g / 26.98 g/mol ≈ 1.333 moles

Moles of Sulfur (S) = 64.02 g / 32.06 g/mol ≈ 1.997 moles

Step 3: Divide the moles of each element by the smallest number of moles to obtain the simplest whole number ratio.

Dividing both moles by 1.333 (the smallest number of moles), we get:

Moles of Aluminum (Al) ≈ 1 mole

Moles of Sulfur (S) ≈ 1.5 moles

Therefore, the empirical formula is AlS1.5, which can be simplified to Al2S3 by multiplying all subscripts by 2.

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The initial pH of pure water is 7.0, and after adding 0.028 mol of NaOH to 280.0 ml of water, the final pH is approximately 13.0 due to an increase in hydroxide ion concentration.

The initial pH of pure water is 7.0, as it is considered neutral. After adding 0.028 mol of NaOH to 280.0 ml of pure water, the final pH can be calculated.

Pure water has a neutral pH of 7.0, which means it has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-). When NaOH is added to water, it dissociates into Na+ and OH- ions. The OH- ions react with the H+ ions in the water, resulting in an increase in the concentration of hydroxide ions and a decrease in the concentration of hydrogen ions.

To calculate the final pH, we need to determine the concentration of OH- ions after the addition of NaOH. Since 0.028 mol of NaOH is added to 280.0 ml of water, the concentration of OH- ions can be calculated using the molarity formula:

Molarity = Moles of solute / Volume of solution (in liters)

Converting the volume of water to liters (280.0 ml = 0.280 L), we can calculate the molarity of the OH- ions:

Molarity of OH- = (0.028 mol) / (0.280 L) = 0.10 M

The concentration of OH- ions corresponds to the pOH value, which is the negative logarithm (base 10) of the hydroxide ion concentration:

pOH = -log [OH-] = -log (0.10) ≈ 1.0

Since pH + pOH = 14 (for neutral solutions), the final pH can be calculated:

pH = 14 - pOH = 14 - 1.0 = 13.0

Therefore, the final pH after adding 0.028 mol of NaOH to 280.0 ml of pure water is approximately 13.0.

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