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ohaa [14]
3 years ago
8

Plz help me and I promise I will make you he brainiest

Chemistry
1 answer:
a_sh-v [17]3 years ago
6 0

Answer:

2

Explanation:

1 is definitely wrong

density must be lower to atop another liquid

in 3 ,I consider the example of water and oil whi has a lower boiling point

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Who identified the electron?
liraira [26]

George Johnstone Stoney

8 0
3 years ago
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How many moles of N2O3 contain 2.55 × 1024 oxygen atoms
Varvara68 [4.7K]
1mol   ------------   3×6,02×10²³ oxygen atoms
x          ------------   2,55×10²⁴

x = 2,5×10²⁴ × 1mol / 3×6,02×10²³ ≈ 0,138*10 mol = 1,38mol

6 0
2 years ago
Compare and contrast diffusion and osmosis. Include at least one similarity and one difference between the two processes.
Softa [21]
Osmosis is the diffusion of water <span>across a semipermeable membrane (usually cell membrane) from a region of low solute concentration to a more concentrated solution so it can reach equilibrium (balance). 

D</span>iffusion is <span>a spontaneous movement of particles from an area of high concentration to an area of low concentration.

Both results in particles moving and help balance out the concentrations.
Also, in osmosis, the water molecules are moving. In diffusion, it is the solutes moving.

I hope this helps and explains well.</span>
4 0
3 years ago
How many moles of electrons is required to deposit 5.6g of iron from a solution of iron (2) tetraoxosulphate(6)
yuradex [85]

Answer:

0.20 mol

Explanation:

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Fe²⁺ + 2 e⁻ ⇒ Fe

The molar mass of Fe is 55.85 g/mol. The moles corresponding to 5.6 g of Fe are:

5.6 g × 1 mol/55.85 g = 0.10 mol

2 moles of electrons are required to deposit 1 mole of Fe. The moles of electrons required to deposit 0.10 moles of Fe are

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7 0
3 years ago
Explain why is it better to use images on hazard labels, rather than words
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In the case of an emergency where you might not have enough time to read several lines of writing, not to mention trying to find the hazard warnings when the whole bottle is probably covered in writing, it is much easier to locate and read universal hazard symbols.
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3 years ago
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