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Veseljchak [2.6K]
3 years ago
15

Which properties of a substance could change during a PHYSICAL change?

Chemistry
1 answer:
olga2289 [7]3 years ago
4 0
It’s appearance
It’s physical form
What it feels like
How hot it gets
If it melts
Shape
Color
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The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)

The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. The hydrogen bonding between complementary bases holds the two strands of DNA together.

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A block has a mass of 325g and a volume of 500mL. What is its density? If water has a density (D=m/v) of 1g/mL, will the block f
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A. 0.65g/mL, float

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4 years ago
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