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Nata [24]
3 years ago
5

An element's atomic number is 87. how many protons would an atom of this element have

Chemistry
1 answer:
andreev551 [17]3 years ago
5 0
atomic number is equal to proton number
so the proton number will be 87
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Which two trials could be used to measure the surface area
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3 years ago
A 35.0 ml sample of 0.225 m hbr was titrated with 42.3 ml of koh. What is the concentration of the koh?
Lemur [1.5K]

Answer:

The concentration of KOH is 0.186 M

Explanation:

First things first, we need too write out the balanced equation between HBr and KOH.

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KOH (aq) + HBr (aq) → KBr (aq) + H2O (l)

From the reaction above, we can tell that it takes 1 mole of KOH to react with 1 mole of HBr.

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\frac{CaVa}{CbVb}  = \frac{na}{nb}

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v is the volume

So

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