what the symbol of sodium peroxide

Answer:

We should manage and conserve forest resources in Nepal.

Explanation:

Nepal is the second richest country in natural resources. We should all work together and conserve our natural resources. We can conserve and manage forests in Nepal by the following ways:

1. Proper rules and laws should be made as well as executed by our government.

2. Illegal activities regarding harm of forests and its resources should be totally band.

3. Awareness programmes should be conducted worldwide to aware our citizens regarding conservation of forests.

Answer:

mass is the amount of matter in an object

Explanation:

Answer:

Hi! I hope you're having a wonderful day, if not, I hope it gets better, much love and kindness! Be great!

The products of this reaction between aluminum and sulfuric acid are two: hydrogen and aluminum sulfate.

This concept refers to the substances obtained at the end of the reaction.

It means to make sure there are the same molecules in the reactants and products.

2Al + 3H2SO4 = Al2 (SO4)3 + 3H2

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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

The true statements is that nerve cells do not look like skin cells because they make up different organs and have different functions.

Cells are the basic functional and fundamental unit of any living organism.

Each and every cells that are present inside the body have same DNA, but they all have different function and different structures. As nerve cells are present only in the brain and spinal cord part and skin cells are present all over the body.

Hence both the cells are different as they have different functions.

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Answer:

The 2 ohm branch

Explanation:

Since the resistors are in parallel, they are each connected to the same volatage.   Since   I = V/R    you can see that the one with the smallest resistance will have the greatest current through it .

Answer:

Hard-boiled eggs can be preserved up to 7 days in the refrigerator.

Explanation:

Answer:

trueee is the answer heh need points

When a liquid is heated, the average kinetic energy of its particles will increase.

The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.

Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.

Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.

Average kinetic energy = 3KT/2

If temperature increases, kinetic energy also increases.

Therefore, When a liquid is heated, the average kinetic energy of its particles will increase.

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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

Answer:

6.02 x 1023

Explanation:

Its numerical value is 6.02 x 10 (23). Therefore, a 12.01 g sample of carbon contains 6.02 x 10 (23) carbon atoms.

Inhibition of protein synthesis is the mode of action done by most antifungal drugs.

Antifungals drugs inhibit the synthesis of ergosterol the main fungal sterol, polyenes which interact with fungal membrane sterols and 5-fluorocytosine inhibits macromolecular synthesis.

So we can conclude that inhibition of protein synthesis is the mode of action done by most antifungal drugs.

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Answer:

12 atm

Explanation:

First, let us convert Celcius into Kelvin: 28.0 °C = 301.15 K and 129.0 °C = 402.15 K

For this question we must employ the Combined Gas Law: [tex]\frac{P_1V_1}{P_2V_2}=\frac{n_1RT_1}{n_2RT_2}[/tex], where [tex]P_1[/tex] is the initial pressure and [tex]P_2[/tex] is the new pressure.

We know that intitially, P=9 atm, V=30 L, and T=301.15K. From our problem, only temperature and pressure changes, while the number of moles, volume and the gas constant, R, stay the same, so they are irrelevant.

Thus, the filled out Combined Gas Law would be:

[tex]\frac{9 atm}{P_2}[/tex]=[tex]\frac{301.15K}{402.15K}[/tex], where the volume, moles of gas, and R are cancelled out.

We can manipulate this equation to derive the new pressure. We find that

9atm≈0.74885[tex]P_2[/tex].  

This means that

[tex]P_2[/tex]≈9/0.74885≈12 atm

Taking into account the ideal gas law and the definition of molar mass, the molar mass of a 3.228 g sample of a gas if it occupies 3.21 L at 298 K and 1.25 atm is 19.66 [tex]\frac{g}{moles}[/tex].

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

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.

In this case, you know:

Replacing in the ideal gas law:

1.25 atm× 3.21 L = n× 0.082 [tex]\frac{atmL}{mol K}[/tex]× 298 K

Solving:

n= (1.25 atm× 3.21 L)÷ (0.082 [tex]\frac{atmL}{mol K}[/tex]× 298 K)

n= 0.1642 moles

So, the number of moles in this case are 0.1642 moles.

In this case, you know:

Then, considering the definition of molar mass, it is calculated as:

[tex]molar mass=\frac{3.228 g}{0.1642 moles}[/tex]

Solving:

molar mass= 19.66[tex]\frac{g}{moles}[/tex]

Finally, the molar mass of a 3.228 g sample of a gas if it occupies 3.21 L at 298 K and 1.25 atm is 19.66 [tex]\frac{g}{moles}[/tex].

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Explanation:

Haloalkanes and other compounds with the halogen atom bonded to either sp3-hybridized or sp2-hybridized carbon atoms (aryl and vinyl halides) react with magnesium metal to yield organomagnesium halides called Grignard reagents. Grignard reagents are usually prepared in diethyl ether (CH3CH2O─CH2CH3). An ether solvent is essential for the reaction. The French chemist Victor Grignard discovered this reaction in 1900, and it has been studied and used extensively ever since.

Grignard reagents form easily from 1°, 2°, and 3° alkyl halides, although their reactivities differ. Aryl and vinyl halides react somewhat more slowly, and the cyclic ether tetrahydrofuran (THF) is required to prepare Grignard reagents of these compounds. The higher boiling point of the cyclic ether provides more vigorous reaction conditions, but the rate of the reaction also increases because THF solvates the Grignard reagent better than diethyl ether.

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Molecular model of a complex of methyl-magnesium chloride, a Grignard reagent, in which two molecules of tetrahydrofuran, THF, are bound to magnesium. The model is based on the crystal structure.

The order of reactivity of the halogens in haloalkanes is I > Br > CI > > F. Organofluorides are so unreactive that they are never used to prepare Grignard reagents. Organohalogen compounds containing bromine and chlorine are readily available, and are commonly used to prepare Grignard reagents. Grignard reagents are used synthetically to form new carbon–carbon bonds. A Grignard reagent has a very polar carbon–magnesium bond in which the carbon atom has a partial negative charge and the metal a partial positive charge.

The polarity of the carbon–magnesium bond is opposite that of the carbon–halogen bond of haloalkanes. Because the carbon atom in a Grignard reagent has a partial negative charge, it resembles a carbanion, and it reacts with electrophilic centers such as the carbonyl carbon atom of aldehydes, ketones, and esters. We will discuss this chemistry extensively in later chapters.

Grignard reagents react rapidly with acidic hydrogen atoms in molecules such as alcohols and water. When a Grignard reagent reacts with water, a proton replaces the halogen, and the product is an alkane. The Grignard reagent therefore provides a pathway for converting a haloalkane to an alkane in two steps.

The molar mass of gas sample whose mass is 7.9g at Standard temperature and pressure is 26.4 g/mol.

Molar mass of any substance will be calculated by using the below equation:

M = W/n, where

M = molar mass

W = given mass

n = moles

First we calculate the moles of gas by using the ideal gas equation:

PV = nRT, where

P = standard pressure = 1 atm

V = volume = 6.7 L

n = moles of gas?

R = universal gas constant = 0.082 L.atm/K.mol

T = absolute temperature = 273K

On putting values, we get

n = (1)(6.7) / (0.082)(273)

n = 0.299 moles

Now we get the molar mass of gas by putting values on the first equation, we get

M = 7.9g / 0.299mol = 26.4 g/mol

Hence molar mass of given gas is 26.4 g/mol.

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Answer:

Individual.

Explanation:

The diagram is showing how the biosphere is composed of, ending at ecosystem. Within an ecosystem, there is a community. Within a community, there are different populations. In one population, there are individuals that make it up.

So, since individuals make up a population, populations making up a community, and communities making up ecosystems, you find your Q to be individual.

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-No one

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:

54 protons

Explanation:

51 electrons 'balance' the charge of 51 protons....but there is three more PLUS charges ......means three more protons

51 + 3 = 54

Answer:

the answer is 69

Explanation:

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have an awesome day -TJ

Answer:

3.99 moles Al₂O₃

Explanation:

The molar mass (g/mol) is used to convert between grams and moles. This value is calculated by taking the individual element molar masses from the periodic table, multiplying them by the corresponding subscripts, then adding them together. Al is 26.98 g/mol and has a subscript of 2. O is 16.00 g/mol and has a subscript of 3. So, the molar mass of Al₂O₃ is 101.96 g/mol.

2(26.98 g/mol) + 3(16.00 g/mol) =  101.96 g/mol

Since it is 101.96 grams PER one mole, the 101.96 is beside grams in the ratio. When setting up the conversion, you want grams in the demoninator (molar mass ratio) to cancel out the grams in the numerator (given value). Since the given number has 3 significant figures, the answer should also have 3 significant figures.

407 grams Al₂O₃          1  mole Al₂O₃
--------------------------  x   --------------------  = 3.99 moles Al₂O₃
                                     101.96 grams

Answer: Solid, liquid, and gas are the three phases of H2O that are listed in order of increasing entropy.

The haphazard motion of water molecules in molecular water gives it the maximum flexibility.

Answer:

They will balance each other out.

Explanation:

Strong acids are low on the pH scale, strong bases are high. Putting them together will bring it closer to the center of the scale, where they are equal.

Answer:

D. it results in an equilibrium mixture of reactants and products

Explanation:

took the test

It could destroy the crops by jumping all over them

Answer:

The more light an object absorbs, the more it heats up when it is exposed to light, which is why dark things get hot more quickly than light things if left out in the sun.

Answer:

dog

Explanation:

cats hide and break stuff pigs will probally stay outside all day and i ove dogs

I prefer a pig

Benefits of having a pig

- you can eat them

- they taste good

- they have bacon

- Richard

- they are good to eat

- they taste very good because of the bacon

- you can cook them

- they are good cooked

Answer:

the narrator means that before the universe was out forward to completion,

there were little things that came together to form other things

a typical example can be found in the big bang theory

Answer:The narrator is pointing out that energy is involved in every event, and each event can be described in terms of energy.

Explanation: