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Monica [59]
3 years ago
7

In the formula for water H2O what is a subscript 2 indicate?

Chemistry
1 answer:
lara [203]3 years ago
8 0

There are two atoms of hydrogen molecules.

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Please give me the reasons of the solution!
irinina [24]

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In the raisin experiment what was your first step of the scientific method?
Stella [2.4K]
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avanturin [10]

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Read 2 more answers
The solubility of Cr(NO3)3⋅9H2O in water is 208 g per 100 g of water at 15 ∘C. A solution of Cr(NO3)3⋅9H2O in water at 35 ∘C is
Zinaida [17]

Answer:

102g of crystals

Explanation:

When the Cr(NO₃)₃⋅9H₂O is dissolved in water at 15°C, the maximum mass that water will dissolve in the equilibrium is 208 g per 100g of water. When you heat the water, this mass will increases.

In this problem, at 35°C the water dissolves 310g in 100g of water, as in the equilibrium at 15°C the maximum mass is 208g, the mass of crystals that will form is:

310g - 208g = <em>102g of crystals</em>

<em>-Crystals are the Cr(NO₃)₃⋅9H₂O that is not dissolved-.</em>

I hope it helps!

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If the hydrogen ion concentration is 10-7M, what is the pH of the solution?<br><br> Show all work.
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Remember pH=-log(H ions). So it would be pH=-log(10^-7).
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