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NARA [144]
3 years ago
10

A substance is melting, so it is transitioning from solid to liquid. What kind of change is this?

Chemistry
2 answers:
Nostrana [21]3 years ago
8 0

Answer:

chemical or physical i dont know for sure i kniw i have learned this juat cant rember

rewona [7]3 years ago
5 0

Answer:

Your answer will be: <u><em>Physical</em></u>

Explanation:

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Select all of the answers that apply. Which of the following are ways the atmosphere supports life?
kupik [55]

Answer:

the atmosphere supports life by giving us simple things like wood.

5 0
3 years ago
Help please if its right i'll give brainiest
Mkey [24]
I believe it is spontaneous generation
5 0
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Which statement best describes the characteristics of the Sun?
pychu [463]
Medium in size is your answer
8 0
2 years ago
Find the "density" of a copper sample whose mass is 134.4 grams and whose volume is 15.0mL
Sonja [21]

Answer:

8.96 g/mL

Explanation:

density = mass / volume

density = 134.3g / 15.0 mL

density = 8.96 g/mL

3 0
2 years ago
The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti
Vesna [10]

Zeff = Z - S

Here, Z is the number of protons in the nucleus, that is, atomic number, and S is the number of nonvalence electrons.

For boron, the electronic configuration is 1s₂ 2s₂ 2p₄

Z = 5, S = 2

Zeff = 5-2 = +3

For O, electronic configuration is 1s₂ 2s₂ 2p₄

Z = 8, S = 2

Zeff = 8-2 = +6

Hence, the correct answer is second option, that is, +3 and +6, the Zeff of boron is smaller in comparison to O, thus, boron exhibits a bigger size than O.

3 0
3 years ago
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