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1. The diagram above represents solute particles
(1)
(2)
(3)
dissolved in water. Which of the solutions above (1,2,3) would be considered an
electrolyte?

Frictional force between two objects can be increased by:

i) making the surfaces rough

ii) increasing the mass of the object that ks moving.

Hope it helps you.

The chemical equation when aluminum metal reacts with solid sulfur to produce solid aluminum(III) sulfide would be \(2Al (s) + 3S (s) -- > Al_2S_3 (s)\)

The reaction between aluminum metal and solid sulfur to produce aluminum (III) sulfide would be as follow:

The chemical symbol of aluminum metal = Al

The chemical symbol of sulfur = S

Aluminum has a valence electron of 3 while sulfur has a valance electron of 2. In order to form a bond between them, the valence electron of one becomes the subscript of the other. In other words, aluminum receives the valence of sulfur (2) while sulfur receives the valence of aluminum (3). Thus:

\(2Al +3 S --- > Al_2S_3\)

When all the phases are considered, the equation becomes: \(2Al (s) + 3S (s) -- > Al_2S_3 (s)\)

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Aluminum metal reacts with solid sulfur to produce solid aluminum(III) sulfide. Express your answer as chemical equations. identify all the phases in your answer.

Answer:

it improves the accuracy of the results

Homogeneous distribution of ions in neural tissue is promoted by electrostatic pressure."B) electrostatic pressure."

In neural tissue, the distribution of ions, such as sodium (Na+), potassium (K+), and chloride (Cl-), is important for the proper functioning of neurons. Electrostatic pressure refers to the forces exerted by charged particles, such as ions, due to their electrical charges. This pressure plays a significant role in promoting a homogeneous distribution of ions in neural tissue.

Electrostatic pressure causes ions to repel or attract each other based on their charges. It helps prevent the accumulation of ions in specific regions and promotes their dispersion throughout the tissue. This phenomenon aids in maintaining a balance of ion concentrations within and between cells, enabling normal neural activity and signaling.

Other options mentioned, such as nonrandom assignment, the sodium-potassium pump, selective ion channels, and nonrandom movement, are important processes involved in neural function and ion regulation but do not directly promote a homogeneous distribution of ions in neural tissue as electrostatic pressure does.

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Answer:

False, RNA is single stranded, DNA is double stranded and forms a double helix

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{4.3 \times {10}^{27} }{6.02 \times {10}^{23} } \\ = 7142.857...\)

We have the final answer as

Hope this helps you

Answer:

The process to use this knowledge is explained as below:

Explanation:

1. Farmer should use an indicator to check the pH value of the soil of the field of the farm.

2. If the field or the farm has alkali soil add acid to reduce the pH value.

3. If the soil of the farm is acidic for the crop add alkali to increase the pH value.

4. It will be a neutralization reaction and changes the pH value of the farm.

5. Weather/leeching into the surrounding soil/plant or animal waste will lead to a change in pH value over time.

6. The pH value will need to be regularly monitored and adjusted.

Answer:

what is the question?

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Explanation:

.....................

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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Answer: Copper(I) sulfate, also known as cuprous sulfate and dicopper sulfate, is the chemical compound with the chemical formula Cu2SO4 and a molar mass of 223.15 g mol−1. It is an unstable compound as copper(I) compounds are generally unstable and is more commonly found in the CuSO4 state. It is white in color at room temperature and is water-soluble. Due to the low-stability of the compound there are currently not many applications to date.

Answer:

A. C(s) + O2(g) → CO2(g) + 393.5 kJ

Explanation:

The formation of carbon IV oxide (CO2) is an exothermic process. n exothermic process is a chemical process in which heat is evolved. Speaking in lay man's terminology, heat is one of the 'products' of the reaction. This implies that heat is evolved by the process.

The formation of CO2 is always a combustion reaction where heat is evolved or released by the reaction system. Hence the reaction could be shown as;

C(s) + O2(g) → CO2(g) + 393.5 kJ

This implies that 393.5 kJ of energy is released in the reaction in the form of heat. Hence the answer given in the answer box.

Answer: C(s) + O2(g) → CO2(g) + 393.5 kJ

Answer:

Neptune

Explanation:

Answer:

It provides the electrons that "make" electricity and it contains the electrons that are involved in molecular bond formation.

Answer:B

Explanation:Coefficient represents the number of units of each substance.

The original volume of HBr that was titrated can be calculated as the ratio of the moles of HBr to its concentration.

To determine the original volume of HBr that was titrated, we can use the concept of stoichiometry and the equation balanced for the neutralization reaction between HBr and KOH.

The balanced equation is:

HBr + KOH → KBr + H₂O

From the balanced equation, we can see that the stoichiometric ratio between HBr and KOH is 1:1. This means that for every mole of HBr, we need an equal number of moles of KOH to complete neutralization.

First, let's determine the moles of KOH used in the titration:

Moles of KOH = 0.500 M × 0.075 L = 0.0375 mol

Since the stoichiometric ratio is 1:1, this also represents the number of moles of HBr that were neutralized.

Now, we can calculate the original volume of HBr using the concentration of the unknown solution:

Moles of HBr = 0.0375 mol

Concentration of HBr = unknown (let's assume it is C mol/L)

Volume of HBr = Moles of HBr / Concentration of HBr = 0.0375 mol / C mol/L

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Electrical demand in a wiring system is determined by the amount of. So, the correct answer is c.) Watts consumed.

The electrical demand in a wiring system is determined by the amount of content loaded (i.e. the number and types of devices connected to the system) and the total power (in watts) that these devices consume. It is not related to the ohms or voltage of the system, nor is it affected by water pressure in the system. Electrical demand in a wiring system is determined by the amount of. So, the correct answer is c.) Watts consumed.

The amount of loaded content (i.e., the number and types of connected devices) and the combined power (measured in watts) that these devices use in a wire system determine the electrical demand in that system. It is neither impacted by the system's voltage or ohms, nor is it influenced by the water pressure.

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Ammonium nitrite, NH4NO2, will decompose to yield nitrogen gas and water Vapor by the following equation:

NH4NO2(s)--->2H2O(g)+N2(g)

A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products. As per law of conservation of mass, the mass of your initial substances (reactants) will be the same as the mass of the substances that you get after the reaction has occurred (products). The mass will stay the same because the number of each kind of atom stays the same. The mass will increase because a new kind of molecule is formed. The principle is that the mass of matter, in a closed system, will always be the same no matter what type of change happens to the matter. Whether it's a change in state, or dissolving, or a chemical reaction, or any combination of these, the amount of mass will not change.

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Answer:

convection

Explanation:

Answer:

I'm sorry, you didn't post the pictures.

Answer:

Photosynthesis occurs in two stages. During the first stage, the energy from sunlight is absorbed by the chloroplast. Water is used, and oxygen is produced during this part of the process.

Explanation:

Answer:

Chloroplast absorbs the energy emitted by the Sun.

_____________________________________________________

Context:

Photosynthesis:

The complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates by green plants, algae, and certain bacteria, using energy from the sun and chlorophyll.

Chloroplast:

A plastid containing chlorophyll.

Chlorophyll:

The green coloring matter of leaves and plants, essentially to the production of carbohydrates by photosynthesis, and occurring in a blush-black form, C55J72MgN4O5 (chlorophyll a), and a dark-green form, C55H70MgtN4O6 (chlorophyll b).

Sun:

The star that is the central body of the solar system, around which the planets revolve and from which they receive light and heat: its mean distance form earth is about 93 million miles (150 million km), its diameter about 864,000 miles (1.4 million km), and it's mass about 330,000 times that of earth; its period of surface rotation is about 26 days at its equator but longer at higher latitudes.

Explanation:

There are two main phases in photosynthesis:

depending on light stage

Clause Cycle (AKA the dark stage or the light-independent stage)

In the light-dependent stage, ATP and NADPH are produced using photons, or light energy. Oxygen molecules start to form during this stage as a byproduct.

Utilizing the materials produced during the light-dependent stage, the Calvin cycle fixes CO2 molecules to produce carbohydrates (sugars). This stage can repeat itself indefinitely since RuBP, the initial chemical required for the stage to go further, also serves as its byproduct.

Answer

C. Any substance with a pH above 7.

Explanation

Alkalis are water-soluble bases. bases that may be dissolved in water to produce OH⁻ ions are termed alkali. Alkali turns red litmus blue and is sour to taste. pH of an alkali substance is greater than 7.

Examples of alkali are NaOH, KOH, and Ca(OH)₂.

Hence, the answer which best describes an alkali is option C. Any substance with a pH above 7.

Answer:

0.67atm is the new pressure of the gas

Explanation:

To find one condition of a gas when pressure, volume and absolute temperature change we must use combined gas law:

\(\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}\)

Where P is pressure, V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.

Replacing:

P₁ = 1.12atm

V₁ = 156mL

T₁ = 28.1°C + 273.15K = 301.25K

P₂ = ?

V₂ = 312mL

T₂ = 87.2°C + 273.15 = 360.35K

1.12atm*156mL / 301.25K = P₂*312mL / 360.35K

P₂ = 0.67atm is the new pressure of the gas

The quantity of electricity that deposit 10.8g of silver is equal to 9,650 coulombs and the the mass of aluminum which will be deposited by the same quantity of electricity is equal to 2.7g.

During the electrolysis process, the amount of substance deposited on an electrode is directly proportional to the amount of electricity passed through the electrolyte solution. This constant of proportionality is called as Faraday's constant. It is equal to 96,500 coulombs per mole of electrons.

In 108g, the number of moles of Aluminum is 1 mole.

In 10.8g, the number of moles of Aluminum is equal to 0.1 moles.

Since 96.500 coulombs of energy is used to transfer 1 mole of substance, So, 9650 coulombs of energy will be required to transfer 0.1 moles of the substance.

Since 27g of Aluminum will be transferred by 96500 coulombs of energy, so in 9650 coulombs of energy, 2.7g of Aluminum will be deposited.

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The final volume, when 0.607 L of a 47.0% (m/v) solution is diluted to 24.0% (m/v), is approximately 1185.417 mL.

To find the final volume when a solution is diluted, we can use the equation;

C₁V₁ = C₂V₂

where; C₁ is the initial concentration

V₁ is the initial volume

C₂ is the final concentration

V₂ is the final volume

Given;

Initial volume (V₁) = 0.607 L

Initial concentration (C₁) = 47.0% (m/v)

Final concentration (C₂) = 24.0% (m/v)

We need to calculate the final volume (V₂) in milliliters (mL).

Convert the initial and final concentrations to decimal form;

C₁ = 47.0% = 0.47 (m/v)

C₂ = 24.0% = 0.24 (m/v)

Convert the initial volume from liters to milliliters;

V₁ = 0.607 L × 1000 mL/L = 607 mL

Rearrange the equation and solve for V₂;

C₁V₁ = C₂V₂

V₂ = (C₁V₁) / C₂

V₂ = (0.47 × 607) / 0.24

V₂ ≈ 1185.417 mL

Therefore, the final volume is 1185.417 mL.

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The answer is "1.2". The balanced equation for the reaction is as follows: P4O10(s) + 6H2O(l) → 4H3PO4(aq)

To determine the number of moles of phosphoric acid that will be formed upon the complete reaction of 32.3 grams of diphosphorus pentoxide with excess water, we need to use stoichiometry.

Stoichiometry is a branch of chemistry that deals with the calculation of relative quantities of reactants and products in chemical reactions.

The mass of one mole of substance is known as its molar mass.

The number of particles in one mole of substance is known as Avogadro's number and is equal to 6.022 x 1023.

In the given reaction:

Mass of diphosphorus pentoxide, P4O10 = 32.3 g

Number of moles of P4O10 = mass/molar mass= 32.3 g/(30.97 g/mol + 4 × 15.99 g/mol)= 0.3 mol

According to the balanced chemical equation:1 mol of P4O10 will give 4 mol of H3PO4

Therefore, 0.3 mol of P4O10 will give = 0.3 mol × 4 mol H3PO4/1 mol P4O10= 1.2 mol H3PO4

So, 1.2 moles of phosphoric acid will be formed upon the complete reaction of 32.3 grams of diphosphorus pentoxide with excess water.

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Answer:

C. accuracy of the data sample size of the data

Explanation:

Measuring instruments, such as rulers and graduated cylinders, are often used in experiments to increase the accuracy of the data sample size which is usually gotten from the taken reading.

Measuring instruments such as rulers have accurate readings which makes measurements in any form very easy and more accuracy.

Answer:

Here boron-11 means the name of the element is boron and the mass number is 11

Explanation:

Answer:

carbon-12 (12C) and carbon-13 (13C).

nitrogen-14 (14N) and nitrogen-15 (15N)