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stira [4]
3 years ago
7

How can a change in color indicate a physical change?

Chemistry
2 answers:
liubo4ka [24]3 years ago
6 0
A temperature change maybe?
Inessa05 [86]3 years ago
6 0
Because you can see with your eyes that it changed
You might be interested in
A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is
erastova [34]

Answer: The total width of a crystal is 1.65 mm.

Explanation:

Horizontal length between the two molecules = 16.5 nm

Width of the 10^5 molecules :16.5 nm\times 10^5=16.5\times 10^5 nm

1 nm=10^{-6} mm

The total width of a crystal in millimeter=16.5\times 10^5\times 10^{-6} mm=1.65 mm

The total width of a crystal is 1.65 mm.

7 0
4 years ago
Read 2 more answers
What best explains why sodium is more likely to react with another element than an element such as neon?
hichkok12 [17]

Answer:

1 fewer electron

Explanation:

5 0
3 years ago
Read 2 more answers
Any element can always be identified by its:
Alborosie

Explanation:

atomic mass

Really...i think it can also be atomic number..

3 0
4 years ago
What is the number of molecules of c2h5oh in a 3m solution that contains 4.00kg h2o?
Veronika [31]
 The number  of C2H5OH  in a 3 m solution that contain 4.00kg H2O is calculate as below

M = moles of the solute/Kg  of water

that is 3M = moles of solute/ 4 Kg
multiply  both side by  4

moles of the  solute  is therefore = 12  moles

by use of Avogadro law constant

1 mole =6.02 x10^23  molecules

what  about 12 moles

=12 moles/1 moles  x 6.02 x10^23 = 7.224 x10^24 molecules
3 0
4 years ago
What has 6 valence electrons and 16 protons and ends withthe letter "r"
zmey [24]

Answer:

Sulphur

Explanation:

Sulphur(S) is the Sixteenth element of the periodic table and it has an electronic configuration of 2,8,6. This means it has six electrons in its outermost shell( valence electrons).

Sulphur has sixteen(16) protons which is equal to the atomic number which is also sixteen. Sulphur ends with the letter ‘r’. All the descriptions of the element are satisfied and it validates Sulphur.

4 0
3 years ago
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