Cations are formed when neutral atoms lose neutrons positrons protons electrons

The mole fraction of sulfur hexafluoride gas X(SF₆) = 0.361 and the mole fraction of dinitrogen difluoride gas X(N₂O) = 0.639

moles of each gas

n = m / M

where,

n: moles and m: mass, M: molar mass

SF₆: 16.7 g / 146.06 g/mol = 0.114 mol

N₂O: 8.88 g / 44.01 g/mol = 0.202 mol

The total number of moles is 0.114 mol + 0.202 mol = 0.316 mol

To calculate the mole fraction of each gas

X = moles of gas / total number of moles

X(SF₆) = 0.114 mol / 0.316 mol = 0.361

X(N₂O) = 0.202 mol / 0.316 mol = 0.639

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The stratosphere, which can be found above the troposphere and below the mesosphere, is the second layer of the Earth's atmosphere (/straetsfr, -to-).

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Potassium fluoride and sodium hydroxide react to produce potassium hydroxide and sodium fluoride respectively. Option 2.

Potassium fluoride and sodium hydroxide undergo a double decomposition reaction. They exchange radicals to produce potassium hydroxide and sodium fluoride respectively according to the following equation:  

[tex]KF + NaOH --- > KOH + NaF[/tex]

Potassium is able to displace sodium from sodium hydroxide because it is higher on the reactivity series of metals than sodium.

Thus, the product of the reaction of potassium fluoride and sodium hydroxide are [tex]KOH[/tex] and [tex]NaF[/tex].

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The amount of water needed to be added to prepare the solution would be 0.94 liters.

When diluting solutions, the number of moles of solutes before dilution must be equal to the number of solutes after dilution. The only thing that changes are the volume and concentration.

Thus, the equation of dilution is:

[tex]m_1v_1[/tex] = [tex]m_2v_2[/tex]

Where

In this case:

[tex]m_1[/tex] = 5 M, [tex]m_2[/tex] = 0.3 M, and [tex]v_2[/tex] = 1000 mL

Substituting:

5[tex]v_1[/tex] = 0.3 x 1000

    [tex]v_1[/tex] = 300/5

        = 60 mL

This means that the volume of the stock solution to be taken is 60 mL. The amount of water to be added would then be:

1000 - 60 = 940 mL

940 mL = 0.94 L

In other words, the amount of water needed to be added to prepare 1000 mL of 0.3M NaCl from a 5 M NaCl stock solution is 0.94 L.

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Answer:

Mg+HCl = MgCl+H2

Explanation:

you just have to write the correct formula of these elemernt

Answer:

Magnesium sulfide

Explanation:

The number of way to select people from a total of a people is a! /b!·(a-b)!

plugging in 15 for A and 6 for B

P= 15! / 6!(15-6)!

P= 1307674368000 / 720·9!

P= 1307674368000 / 362880

P= 360360

By choosing some items from a set and creating subsets, permutation and combination are two approaches to represent a group of objects. It outlines the numerous configurations for a particular set of data. Permutations are the selection of data or objects from a set, whereas combinations are the order in which they are represented. Both ideas are critical to mathematics.

Here, the differences between permutation and combination are described in detail. Here, we'll talk about both subjects with formulas, examples from everyday life, and questions that have been answered. Students can also work on the Permutation and Combination Worksheet to improve their understanding of this subject and learn shortcuts for answering additional questions.

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The arrow that represents the change of state that has been described is L.

We know that there are three states of matter of matter and these are the solid, the liquid and the gas. We know that in the solid state, the particles that compose matter are all joined together and they are held in fixed positions and can not be able to slide past one another.

As such, we have been shown the diagram that shows the way that the energy is transferred between the states of matter in the image that is attached to this answer.

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Answer:

Its A

Explanation:

I got it right

Answer:

salad

Explanation:

Answer:due to unequal heating

Explanation:

The experimental set up in B is to observe the growth the green beans without the addition of fertilizer. Thus, we can compare the growth of the plant with and without fertilizer and thereby we can understand the effect the fertilizer on the plant growth.

Fertilizers are chemical substances used to nourish the plants by making the soil rich in nutrients and minerals. Plants needs minerals along with water such as potassium, calcium, phosphorous, nitrogen etc.

Sometimes the soil comes deficient of these minerals and we have to fertilize the soli by the addition of the chemicals containing these minerals. Hence, fertilizers provide a nutrient rich soil for plant growth.

The experimental set up with fertilizer added plant and the second one (B) without fertilizer helps to compare the growth in both conditions and we can clearly understand how fertilizers effect the growth of plants by comparing the plant growth in A and B.

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The rate of effusion of substance A is 3 times the rate of effusion of substance B, and molar mass of A is 4g/mol, then molar mass of B is 36g/mol.

Graham Law:

The rate of effusion of a gaseous substance is inversely proportional to the square root of its molar mass. This is called Graham's Law

R = k/√M

where k is constant and m is molar mass of the substance.

rate of effusion of substance A is 3 times the rate of effusion of substance B.

molar mass of substance A is 4.00g/mol

Ra = 3Rb

Ra/Rb = √Mb/√Ma

3Rb/Rb = √Mb/√4

3 = √Mb/2

√Mb = 6

Mb = 36

so, molar mass of substance B is 36g/mol.

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The amount, in moles, of chlorine that would be present in 3 moles of [tex]MgCl_2[/tex] would be 6 moles.

[tex]MgCl_2[/tex] is made from magnesium and chlorine molecules according to the following equation:

[tex]MgCl_2 --- > Mg^{2+} + 2Cl^-[/tex]

From the above equation, 1 mole of [tex]MgCl_2[/tex] is made up of 1 mole of Mg and 2 moles of Cl.

Following this established ratio, the amount of chlorine that would be present in 3 moles of  [tex]MgCl_2[/tex] can be calculated as follows:

1 mole [tex]MgCl_2[/tex] = 2 moles of Cl

3 moles  [tex]MgCl_2[/tex] = 2 x 3/1

                           = 6 moles of Cl

In other words, 6 moles of Cl would be present in 3 moles of [tex]MgCl_2[/tex].

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If 22 g acetaminophen (151.163 g/mol) was generated. The percent yield of the reaction is 72.78 %.

Calculation :

C₆H₇NO  +  C₄H₆O₃  --> C₃H₉NO₂ + C₂H₄O₂

0.20 moles   0.25 moles    22g

limiting reagrnt  --> C₆H₇NO

from reaction equation

.20 mol of acetaminophen = .20*151.163 = 30.23 g

% yield = (practical/ theoritical)yield* 100 = 72.78 %

reaction yield. The reaction yield (absolute yield) of a chemical reaction is the amount of pure, dry product recovered from the reaction. Relative yield or percent yield (%) is commonly calculated to measure the efficiency of chemical reactions in organic synthesis.

Yield, also called reaction yield, is a measure of the molar amount of product to reactant consumed in a chemical reaction, usually expressed as a percentage.  Yield is one of the main factors that scientists must consider in organic and inorganic chemical synthesis processes. [2] In chemical reaction engineering, “yield,” “conversion,” and “selectivity” relate to unwanted products, how much of the starting material is consumed (conversion), how much of the desired production A term used to describe the rate at which something is formed (yield). (selectivity) represented as X, Y, and S

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Air pressure is D.low at the top hight at the bottom.

Pressure is the force that the air applies to the ground when gravity acts on it. At sea level, there is typically a pressure of 1013.25 millibars, or 14.7 pounds per square inch.

High pressure frequently heralds sunny, dry weather. Clouds and precipitation are frequently indicative of low pressure. Air that is sinking is related with high pressure. Because it is pushing DOWN on the ground, air pressure is higher.

High barometric pressure exerts additional pressure against our bodies, which restricts how much tissue can expand. On the other hand, when air pressure is low, our body's tissues can expand more, which results in more pressure.

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Neil Bohr used the fluorescent screen and an alpha particle detector to study the structure of an atom.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

The atom as a whole is neutral and stable due to presence of oppositely charged particles.

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Answer: A balanced nuclear equation for the fusion of helium-4 to form carbon-12 would be:

He-4 + He-4 -> C-12 + energy

In this equation, two helium-4 atoms fuse to form a single carbon-12 atom and release energy. This process would occur in the core of the Sun once it has exhausted its supply of hydrogen and begins to fuse helium-4.

16 is the mass of this atom.

The Oxygen (O) has an atomic number of 8 and has a mass number of 16. Upon accepting 2 electrons it becomes O2-. The mass number is defined as the sum of the number of protons and neutrons present in the molecule. So here for O2- it contains 8 protons,8 neutrons and 10 electrons.

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Democritus said matter can not be divided indefinitely, Aristotle said that matter was made of four elements while John Dalton proposed a modern atomic model based on experimentation. Rutherford said atoms are mostly empty space, Thompson brought about negative electrons in a positive framework.  Bohr said that electrons orbit the nucleus in “shells.

There are many atomic models that was proposed which includes:

Rutherford in his experiment shot alpha (α) particles at gold foil whereby most particles passed through.

Hence he concluded the following:

Some positive α-particles deflected or bounced back.

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It is false that a helium atom fusing with a hydrogen atom is the initial stage in the hydrogen-burning process.

Four hydrogen protons and two electrons are used in the basic hydrogen fusion cycle, which results in the creation of a helium nucleus, two neutrinos, and six photons. The first stage in this three-phase process is the fusion of hydrogen into deuterium. In this collision of two protons, one proton decays into a neutron, which releases an antielectron and a neutrino.

The last proton joins the neutron to form a heavy hydrogen (deuterium) nucleus, and the newly created antielectron will annihilate with an electron to generate two very high-energy photons.

A proton is grabbed by a deuterium nucleus, which subsequently emits a photon and forms a 3He nucleus, in the second phase of the synthesis of helium-3.

The third phase involves recombining two helium-3 atoms into a single helium nucleus while emitting two protons.

Take note that for every time step 3 happens, steps 1 and 2 each occur twice. The total net energy released during this process is 26 MeV.

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The crash where the cone experience a stronger force is option D because: Crash 1: the force on the black hockey puck was stronger in this crash, so the force on the cone was also stronger.

The ball is drawn back to Earth by gravitational force. The ball returns to Earth as a result of friction. The ball is forced back toward Earth by magnetic force.

A puck's velocity changes when a player makes contact with it when it is still. He causes the puck to speed up, in other terms. The hockey stick's force, which causes the acceleration, is responsible. The velocity grows as long as this force is in motion.

Therefore, the force applied to an object must be larger than what is required for a progressive slowing down if the object must be slowed down quickly. For instance, a bicycle's brakes will slow or stop it more quickly the more force is given to it.

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See full question below

After hockey practice, Carissa and Keenan were playing a game where they were pushing some objects to get them to crash. They were using a cone and two different pucks—a black one with more mass for Crash 1 and a blue one with less mass for Crash 2. They want to know what happened to the cone.

Use the information from the diagram to answer.

In which crash did the cone experience a stronger force? How do you know?

answer choices

There was no force on the cone. In both crashes, only the hockey puck experienced a force.

The diagram doesn’t tell you anything about the force on the cone. It only gives information about the force on the pucks.

It was the same force in both crashes; the hockey puck changed speed by the same amount in each crash, so the force on the cone was the same each time.

Crash 1; the force on the black hockey puck was stronger in this crash, so the force on the cone was also stronger.

Explanation:

Fermentation: When yeast is added to the dough, it begins to ferment the sugars present in the dough, producing carbon dioxide and ethanol. The carbon dioxide helps to leaven the dough, while the ethanol is mostly evaporated during baking.

Maillard reaction: During baking, the heat causes a reaction between the amino acids and sugars in the dough, producing a wide range of compounds that give bread its characteristic flavor and aroma. This reaction is known as the Maillard reaction.

Protein denaturation: The heat of baking causes the proteins in the dough to denature, or lose their native conformation. This helps to give bread its texture and structure, and also contributes to the development of its crust.

Answer:

More mass means more force is needed to achieve the same change in speed in the same amount of time. That force is transmitted from the road, to the tires, to the wheels, through the brakes, to the frame and rider.

The weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

Acceleration is defined as the rate of change of velocity of an object with respect to time. These are vector quantities which have magnitude as well as direction.

The orientation of the acceleration of an object as given by the orientation of the net force acting on that object. It is expressed as:

[tex]\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}\overline{a} = average acceleration\\v = final velocity\\v_0 = starting velocity\\t = elapsed time[/tex]

Acceleration is proportional to the force applied, so the greater the force, the greater the speed of the object in the direction of the force. Mass is inertia, which is the reluctance to accelerate, so for the same force, more massive objects experience smaller acceleration than less massive objects.

Thus, the weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

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In order to precipitate the calcium ions as calcium oxalate, a 2.00g sample of limestone was first dissolved in hydrochloric acid until all of the calcium was transformed to Ca²⁺ (aq). This was followed by the addition of excess ammonium oxalate solution, (NH₄)₂C₂O₄(aq). Filtered, dried, and weighed to a consistent mass of 2.43g. The percentage by mass of calcium in the limestone sample is 31.25%

The percentage by mass of calcium in the limestone can be calculate as follows:

Mass of precipitate that is calcium oxalate = 2.43 g

Moles of calcium oxalate = 2.00g /128 g/mol = 0.015625 moles

One mole of calcium atoms make up one mole of calcium oxalate.

so, 0.015625 moles calcium oxalate equal to 0.015625 moles calcium atoms

Mass of  0.015625 moles of calcium :

0.015625 mol × 40 g/mol = 0.625 g

Mass of sample of limestone = 2 g

Percentage of calcium in limestone:

(0.625 g/2 g) x 100 = 31.25%

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Sedimentary rock layers are referred to as rock strata.

A rock is a dense mass of mineral grains that have grown or been cemented together over time. There are big rocks and little rocks. Pebbles are little rocks.

The sediment grains that are deposited by water, wind, or ice become sedimentary rocks. They are always formed in layers and are referred to as "beds" or "strata," and frequently include fossils.

Weathering, erosion, deposition, compaction, and cementation are the processes that result in the formation of these horizontal layers. Newer layers are deposited and created during this process on top of older layers, allowing for the relative dating of each layer.

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Magnesium and calcium are 2nd group elements with 2 valence electrons. They are metals in room temperature and easily lose these electrons to nonmetals such as oxygen.

Magnesium is 12th element in periodic table. It is 2nd group element and is a called alkaline earth metals. Its group members are calcium, strontium, and barium.

They contains 2 valence electrons which can be easily lost to a non-metal. Oxygen is highly electronegative element and it contains 6 valence electrons and need two more electrons to achieve octet.

Al is 13th group element it is not as much electropositive as alkaline earth metals. It contains 3 valence electrons and thus it need to lose all these 3 electrons to achieve octet. Hence, Al is less reactive towards O2 in comparison with Mg and Ca.

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The molecules of ammonia in your reaction. the grams of ammonia will you make is 2.39 g.

given that :

the no. of molecules of the ammonia : 8.41 × 10²⁴

molar mass of ammonia : 17 g /mol

no. of molecules = (mass / molar mass ) × Avogadro's number

8.41 × 10²⁴ = (mass / 17 ) × 6.022 × 10²³

mass = 17 / 7.1

mass = 2.39 g

Thus,  a reaction which will make ammonia as a product. you predict that you should make 8.41 × 10²⁴ molecules of ammonia in your reaction.  grams of ammonia will you make is 2.39 g.

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the empirical composition of this substance Its molecular weight has also been calculated to be around 156.

the molecular equation Response: CGHG.

Calculate the grams of carbon and hydrogen in 4.40 g of CO2 and 2.70 g of H2O, respectively.

4.40 g x (12.011 g/44.0098 g) = 1.20083 g of carbon

2.70 g times (2.0158 g / 18.0152 g) Equals 0.3021482 g of hydrogen

2) Calculate the corresponding number of moles from the grams of C and H molecular weight..

20083 g / 12.011 g/mol = 0.09998 mol of carbon

In terms of hydrogen, 0.3021482 g / 1.0079 g/mol equals 0.2998 mol

3) To break up the molar amounts listed above into smaller, more manageable amounts, divide each one by its lowest value.

numbers.

0.09998 mol/0.09998 mol = 1 for carbon.

hydrogen: 0.298 mol/0.0998 mol = 2.9986 mol = 3

We have now discovered the solution: the substance's empirical formula is CGHG

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Answer:

solubility

Explanation:

the solid substances will be added to water to see which one is soluble

Colligative qualities include boiling point elevation, freezing point depression, and vapor pressure reduction. Color and density are non-colligative qualities.

Colligative qualities are those that rely on the number of particles of solute rather than the composition of the solute.

An example of a colligative property:

Reduced vapor pressure

Boiling point at an elevation

a drop in the freezing point

The osmotic pressure

Non-colligative qualities are those that are determined by the nature of the solute and solvent.

Non-colligative qualities include:

Viscosity

The surface tension

Density

Solubility

As a result, we may deduce that boiling point elevation, freezing point depression, and vapor pressure reduction are all colligative qualities. Color and density are also non-colligative qualities.

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