1. How many particles are in 8.14 moles of Na?

2Na+2H2O----2NaOH+H2

Answer:

6 moles

Explanation:

According to stoichiometry and given chemical equation 2C₂H₆(g)+7O₂(g)→4CO₂(g)+6H₂O(l), 9 moles of water are produced when 3 moles of ethane are burned.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations.

In the given problem , as 2 moles of ethane produce 6 moles of water so according to stoichiometry

∴ 3 moles of ethane will produce 3×6/2=9 moles

Thus, 9 moles of water are produced when 3 moles of  ethane are  burned.

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Answer:

N203

Explanation:

Answer:

n203

Explanation:

Answer:

Brainliest-

Explanation:

The outer shell of electrons is full, so there is no need to gain or lose electrons.

The hydrogen and oxygen atoms are more stable in water molecules as they get a complete valence shell when they bonded with other atoms.

In a chemical reaction, two or more reactants react with each other under the chemical condition to form two or more products. The Chemical reaction is defined as a reaction two or more reactant components react with each other to form two or more products.

The water is formed by reacting hydrogen and oxygen. The chemical reaction of water formation is shown below.

[tex]H_2(g)+O_2(g)\longrightarrow H_2O(l)[/tex]

The balanced chemical equation can be defined as a reaction where the number of moles of reactants is equal to the number of moles of products.

[tex]H_2(g)+ \frac{1}{2}O_2(g)\longrightarrow H_2O(l)[/tex]

The hydrogen atoms have one electron and the oxygen has two electrons less than the complete valence shell. But in the water molecule, every atom has a complete valence shell so atoms become more stable.

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Answer:

0.125L or 125 mL

Explanation:

0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

A stock solution is a concentrated solution that will be diluted to a solution of lower concentration.

stock solution = diluted solution

Where, M1 = concentration in molarity (moles/Litres) of the   concentrated solution

V2 = volume of the concentrated solution,

M2 = concentration in molarity of the dilute solution

V2 = volume of the dilute solution.                                

The volume of 3.00M KI solution can be calculated using the dilution equation:

Given:

M1 = 3.00M, M2 = 1.25M, V1 = x, V2 = 0.300L

M1V1 = M2V2

3.00M(x) = 1.25M(0.300L)

           x = 0.125L

Hence, 0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

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Answer:

negative attraction

Explanation:

because a copper ion looses electrons, meaning it's negatively charged, and positives and negatives attract.

Answer: 0.119 mole of Kr has a mass of 10.0 g

Explanation:

The complete Question was ontained online, albeit, it was incomplete, even from the online source. But the solution is possible based on the part of the question obtained.

Complete Question

Which of the following Noble Gases has a mass of 10.0 g?

A. 2.02 mol Ne B. 0.119 mol Kr C.

Solution

Number of moles = (Mass)/(Molar Mass)

Mass = (Number of moles) × (Molar mass)

Checking the options, one at a time,

A. 2.02 moles of Neon

Number of moles = 2.02 moles

Molar Mass of Neon = 20.1797 g/mol

Mass = 2.02 × 20.1797 = 40.762994 g ≠ 10.0 g

Not the answer.

B. 0.119 moles of Krypton

Number of moles = 0.119 moles

Molar Mass of Krypton = 83.798 g/mol

Mass = 0.119 × 83.798 = 9.971962 g ≈ 10.

Explanation:

hope this helps have a great night ❤️❤️❤️

Answer: 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.

Explanation:

The balanced chemical equation is:

[tex]2B+3H_2\rightarrow 2BH_3[/tex]  

According to stoichiometry :

3 moles of [tex]H_2[/tex] produce = 2 moles of [tex]BH_3[/tex]

Thus 27.0 moles of [tex]H_2[/tex] will produce=[tex]\frac{2}{3}\times 27.0=18.0 moles[/tex]  of [tex]BH_3[/tex]

Thus 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.

Answer:

La distancia recorrida por el móvil es 228.600 m

Explanation:

El movimiento rectilíneo uniforme MRU es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante. Es decir:, en este caso el movimiento es lineal en una única dirección  y la velocidad de desplazamiento es constante.

La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello mediante la expresión:

[tex]velocidad=\frac{distancia}{tiempo}[/tex]

En este caso:

Reemplazando:

[tex]25 \frac{m}{s} =\frac{distancia}{9144 s}[/tex]

y resolviendo obtienes:

distancia= 25[tex]\frac{m}{s}[/tex] *9144 s

distancia= 228.600 m

La distancia recorrida por el móvil es 228.600 m

A movement is rectilinear uniform when an "object" (for example) travels in a straight path at a constant speed, given that its acceleration is zero.

Velocity (v) = 25m/s

Distance (d) = ?

Time (t) = 2.54hr = 9,144 s

Looking at the data, we see that the time is in hr, but we need it in seconds. Therefore we do a conversion from hours to minutes, taking into account that 1 hour is equal to 3600 seconds.

To calculate the distance traveled by the mobile, the speed is multiplied by the time taken.

For this the following formula is applied:

We apply the data in the formula; to solve for the distance.

Answer: The distance traveled by the mobile is 228,600 meters.

Answer:

9302 moles of CO contain 5.60×10²⁷ molecules

Explanation:

We solve this with Avogadro's number.

NA = 6.02×10²³

This number states the how many particles are in 1 mol of anything.

1 mol of atoms contains 6.02×10²³ atoms

1 mol of molecules  contains 6.02×10²³ molecules.

We apply a rule of three:

6.02×10²³ molecules are contained in 1 mol of CO

Then, 5.60×10²⁷ molecules may be contained in (5.60×10²⁷ . 1) / 6.02×10²³

= 9302 moles

Answer:

???

Explanation:

i would help answer but your post has no diagrams or at least there not showing up

I believe it's better for it to be more abundant because it's better to have more then less. Take water as an example. Water is an important factor to our survival and if we didn't have enough of that we would be in trouble.  Or if we needed food but there wasn't enough more people would be dying from starvation. It's better to have a little more than a little less.

Answer:

I believe the answer is A: *It is the simplest form of matter" not 100% sure but I think that's correct

Explanation:

Answer:

C is the correct answer

I hope this helps you:)

Explanation:

C slower, and the substance will be a liquid

Answer:

525.1 g of BaSO₄ are produced.

Explanation:

The reaction of precipitation is:

Na₂SO₄ (aq) + BaCl₂ (aq) →  BaSO₄ (s) ↓  +  2NaCl (aq)

Ratio is 1:1. So 1 mol of sodium sulfate can make precipitate 1 mol of barium sulfate.

The excersise determines that the excess is the  BaCl₂.

After the reaction goes complete and, at 100 % yield reaction, 2.25 moles of BaSO₄ are produced.

We convert the moles to mass: 2.25 mol . 233.38 g/mol = 525.1 g

The precipitation's equilibrium is:

SO₄⁻² (aq)  +  Ba²⁺ (aq)  ⇄  BaSO₄ (s) ↓       Kps

525.1 0 g of BaSO₄ are produced.  

The reaction of precipitation is:

Na₂SO₄ (aq) + BaCl₂ (aq) →  BaSO₄ (s) ↓  +  2NaCl (aq)

Ratio is 1:1. So 1 mol of sodium sulfate can make precipitate of 1 mol of barium sulfate.

Molar mass of [tex]BaSO_4[/tex] is 233.38 g/mol

The formula for the number of moles is as follows:-

[tex]Number\ of\ moles=\frac{Mass}{Molar\ Mass}[/tex]

[tex]Mass=2.25\ moles\times233.38\ g/mol\\=525.10\ g[/tex]

So, 525.10 g of barium sulfate be precipitated.

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Answer:

Multicellular

Explanation:

Prokaryotic cells are unicellular because the do not have a nucleus and lack organelles, while eukaryotic cells do have a nucleus, have organelles, and are are multicellular. :)

Organisms that are made up of prokaryotic cells are NOT

Multicellular.

Living organisms can be classified based on their cellular organisation.

Organisms that are made up of one cell are known as unicellular organisms.

Organisms that are made up of more than one cell are known as multicellular organisms.

A prokaryote is an organism that lacks distinct nucleus while eukaryote is an organism that possess a nucleus that is enclosed in a nuclear envelope.

While prokaryotes are always unicellular organisms, eukaryotes can be either unicellular or multicellular.

Therefore, organisms that are made up of prokaryotic cells are not multicellular.

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Answer: 10 always love yourself

Explanation:

Answer:

molar mass= 180

Explanation:

molar mass = (6×12) + (12×1) + (6×16) = 180

Answer:

Salad dressing made with oil vinegar, and herb is a homogeneous mixtures. Because heterogeneus mixture is composed of two or more components which are unequal distributed.

But in normal salad it's heterogeneous

Answer:

45/9 or 5

Explanation:

the oil which relative amount is greater than demand is fuel oil, whose fraction is 45/9

Answer:

25.0g is the mass of sulfur

Explanation:

The sulfur and the oxygen are 50:50. That means there is 1 mole of S per mole of O.

To solve this question we need to convert the mass of O to moles, as moles of O = Moles of S, we can find the moles of S and its mass:

Moles O = Moles S:

12.5g O * (1mol / 16g) = 0.781 moles

Mass S:

0.781 moles * (32g / mol) =

Answer:

48.2 Fahrenheit

Explanation:

Temperature change = 9*C

By how many degrees Fahrenheit did the temperature change?

The relationship between Fahrenheit and degree Celsius is given as;

F = (9 / 5) C + 32

Inserting the value of C;

F = (9 / 5) * 9 + 32

F = 48.2 Fahrenheit

Answer:

When a solid dissolves the solid and the liquid they form a mixture called a solution.

Answer:

0.0345kg is the mass of 25L of the sample

Explanation:

Hydrophosphoric acid, H₃P = Phosphine has a density of 1.38g/L.

To solve this question we need to convert the volume of the gas to mass in grams as first and then to kilograms as follows:

Mass in grams:

25L * (1.38g / L) = 34.5g

Mass in kilograms:

34.5g * (1kg / 1000g) = 0.0345kg is the mass of 25L of the sample