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3 years ago

Data which statement best describes sound

Chemistry

1 answer:

enyata [817]3 years ago

7 0

Answer:

Sound is a form of energy that transmits in form of longitudinal waves, and are interpreted as pulses by the brain into useful action.

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Methylation is a process that involves which of the following metals

Vesnalui [34]

Methylation is a process that involves Mercury metal. Methylation is a process by which a methyl groups are added to the DNA molecule. when it occurs it can change the activity of a DNA segment without changing the sequence, additionally, when located in a gene promoter it may act to repress gene transcription.

7 0

4 years ago

What is the molarity of a solution if you take 12.0 grams of ca(no3)2 and mix it with 0.105 l of water?

Lunna [17]

The molarity of a solution if it tale 12.0 grams of Ca(No3)2 is calculated as below

molarity = moles/volume in liters
moles = mass/molar mass = 12.0 g/ 164 g/mol = 0.073 moles

molarity is therefore = 0.073/0.105 = 0.7 M

8 0

3 years ago

At a certain temperature, the K p Kp for the decomposition of H 2 S H2S is 0.746 0.746 . H 2 S ( g ) − ⇀ ↽ − H 2 ( g ) + S ( g )

Ivanshal [37]

Answer: The total pressure of container at equilibrium is 0.431 bar

Explanation:

We are given:

Pressure of hydrogen sulfide = 0.240 bar

The given chemical equation follows:

$H_2S(g)\rightleftharpoons H_2(g)+S(g)$

Initial: 0.240

At eqllm: 0.240-x x x

The expression of $K_p$ for above equation follows:

$K_p=\frac{p_{H_2}\times p_S}{p_{H_2S}}$

We are given:

$K_p=0.746$

Putting values in above expression, we get:

$0.746=\frac{x\times x}{0.240-x}\\\\x=0.191,-0.940$

Neglecting the negative value of 'x' because pressure cannot be negative.

So, the equilibrium pressure of hydrogen gas = x = 0.191 bar

The equilibrium pressure of sulfur gas = x = 0.191 bar

The equilibrium pressure of hydrogen sulfide gas = (0.240 - x) = (0.240 - 0.191) = 0.049 bar

Total pressure of the container at equilibrium = $p_{H_2}+p_{S}+p_{H_2S}$

Total pressure of the container at equilibrium = 0.191 + 0.191 + 0.049 = 0.431 bar

Hence, the total pressure of container at equilibrium is 0.431 bar

6 0

4 years ago

Abiotic factors in an environment include A) producers. B) decomposers. C) predators and prey. D) sunlight and water. Abiotic fa

Oliga [24]

Answer:

Sunlight and water (D)

Explanation:

Sunlight and water are two of the many abiotic factors that may be present in a particular environment. All other factors mentioned in the choices are biotic factors. Producers are plants; decomposers are fungi and bacteria

5 0

3 years ago

a positively charged object is placed to the right of a cathode ray. which direction will the ray bend

Sidana [21]

Cathode rays are negatively charged.

Chatode rays are electron beams.

Then, based on the knwon principle that two objects with different sign of charge attract each other, when a positively charged object is placed to the right of a cathode ray (whose charge is negative ), the ray will be attracted by the positevely charged object.

So, the ray will bend to the right.

5 0

4 years ago