A student heated a mixture of iron filings and sulfur strongly. He saw a red glow spread through the mixture as the reaction continued. At the end of the experiment a black solid had been formed.

a) Explain what the red glow indicates.

b) Give the chemical name of the black solid.

c) Write a word equation that and a balanced chemical equation to represent the reaction which has taken place.

d) The black solid is a compound. Explain the difference between the mixture of sulfur and iron and the compound formed by the chemical reaction between them.


Please answer part a, b, c, and d.
If you don't know the answer to all parts but you know the answer to one part then please answer it will still help ​

Answer: if it’s a multiple choice then it should be swing dances

Explanation:While the majority of swing dances began in African American communities as vernacular African American dances, some influenced swing-era dances, like Balboa, developed outside of these communities.

Answer:

The electron configuration of the neon atom. American chemist Gilbert Lewis (1875-1946) used this observation to explain the types of ions and molecules that are formed by other elements. He called his explanation the octet rule.

When the student adds 50 mL of distilled water to each beaker, CaCO3 will not dissolve in water while AgNO3 will dissolve completely in water.

We have to recall that according to the solubility rules, the carbonates of group two elements are insoluble in water. The solubility rules offer a convenient way of predicting the solubility of a compound in water.

When the student adds 50 mL of distilled water to each beaker, CaCO3 will not dissolve in water while AgNO3 will dissolve completely in water. This is because,  the carbonates of group two elements are insoluble in water.

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Answer:

Because i comes from cane.

Answer:

H2SO4 + 2KOH + K2SO4 + 2H2O

Explanation:

there are 2 potassium atoms on the left side so gotta balance that and 2 for the H in the KOH so we have to add a 2 for the hydrogen in H2O..I hope this is useful..

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If you rinse the burette with the solution to be used, then any tiny amounts of liquid remaining are the same as the solution used to fill the burette, so they will not change the concentration of the solution in any way. This is to prevent contamination.

~⭐Hope it helps you ⭐~

Answer:

The cause of the color "white" in wine is because the grape's skin is removed before fermentation.

The cause of the color "red" in wine is because the grape's skin is still intact while fermentation

Bad , fad is the answer check

Answer:

sesimographs

Explanation:

Answer:

A seismometer

Explanation:

it measures seismic waves

Considering the definition of ideal gas law, the volume of the Krypton gas is 3840 mL.

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P×V = n×R×T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

Now, taking into account this law, and isolating the pressure variable (P), you get:

[tex]V=\frac{nxRxT}{P}[/tex]

In this case, you know:

Replacing in the ideal gas law:

[tex]V=\frac{0.119 molesx0.082 \frac{atmL}{moleK}x298K}{0.756579 atm}[/tex]

Solving:

V=3.84 L= 3840 mL (being 1 L=1000 mL)

Finally, the volume of the Krypton gas is 3840 mL.

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According to the chemical formula of water the volume of hydrogen collected on electrolysis of water will be double of water thus volume of hydrogen is 40 cm.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

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Answer:

Cause and effect, easy.

Answer:

145°C is allowed

Explanation:

step step by step explanation

A. Ca(OH)₂ → CaO + H₂O is a decomposition reaction

B. 4K + O₂ → 2K₂O is a synthesis reaction.

The correct answer to the question is Option (D) A is a decomposition reaction, and B is a synthesis reaction.

With the above information in mind, we conclude that:

A. Ca(OH)₂ → CaO + H₂O is a decomposition reaction

B. 4K + O₂ → 2K₂O is a synthesis reaction.

The correct answer to the question is Option (D) A is a decomposition reaction, and B is a synthesis reaction.

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Answer:

d

Explanation:

Answer:  E

1

−

E

4

=

Δ

E

=

−

2.18

×

10

−

18

J

(

1

n

2

f

−

1

n

2

i

)

=

−

2.18

×

10

−

18

J

(

1

1

2

−

1

4

2

)

=

−

2.18

×

10

−

18

J

(

15

16

)

=

−

2.04

×

10

−

18

J

After you obtain the energy, then you can realize that that energy has to correspond exactly to the energy of the photon that came in:

|

Δ

E

|

=

E

photon

=

h

ν

=

h

c

λ

where  

h

is Planck's constant,  

c

is the speed of light, and  

λ

is the wavelength of the incoming photon. Thus, the wavelength is:

⇒

λ

=

h

c

E

photon

=

(

6.626

×

10

−

34

J

⋅

s

)

(

2.998

×

10

8

m/s

)

2.04

×

10

−

18

J

=

9.720

×

10

−

8

m

=

97.20 nm

Explanation:

Answer:

(Hope this helps can I pls have brainlist (crown)☺️)

Explanation:

Glucose is the most common form of sugar in the blood and the body's primary source of energy. Glucose is derived from the meals we eat or produced by the body from other chemicals. The circulation transports glucose to the cells. Several hormones, including insulin, regulate blood glucose levels.

a simple sugar that is a component of many carbohydrates and is a vital source of energy in living things.

Blood sugar, often known as glucose, is the most common sugar present in the body. It is your body's major source of energy and comes from the food you eat. Glucose is carried by your blood to all of your body's cells, where it is used for energy.

Answer:

The basic thing that all things are made up of

Explanation:

Answer:

A. evaporation

Explanation:

Answer:

This process is called (A) evaporation.

I hope this helped at all.

Answer:

TRUE

Answer:

YES.

Explanation:

The atomic number is the number of protons. Because the number of protons is EQUAL to the number of electrons, they're basically equal.

Answer:

Carbon monoxide (CO)

Explanation:

Organic compounds are generally any chemical compounds that contain "carbon-hydrogen bonds". Due to carbon's ability to catenate, millions of organic compounds are known. The study of the properties, reactions, and syntheses of organic compounds comprise the discipline known as organic chemistry.

Work required = 30J

This is because work = F * x

F (Newton's force) = 3N

x (car moved) = 10m

Work = 3 * 10 = 30J

Answer:

Test answers

1. Water carving out a limestone cave

2. Oxidation

3. Acid rain

(Got 100%)

Explanation:

The primary agents of chemical weathering are water, oxygen and acids. So acid rain is an agent of chemical weathering. Option C is correct.

Water, and many chemical compounds found in water, is the main agent of chemical weathering.  One of the most abundant rock-forming minerals, chemically reacts with water and water-soluble compounds to form clay.

Water contains many weak acids such as carbonic acid. The primary agents of chemical weathering are water, oxygen and acids.

These react with surface rocks to form new minerals that are stable in, or in equilibrium with, the physical and chemical conditions present at the earth's surface.

Hence, option C is correct.

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Answer:

11.11%

Explanation:

The percentage of an element in a compound is 100 times the fraction, so for water the mass percent hydrogen is 11.11%

Hope this helps :)

Answer:

A I think

Explanation: