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garri49 [273]
3 years ago
9

What is the answer to this question please

Chemistry
2 answers:
sergeinik [125]3 years ago
5 0
Infrared and ultraviolet light
mezya [45]3 years ago
3 0
Infared and ultraviolet light. :)
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A gas has a pressure of 550 kPa at 327°C. What will its pressure be at 27°C, if the volume does not change?
lozanna [386]

Answer:

300°

Explanation:

answer sjsjejjehehehehe

3 0
3 years ago
as the elements period 3 are considered in order of increasing atomic number, the number of principal energy levels in each succ
Diano4ka-milaya [45]

Answer:

stay the same.

Explanation:  Period 3 consists of the full 1s, 2s, and 2p electron orbitals, plus the 3s and 3p valence orbitals, which are filled with a total of 8 more electrons as we move from left (Na) to the far right (Ar):

Na:  1s2 2s2 2p6 3s1

Ar:    s2 2s2 2p6 3s2 3p6

As we move from left to right, and ignoring the already-filled 1s, 2s, and 2p orbitals, the period three starting and ending elements have the following:

Na: 3s1

Ar: 3s2, 3p6

All the new electrons electrons filled the third energy level (3s and 3p).  So the energy level does not change, just the orbitals.

5 0
3 years ago
Which functional group is within the compound shown below?
mamaluj [8]

Answer:

A. Amino

example phenylalanine

Explanation:

B. Ester is R-CO-OR

example nitroglycerin

C. Hydroxyl R-OH

example ethanol

D. Carbonyl R-(C=O)-R

examples formaldehyde

4 0
2 years ago
6. Why does the sun seem to change position in the sky?
Dafna11 [192]
A. Earth’s Rotation
4 0
3 years ago
Explain what a chemical reaction is and moles
Delvig [45]

Answer:

A process during which chemical bonds between atoms are broken and new ones are formed, producing one or more substances.

Moles are the amount of substance that contains as many particles.

Explanation:

A chemical reaction is when a chemical change occurs for example when a nail comes into contact with air and is then exposed to air it begins to rust. It forms a red-brown substance which changes the chemical composition of the original compound.

Examples of chemical reactions:

Combustion

Oxidation (rusting)

Cooking an egg

Photosynthesis

Digestion

Fireworks

Paper Burnin

The mole is the amount of substance that contains as many particles (molecules, ions or atoms) as there are in 12g of carbon.

1 mol is the amount of substance that contains the same number of particles as there are atoms in 12.0 g of carbon-12 and that number is referred to as Avogardo's constant (6.022 x 10^{23}).

3 0
2 years ago
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