Which gas is given out during burning process

Below are the equations and those that have been balanced

A balanced chemical equation means that the number of atoms of each element is the same on both sides of the equation. In other words, the mass and charge are conserved in the reaction, and no atoms are created or destroyed. Balancing the equation involves adjusting the coefficients to ensure that the number of atoms of each element is equal on both sides.

From the question given,

The balanced equation will be:

2Sr + O2 ➡️ 2SrO

The balanced equation will be:

4Na + O2 ➡️ 2Na2O

The balanced equation will be:

2K + Cl2 ➡️ 2KCl

The balanced equation will be:

Ca + F2 ➡️ CaF2

The balanced equation will be:

2Mg + O2 ➡️ 2MgO

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The elements needed by the gardener to carry out this experiment are a ruler, a calendar, a tag notes and a pen. and the procedure you should use is observation.

To identify which plant grows faster, the gardener must place the three plants in the same place so that they are in the same conditions. Additionally, you must check that the initial measurement of the three plants is 10cm and put a tag note on the top of the plant to mark its height.

Then on the calendar he should mark the day he planted them and look at them a week later. When you look at them again, you should identify the height differences using the tag notes as a reference. In this case, he must repeat the same procedure of putting a tag note on the highest part of the plants and look at the plants again in a week.

Once the second week has passed, the gardener will be able to establish which plant has grown the most over the course of two weeks. This will allow you to conclude which plant grows in the shortest time.

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According to specific heat capacity, 846.93 kilojoules of heat are required to heat 3. 7 kg of water from 25 Celsius to 79.5° Celsius.

Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.

It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.

It is given by the formula ,

Q=mcΔT, on substitution it gives Q= 3.7×10³×4.2×54.5=846.93 kilojoules.

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Molarity of a KCL solution made by dissolving 28.4 g of KCL in a total volume of 500 ml is calculated as 0.7619 M KCL.

Mole is a unit of measurement used for chemical substance. Molarity is also known as the molar concentration of solution. It is the technique of calculating the amount of substance that a particular chemical solution contains.

As we know that the molar mass of KCl is 74.55 g/mol.

Hence, molarity = 28.4 g * 1 mol KCl /74.55 g * 1/500 mL * 1000 mL/1 L

Now, molarity = 0.7619 M KCl.

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Answer:

C?

Explanation:

The net ionic equation for the reaction between aqueous solutions of NaCl and AgNO3 is:

NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)

The above reaction is double displacement reaction. Ag⁺ ions from AgNO3 react with Cl⁻ ions from NaCl to form a precipitate of AgCl. On the other hand, Na⁺ ions from NaCl combine with NO3⁻ ions from AgNO3 to produce the soluble salt NaNO3(aq).

The balanced chemical equation for the given double displacement reaction is as follows:

NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)

The ionic equation for the reaction as follows : Na⁺(aq) + Cl⁻(aq) + Ag⁺(aq) + NO3⁻(aq) → Na⁺(aq) + NO3⁻(aq) + AgCl(s). The net ionic equation for the given reaction can be obtained by eliminating spectator ions from the ionic equation. Spectator ions are those ions which are present on both sides of the equation and don't participate in the reaction.

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Answer:

D

Explanation:

Answer:

Fermentation is a metabolic process in which an organism converts a carbohydrate, such as starch or a sugar, into an alcohol or an acid. For example, yeast performs fermentation to obtain energy by converting sugar into alcohol.

Sometimes bacteria perform fermentation, converting carbohydrates into lactic acid...

You can look up videos of yeast fermentation in apple juice.

447.81830943999995. that's the mass

Answer

- What is an electron?

An electron a stable subatomic particle with a negative charge of electricity, it is found in all atoms and acting as the primary carrier of electricity in solids.

- How does the electrons movement creates an electric current?

Electrons flow in a certain rate, creating an electric current. So the electrons moving freely from one place to another place will conduct electric current.

Answer:

Once ignited, a ribbon of magnesium metal burns freely in air to form solid magnesium oxide in the form of a white powder. The reaction is plainly spontaneous even though ΔS is negative.

In individual alcohol treatment program is most likely to be sought out by the individual with the alcohol problem.

An individual indulged in too much drinking is called alcoholic.

Too much drinking can lead to many health problems such as digestive problems, heart disease, mood swings, diarrhea, liver disease and behavioral issues.

It also weakens the immune system and accelerates the chances of getting sick.

Therefore, it is important to deal with dangerous drinking issues by treating behavioral problems through counseling, discussion, educating youngsters and addressing their concerns and problems in the right way.

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The standard electrode potential for the cathode is 0.98 V, to two decimal places.

In a voltaic cell, the standard cell potential (cell) is equal to the difference between the standard electrode potentials of the cathode (cathode) and the anode (anode). This relationship can be represented by the equation:

cell = cathode - anode

You are given that the standard cell potential (cell) is 1.13 V and the standard electrode potential for the anode (anode) is -0.15 V. To find the standard electrode potential for the cathode (cathode), you can rearrange the equation:

cathode = cell + anode

Substitute the given values into the equation:

cathode = 1.13 V + (-0.15 V)

cathode = 0.98 V

So, the standard electrode potential for the cathode is 0.98 V, to two decimal places.

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Answer:

64.2

Explanation:

2.8+17.8+13.7+8+21.9 = 64.2

Electronic configuration is given by

\(\\ \tt\bull\rightarrowtail 1s^22s^1\)

So

The statement true about the environment of most of the earth is that it usually in equilibrium but easy to change on a small scale.

Therefore, Option 3 is correct statement

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Answer:

6.05 g

Explanation:

Use the density to convert the volume to a weight.

(5.00 mL) × (1.21 g/mL) = 6.05 g liquid plant food

You will need 6.05 g liquid plant food.

Answer:  La Ferrassie 1

Explanation: La Ferrassie 1, often referred to as LF1, is a male Neanderthal skeleton estimated to be 70–50,000 years old. It was discovered at the La Ferrassie site in France by Louis Capitan and Denis Peyrony in 1909. The skull is the most complete Neanderthal skull ever found.

Answer:

\(\Large \boxed{\mathrm{A}}\)

Explanation:

Rust formed from iron and oxygen combining is a chemical change, because in a chemical change, the resulting substance(s) will have different properties from the substance(s) before the chemical change.

I cant comment... So is it Right?

The mole ratio of nitrogen to neon is 0.41 when there are 5.1 moles of nitrogen and 12.3 moles of neon.

The mole ratio of nitrogen to neon can be found by dividing the number of moles of nitrogen by the number of moles of neon.



The balanced chemical equation for this reaction is not given, so we cannot determine the mole ratio directly from the equation. However, we can use the mole ratio to determine the ratio of the coefficients in the balanced equation.

Mole ratio of nitrogen to neon = moles of nitrogen / moles of neon

Moles of nitrogen = 5.1
Moles of neon = 12.3

Mole ratio of nitrogen to neon = 5.1 / 12.3

Mole ratio of nitrogen to neon = 0.41

Therefore, the mole ratio of nitrogen to neon is approximately 0.41.

In conclusion, the mole ratio of nitrogen to neon is 0.41 when there are 5.1 moles of nitrogen and 12.3 moles of neon.

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Meika's position is best defended by the experimental work will consist mostly of careful observation, recorded concisely and accurately. Thus, option b is correct.

Systematic error is an error that occurs because of a constant offset from the actual value due to a flaw in the procedure or equipment.

By carefully timing each part of the experiment, you eliminate the possibility of systematic errors due to variations in timekeeping.

Therefore, Maika's position would best be defended by the experimental work will consist mostly of careful observation, recorded concisely and accurately." Although this option is a good defense for the experiment, it directly addresses Meika's position.

This statement implies that the error associated with the experiment could be related to the way the observations were made, recorded, or interpreted, which suggests a possible systematic error.

Thus, option b is correct.

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The atoms of various elements on the periodic table have different numbers of protons.

However, the atomic number of an element is equal to the number of protons it contains in the nucleus.

1. The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains.

2. If an oxygen atom with 8 electrons, 8 protons, and 9 neutrons, this means that there are 8 protons in the nucleus, the atomic number is equal to the number of protons.

Therefore the atomic number for an element oxygen with 8 protons is 8.

3. The element in the periodic table with 7 protons, 7 neutrons, and 5 electrons is nitrogen

4. The atomic composition of carbon-14 reveals that carbon-14 contains 6 protons and 8 neutrons.

An atom can be defined as the smallest particle of an element which can take part in a chemical reaction.

So therefore, the atoms of elements on the periodic table of elements have different numbers of protons.

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To determine if an Ester has formed, you would typically look for the following indicators: physical appearance, odor, spectroscopic analysis, etc.

The formation of an ester often results in a noticeable change in the physical appearance of the reaction mixture.

Change in odor: Esters often have distinct and characteristic smells. If an ester has formed, you may detect a new odor in the reaction mixture that is different from the smells of the reactants.

Spectroscopic techniques such as infrared (IR) spectroscopy or nuclear magnetic resonance (NMR) spectroscopy can be used to identify the presence of an ester.

Chemical tests: There are specific chemical tests that can be performed to confirm the presence of an ester.

Thus, this way, one can know the formation of ester.

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Answer:

2, 8, 8

Explanation:

The first electron shell always has 2 electrons when it is complete. The second electron shell and 3rd shell can hold 8 when completed.

Answer:

see explanation

Explanation:

The molecular equation => F₂(g)  +  SrCl₂(aq) => SrF₂  + Cl₂(g)

Ionic Equation:  shows all species involved in the reaction. For the ionic reaction given the ionic equation should show all substances in reaction in ionic form along with the molecular formulas of non-ionic compounds. In general, salts that contain a metal and nonmetal that undergo ionization when dissolved in water.  

The ionic equation => Show ionic compounds in ionized form with oxidation states. Do not ionize weak acids weak bases ( molecular compounds.

=>  F₂(g) + Sr⁺² + 2Cl₋ => Sr⁺²(aq) + 2F⁻ +  Cl₂(g)

The net ionic equation =>  shows only species directly involved in the chemical process. If in the net ionic equation that are equivalent on both sides of the working equation, one should remove those compounds from the ionic equation showing only the species involved in the chemical reaction process.  

=>  F₂(g) + Sr⁺²(aq) + 2Cl⁻(aq) => Sr⁺²(aq) + 2F⁻(aq) +  Cl₂(g)

Note that Sr⁺²(aq) is found on the reactant and product sides of the equation. Cancelling Sr⁺² gives the net ionic equation.

=>   F₂(g) + 2Cl₋(aq) =>  2F⁻(aq) +  Cl₂(g)

The value of the equilibrium constant (Kp) at a temperature of 337.0 K for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) with ΔH° = -92.2 kJ and ΔS° = -198.7 J/K is to be determined. Furthermore, we must assume that ΔH° and ΔS° are independent of temperature. The equilibrium constant (Kp) can be determined by calculating the standard reaction Gibbs free energy (ΔG°) and using the equation shown below;ΔG° = -RTlnKpWhere R is the ideal gas constant, T is the absolute temperature, and lnKp is the natural logarithm of the equilibrium constant (Kp). The standard reaction Gibbs free energy (ΔG°) can be determined using the following equation;ΔG° = ΔH° - TΔS° = -92.2 kJ - (337.0 K)(-198.7 J/K)ΔG° = -92.2 kJ + 67,030 J = -25,170 J = -25.17 kJIt is important to note that J is the SI unit of energy, while kJ is its multiple. Since we are using the value of R in units of J/K·mol, the units for ΔG° must be J.

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The equilibrium constant for the given reaction at 337.0 K is 0.0426 for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g).

Given reaction is: N2(g) + 3H2(g) ⇌ 2NH3(g)Hence the equilibrium constant Kp can be calculated as below: Kp = (P(NH3)2) / (P(N2) * P(H2)3)

Let's find the values of ΔH° and ΔS° at 337.0 K using the following equation:ΔG° = ΔH° - TΔS°Here, ΔG° = -RTln(Kp).

Where, R = 8.314 J K-1 mol-1T = 337.0 K

Now, -RTln(Kp) = ΔH° - TΔS°-8.314 x 337.0 ln(Kp) = (-92.2 x 1000 J mol-1) - (337.0 x ΔS° J mol-1 K-1)-2790.42 ln(Kp) = -92200 - 337ΔS°=> ln(Kp) = 33.03 - (ΔS° / 8.314)

On comparing the above equation with the standard form of Gibbs-Helmholtz equation,i.e. ln(Kp) = -ΔG° / RTWe get,ΔG° = -2790.42 J mol-1.

Now, let's calculate Kp at 337.0 K using the following formula: Kp = e^(-ΔG°/RT)Kp = e^(-2790.42 / (8.314 x 337.0))

Kp = 0.0426Hence, the equilibrium constant for the given reaction at 337.0 K is 0.0426 (approximately).

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Answer:

(i)

A → CH3CH2CH3 ( Propane )

B → CH3CH(Cl)CH3 ( 2-Chloropropane )

C → No product

D→ CH3CH=CH2 ( 2-propene )

E → CH3CH2COOH ( Propanoic acid )

(ii)

Reagent X → Acidified water [ H+ / H2O ]

Reagent Y → Bromine with Carbon tetrachloride [ Br2 / CCl4 ]

Reagent Z → Sodium hydroxide [NaOH]

Answer: A tree grows taller.

Explanation: Cells divide for many reasons. They may divide for growth, death, or to replace something. The cells divide when growth is happening, to allow to produce more cells. For example: When a tree grows taller the cells divide so they can produce more cells. The places in trees where these cell divisions happen, are called “Meristems”. This is where all the activity happens.

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Iron need to lose 7 protons to become a form of potassium.

The atom's building blocks are the electron, proton, and neutron. A core nucleus with neutrons and protons makes up the atom. The nucleus is surrounded by electrons. Electrons are negatively charged, while proton and neutron are positively charged. An atom's nucleus is made up of electrons, protons, and neutrons.

The term proton derives from pro.ton 'pro-tän, which has a mass of 1.673 × 10⁻²⁷ kilogram.

As we know, atomic number of iron (Fe) is 26.

Thus, a neutral atom of iron has 26 protons, 30 neutrons, and 26 electrons.

Also, atomic number of potassium (K) is 19.

Thus, a neutral atom of potassium has 19 protons, 20 neutrons, and 19 electrons.

So, iron need to lose 7 protons to become a form of potassium.

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