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IRINA_888 [86]
3 years ago
15

Which of the following best describes a physical change?*

Chemistry
2 answers:
Dennis_Churaev [7]3 years ago
5 0

Answer:

D

Explanation:

i had this question and i got it right

KATRIN_1 [288]3 years ago
4 0

Answer:

d

Explanation:

I took this test way back

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Similarities between pluton and pegmatite
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Plutons are large chambers of magma under grown

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3 years ago
If energy was added to solid, what state would it change to
12345 [234]

Answer:

Explanation:

The answer is C Liquid

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PLEASE HELP ME!!! NEED THE ANSWER FAST! WILL CHOOSE THE BRAINLIEST!!!
Vlad [161]
Remember that a cation will be smaller than its neutral atom, and an anion will be larger than its neutral atom. This would automatically eliminate answer choices A and D.

Also keep in mind that atomic radii decreases from left to right as you move along a periodic table. It also decreases from bottom up. 
Atomic radii increases as you move from right to left and as you go from up to down.

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8 0
3 years ago
The ozone "hole" over Antarctica formed as the result of a series of chemical reactions. The loss occurs in part through three c
mixer [17]

Answer:

A)

Cl + O3 --> ClO + O2

2ClO --> ClOOCl

ClOOCl --> 2 Cl + O2

B)

Cl2 + 4O3 -> 2 ClO + 5O2

Explanation:

Step 1: Chlorine atoms react with ozone (O3) to form chlorine monoxide and molecular oxygen

Cl + O3 --> ClO + O2

Step 2: Chlorine monoxide molecules combine to form ClOOCl gas

2ClO --> ClOOCl

Step 3: ClOOCl absorbs sunlight and breaks into chlorine atoms and molecular oxygen

ClOOCl --> 2 Cl + O2

B) Overall Balanced equation

Cl2 + 4O3 -> 2 ClO + 5O2

7 0
2 years ago
Give the number of covalent bonds that a carbon atom can form.
polet [3.4K]

Answer:

four covalent bonds

Explanation:

A carbon atom would form 4 covalent bonds.

For a covalent bond to be formed, an atom would share its valence electrons with another. In this process, each atom would require unpaired electrons for this bond to be formed. The number of available unpaired electrons would represent the number of electrons needed to complete the outer energy level of the atom.

In a carbon atom, we have no lone pair of electrons and 4 unpaired electrons. When these 4 electrons are shared with those of other atoms, they produce a complete octet which perfectly mimics the noble gases.

3 0
3 years ago
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