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3 years ago

Which statement is true about the electromagnetic spectrum?

1 answer:

6 0

<span>The statement that tells a fact about the electromagnetic spectrum is the third option. Electromagnetic spectrum contains a spectrum of visible light and a wide array of non-visible forms of radiation. Electromagnetic spectrum is a common term for all frequencies and extended wavelengths of electromagnetic radiation or photons.</span><span />

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How to draw lewis dot structure of BH2-

frosja888 [35]

I am attaching a picture cause I cannot write it directly

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6 0

3 years ago

must undergo addition because they have easily broken π bonds. ____________ rule states in the addition of HX to an unsymmetrica

erastova [34]

Answer:

Alkenes, Markovnikov's, Alkenes, Alkyl halides, and less.

Explanation:

Alkenes must undergo addition because they have easily broken π bonds.

Markovnikov's rule states in the addition of HX to an unsymmetrical alkene, the H atom bonds to the less substituted carbon atom.

Alkenes are unsaturated hydrocarbons because they have fewer than the maximum number of hydrogen atoms per carbon.

Alkyl halides have good leaving groups and therefore readily undergo substitution and elimination reactions.

In hydroboration, the boron atom bonds to the less substituted carbon.

3 0

3 years ago

A glass sphere is filled to full volume with a gas. The pressure of the gas inside the sphere is 30.0 atm, and the temperature i

harkovskaia [24]

Answer:

28atm

Explanation:

Using Gay lussac's law equation as follows:

P1/T1 = P2/T2

Where;

P1 = initial pressure (atm)

T1 = initial temperature (K)

P2 = final pressure (atm)

T2 = final temperature (K)

Based on the information provided in this question;

P1 = 30.0 atm, T1 = 30.0°C, P2 = ?, T2 = 10.0°C

NOTE: Absolute temperature i.e. Kelvin is required for this law

T1 = 30°C + 273K = 303K

T2 = 10°C + 273K = 283K

Using P1/T1 = P2/T2

30/303 = P2/283

Cross multiply

P2 × 303 = 30 × 283

303P2 = 8490

P2 = 8490/303

P2 = 28.02

New pressure of the gas = 28atm

4 0

3 years ago

A chemical reaction in which one element replaces another element in a compound can be catergorized as a

Gwar [14]

Answer:

$\huge\boxed{\sf Single \ displacement \ reaction}$

Explanation:

<h2><u>Displacement reaction:</u></h2>

A reaction in which an element displaces or replaces another element of a compound is called a displacement reaction.

<h3><u>Types:</u></h3>

There are 2 types:

<h3><u>1. Single displacement reaction:</u></h3>

If one element displaces 1 other element of a compound, it is called single displacement reaction.
<u>Example</u>: $CuSO_4 +Fe \longrightarrow \ FeSO_4 + Cu$
Here, 1 element (Fe) displaces 1 other element (Cu) of a compound.

<h3><u>2. Double displacement reaction:</u></h3>

If two elements in two compounds displace one another, it is called double displacement reaction.
<u>Example:</u> $CuSO_4+NaOH \longrightarrow Cu(OH)_2 + Na_2SO_4$
Here, Copper and sodium both displace each other.