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Tasya [4]
3 years ago
14

Porque la quimica tiene relacion con otras ciencias

Chemistry
1 answer:
Sergeeva-Olga [200]3 years ago
5 0

Answer:

Si

Explanation:

Si

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Elements, Compounds,& Mixtures,
mrs_skeptik [129]

Answer:

1. Elements: F, H, E

2. Compounds: A, D, I

3. Mixtures: B, C, G

Explanation:

3 0
3 years ago
To break the oxygen-oxygen bonds in a single O2 molecule, 1 × 10–18 J of energy is required. Which of the following wavelengths
Sonbull [250]

E = hc/(lamda)

The lamda symbol is wavelength, which this site does not have. I can represent it with an "x" instead.

Plancks constant, h = 6.626×10^-32 J·s

Speed of light, c = 3.00×10^8 m/s

The energy must be greater than or equal to 1×10^-18 J

1×10^-18 J ≤ (6.626×10^-32 J·s)*(3.0×10^8 m/s) / x

x ≤ (6.626×10^-32 J·s)*(3.0×10^8 m/s) / (1×10^-18 J)

x ≤ 1.99×10^-7 m or 199 nm

The wavelength of light must be greater than or equal to 199 nm

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How did modern scientists experiment with Van Gogh's paints to determine their chemical reactions?
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I think the answer is A - they used X-ray analysis.

Explanation:

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Explain the difference between qualitative and quantitative properties.
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Qualitative properties are properties that are observed and can generally not be measured with a numerical result. They are contrasted to quantitative properties which have numerical characteristics.
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Which is a property of all atoms?
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B. a nucleus with a positive charge.
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