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Scorpion4ik [409]
3 years ago
10

HELP!!! The periodic change between night and day is caused by ____________.

Chemistry
1 answer:
charle [14.2K]3 years ago
4 0

Answer:

C. Earth's revolution around the sun

Explanation:

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Can someone help out pls
Troyanec [42]

Answer:

1. Acids

2. Its molecular arrangement

3. Very acidic

4. Unsaturated

5. Apple juice

Explanation:

1. Acids have pH less than 7

2. Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.3. Very acidic

4. Unsaturated solutions are solutions in which the amount of dissolved solute is less than the saturation point of the solvent (at that specific temperature gradient).

5. The lower the pH, the more hydrogen molecules.

4 0
3 years ago
Read 2 more answers
Draw the Lewis structure for the polyatomic formate anion. Be sure to include all resonance structures that satisfy the octet ru
givi [52]

Answer:

Lewis structure of polyatomic formate anion.

Explanation:

To draw Lewis structure for any chemical species,

1)Count the total number of valence electrons present in it.

This can be obtained by adding valence electrons of each constituent atom.

2)Arrange those valence electrons in such a way that each atom should attain eight electrons around it to satisfy octet theory.

The structure of formate ion and its Lewis structure are shown below:

HCOO- is the formate ion.

It has total:

1+4+6+6+1 = 18 valence electrons.

Since, hydrogen has one, carbon has four and oxygen has six valence electrons and the charge of the anion is one.

Arrange this 18 electrons in such a way that each atom should get 8 electrons around it.

Resonance structures of formate ion:

8 0
3 years ago
What part of the atom contains the most space: the nucleus or the energy levels? Why?
Anarel [89]

Answer:

I don't know 100% but im pretty sure its electrons, if im wrong im really sorry let me know in the comments ill change it

explanation

the nucleus has more weight but its more compact but the electrons are spread apart circling the nucleus and therefor take up more space

3 0
3 years ago
For a second order reaction, the half-life is equal to:_____.
gtnhenbr [62]

Answer:

Half life = 1 / k[Ao]

Explanation:

From:

1/ [A] = kt + 1/ [Ao]

Isolating t on its own, we have:

kt = 1 / [A] - 1 / [Ao]

t = 1 / [Ao] / k

Re-arranging we have:

t = 1 / k [Ao]

The t represents the t=half life of the second order reaction and the formula can be re-written as:

t1/2 = 1 / k [Ao]

This is so because second order reaction decreases at a much faster rate than zero and first order reactions and there slopes decreases to zero at a much faster rate.

4 0
3 years ago
What type of chemical reaction occurs when more energy is released during a chemical reaction than is needed to start a chemical
Mamont248 [21]

Answer:

exothermic reaction

Explanation:

your welcome :)

4 0
3 years ago
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