an example of a physical change that does not involve any changes in CHEMICAL PROPERTIES. Explain which physical properties have changed and list a chemical property which has not changed.

Answer: silicon

Explanation:it just is

Respuesta

es la C. silicio

Explanation:

No existe una definición estandarizada de elemento metaloide ni un consenso completo sobre los elementos que son metaloides.

En la clasificación de metaloides se suelen incluir a:

Boro (B)

Silicio (Si)

Germanio (Ge)

Arsénico (As)

Antimonio (Sb)

Telurio (Te)

Answer:

The unit of molar mass is kg/mol. Where, m = mass, v = velocity.

Hope that helps :)

Answer:

10.5

Explanation:

well we added together so thats the result

Answer:

Explanation:

Answer:

A

Explanation:

Percent yield of water : 70%

Reaction

2H₂ (g) + O₂ (g) → 2H₂O (g)

mol H₂(MW= 2 g/mol) :

[tex]\tt \dfrac{13.8~g}{2~g/mol}=6.9~mol[/tex]

mol H₂O = mol H₂ = 6.9

mass H₂O(theoretical) :

[tex]\tt 6.9\times 18~g/mol=124.2~g[/tex]

[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{87}{124.2}\times 100\%=70\%[/tex]

Answer: Number 1 is titanium.

The one where you calculate a tin block is 13.0cm.

3. Is A) Same Density And Same Chemical Properties.

4. Is also A. Ne

Explanation:

Answer:

As this sheet of water moves on and off the beach, it can “capture” and transport beach sediment back out to sea. This process, known as “longshore drift,” can cause significant beach erosion.

Answer:

1 B

2A

#D

3B

1D

2B

3C

4A

A,C,A,B

C,A,C,A

C,A,A,B

Explanation:

Easy ive done this brings back memories

In  ecosystem, particles are carried as  bed load by rubbing particles together.Path of stream can be varied depending on amount of humus present in  soil and is measured in cubic meters per second and carrying capacity depends on  type of material through which stream flows.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

If the temperature increases, temperature reflects the speed of the molecules, so if the molecules are at a higher temperature, they are faster and they start to break bonds and new things react.

Explanation:

Answer:

D. Reactants.

Explanation:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Answer:

paleontologists is the answer to scientist who studies fossil

We can verify the properties as follows;

1) Sour taste - Put some soda on your tongue

2) Corrode metals - Put a little soda on a clean metal surface

3) Effect on Litmus paper - Dip a blue litmus paper in soda

4) Electrolysis - Add two electrodes to soda and connect a battery.

Soda, specifically carbonated beverages like cola or soda pop, typically exhibits acidic properties. The acidity of soda is primarily due to the presence of carbonic acid (H₂CO₃), which forms when carbon dioxide gas (CO₂) dissolves in water.

When carbon dioxide is dissolved in water under high pressure, it forms carbonic acid through the following reaction:

CO₂ + H₂O ⇌ H₂CO₃

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Answer:  It is element nitrogen. It has an atomic number of 7 and the valence electron is 5. It needs 3 electrons to complete its octet state. That's why sometimes it has the oxidation number of -3 in ammonia.

Explanation:

Equation -

CaCO₃ → CaO + CO₂

molecular masses of -

CaCO₃ = 40+12+16×3 = 100 g/mol

CaO = 40+16 = 56 g/mol

CO₂ = 12+16×2 = 44 g/mol

Now,

If 100 g of CaCO₃ is decomposed then it produces 56 g of CaO and 44g of CO₂

Then,

If 1 g of CaCO₃ is decomposed then it produces 56/100g of CaO and 44/100g of CO₂

Now,

Here in question, 10g of CaCO₃ is decomposed

It means, It produces

56/100 × 10 = 56/10 = 5.6 g of CaO and

44/100 × 10 = 44/10 = 4.4 g of CO₂

Now,

we get that 10 g of CaCO₃ on burning produces 4.4 g of CO₂

we need to calculate volume of 4.4 g of CO₂

Then,

mole = 4.4/44 = 0.1

Now,

volume = mole × 22.4 (in Litres)

= 0.1 × 22.4 = 2.24 L

Hence,

2.24 L of CO₂ will be produced when 10g of CaCO₃ decomposed.

Answer:

Both are at the side of the spectrum that has the lowest frequency.

Explanation:

i took the test

Answer:

a

Explanation:

Answer:

the internet can teach you alot about all 3 things

Explanation:

Answer:

if you go on YT and search  kinetic, potential, and gravitational energy their will be a bill nye vid that is very informational on the topic at hand!!!

Explanation:

hope this helps!!

Answer:

5.6 m/s

Explanation:

Answer:

:0

Explanation:

David <3

Answer:

A

Explanation:

The total number of each type of atom always stay the same.

Answer:

Thermal energy (B)

Explanation:

just did it

Electrical energy is transformed into thermal energy in the toaster, and chemical energy is transformed into thermal energy in the toast. Hence option b is correct.

Chemical energy is defined as chemical substances' potential energy, which is released as they experience chemical reactions and change into other substances. Additionally, it is what binds a substance's molecule's together. The body transforms or changes the chemical energy in food into heat and mechanical motion.

The wire attached to the power source transmits electrical energy to the toaster. The heating element is a part of the toaster. This heating element transforms electrical energy into heat energy, which aids in toast preparation, when it comes into contact with it. Thus, with an electric toaster, electrical energy is converted to heat energy.

Thus, electrical energy is transformed into thermal energy in the toaster, and chemical energy is transformed into thermal energy in the toast. Hence option b is correct.

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Answer:

The seasons are a result of the tilt of the earth

Answer:

The atomic nucleus is the small, dense region consisting of protons and net at the center of an atom.

Explanation:

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment. ... Protons and neutrons are bound together to form a nucleus by the nuclear force.

Answer:

The atomic nucleus is the small , dense region consisting of protons and neutrons at the center of an atom .

Answer:

ionization energy decreases from top to bottom in groups, and increases from left to right across a period. So technically, the noble games have the largest ionization energy.

Explanation:

Answer:

I think its (B)

Explanation:

as when the air thins out at higher elevations, your lift decreases so at some point, the plane cant produce enough lift to overcome gravity.

The density is the ratio of the mass to the volume. The density of the object is 44.1 g/cm³.

Density (ρ) is the quantitative measurement of the substance having grams of mass that are dissolved per cubic meter of the solution. The density is calculated as:

ρ = M ÷ V

Given,

Mass of the object = 441 gm

The volume of the object = 10 cubic meter

Density is calculated as:

ρ = 441 ÷ 10

= 44.1 g/cm³

Therefore, 44.1 g/cm³ is the density of the object.

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