N2 + 3 H2 – 2 NH3 How many moles of nitrogen (N2) are required to get 6
moles of ammonia (NH3)? *

Answer:

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Answer:

Iiiiiiddddddkkkkkkkkkk

Explanation:

Answer:

second onw\e

Explanation:

Answer:

B. The bonds are polar and the molecule is nonpolar.

Explanation:

Each bond in the molecule is polar, as indicated by the partial charges on the atoms of the molecule. However, the four atoms are arranged symmetrically around the central atom. In this case, the effects of the partial charges on opposite sides cancel out. As a result, the molecule as a whole is nonpolar. If exposed to an electric field, the molecule will not orient itself in any particular direction.

Explanation:

The balanced equation for the reaction between NaOH and H2SO4 is given as;

2NaOH + H2SO4 → Na2SO4 + 2H2O  

2 mol of NaOH reacts with 1 mol of H2SO4

5g of NaOH was dissolved in 1000cm3.

Mass = 5 g

Molar mass = 40 g/mol

Volume = 1000 cm3 = 1 L

Number of moles = Mass / Molar mass

Number of moles = 5 / 40 = 0.125 mol

Molarity = Number of moles / Volume

Molarity = 0.125 / 1 = 0.125 M

25cm3 of this solution neutralized 28.3cm3 of solution containing 7.2gdm-3 of impure H2SO4.

CaVa / CbVb = Na / Nb ; where a = acid and b = base

Va = 28.3cm3

Vb = 25cm3

Ca = ?

Cb = 0.125 M

Na = 1

Nb = 2

I. The molarity of H2SO4

Solving for Ca;

Ca = CbVb * Na / (Va * Nb)

Cb = (0.125 * 25 * 1 ) / ( 28.3 * 2)

Cb = 0.0552 M

II. The concentration of the pure acid on gdm-3

Molarity = Mass conc / Molar mass

Mass Conc = Molarity * Molar mass

Mass Conc = 0.0552 * 98.079

Mass Conc = 5.41 g/dm3

III. % impurity of the acid

Percentage Impurity = Mass of pure / Mass of Impure   *  100

Percentage Impurity = 5..41 / 7.2 * 100

Percentage Impurity = 75.14%

answer:

millions of animals..

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Answer:

The spoon appears to be broken because of refraction. Refraction happens when light travels from one medium to another and changes speed and bends. This also causes objects to look different sizes and shapes when they are submerged in water.

Explanation:

To solve this, we must know the concept behind refraction. Therefore, due to refraction, the spoon handle look broken where it enters the surface of the water.

Refraction is the bending of a wave as it travels through different media. The two materials' different densities are what lead to the bending. Anytime a light beam enters a material with a differing refractive index at an angle, it refracts. This increase in speed causes a shift in direction.

Due of refraction, the spoon seems to be shattered. When light moves from one medium to another, its speed and direction shift, causing refraction. When items are submerged in water, this also makes them appear to be of varied sizes and forms.

Therefore, due to refraction, the spoon handle look broken where it enters the surface of the water.

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Answer:

Number of moles = 0.075 mol

Explanation:

Volume = 500.0 mL = 0.5 (Converting to L by dividing by 1000)

Molarity = 0.15 M

Number of moles = ?

The relationship between the quantities is given as;

Molarity  = Number of moles / Volume

Number of moles = Molarity * Volume

Number of moles = 0.15  * 0.5

Number of moles = 0.075 mol

Answer:

B

Explanation:

Behaviour therapy was popularized by the U.S. psychologist B.F. Skinner, who worked with mental patients in a Massachusetts state hospital.

Answer:

PV=nRT

Explanation:

P= Pressure

V= Volume

n= amount of substance (usually moles)

R= Ideal Gas Constant (8.314 J/mol*K

T= Temperature

✧ [tex] \underline{ \underline{ \large{ \tt{A \: N \:S \: W \: E \: R}}}} : [/tex]

[tex] \underline{ \underline{ \large{ \text{Molecular \: Formulaes}}}} : [/tex]

⇾ [tex] \large{ \text{Potassium \: Hydroxide : K \: OH}}[/tex]

⇾ [tex] \large{ \text{Sodium \: Chloride : NaCl}}[/tex]

⇾ [tex] \large{ \text{Sodium \: Hydroxide : NaOH}}[/tex]

⇾ [tex] \large{ \text{Calcium \: Chloride : CaCl}}[/tex]

⇾ [tex] \large{ \text{Sodium \: Bicarbonate} : \tt{Na ( HCO)_{ 3} }}[/tex]

---------------------------------------------------------

☥ [tex] \underline{ \underline{ \large{ \tt{ \: E \: X\: P \: L\: A\: N \: A \: T \: I \: O \: N}}} }: [/tex]

[tex] \underline{ \underline{ \text{Writing \: a \: molecular \: formula}}} : [/tex]

To write a molecular formula , the following steps are usually adopted only when we know the symbol and valencies of elements and radicals present in a molecule.

Step 1 : First , the name of the compound is written.

Step 2 : The symbols of basic and acidic radicals are written side by side.

Step 3 : The valency of each radical is written at the right upper corner of the symbol. The valency of one radical is transferred to another radical and it is written on the right hand side at the bottom corner. If necessary , L.C.M of the valencies us taken to get a simple whole number.

Step 4 : If a compound radical takes part in the molecular formula , the radical is enclosed in brackets and the valency number is written on the right side of the bracket at the bottom of the formula.

For instance :

[tex] \text{Calcium \: \: \: \: \: \: Sulphate}[/tex] [ compound ]

1. [tex] \sf{Ca \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: SO_{4} }[/tex] [ Symbol of basic and acidic radicals ]

2.We know : Valencies of calcium and sulphate are 2 and 2 respectively

3. [tex] \sf{Ca_{2} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: (SO_{4} )_{2} }[/tex] [ Valencies are exchanged and compound radical is enclosed in bracket ]

4.[tex] \sf{CaSO_{4}}[/tex] [ L.C.M is taken to get molecular formula of calcium sulphate ]

Hope I helped ! ♡

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☥ [tex] \underline{ \underline{ \mathfrak{Carry \: On \: Learning}}}[/tex] !! ✎

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Gave you the answers already but anyways good luck, do well :)

Answer:

it is formed by covalent bonds. the oxygen atom shares one elctron with each chlorine atom, forming single covalent bonds ( cl — o — cl )

Answer:

0.66g/mL

Explanation:

La densidad es una propiedad de la materia definida como la masa de una sustancia en un determinado volumen.

En este problema, podemos hallar la densidad sabiendo que la diferencia de masas del pic vacío y el pic lleno es la masa de la solución y que el volumen que ocupa es de 25mL:

Masa solución:

25g - 8.5g = 16.5g

Así, la densidad será:

16.5g / 25mL =

Answer:

Dark-colored mice are better able to hide from predators.

Explanation:

If all of the light mice are eaten, then there are none left to pass on the light-furred gene, meaning that there would be no offspring without dark fur.

The correct option for the given question about Evolution is Option D) "Dark coloured mice are better able to hide from their predators".

"Survival of the fittest" is explained in the Darwin theory.

It is identical to natural selection. You are regarded as one of the "fittest" if you possess the greatest features or are "fit" enough to live and adapt to your surroundings. However, the ability to reproduce is just as important as simply surviving. You are successful if you can survive and reproduce.

Thus we can conclude that Dark coloured mice are better able to hide from their predators and hence they also satisfies the theory of Darwin "The survival of the fittest" hence this is the reason why after few generation the majority of the mice have dark coloured fur.

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Answer:

theirs nothing there?!!!??!?!?!??!!?!?!?!?!??!?!??!?!?!??!?!

Explanation:

whys it just a blank picture

Answer:

-Warm air sinks, creating an area of low pressure.

Explanation:

Heat will weigh more, than cool air!

Answer: 3.6 x 1023 molecules and 0.143 Litres

Answer:

6 N.

Every thing has equal and opposite reaction.

Answer:

The answer is C I believe, I do not know for sure but I think that is the answer..

I'm sorry if I'm wrong.

Explanation:

Answer:

Hello

so ur answer is

56.74L

Explanation:

thanks... hope it helps

Answer: yes, it's soluble in water.

Answer:

carbon monoxide (CO)

Explanation:

carbon monoxide (CO) is oxidized because it gains oxygen to turn to carbon dioxide (CO2)

A sample of gas at 62.0°C occupies a volume of 4.80 L at a pressure of 2.90 atm. 0.506 moles of gas are contained in the sample.

Inside the World System of Units, the mole is indeed the unit of substance amount (SI). How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. There are precisely 6.022×10²³ elementary entities in a mole.

An elementary entity can be an atoms, a molecule, an ion, and ion pair, or a fundamental particle like an electron depending upon what the substance is. For instance, although having differing volumes and masses, 10 moles liquid water as well as ten moles of mercury both contain the same quantity of material, as well as the mercury includes exactly one atom with each molecule of water.

PV = nRT

n = PV/RT

P = 2.90 atm

V = 4.80 L

R = 0.08206 L atm / mol K

T = 62.0 + 273 = 335 K

n = (2.90 •4.80) / (0.08206 • 335)

   = 0.506 moles of gas

Therefore, 0.506 moles of gas are contained in the sample.

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CaO + 2H2O + Ca(OH)2 is a balance chemical equation. Therefore, option A is correct.

A balanced chemical equation is one that has the same number of atoms of each type in the reaction on both the reactant and product sides. In a balanced chemical equation, both the mass and the change are equal.

When a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants, according to the law of conservation of mass. As a result, the number of atoms in each element remains constant during the chemical reaction. As a result, the chemical equation must be corrected.

The chemical equation is said to be balanced if there are no inequalities. Every element in this example now has an equal number of atoms on both the reactant and product sides.

Thus, option A is correct.

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Answer:

10 atm.

Explanation:

Using the combined gas law equation as follows;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question,

P1 = 5 atm

P2 = ?

V1 = 4L

V2 = 2L

T1 = 25°C = 25 + 273 = 298K

T2 = 25°C = 298K

Using P1V1/T1 = P2V2/T2

5 × 4/298 = P2 × 2/298

20/298 = 2P2/298

Cross multiply

298 × 20 = 298 × 2P2

5960 = 596P2

P2 = 5960 ÷ 596

P2 = 10 atm.

Answer:

A

Explanation:

edge

Answer:

iron and carbon:steel:copper and tin: metal

Answer:

A

Explanation:

If a convergent boundary involves a continental landmass and an ocean basin, a subduction zone forms. Subduction occurs where a plate moves underneath the other.