Plz I need help with my chemistry homework jJnsjs​

Answer:

The chemical reaction is a Double Displacement

Explanation:

Balance the reaction of KOH + AlCl3 = KCl + Al(OH)3

Answer:

See Explanation

Explanation:

Let us consider the first two reactions, the initial concentration of CO was held constant and the concentration of Hbn was doubled.

2.68 * 10^-3/1.34 * 10^-3 = 6.24 * 10^-4/3.12 * 10^-4

2^1 = 2^1

The rate of reaction is first order with respect to Hbn

Let us consider the third and fourth reactions. The concentration of Hbn is held constant and that of CO was tripled.

1.5 * 10^-3/5 * 10^-4 = 1.872 * 10^-3/6.24 * 10^-4

3^1 = 3^1

The reaction is also first order with respect to CO

b) The overall order of reaction is 1 + 1=2

c) The rate equation is;

Rate = k [CO] [Hbn]

d) 3.12 * 10^-4 = k [5 * 10^-4] [1.34 * 10^-3]

k = 3.12 * 10^-4  /[5 * 10^-4] [1.34 * 10^-3]

k = 3.12 * 10^-4/6.7 * 10^-7

k = 4.7 * 10^2 mmol-1 L s-1

e) The reaction occurs in one step because;

1) The rate law agrees with the experimental data.

2) The sum of the order of reaction of each specie in the rate law gives the overall order of reaction.

Answer:

Thermal energy is heat energy.

When it is removed, the temperature of particle decreases due to decrease in the internal energy involving that particle.

Motion of the particle decreases due to decrease in kinetic energy caused by reduction in the internal energy.

The state of the particle changes from that current state e.g liquid or gas to a solid state due to increase in the latent heat of vapourisation.

With thermodynamics we can find that by giving energy to a substance the temperature increases and after a certain value it can change from solid to liquid and vapor state

In the opposite case, as the energy of a substance decreases, the temperature decreases and goes from a gaseous state to a liquid and a solid.

Thermodynamics study the changes that substances have as their energy changes, finding macroscopic relationships such as temperature, state, pressure and volume.

The temperature of a substance is a measure of the internal energy of the particles and the thermodynamic state of a substance can be solid, liquid or gaseous depending on whether the shape and volume is maintained.

Let's analyze what happens when we increase the energy of a substance.

In this case, the particles that form has more energy, so the temperature of the substance increases, if the energy is enough to break any bonds, the substance can go from the solid state to the liquid and by continuing to increase the energy it can be break all the bonds going from the liquid to the gaseous state.

In the opposite case, when the energy of the particles decreases, it has smaller movements, therefore its temperature decreases and if some bonds are formed, the substance stops from the gaseous state to the liquid state and if the energy continues to decrease, more bonds are formed passing the liquid state to solid.

In conclusion, with the change in energy, the temperature changes in the same direction and after a certain value it can go from solid to liquid and as the temperature increases more it can go from liquid to gas.

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Las sustancias a la izquierda de la flecha en una ecuación química se denominan reactivos. Un reactivo es una sustancia que está presente al comienzo de una reacción química. Las sustancias a la derecha de la flecha se denominan productos.

Answer:

See the answer below

Explanation:

When silver is added to dilute sulphuric acid, no reaction would occur. However, silver reacts with hot and concentrated sulphuric acid to produce silver sulphate, sulphur dioxide, and water.

The equation of the reaction is as below:

silver + sulphuric acid --> silver sulphate + water + sulphur dioxide

[tex]2Ag(s) + 2 H_2SO_4(aq) -->Ag_2SO_4 (s) + 2 H_2O (l) + SO_2 (aq)[/tex]

Answer:

from one metallic element to a different nonmetallic element

Explanation:

For example NaCl is ionic compound in which Na metal donate electron to Cl non metal

Answer:

[tex]\frac{4}{5}[/tex] moles

Explanation:

The reaction equation is given as:

      4NH₃   +  5O₂  →  4NO  +  6H₂O

The number of moles of O₂ that completely reacted is given as 1 mole

To solve this problem, we are going to use a stoichiometric approach from the balanced reaction equation:

         5 moles of O₂ will react completely to produce 4 moles of NO

        1 mole of O₂ will therefore react to produce  x mole of NO

               5x  = 4

                 x  = [tex]\frac{4}{5}[/tex] moles of NO

Answer: 0.80 mole

Explanation:

Answer:

In space ( the sun and it's atmospheres )

The number of protons and neutrons in the nucleus​ : 92 and 146

Given

Mass number = 238

Atomic number = 92

Required

Protons and neutrons

Solution

Mass number=number of protons + neutrons

Atomic number=number of protons=number of electrons

Atomic number = 92⇒number of protons=92

Number of neutrons = mass number - atomic number

Number of neutrons = 238 - 92 = 146

Answer:

c

Explanation:

c

Answer:

Rubbing the comb caused static electricity to build up, so it attracted the water.

Answer:

Salt has long been used for flavoring and for preserving food. It has also been used in tanning, dyeing and bleaching, and the production of pottery, soap, and chlorine. Today, it is widely used in the chemical industry.

Answer:

Mass = 72.52 g

Explanation:

Given data:

Mass of hydrogen phosphate produced = ?

Mass of P₂O₅ react = 105.9 g

Solution:

Chemical equation:

P₂O₅ + 3H₂O     →     2H₃PO₄

Number of moles of P₂O₅:

Number of moles = mass/molar mass

Molar mass of P₂O₅ 283.9 g/mol

Number of moles = 105.9 g/ 283.9 g/mol

Number of moles = 0.37 mol

Now we will compare the moles of P₂O₅ with H₃PO₄ from balance chemical equation.

                     P₂O₅        :         H₃PO₄

                         1           :           2

                      0.37        :        2/1×0.37= 0.74 mol

Mass of H₃PO₄ :

Mass = number of moles × molar mass

Mass = 0.74 mol ×  98 g/mol

Mass = 72.52 g

Answer:

divide the moles by gram to get molar mass

use calculator and get yo ans

Answer:

[tex]P_2=3312torr[/tex]

Explanation:

Hello!

In this case, since here we have a pressure-temperature relationship, we need to use the Gay-Lussac's law in order to compute the final pressure as they are in a directly proportional relationship:

[tex]\frac{P_2}{T_2} =\frac{P_1}{T_1}\\\\P_2= \frac{P_1T_2}{T_1}[/tex]

Now, we plug in the given pressure and temperatures in Kelvins to obtain:

[tex]P_2= \frac{1307torr*(477+273)K}{(23+273)K}\\\\P_2=3312torr[/tex]

Best regards!

Answer:

B if you meant [tex]H_{2}O[/tex]->[tex]H_{2} +O_{2}[/tex]

Explanation:

A. Synthesis: reaction where two or more reactants combine to form one product. A+B->AB

B. Decomposition: reaction where a single compound reacts to form more than one product. AB-> A+B

C. Combustion: any reaction in which a substance reacts with oxygen gas. (needs [tex]O_{2}[/tex])

D. Single replacement: a type of reaction where one element replaces a similar element within a compound. Reaction is always an element and a compound.

E. Double replacement: a type of reaction where the ions of two compounds exchange places in an aqueous solution to form two new compounds. AB+CD->AD+CD

Answer:

3.8 L

Explanation:

From Boyle's law;

P1 V1 = P2 V2

P1 = initial pressure = 730 mm Hg

P2 = final pressure = 760 mm Hg

V1= Initial volume = 4.0 L

V2 = final volume = ?

V2 = P1 V1/P2

V2 = 730 × 4/760

V2 = 3.8 L

Answer:

The answer is B. Urine, Feces

Explanation:

Answer:

b.urine ,feces

.................

Answer:

Mass = 3 g

Explanation:

Given data:

Mass of magnesium = 2.4 g

Mass of oxygen = 2.4 g

Mass of magnesium oxide formed = ?

Solution:

Chemical equation;

2Mg + O₂    →     2MgO

Number of moles of oxygen:

Number of moles = mass / molar mass

Number of moles = 2.4 g/ 32 g/mol

Number of moles = 0.075 mol

Number of moles of magnesium:

Number of moles = mass / molar mass

Number of moles = 2.4 g/ 24 g/mol

Number of moles = 0.1 mol

now we will compare the moles of magnesium oxide with both reactant.

               Mg         :        MgO

                 2          :          2

               0.075    :        0.075

               O₂         :         MgO

                1          :           2

             0.1         :      2/1×0.1 = 0.2

Mass of magnesium oxide:

Mass = number of moles × molar mass

Mass = 0.075 mol × 40 g/mol

Mass = 3 g

Answer:

Halogen elements are dangerous in their uncombined forms because they are very reactive.

Explanation:

Hope this helps you! ^^

Halogens, including such chlorine or bromine, pose an environmental and occupational risk to the lungs and other organs.

The halogens are a group of five or six chemically related elements in the periodic table: fluorine, chlorine, bromine, iodine (I), and astatine.

Tennessee, an artificially created element, may also be a halogen. This group is known as group 17 in modern IUPAC nomenclature.

Halogens are unique in that they have seven valence electrons, making them extremely reactive. Valence electrons are the electrons involved in chemical reactions and are contained in the outer shell.

Fluorine is one of the most reactive elements known to man. Halides are simple halogen-containing compounds. Fluorine gas is lethal. Even breathing air containing 0.1% fluorine can result in death.

Thus, the halogen elements so dangerous in their uncombined forms.

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Answer:N-1

             H-3

             C-1

             H-4

Explanation:Nitrogen-1,Hydrogen-3(Ammonia),Carbon-1,Hydrogen-4(Methane).

Well, simply put,

There is no Hydrogen Chloride being produced from this reaction, but instead it's Ammonium Chloride.

Answer:

The desert was one covered by ocean water.

Explanation:

Answer:

The reactants and products in a chemical reaction contain the same atoms, but they are rearranged during the reaction. As a result, the atoms end up in different combinations in the products. This makes the products new substances that are chemically different from the reactants.

Explanation:

Answer:

copper has 2+ ions in a sample of copper

Answer:

A. chemical energy

Explanation:

Answer:

Explanation:

Dado que:

masa de oxígeno gaseoso = 100 g

presión = 1 atm

temperatura = 273 K

(a)

número de moles de oxígeno contenidos en el matraz = masa de oxígeno / masa molar de oxígeno

= 100 g / 16 gmol⁻¹

= 6.25 moles

(b) El número de moléculas de oxígeno es el siguiente:

Dado que 1 mol de oxígeno gaseoso contiene 6.023 * 10²³ moléculas de oxígeno.

Entonces, 6.25 moles contendrán:

= (6.25 ×  6.023 * 10²³) moléculas de oxígeno.

≅ 3.764 × 10²³ moléculas de oxígeno.

(c) El número de átomos de oxígeno es:

= 2 × 3.764 × 10²³

= 7.528 × 10²³ átomos de oxígeno

(d) Usando la ecuación de gas ideal

PV = nRT

El volumen ocupado por el oxígeno = [tex]\dfrac{nRT}{P}[/tex]

Volumen ocupado por oxígeno = [tex]\dfrac{ 6.25 * 8.314 *273}{1}[/tex]

Volumen ocupado por oxígeno= 14185.76 m³

Answer: B

Explanation: high tides and low tides are usually caused by the moon. The moons gravitational pull generates something called the tidal force. I’m not gonna go deep into this but yeah I think the answer is B

Answer:

:)

Explanation:

Answer:

32g

Explanation:

I just took the test and got it right

The mass of the copper is approximately 32.5 grams.

To find the mass of the copper, we can use the formula for heat:

Q = m * c * ΔT

where Q is the heat energy, m is the mass, c is the specific heat, and ΔT is the change in temperature.

In this case, we are given:

Q = 950 J (heat energy)

c = 0.39 J/(g·°C) (specific heat)

ΔT = 95.0°C - 20.0°C

= 75.0°C (change in temperature)

Substituting these values into the formula, we can solve for the mass (m):

950 J = m * 0.39 J/(g·°C) * 75.0°C

Dividing both sides of the equation by (0.39 J/(g·°C) * 75.0°C), we get:

m = 950 J / (0.39 J/(g·°C) * 75.0°C)

m ≈ 32.5 g

Therefore, the mass of the copper is approximately 32.5 grams.

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