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Answer:

Sometimes, it is necessary to produce a small amount of iron more quickly, for example if railway workers need to produce molten metal to fix a broken rail.

Explanation:

The thermite reaction uses aluminium powder and iron (III) oxide. When ignited, the mixture reacts vigorously because of the large difference in reactivity between aluminium and iron.

The aluminum can create more durable bonds with oxygen than it can with hydrogen. Since a lot of heat is produced throughout the entire reaction, molten iron that may be used to link railroad tracks is produced as a result of the reaction.

Chemical element aluminum has the atomic number 13 and the symbol Al. Aluminum has a density that is around one third that of steel, which is lower than that of most common metals. It has a strong affinity for oxygen, and when exposed to air, creates a protective oxide coating on the surface.

Aluminum (Al) and iron(III) oxide (Fe2O3) react to generate aluminum oxide (Al2O3) and molten iron (Fe). Aluminum displaces iron in iron(III)oxide to generate aluminum oxide in what is known as a displacement reaction.

Iron oxide and aluminum are used to repair machine parts that have cracks or serve as railing on railroad tracks. Thermite reaction is the name given to this process.

Thus, The aluminum can create more durable bonds with oxygen than it can with hydrogen.

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Answer:

False

Explanation:

Amplitude does not affect wavelength

The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%

An equation is an expression used to show the relationship between two or more variables and numbers.

Given the sample had a mass of 53.5g, hence:

Mass percent of sugar in the sample = (35.2/53.5) * 100% = 66%

Total percent recovery = [(35.2 + 16)/ 53.5] * 100% = 95.7%

The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%

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Answer: The main difference between the two is their fat content. Heavy cream has slightly more fat than whipping cream. Otherwise, they are nutritionally very similar. You can use them interchangeably in recipes without affecting the taste, although they may lead to different consistencies.

Explanation:

Answer:

40. B

41. B

Explanation:

Copper is a good insulator and conducts electricity.

STP signifies standard temperature and pressure. These conditions are at 1 atmospheric pressure and 0 degrees Celsus, It has been said that at these conditions, one mole of a gas molecule is  22.4 liters of volume.

1.50 mol Cl2( 22.4 L / mol) = 33.6 L Cl2

Answer:

Q = mcΔt but this time rearrange to find for c

Explanation:

Q or energy = 78.2J

mass of lead  =  45.6g

Specific heat capacity of lead = ????

Δt = 13°C

Q = mcΔt

Rearrange the equation to find for c

c = Q / m x Δt

c = (78.2) / (45.6) x (13)

c ≈ 0.132 J °C

It's actually true hope it helps.

Answer:

wish it helps anything else comment at my answer

Answer:

Al

Explanation:

Al = Aluminum

Your answer is B

Sun and wind are considered renewable energy, meaning that it won't polute the Earth. And as far as I know, the Sun and wind can't really run out. So it can last a very long time!

Hope this helps!

-Daisuke

Fe +O2 =Fe2O3 is correct !

Answer:

As ethanoic acid is basically a acid

it will turn blue litmus red and on a red litmus paper

there will be no effect

Answer:

Metal expands when heated. Length, surface area and volume will increase with temperature. ... Thermal expansion occurs because heat increases the vibrations of the atoms in the metal

Explanation:

hope this help :)

Answer:

Length, surface area and volume will increase with temperature.

Explanation:

Metal expands when heated. Length, surface area and volume will increase with temperature. ... Thermal expansion occurs because heat increases the vibrations of the atoms in the metal

Answer: Copper (I) Carbide

Explanation:

Copper is a polyatomic ion, meaning it has multiple charges. Carbon has an outer shell consisting of 4 valence electrons so it can either add or lose 4 electrons so it’s charge can be -4 or +4. As said Copper has multiple charges but they are positive, so in this case Cu4 would be 4 +1 charges compared to C which would be -4. Therefore this is a 4:1 ratio, meaning Cu4C is Copper (I) Carbide

hope this helps :)

Answer:

who's asking?

Explanation:

Answer:

I believe your answer is B. Each orbit has a specific energy level.

Hope this helped!

all of them are right

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Answer:

hydrogen bonding

Explanation:

The two strands of DNA are held together by hydrogen bonds between complimentary nucleotides.

The percentage of the total energy contributed by fat = 51.59% of fat

The quantity of fat in the hamburger = 36grams

But 1 gram of fat = 9 kcal( standard energy value per gram of fat).

That is , 9kcal = 1 gram

X kcal = 36 grams

cross multiply,

X kcal = 9 × 36

= 324kcal

To calculate the percentage of 324kcal of fat in 628 kcal,

[tex]\% = \frac{324}{628} \times \frac{100}{1} [/tex]

[tex]\% = \frac{32400}{628} [/tex]

% = 51.59% of fat

The percentage of the total energy contributed by fat = 51.59%

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A mixture of iodine and sulphur can be separated by adding Carbon disulphide that is (CS₂) then stir the solution and filter it . As sulphur dissolved in CS₂, so it come into filter and got separated from the mixture.

Answer:

Molecules at a higher temperature have higher/more kinetic energy, speed, and momentum compared to molecules at a lower temperature.

Explanation:

Answer:

Carnivores and omnivores are secondary consumers. Many carnivores eat herbivores. Some eat omnivores, and some eat other carnivores. Carnivores that consume other carnivores are called tertiary consumers.

E.g

Felines, ranging from domestic cats to lions, tigers, and other large predators.

Some canines, such as the Gray Wolf

Hyenas.

ferrets.

Polar Bears.

Pinnipeds ( seals, sea lions, walruses, etc.)

Birds of prey, including hawks, eagles, falcons, and owls.

Answer:

c. are energy relationships between the protons of the reacting atoms.

Explanation:

Answer:

ok

Explanation:

why I needed to give a answer to a question. I want to ask the question. brainly solve this issue. i cant ask questions without answering to 1 questions.