If a drum skin vibrates with a frequency of 100 Hz, how many times does it move up and down each second?
( Chemistry )​

Answer:C and D

Explanation:Just did it

Increasing the pressure and Decreasing the temperature are the two changes would make this reaction product-favored.

It is a state when a reaction is reversible and both forward and reverse reaction occur simultaneously at the same rate .

In the process of manufacture of Ammonia , both forward and reverse reaction are taking place

N₂(g) + 3H₂ (g) →  2NH₃ (g)

2NH₃(g)  →  N₂ (g) + 3H₂ (g)

when these reaction occur at same rate , the state is called equilibrium and is represented by

N₂ (g) + 3H₂(g) ⇔ 2NH₃(g) +Heat

As we can see from the equation , heat is produced in the forward reaction so if we increase the temperature the reverse reaction will be favored ,

On decreasing temperature the reaction will become product favored .

While on increasing the Pressure the manufacture of Ammonia increases.

Therefore Option C and Option D are the two changes would make this reaction product-favored.

To know more about Equilibrium

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Answer:

2c11h21

Explanation:

Answer:

A -  Nitrile compound

B-   AlkylAmine

C-   Alcohol

D -  Alkene

Explanation:

(A) undergoes reduction to form alkylamine.

(B) is a primary alkyl amine which on carbylamine test gives a foul smell.

(B) reacts with NaNO2 + HCl undergoes diasotisation following which alcohol is produced.

(C) being a alcohol undergoes hydrolysis to give alkene.

(D) On further reaction with H2S04 by the rule of Markownikoff rule it forms a isomer of (C).

Answer:

Magnetic susceptibility is the degree to which a material can be magnetized in an external magnetic field. If the ratio between the induced magnetization and the inducing field is expressed per unit volume, volume susceptibility (k) is defined as.

Explanation:

good luck

Answer:

c

Explanation:

fossil records

Answer:

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Hence in the Sodium hydroxide, methyl orange will turn into yellow color and in Sulfuric acid shows red color. Red litmus will turn into blue color in the Sodium hydroxide solution.

Litmus paper is a paper which is used to identify the acidity or basicity of any solution.

Hence, the effect of red litmus & methyl orange is explained above.

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Answer:

20. Mg(NO3)2

21. KClO3

22. CaSO4

23. (NH4)2SO4

24. HC2H3O

25.  CO is carbon dioxide, which is neutral and would not combine with a hydrogen ion. Did you mean H and CO3(2-)? That would be H2CO3 (carbonic acid)

Explanation:

You have to match the charges of the Cations and Anions.

Answer:

[H⁺] = 2.57x10⁻⁶ M

Explanation:

This problem can be solved using the definition of pH:

pH = -log[H⁺]

Now we isolate [H⁺] in the equation:

-pH = log[H⁺]

[tex]10^{-pH}[/tex]=[H⁺]

As we are given the pH by the problem, we can now proceed to calculate the [H⁺]:

[H⁺] = [tex]10^{-5.59}[/tex]

[H⁺] = 2.57x10⁻⁶ M

Thus, when the pH of a solution is 5,59; the molar concentration of H⁺ species is 2.57x10⁻⁶.

Answer:

it is cylinder as it has two bases but no lateral faces.

Answer:

Energy is transferred between trophic levels when one organism eats another and gets the energy-rich molecules from its prey's body.

Explanation:

The flow of energy in an ecosystem is always linear ie uni direction. At each energy step in food chain, the energy received by the organisms is used for its own metabolism and maintenance. The left over energy is passed to next higher trophic level. Thus the energy flow decreases with successive trophic level.

Answer:

Yes

Explanation:

Cause the student add wire To the flash and changed colour

Answer: Yes

Explanation: Because the color changed and one of the ways to see if a chemical reaction occured is color change.

Answer:

1 - D) friction

2- B) rough

3- B) gravity

4- A)smooth

5- C)gravity pulls you down

Answer:

63.25 grams of CO₂

Explanation:

To convert from liters to grams, we first need to convert from liters to moles. To do this, we divide the liters by 22.4, the amount of liters of a gas per mole.

32.2 / 22.4

= 1.4375 moles of CO₂

Now we want to convert from moles to grams. To do this, we multiply the moles by the molar mass of CO₂. The total molar mass can be found on the periodic table by adding up the molar mass of carbon (12) and two oxygen (32).

12 + 32 = 44

Now we want to multiply the moles by the molar mass.

1.4375 • 44

= 63.25 grams of CO₂

This is your answer.

Hope this helps!

Answer:

see calculations below

Explanation:

Given:     HOAc     ⇄    [H⁺]     +    [OAc⁻]            

C(i)          0.12M             0M           0.15M

mix  => 5.55ml(0.092M NaOH) / (50ml + 5.55ml)

            = 0.00555(0.092)mole NaOH / 0.0555 L Soln

            = 0.0092M in NaOH is added into the initial buffer solution

            = 0.0092M in OH⁻ (NaOH is a strong base => 100% ionized)

Rxn => Addition of 0.0092M OH⁻ will react with 0.0092M H⁺ shifting buffer            .           equilibrium to the right decreasing [HOAc] and increasing [OAc⁻] by    .           0.0092M each.

Therfore ...

Given:           HOAc      ⇄    [H⁺]     +       [OAc⁻]            

C(i)                0.12M             0M               0.15M

ΔC           - 0.0092M           +x            +0.0092M

C(f)             0.1108M             x                0.1592M  =>  New Concentrations            .                                                                                     after adding 0.0092M             .                                                                                     NaOH

Substituting new acid and ion concentrations into Ka expression ...

Ka = [H⁺][OAc⁻]/[HOAc] = (x)(0.1592M)/(0.1108M) = 1.75 x 10⁻⁵M

=> x = [H⁺](new) = (1.75 x 10⁻⁵M*)(0.1108M)/(0.1592M) = 1.22 x 10⁻⁵M in H⁺ ions

*units of Ka are Molar

FYI => Adding a strong base to a buffer solution will shift pH to more basic.

          Adding a strong acid   to a buffer solution will shift pH to more acidic.

=> (such is a good way to check that your buffer calculations are correct.)

NOTE => Question asks for moles of HOAc, Na⁺OAc⁻ & NaOH after adding base. Giving answers in terms of Molarity (moles/Liter) is same as moles. Therefore ...

[HOAc] = 0.1108M

[NaOAc] = 0.1592M

[NaOH] = ∅M (from rxn of H⁺ + OH⁻ => H₂O, all NaOH was consumed in acid/base reaction.  Remaining are only Na⁺ as a spectator ion and OH⁻ as a function of the new concentration of H⁺ => [OH⁻] = Kw/[H⁺] = 1 x 10⁻¹⁴/1.22 x 10⁻⁵ = 8.2 x 10⁻¹⁰M.

Hope this helps. :-)

Answer:

A reduction potential measures the tendency of a molecule to be reduced by taking up new electrons. ... Standard reduction potentials can be useful in determining the directionality of a reaction. The reduction potential of a given species can be considered to be the negative of the oxidation potential.

Explanation:

Answer:

where:

• A is the wavelength in m.

• h = 6.626 x 10-34Js is Planck's

constant.

• m is the mass of the particle, such as the electron, in kg. The particle must have a mass for this relation to work.

• v is the forward velocity of the particle, in m/s.

Hence, the wavelength is:

6.626 x 10-34J.s

(9.1094 × 10 −³¹kg) (5 × 10³m/s)

We know that 1 J 1 kg. m²/s². So:

6.626 × 10-³4 g · m² / ø

9.1094 x 10 - 31) (5 x 105 m/s)

= 1.455 x 10-9 m

=

= 1.455 nm

Answer:

d. NaOH Sodium hydroxide soluble

Answer:

75.6

Explanation:

Answer:

k

Explanation:

Yes it is an cleaning product

Answer:

yes

Explanation:

it cleans in the house

Answer:

breathed in air contains oxygen while breathed out air contains higher percentage of CO2

Complete question is;

When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases,

A)the average kinetic energy of molecules increases.

B)the frequency of molecular collisions increases.

C)the rate constant increases.

D)the activation energy increases.

E)the order of reaction increases.

Answer:

B) The frequency of molecular collisions increases.

Explanation:

When we increase number of reactant molecules, the effective collision between the reactant molecules will form a product which also increases. As a result, the overall rate of the reaction will also increase which means the frequency of the molecular collision will also increase as well.

Thus, the correct answer is Option B

Answer:28 g

Explanation:

Answer:

force are called roll

Explanation:

force your answer give me five Points

Answer:

friction

Explanation:

The other terms honestly just don't make any sense in this context. Round objects experience less friction, since they have less of their surface touching the ground at a time. Imagine a bowling bowl: only a small part of the ball is ever touching the ground at one instant. Now imagine a waffle: almost all of the surface is touching the ground.

Answer:

the correct answer is D

Explanation:

Basically, melting ice is an endothermic reaction because the ice absorbs (heat) energy, which causes a change to occur.