Consider the following balanced equation:
2KCIO3 → 2KCl + 302
How many grams of O2 will be obtained by decomposing
98.1 grams of KClO3?
Оа
38.4 grams
b
17.1 grams
Ос
25.6 grams
76.8 grams

A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

Energy is a property that is transferred to a physical system, recognizable in the performance of work and in the form of heat and light.

A small sample of methane undergoes combustion. As the hot gas mixture expands, it releases energy (E).

The change in the energy is the sum of the heat released and the work done.

ΔE = q + w = -120.0 kJ + (-830.0 kJ) = -950.0 kJ

A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

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Answer:

The protons

Explanation:

The force of attraction/repulsion is indirectly proportional to the square of the distance between...the protons are much closer together and will have a stronger force.

F = k q1q2 / r^2

If the colored spheres are solutes, the overall direction of water would be out of the cell based on the principle of osmosis.

It is the movement of water molecules from the region of high water potential (low solutes) to the region of low water potential (high solute) through a selectively permeable membrane.

In the illustration, there are more colored spheres outside of the cell than inside of it. This means that there are more solutes outside the cell (lower water potential) than inside of the cell (higher water potential).

Thus, water will move from the inside of the cell to the outside until an equilibrium is established.

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[tex]\sf\huge\underline\purple{Ozone\: Gas:-}[/tex]

[tex]\rightarrow[/tex]Ozone is an allotropic molecular form of oxygen containing three atoms of oxygen (O3). Ozone O3 is generated through the passage of oxygen O2 through a high voltage potential resulting in the attachment and formation of a third oxygen atom.

[tex]\rightarrow[/tex]The molecular formula for ozone (O3) was established by Soret (1863) by taking the ratio of the change in volumes when O3/O2 mixtures were either heated or exposed to turpentine and cinnamon oil.

[tex]\rightarrow[/tex]Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.

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Hope it helps you:)

Answer:

gravity equation.

Explanation:

use this gravity equation

F= G(m1*m2/d²)

A real gas behaves least like an ideal gas under the conditions of low temperature and high pressure.

This is because at low temperature and high pressure molecules of gas will have negligible kinetic energy and strong force of attraction. Thus, real gas will not behave like an ideal gas.

Whereas at high temperature and low pressure a real gas will behave like an ideal gas.

Answer: No real gas is ideal. All molecules have a volume and intermolecular forces of attraction. So a "real molar volume" is different from an ideal molar volume.

Explanation: I hope this help

Magnesium oxide is an ionic compound with a very high melting point and which requires a large amount of energy for melting.

Ionic compounds are compounds which are formed between oppositely charged ions which are held together by electrostatic forces of attraction between the oppositely charged ions.

Ionic compounds are formed when metal atoms donate electrons to non-metals atoms to form ions.

Magnesium oxide is an ionic compound.

The nature of bonding is ionic bonding.

It has a crystalline lattice structure.

The forces of attraction is electrostatic forces of attraction.

It has a high melting point of 2,852 °C, and thus requires a large amount of energy go melting to occur.

Therefore, magnesium oxide is an ionic compound which requires a large amount of energy for melting.

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The water molecules have more kinetic energy and have a greater chance of interacting with (and dissolving) the potassium iodide.

Stirring breaks a solute into smaller pieces which increases its surface area as well as its rate of dissolution. Stirring brings unused portions of the solvent in contact with the solute which allows the solute to dissolve faster.

So we can conclude that option A is the right answer.

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Answer:

sunlight, light energy from the sun

Explanation:

energy is transferred from the sun to plants then animal's eat plants

The reaction which is a self-sustaining series of chemical reactions in which the products of one reaction are the reactants in the next reaction is chain reactions.

Reactants are those species which are present at the initial state of the reaction and at the end of the reaction we obtain products.

If in any chemical reactions, reactants are combined for the formation of products and for the further process obtained product will act as reactant and that chemical reactions are known as chain reactions. Because this process continues for long time.

Hence correct option is chain reactions.

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Answer:

chain

Explanation:

edge 2023

Considering the definition of molar mass, the number of moles of Zn reactant used is 2 moles.

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The balanced reaction is:

Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)

Assume that 130.8 grams of Zn was used in this reaction.

To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used.

So to determine the number of moles used you know that the molar mass of Zn is 65.37[tex]\frac{g}{moles}[/tex]. Then:

[tex]molar mass=\frac{mass}{number of moles}[/tex]

[tex]65.37\frac{g}{moles} =\frac{130.8 g}{number of moles}[/tex]

Solving:

number of moles× 65.37[tex]\frac{g}{moles}[/tex]= 130.8 g

[tex]number of moles=\frac{130.8 g}{65.37\frac{g}{moles}}[/tex]

number of moles≅ 2 moles

Finally, the number of moles of Zn reactant used is 2 moles.

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Answer:

Iron will disolve in acid. The acid eats away at the iron. :)

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A. water per day: 20 m/ height: 24cm/ mass: 3.1g B. Water per day: 60 ml/ height: 24cm/ mass: 9.6g

I think that the answer to this question is the third option. These two plants are of the same height but plant B has more mass. So therefore the statement is not true.

If this is a multiple-choice, then I would also select the fourth option along with the third. Plant B received more water, but it is the same height as plant A.

I hope my answer is satisfactory, and that I was of help to you.

-Toremi

Considering the definition of pH, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.

pH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:

pH= - log [H⁺]

The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

In this case, you know:

Replacing in the definition of molarity:

[tex]Molarity=\frac{0.1 moles}{1.250 L}[/tex]

Solving:

Molarity= 0.08 [tex]\frac{moles}{liter}[/tex]= 0.08 M

Hydrochloric acid is a strong acid, so in aqueous solution it will be totally dissociated. So the concentration of protons is equal to the initial concentration of acid. This is: [H⁺]= [HCl]= 0.08 M

Replacing in the definition of pH:

pH= - log (0.08 M)

Solving:

pH= 1.0969

Finally, the pH of 3.65 grams of HCl dissolved in 1250 mL distilled H₂O is 1.0969.

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They will move backward at a lower speed than the basketball moves forward.

The principle of conservation of linear momentum states that the sum of the initial momentum is equal to sum of final momentum.

Initial momentum = Final momentum

The forward momentum of the basketball = Backward momentum of the person and the chair

Since the mass of the person and the chair is greater than the mass of the basketball, the person and the rolling chair will move backward at a lower speed than the basketball moves forward.

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Answer:

D

Explanation:

Does not require energy ...may be slow or fast....

Answer:

121.3 ml

Explanation:

Mole wts

Na    22.989 x 2

C    12.011

O 15.999 x 3      total = 105.986

45 grams is   45/105.986 of a mole

    45/105.986  in one liter would be .424584 M

   .424585 mole / x liter = 3.5

   x = .1213 liter = 121.3 ml

Answer:

the answer is chemical change because the act of rusting changes the substance of iron

Explanation:

Answer: 3 moles

Explanation: Divide 54 by 18 to get 3.

For an impure sample of potassium hydrogen phthalate, the percentage of potassium hydrogen phthalate is

m'=39.3%

Generally, the equation for the mol base  is mathematically given as

mol base = M*V

mol base = 0.152*35.61

mol base = 5.41272 mmol

In conclusion

mass = mmol/1000*MW

m== 5.41272 /1000*204.22

m= 1.1053 g of KHP

Hence, m'=39.3%

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Answer:

i think this is right!

Explanation:

An example of a single replacement reaction occurs when potassium (K) reacts with water (H2O). A colorless solid compound named potassium hydroxide (KOH) forms, and hydrogen gas (H2) is set free. The equation for the reaction is: 2K + 2H2O → 2KOH + H.

An example of a double replacement reaction is the reaction between silver nitrate and sodium chloride in water. Both silver nitrate and sodium chloride are ionic compounds. Both reactants dissolve into their ions in aqueous solution.

Answer:

No

Explanation:

Mass affects the amount of gravity that acts on an object.

Answer:

Mass is determined by the quantity of matter in a physical object.

Mass is how much space something takes up, while weight is how much an object is acted on by a force because of gravity.

Explanation:

Gravity does not determine the mass of an object. For example, an object on the Moon would weigh less than it does on Earth because of the lower gravity, but it would still have the same mass. This is because weight is a force, while mass is the property that determines the strength of this force.

What's a combustion

It means hydrocarbon burns in presence of excess oxygen to produce carbon dioxide and heat

As solid state is converted to gaseous so randomness increases hence it's spontaneous

Combustion is the process of combining with oxygen to form water and carbon dioxide. It is an exothermic reaction and will release energy. Thus delta H for combustion is negative.

Enthalpy change of reaction is the change in heat absorbed or released by a reaction. If heat is absorbed by the system , the reaction is called endothermic and the change in enthalpy delta H is positive.

For a reaction which release energy, the change in enthalpy delta H will be negative and thus the reaction is said to be exothermic. Combustion is an exothermic reaction.

During combustion new bonds are formed between carbon and oxygen and carbon and hydrogen. Thus bond making is happend more than bond breaking. Bond breaking needs much energy than bond making.

Hence, the released energy is more form combustion and enthalpy change is negative. The process needs no more energy thus the reaction is spontaneous. Thus option C is correct.

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Answer:

This image attached should help:

Explanation:

The reason that food web contains all organisms is because it shows every relationship, where food chain shows a more basic one. And the reason that they both have producers, consumers, and decomposers, is because they bothat least highlight a part of the almost every aspect, although it leans more to food web.

here's the answer to the question in the image, I couldn't comment on the right question because a bot already did.

1. ant, love

active

2. dog, man

dormant

3. bug, ring

burning

4. dress, up

pressure

5. think, tiger

trinker

- Water is known to be the universal solvent because of its ability to dissolve more particles than any other liquid.

- Cohesion is the property of water to attract other molecules. This helps in making solutions that are essential for most life to propagate.

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Answer:

3

Explanation:

the answer is 3 because it is 3 for the o2 so 3 you have to pay more attention for the small ditails

In the RGB color model, each color is represented by a numerical code that is written in parentheses and separated by commas.

RGB is a color model with which it is possible to represent a color by mixing by adding the three primary colors of light.

A special feature of this model is that it is not a reference point for defining the color red, green, or blue because the same RGB values can display noticeably different colors on different devices.

To form a color, it must be taken into account that in the RGB model the incidence of each color (red, green or blue) is measured on a scale that goes from 0 to 255.

These values are represented in parentheses, separated by commas as shown in the image below:

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[tex]w = \text{Number of mols} \times \text{Molar mass}=4.8 \times 58.5=280.8~ g[/tex]

We know,

Molar Mass of Sodium= 23 and,

Molar Mass of Chlorine= 35.45

[tex] \therefore \text{Molar Mass of Sodium chloride= 58.44 }\text{g/mol}[/tex]

So, The Molar Mass in Grams=

[tex]58.44 \frac{\text{g}}{ \cancel\text {mol}} \times 4.80 \: \cancel\text{mol} \\ \\ \text{Mass of NaCl }= 280.51\: \text {gram}[/tex]

Answer:

50 years old

Explanation:

Antoine Lavoisier died by the guillotine at the age of 50 on May 8, 1794 in Paris.

Hope this helps...

- profparis

Answer:

Antoine Lavoisier died at the age of 50