branches of sicence​

Answer:

yes its c

Explanation:

Hydrogen is formed at the negative electrode (cathode) and oxygen at the positive electrode (anode) and the concentration of sulfuric acid increases.

Direct electric current is used in the electrolysis process to accelerate chemical reactions that would not naturally occur.

It can be seen that as the electrolysis proceeds the dilute sulfuric acid gets slightly more concentrated as only water is removed from the electrolyte as hydrogen and oxygen.

The ions present in the dilute acid are H+(aq), OH–(aq) and SO4 2–(aq).

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suggest an explanation of why the concentration of the sulfuric acid increases during electrolyis

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Answer:

Actual yield is 38.57

Explanation:

Percentage yield = Actual yield / theoretical yield X 100

Percent yield x theoretical yield / 100 = actual yield

Write the balanced chemical equation:

2Na + CI2 = 2NaCI

Given is 17.25 g Sodium metal (limiting reactant) with excess being chlorine gas

Percent yield is 88%

Mole of Na = 17.25 g / 22.98 = 0.750

Calculate the Theoretical Yield to solve for Actual Yield

Theoretical yield = 0.75 x molar mass of NaCI

Theoretical yield = 0.75 x 58.44 = 43.83 g

When plugged into the original percentage yield formula:

Actual yield = 88 x 43.83 / 100 = 38.57 g

Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

Thus, They are additionally known as limiting reactants or limiting agents. A predetermined quantity of reactants are necessary for the reaction to be completed, according to the stoichiometry of chemical reactions.

In the aforementioned reaction, 2 moles of ammonia are created when 3 moles of hydrogen gas react with 1 mole of nitrogen gas.

In most cases, this reactant dictates when the reaction will end. The reaction stoichiometry can be used to determine the precise quantity of reactant that will be required to react with another element. The limiting agent is determined by the mole ratio rather than the mass of the reactants.

Thus, Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

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A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Answer

The matching is numbered and represented in red arrowsi n the diagram below:

Explanation

In a steam turbine electricity generation, the mechanical energy in form of pressure present in steam is extracted and converted into kinetic energy by allowing the steam to flow through the stationary blades. This kinetic energy is transmitted to the moving blades connected to the alternator of a steam turbine generator.

The matching of the process is shown below:

When pyridine (C5H5N) acts as a base in water, it accepts a proton (H+) from water, forming its conjugate acid, pyridinium ion (C5H5NH+), and a hydroxide ion (OH-). The balanced chemical equation for this reaction is:

C5H5N + H2O ⇌ C5H5NH+ + OH-
The equilibrium constant expression for this reaction, known as the base ionization constant (Kb), can be written as:
Kb = [C5H5NH+][OH-] / [C5H5N]
In this expression, the concentrations of the products (C5H5NH+ and OH-) are multiplied together and divided by the concentration of the reactant (C5H5N). The concentration of water is not included in the Kb expression because it is a pure liquid and its concentration remains constant during the reaction.

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Answer:

C) Conservation of matter.

Explanation:

Stoichiometry is based on conservation of matter, that is, matter cannot be created or destroyed, it only changes, that's why a balanced chemical reaction has the same amount of each element in each side of the reaction (on the reactants side and on the products side).

The equilibrium expression of the given chemical equation Kc =

\(\frac{(CaCO_{3} ) (H_{2} )^{4} }{(CaO) (CH_{4} ) (H_{2} O)^{2} }\)

Equilibrium expression of a chemical equation is defined as the equations equilibrium constant which is the rate constant for the forward reaction divided by the rate constant for the reverse reaction.

The equilibrium expression (Kc)of a chemical equation can be written using the following formula:

KC= [C] [D].../[A] [B] ...

Therefore to show the equilibrium expression of the following equation:

Kc = \(CaO + CH_{4} + 2H_{2} O --- > CaCO_{3} + 4H_{2}\)

kc = \(\frac{(CaCO_{3} ) (H_{2} )^{4} }{(CaO) (CH_{4} ) (H_{2} O)^{2} }\)

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Answer:

Mass = 0.697 g

Explanation:

Given data:

Volume of hydrogen = 1.36 L

Mass of ammonia produced = ?

Temperature = standard = 273.15 K

Pressure = standard = 1 atm

Solution:

Chemical equation:

3H₂ + N₂       →      2NH₃

First of all we will calculate the number of moles of hydrogen:

PV  = nRT

R = general gas constant = 0.0821 atm.L/mol.K

1atm ×1.36 L = n × 0.0821 atm.L/mol.K × 273.15 K

1.36 atm.L = n × 22.43 atm.L/mol

n = 1.36 atm.L / 22.43 atm.L/mol

n = 0.061 mol

Now we will compare the moles of hydrogen and ammonia:

                 H₂         :          NH₃

                  3          :            2

                0.061     :         2/3×0.061 = 0.041

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 0.041 mol × 17 g/mol

Mass = 0.697 g

Answer:

Signal noise will reduce the information in the transmitted signal.

Explanation:

Signal noise is the most likely factor that will reduce the information in a transmitted signal because:

In an ecosystem, the  impact of soil Science to the development of Ghana's agriculture is that it provides suitable conditions for root germination and growth.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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​

Answer:

Neutrons and protons

Explanation:

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

Answer:

Explanation:Two pre-requisite skills needed for students to learn the process of writing balanced chemical and ionic equations are:

1. Understanding of the periodic table and elements: Students must have a solid foundation in the periodic table, including recognizing elements by their symbols and understanding their properties, groups, and electron configurations.

2. Knowledge of chemical bonding and compound formation: Students should be familiar with the different types of chemical bonds (ionic, covalent, and metallic) and know how to construct chemical formulas for compounds based on their component elements and valence electrons.

Answer: The kinetic energy of an object depends on both its mass and its speed. Kinetic energy increased as mass and speed are increased

Explanation: Google lol

Answer:

Destroyed.

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. 

The percent by mass of sulfur is  20.1%.

Here, we need to find the percent by mass of the sulfur atom and we have to do that by first obtaining the molar mass of the compound as we can see it from the question.

Hence;

Molar mass of the compound = 63.55 + 32.07 + 4( 16.00 )

=  63.55 + 32.07 + 64

= 159.62

We now have to find the percent by mas of sulfur;

32.07/159.62  * 100

= 20.1%

The compound contains 20.1% of sulfur by mass of the compound as shown in the calculation.

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The IUPAC name of the given alkane compound is 2-methyl heptane.

IUPAC stands for the International Union of Pure and Applied Chemistry. It is an international scientific organization that is responsible for developing and standardizing the nomenclature, terminology, and methods used in the field of chemistry.

Given to us is the structure of the alkane, and we need to find the IUPAC name of the alkane:

CH3-CH(CH3)-CH₂-CH₂-CH₂-CH₂CH3

The given compound is of 7 carbon chain with one methyl group.

So, the name of the compound is 2-methyl heptane.

Hence, the name of the compound is 2-methyl heptane.

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Answer:

Explanation:

General Remarks

The balance numbers are the same. (The balance numbers are 2 and 2)

The balance number in front of the O2 is 1.

So for every mole of O2 needed 2 moles of NO2 should be produced.

If 10.0 moles of oxygen is used, then you should get 20 mols of NO2 should be produced.

Formula

% yield = (what was produced / what should have been produced) *100

Givens

What was produced = 7 moles

What should have been produced = 20 moles

Solution

Substitute the givens into the equation

% yield = 8/20 * 100

% yield = 0.40 * 100

Answer: 40%

Answer:

1178J is the heat of the reaction

Explanation:

Assume that the reaction mixture has a density of 1.00 g/mL and a specific heat of 4.184 J/g-oC. The calorimeter has a heat capacity of 10.0 J/oC

The heat of a reaction follows the equation:

Q = m*S*ΔT

Where Q is the heat of the reaction,

m is the mass:

61.2mL * (1.00g/mL) = 61.2g

S is specific heat = 4.184J/g°C

ΔT = 4.6°C

Replacing:

Q = 61.2g*4.184J/g°C*4.6°C

Q = 1178J is the heat of the reaction

Taking into account the definition of density, the mass of the sample of oil with a volume of 10 cm³ and a density of 0.8 \(\frac{g}{cm^{3} }\)  is 8 grams.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

\(density=\frac{mass}{volume}\)

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

\(0.8 \frac{g}{cm^{3} } =\frac{mass}{10 cm^{3} }\)

Solving:

mass=  0.8 \(\frac{g}{cm^{3} }\) × 10 cm³

mass= 8 g

In summary, the mass of the sample of oil with a volume of 10 cm³ and a density of 0.8 \(\frac{g}{cm^{3} }\)  is 8 grams.

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The balanced oxidation-reduction equation for the destruction of cyanate ion waste solution from gold-mining operations by treatment with hypochlorite ion in basic solution is:

OCN⁻(aq) + OCl⁻(aq) + 2OH⁻(aq) → CO₂⁻(aq) + N₂(g) + Cl⁻(aq) + H₂O(l)

In this reaction, the cyanate ion (OCN⁻) is oxidized to carbon dioxide (CO₂⁻) and nitrogen gas (N₂), while the hypochlorite ion (OCl⁻) is reduced to chloride ion (Cl⁻). The reaction takes place in basic solution, which provides the hydroxide ions (OH⁻) needed to neutralize the acidic H⁺ ions produced during the oxidation of the cyanate ion.

The reaction is exothermic, releasing heat energy as the products form. This reaction is an effective way to dispose of the cyanate ion waste generated by gold-mining operations, as it converts the hazardous waste into harmless gases and ions.

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The volume units that are greater than one liter are kiloliter and megaliter. Kiloliter is equal to 1,000 liters, and megaliter is equal to 1,000,000 liters.

The other volume units listed are smaller than one liter. Milliliter is equal to one-thousandth of a liter, centiliter is equal to one-hundredth of a liter, deciliter is equal to one-tenth of a liter, and nanoliter is equal to one-billionth of a liter.

Knowing the conversions between these volume units is essential in science and everyday life, as they are used to measure the volumes of liquids and gases in different contexts.

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Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

Answer:

1.593 moles

Explanation:

Therefore, 1.593 moles are equal to 89.23 g of calcium oxide.

Answer:

9.64 × 10²³ molecules

Explanation:

Given data:

Mass of calcium oxide = 89.23 g

Number of molecules = ?

Solution:

First of all we will calculate the number of moles of calcium oxide.

Number of moles = mass/molar mass

Number of moles = 89.23 g/ 56.1 g/mol

Number of moles = 1.6 mol

Number of molecules;

1 mole contain 6.022 × 10²³ molecules

1.6 mol × 6.022 × 10²³ molecules / 1mol

9.64 × 10²³ molecules

The number 6.022 × 10²³ is called Avogadro number.