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Water waves in a small tank are 6.0 cm long. They pass at a given point at a rate of 4.8 waves per second. What is the speed of the wave?

Answer:

\(\boxed {\boxed {\sf 2 K + Cl_2 \rightarrow 2KCl}}\)

Explanation:

The law of conservation of mass states that mass cannot be created or destroyed. The mass of the reactants must equal the mass of the products. Basically, the number of atoms at the beginning is the same as the end.

Count up the atoms on the left and right sides of the arrow. Remember to account for coefficients and subscripts.

1. 2Fe+3O₂⇒Fe₂O₃

Right: 2Fe + 3O₂

Left: Fe₂O₃

2. 2H₂+ O₂ ⇒ 2H₂O₂

Right: 2H₂+O₂

Left: 2H₂O₂

3. 2K+Cl₂⇒ 2KCl

Right: 2K + Cl₂

Left: 2KCl

4. C+O₂ ⇒ 2CO

Right: C+O₂

Left: 2CO

The only balanced equation that follows the conservation of mass is choice 3: 2K+Cl₂ ⇒2KCl

I think the answer is C. (Increasing the number of variables in the experiment)

Answer:

ITS B

Explanation:

THE OTHER GUY WAS WRONG

As per the balanced reaction of Al and oxygen gas, 4 moles of Al needs 3 moles of oxygen gas. Hence, 7 moles of Al needs 5.2 moles of O₂.

Aluminum metal is more reactive towards oxygen and it forms oxides on its surface. The balanced chemical equation of the reaction between Al and oxygen is written as follows:

\(\rm 4 Al + 3O_{2}\rightarrow2 Al_{2}O_{3}\)

As per this reaction, 4 moles of aluminum needs 3 moles of oxygen molecule. Then, the number of moles oxygen molecule required to react with  7 moles of Al is :

no.of moles of O₂  = (7×3)/4 = 5.2

Therefore, 5.2 moles of oxygen gas is required to completely react with 7 moles of aluminum metal.

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Answer:

Nacio, is contained in 400 grams of water whose molality ... Molality= moles of solute / mass of solvent in Kg Now molality=0.60 Mass

Explanation:

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Answer:  Technically, this cannot be answered, since none of the H atoms have a mass number assigned.  With the assumption noted delow, I calculate 1.012 as the average atomic mass.

Explanation:

My answer is based on assumed masses for the three H isotopes:

1H :   1 AMU

2H:   2 AMU   Deuterium

3H:    3AMU   Tritium

     AMU   Rel Abund.    Wt. Avg

1H 1     99.00%      0.99

2H 2       0.80%      0.016

3H 3       0.20%       0.006

              Sum   1.012

Answer:

Explanation:

Here, we want to know the number of moles of water molecules present in the hydrate

Firstly, we need to get the percentage by mass of water

To get this, we have to divide the percentage lost to heating by the total mass and convert to a percentage

Mathematically, we have that as:

What this means is that the percentage by the molar mass of water is still 16.276%

To get the number of moles of water, let us call it n

The molar mass of water divided by the total mass of the hydrate as a percentage is equal to 16.276%

Thus, we have it that;

The molar mass of n moles of water is (18 * n = 18n g/mol : 1 mole of water has a mass of 18g)

For the anhydrous part, the molar mass is 278 g/mol

Thus, we have the percentage as:

From the above, we can get the value of n

Thus, we have that as:

The number of hydrate molecule is 3

Answer:

different from ionic or covalent bonding

Explanation:

After Rounding off The percentage yield is 64%

It is the ratio of actual yield to theoretical yield multiplied by 100% .

It is given in the question

20.0 g of bromic acid, HBrO3, is reacted with excess HBr.

The reaction is

HBrO₃ (aq) + 5 HBr (aq) → 3 H₂O (l) + 3 Br₂ (aq)

Actual yield = 47.3 grams

Molecular weight of Bromic Acid is 128.91 gram

Moles of Bromic Acid = 20/128.91 = 0.155 mole

Mole fraction ratio of Bromic Acid to Bromine is 1 :3

Therefore for 0.155 mole of Bromic Acid 3 * 0.155 = 0.465 mole of Bromine is produced.

1 mole of Bromine = 159.8 grams of Bromine

0.465 of Bromine = 74.31 grams of Bromine

Percentage Yield = (47.3/74.31)*100 = 63.65 %

After Rounding off The percentage yield is 64% .

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Answer:

0.7 L

Explanation:

Step 1: Given data

Step 2: Calculate the final volume of the container

If we assume ideal behavior and constant temperature, we can calculate the final volume of the container using Boyle's law.

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁/P₂

V₂ = 0.5 atm × 2.4 L/1.7 atm = 0.7 L

Answer:

the answer is B

hope this helped!

The cube volume is 9.3307 cm\(^-3\) and cube density is 0.9210 g/cm³.

Volume of a cube =(length)³=(0.996)³=0.9880 cm³

Density of a cube= mass /volume =0.91/0.9880=0.9210 g/cm³

Density and volume are the two terms which can be used interchangeably . Any substance with mass and which occupies space  has a definite volume and density.Density and volume are  inversely proportional to each other.

That means if the density increases volume decreases and if volume increases the density decreases.SI unit of volume is m³ and that of density is kg/m³.

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The volume (in liters) of NO₂ added to the storage tank at STP is 4592 L

At standard temperature and pressure (STP),

1 mole of a gas = 22.4 L

With above, we can determine the volume of the NO₂ added. Details below:

From the question given above, the following data were obtained:

The volume of NO₂ added can be obtained as follow:

1 mole of NO₂ is equivalent to 22.4 L at STP.

Therefore,

205 moles will be equivalent to = 205 × 22.4 = 4592 L at STP

Thus, the volume of NO₂ added to the tank is 4592 L

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An increased temperature generally causes a reaction to occur faster rather than slower. Therefore option C is correct.

The increased temperature leads to a higher average kinetic energy of the molecules, which results in more frequent and energetic collisions between the reactant particles.

This increased collision frequency and energy facilitate the breaking of chemical bonds and the formation of new bonds, leading to an accelerated reaction rate.

When the temperature is raised, the kinetic energy of the molecules increases. This means that the individual molecules move faster and possess a greater amount of energy. As a result, the molecules collide more frequently and with higher energy, enhancing the likelihood of successful collisions that lead to a reaction.

In summary, an increased temperature leads to a faster reaction rate by increasing the average kinetic energy of the particles, causing more frequent and energetic collisions.

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Answer:

Option B is correct: C6H1206(s) and HCl(g)

Answer:

A. was the object once part of and asteroid

Explanation:

A is correct because at first asteroid's pieces fall off and burn up to enter the atmosphere and meteoroid's are small while asteroid's are big and rocky

D. Is the object made of rock? The question "Is the object made of rock?" would best confirm that the object is a meteoroid.

Meteoroids are small rocky or metallic objects that are in space and can potentially enter the Earth's atmosphere. By determining if the object is made of rock, it aligns with the characteristics of a meteoroid.

Option A, "Was the object once part of an asteroid?" does not necessarily confirm that the object is a meteoroid since meteoroids can come from various sources, not just asteroids.

Option B, "Where is the object located?" does not provide specific information about the nature of the object and can apply to comets and asteroids as well.

Option C, "Does the object orbit the sun?" is a characteristic shared by comets, asteroids, and meteoroids. It does not specifically confirm that the object is a meteoroid.

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The covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

What is covalent bond ?

Atoms share electron pair between them in covalent bonds. H-H or C-H are examples of nonpolar covalent bonds between atoms with similar or identical electronegativity, whereas polar covalent bonds are formed when unequal electronegativity is shared between atoms (e.g., H–O).

What is reactant ?

Raw materials known as reactants combine to create products. When the right factors, such as temperature, time, or pressure, come into play, the chemical bonds between the reactants are broken, allowing the atoms to form new bonds that lead to various combinations.

Therefore, covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

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Answer: two solutions mixed in a beaker produce a solid

Explanation: it formed a new substance

Answer:

I  forgot that but I think boron is first d ff\

Explanation:

If you are talking about an atom with a full octet, then it would just have a full shell of 8 valence electrons.

Answer:

valence

Explanation:

The given answer statement  "there is no aluminum left" and " limiting reactants is aluminum" are correct.

In the analysis of Trial 2, it was found that there was no aluminum left after the reaction had taken place. This indicates that all of the aluminum had reacted with the copper (II) chloride and that it was the limiting reactant in the reaction.

To confirm this, the mass of each reactant was converted to moles using their respective molar masses. It was found that the aluminum had a smaller number of moles than the copper (II) chloride, indicating that it would be used up first and thus be the limiting reactant.

Therefore, the limiting reactant in Trial 2 was aluminum.

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Answer:

the formula for zinc sulfide is b. ZnS

Answer:

molecule. The smallest part of a compound is the molecule. A molecule retains all the properties of that compound.

Explanation:

thanks me later

Answer:

they are said to be excited.

Explanation:

excitation is a fundamental concept in atomic physics that helps explain many of the properties and behaviors of matter on both the macroscopic and microscopic scales.

Answer:

I think it's B

Explanation:

The correct formula for the compound that forms between aluminum (Al) and sulfur (S) is (d) Al₂S₃.

The correct option is E, none of the above.

The reaction between aluminum (Al) and sulfur (S) is an example of a chemical reaction known as a combination or synthesis reaction. In this reaction, aluminum and sulfur combine to form a

.

The chemical equation for the reaction is:

2Al + 3S → Al₂S₃

Aluminum has a 3+ charge (Al³⁺) and sulfur has a 2- charge (S²⁻). In order to balance the charges, two aluminum ions (Al³⁺) are needed to combine with three sulfur ions (S²⁻), resulting in the formula Al₂S.

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This problem shows chemical equation for equilibrium production of ammonia and asks for the correct change when the concentration of nitrogen is increased. Thus, the answer is the forward reaction would increase to start reducing the concentration of N2.

In chemistry, chemical reactions not always reach a 100-% conversion when reactants get in contact in order to carry out the chemical reaction. Thus, there is a point wherein the concentrations remain the same and is called equilibrium.

In such a way, for this problem, we have the following chemical reaction at equilibrium:

\(N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)\)

Now, according to the Le Ch.atelier's principle, an increase in the concentration of any species, shifts the equilibrium away from it, which means that if we increase the concentration of nitrogen, a reactant, the forward reaction will be favored.

Thereby, the correct answer is "the forward reaction would increase to start reducing the concentration of N2".

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Dalton's atomic model was one of the firsts that tried to define what is an atom and what is its composition, one of the statements was "atoms are indivisible". Nowadays, with modern technology we can see that atoms have subparticles, and can be splitted into protons, neutrons, electrons, and even these subparticles will have smalled fundamental particles inside of it. Therefore this is statement is false

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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Answer:

b

Explanation:

cause it stops at 8 and it starts going up until it hits 14