What is the law of conservation and what happens when two substances at different temperatures come into contact.

Answer:

a - the position of equilibrium lies far to the right, with products being favored.

Explanation:

Answer:

its A on edge :)

Explanation:

Calculating the temperature change of an item when a specific quantity of heat is added to or withdrawn from it may be done using the equation q = mcT. According to the equation, the amount of heat, q, is determined by the object's mass, m, its specific heat capacity, c, and the temperature change, T.

We may utilise the equation T = q/mc to find the solution for the temperature change, T. By dividing both sides of the equation by mc, this equation may be created from the original equation, q = mcT. mc/mc is equal to 1 on the right while q/mc is equal to T on the left. T thus equals q/mc.

To use this formula, we requireT thus equals q/mc. We must first establish the values of q, m, and c before we can use this equation. In joules, the quantity of heat, q, may be calculated. The object's mass, m, can be expressed in kilogrammes. A table of specific heat capacities contains the object's c specific heat capacity. Once these numbers have been established, we may enter them into the equation and find the value of T.

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The tennis ball has a kinetic energy of around 56.8 J. The aircraft has a kinetic energy of around 4.43 x 10⁹ J. The hot air balloon travels at a speed of around 9.0 m/s.

How much effort must be put into slowing down a 750 kg automobile from 100 km/h to 50 km/h. We know that the of this automobile at 50.0 km/h is 72,300 Joules from the last example problem.

Ek = 0.5 x 0.058 kg x (46 m/s)²

Ek = 0.5 x 0.058 kg x 2116 m²/s²

Ek = 56.8468 J

Ek = 0.5mv²

Ek = 0.5 x 2.15 x 10⁵ kg x (255 m/s)²

Ek = 0.5 x 2.15 x 10⁵ kg x 65025 m²/s²

Ek = 4.433 x 10⁹ J

Ek = 0.5mv²

v = √(2Ek/m)

v = √(2 x 76550 J / 1890 kg)

v = √(81.011 J/kg)

v = 9.0 m/s (approx.)

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If a snail crawls 55 inches per day ,the snail will crawl approximately \(3.2 * 10^3 centimeters.\)

To convert inches to centimeters, we need to use the conversion factor: 1 inch = 2.54 centimeters.

First, let's calculate the distance the snail crawls in inches in 23 days. We can multiply the daily distance by the number of days:

Distance in inches = 55 inches/day × 23 days = 1265 inches.

Now, to convert the distance from inches to centimeters, we multiply the distance in inches by the conversion factor:

Distance in centimeters = 1265 inches × 2.54 cm/inch = 3215.1 cm.

Rounding to the appropriate number of significant figures, the snail will crawl approximately 3215 cm or \(3.2 * 10^3 centimeters.\) in 23 days.

Therefore, the answer is  Option 3:\(3.2 * 10^3 centimeters.\)

This means that in 23 days, the snail will crawl approximately\(3.2 * 10^3 centimeters.\)

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Explanation:

To calculate the heat gained by nickel, we can use the formula:

q = m * c * ΔT

where q is the heat gained, m is the mass of the nickel, c is the specific heat of nickel, and ΔT is the change in temperature.

Given:

- Mass of nickel, m = 31.4 g

- Specific heat of nickel, c = 0.443 J/g · °C

- Change in temperature, ΔT = 64.2 °C - 27.2 °C = 37.0 °C

Substituting the values into the formula, we get:

q = (31.4 g) * (0.443 J/g · °C) * (37.0 °C)

Simplifying the calculation, we get:

q = 584 J

Therefore, the heat gained by nickel when 31.4 g of nickel is warmed from 27.2 °C to 64.2 °C is 584 J.

The ionization of the following acids can be represented as:

Tetraoxosulphate (VI) Acid (\(H_{2}SO_{4}\)) ionizes as H+ and SO4^2- ions.

Trioxonitrate (V) Acid (\(HNO_{3}\)) ionizes as H+ and \(NO_{3-}\) ions.

Ethanoic Acid (\(CH_{3}COOH\)) ionizes as H+ and \(CH_{3}COO^{-}\) ions.

Tetraoxosulphate (VI) Acid, also known as sulfuric acid (\(H_{2}SO_{4}\)), ionizes as follows:

\(H_{2}SO_{4}\) → \(H+\) + \(SO_{4}^{2-}\)

In this reaction, sulfuric acid donates two hydrogen ions (H+) to the solution, forming sulfate ions (\(SO_{4}^{2-}\)).

Trioxonitrate (V) Acid, commonly known as nitric acid (\(HNO_{3}\)), ionizes as follows:

\(HNO_{3}\) → \(H+_{}\) + \(NO_{3-}\)

Nitric acid dissociates to release one hydrogen ion (\(H+\)) and a nitrate ion  (\(NO_{3-}\)).

Ethanoic Acid, also known as acetic acid (\(CH_{3}COOH\)), ionizes as follows:

\(CH_{3}COOH\) → H+ + \(CH_{3}COO^{-}\)

Acetic acid donates a hydrogen ion (H+) to the solution, forming an acetate ion (\(CH_{3}COO^{-}\)).

In all cases, the acids dissociate in water, producing hydrogen ions (H+) as positively charged ions and their corresponding anions. The hydrogen ions are responsible for the acidic properties of these substances, while the anions contribute to the overall charge balance in the solution. The ionization of acids allows them to conduct electricity in aqueous solutions and react with other substances.

The question was incomplete. find the full content below:

Indicate the ionization of the following acids,

Tetraoxosulphate (VI) Acid

Trioxonitrate (V) Acid

Ethanoic Acid.​

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A solution has a pH of 5.4, the determination of [H+].

Take negative to other side

-pH = log H+

multiple Antilog on both side

(Antilog and log cancel each other )

Antilog (-pH) = [ H+ ]

New Formula :- Antilog (-pH) = [+H]

Now put the values of pH in new formula

Antilog (-5.4) = [+H]

we can write -5.4 as (-6+0.6) just to solve Antilog

Antilog ( -6+0.6 ) = [+H]

Antilog (-6) × Antilog (0.6) = [+H]

\(Antilog (-6) = {10}^{ - 6} , \\ Antilog (0.6) = 4 \)

put the value in equation

\( {10}^{ - 6} \times 4 = [H+] \\ 4 \times {10}^{ - 6} = [H+]\)

The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

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Most of the elements to the left of the stair-step line in the periodic table exist as liquids in the periodic table and the correct option is option B.

The periodic table is a tabular arrangement of the chemical elements by increasing atomic number which displays the elements so that one may see trends in their properties.

Elements are arranged from left to right and top to bottom in the order of their increasing atomic numbers. Thus,

Therefore, Most of the elements to the left of the stair-step line in the periodic table exist as liquids in the periodic table and the correct option is option B.

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Answer:

so so

Explanation:

this your question?? <_>

Answer:

Question: what is the purpose of ash to soil conditioning?

answer: soil conditioner is a product that is added to soil to improve the soils physical qualities, it's usually the fertility of the soil and sometimes the mechanics of the soil. can be used to improve poor soils.

most wood ash contains a good percentage, about 25 percent, of calcium carbonate, which is an ingredient in garden lime. if your soil is highly acidic, with a pH of 5.5 or lower, amending with wood ash can raise the pH of your soil.

Answer:

Hey mate here's your answer ⤵️

Lemon juice in its natural state is acidic with a pH of about 2, but once metabolized it actually becomes alkaline with a pH well above 7

Answer:

A

an element made of carbon and oxygen atoms.

So I think the answer is going to be A An element made of carbon and oxygen atoms.

The limiting reactant is Na₂S and the theoretical yield of SnS₂ is 60.9%.

Moles of SnBr₄ = Molarity × volume (L)

                         = 0.605 mol/lit × 0.045 lit

                         = 0.02722 mole

Moles a Na₂S. = Molarity x volume (L).

                        = 0.181 mol/lit X 00538 (lit)

                        = 0.00973 mol

From the balanced chemical equation.

I mole of SnBr₄ = 2 mole of Na₂S

Multiply by 0.02722

0.02722 mole SnBr₄ = 2 x 0.02722 mol Na₂S.

Moles Na₂S required = 0.0544 mol

Moles of Na₂S Present = 0.00973 mol

Hence the limiting reactant is Na₂S.

2 Mole of Na₂S = 1 mole of SnS₂

1 Mole of Na₂S = 1/2 mole of SnS₂

multiply by 0.00973

0.00973 mol Na₂S = 0.009731 mol × 1/2 mol SnS₂

mole of SnS₂ = 0.004865 mol·

Gram of SnS₂ = No of moles x Molar mass

                       = 0.004865m × 182.89 g/mol

                       = 0.889 g

Percent. yield = Practical field / Theoretical yield × 100

= (0.541)/(0.889) × 100

= 60.85%

= 60.9%

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According to the Avogadro's number, there are 3.011×10²³ atoms in 0.5 mole of aluminium.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number, on substituting values in formula, 0.5×6.023×10²³=3.011×10²³ atoms.

Thus, there are 3.011×10²³ atoms in 0.5 mole of aluminium.

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Question 17.

We are given the following balanced equation:

The reactant in excess is H2O, meaning the limiting reactant is Fe. We will first calculate the number of moles of Fe, use those moles to get Fe3O4 number of moles, then convert moles to mass.

We want to calculate the moles of Fe3O4 that will be produced, given:

mass of Fe = 500 g

we know

molar mass of Fe = 55,845 g/mol

molar mass of Fe3O4 = 231,533 g/mol

The molar ratio between Fe and Fe3O4 is 3:1

So:

Number of moles of Fe3O4 = 2.98 mol

To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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Answer:

C6H12O6

Explanation:

C6H12O6

Hey there!

The formula for density is d = m/v.

The mass of the sample is 56.5 g, and the volume of the sample is 5 cm³.

So, to plug these values into the equation, we have:

\(d=\frac{56.5}{5}\)

Simplified, this is:

d = 11.3

The unit for this is g/cm³, or grams per cubic centimeter.

So, the density of lead is 11.3 g/cm³.

Hope this helps!

Answer:

11.3 g/cm³

Explanation:

Density of lead

= Mass / Volume

= (56.5 g) / (5 cm³)

= 11.3 g/cm³

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. The volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. According to the balanced chemical equation, for every 2 moles of water (H2O) electrolyzed, 1 mole of oxygen gas (O2) is obtained. Since 1 mole of any gas occupies 22.4 L at standard temperature and pressure (STP), we can use the stoichiometry of the reaction to determine the volume of oxygen gas produced.

Given that 50 cm³ of gas is obtained at the anode, we need to convert this volume to liters:

50 cm³ = 50/1000 L = 0.05 L

Using the stoichiometric ratio of the balanced equation, we find that 2 moles of water produce 1 mole of oxygen gas. Therefore, 0.05 L of oxygen gas is equivalent to:

0.05 L × (1 mole/22.4 L) = 0.002232 moles

Thus, the volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

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Mechanical disintegration means breaking into small pieces (option A).

Digestion is the process occuring in the gastrointestinal tract, by which food is converted into substances that can be utilized by the body.

Digestion can, however, be mechanical/physical or chemical/enzymatical. The mechanical digestion involves the breaking down of food into smaller pieces by teeth.

Therefore, according to this question, there is no passage, however, the meaning of mechanical disintegration can be easily detected in biology.

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The number 38.7 x 10⁷ is already in scientific notation

The coefficient is 38.7 and the exponent is 7.

In the given number, 38.7 x  10⁷,  the coefficient is 38.7, which is a decimal number between 1 and 10.

The exponent of 10 is 7, which tells us to move the decimal point seven places to the right to get the actual value of the number.

So, 38.7 x 10⁷ can be expanded as follows:

38.7 x  10⁷= 38.7 000 000

we moved the decimal point seven places to the right and filled the empty spaces with zeros. This gives us the actual value of the number in standard form.

Scientific notation, also referred to as standard form or exponential notation, is a format for succinctly expressing very large or very tiny numbers. It is predicated on the notion that a number can be represented as the result of a coefficient and a multiple of 10.

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Answer:

it will be 630

Explanation:

Sedimentation, filtration, and coagulation are the treatments that will help remove contaminants from minerals or from the pipes carrying water from a source.

Sedimentation is a process in which suspended particles settle out of water. It is one of the most basic techniques for removing particles from water. As particles settle, they become trapped in the bottom of a container or settle to the ground in an outdoor setting

Filtration is a method of removing particles from a fluid. It is a physical or chemical separation method that separates solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass.

Coagulation is the process of using chemicals to remove contaminants from water. By creating a chemical reaction, coagulation destabilizes particles and causes them to clump together. This helps to remove the contaminants from the water.

Disinfection is the process of eliminating or destroying pathogens that cause infection. Disinfection eliminates harmful microorganisms by destroying or inactivating them. The disinfectant is a chemical or physical agent that is used to destroy or inactivate harmful microorganisms.

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The concept molarity is used here to determine the pH after adding 12.6 mL of the base. The term molarity is an important method which is used to calculate the concentration of a solution. Here the pH is 1.23.

The term molarity is defined as the number of moles of the solute dissolved per litre of the solution. It is also called the molar concentration. It is represented as 'M' and its unit is mol / L.

Molarity is given as:

M = Number of moles / Volume of solution in liters

'n' of HCN = 20.2 × 1 L / 1000 mL × 0.382 = 0.0077 mol

'n' of Ba(OH)₂ = 13.7 × 1L / 1000 mL × 0.421 = 0.0057 mol

Excess H⁺ = 0.002

Total volume = 20.2 + 13.7 = 33.9 mL = 0.0339 L

Concentration of H⁺ = 0.002 / 0.0339 = 0.058

So pH is:

pH = - log[H⁺]

pH = - log[ 0.058] = 1.23

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Answer:

1. NaCl

2. NH4F

3. MgO

4.LiCl

5. KI

6. CaO

Explanation:

In that order

The ground state electronic configuration for silicon is 1s² 2s² 2p⁶ 3s² 3p².

The electronic configuration is given to each and every element of the periodic table and with the help of this configuration by counting the number of electrons in the series we can predict the position of the element in the periodic table in ground state.

Every element of periodic table have his own electronic configuration

but for exited state it can change on the basis of removal of electrons.

Therefore, the electronic configuration of silicon at ground state will be 1s² 2s² 2p⁶ 3s² 3p².

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Answer:

Hence, there are approximately $1.686\times {{10}^{22}}$ molecules in 2.3 grams of $N{{H}_{4}}S{{O}_{2}}$.