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Alex73 [517]
2 years ago
9

Someone help this is physical science 8th grade

Chemistry
1 answer:
photoshop1234 [79]2 years ago
5 0
This is because the red filter only allows red light through. The other colours(wavelengths) of the spectrum are absorbed. Similarly, a green filter only allows green light through.
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An unknown material has a mass of 5.75 g and a volume of 7.5 cm3.
Shtirlitz [24]

Hey there!:

Mass = 5.75 g

Volume = 7.5 cm³

Therefore:

Density = mass / volume

D = 5.75 / 7.5

D = 0.7 g/cm³

Answer C

Hope that helps!

3 0
3 years ago
Write the ka expression for an aqueous solution of hypochlorous acid:
sveticcg [70]
Balanced chemical reaction (dissociation) of <span>an aqueous solution of hypochlorous acid:
HClO(aq) </span>⇄ H⁺(aq) + ClO⁻(aq).
Ka = [H⁺] · [ClO⁻] / [HClO].
[H⁺] is equilibrium concentration of hydrogen cations or protons.
[ClO⁻] is equilibrium concentration of <span>hypochlorite anions.
</span>[HClO] is equilibrium concentration <span> of hypochlorous acid.
</span>Ka is t<span>he acid dissociation constant.</span>
7 0
3 years ago
Which of these is not an example of a molecule?
r-ruslan [8.4K]

Answer:

D

Explanation:

5 0
4 years ago
Aluminum has density of 2.7g/cm3.<br><br> What is the mass of 35 cm3 aluminum in g?
Sveta_85 [38]

Answer:

density= 2.7 g/cm3

volume= 25 cm3

mass = density× volume

= 35×2.7

= 94.5 g

7 0
3 years ago
The variable that we change or test in an experiment is called the
Anastaziya [24]

the variable that we change in an experiment is the Independent Variable. The dependent variable is the outcome and the constant is what remains the same throughout the experiment.

4 0
3 years ago
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