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Gemiola [76]
3 years ago
7

Which of these measurements was made with the most precise measuring device: 8.1956m, 8.20m, or 8.196m?

Chemistry
2 answers:
tigry1 [53]3 years ago
8 0
If I’m correct I believe it’s 8.1956m.
grandymaker [24]3 years ago
7 0

Answer:

8.1956m

Explanation:

8.1956m is the most accurate due to the fact that there is more decimal places in the measurement than the other two.

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An acid with molar mass 84.48 g/mol is titrated with 0.650 M KOH. What volume of KOH solution is needed to titrate 1.70 grams of
RSB [31]

Answer:

V=0.0310L=3.10mL

Explanation:

Hello.

In this case, since the acid is monoprotic and the KOH has one hydroxyl ion only, we can see that at the equivalence point the moles of both of them are the same:

n_{acid}=n_{KOH}

Thus, since we are given 1.70 g of the acid, we compute the moles of acid that were titrated:

n_{acid}=1.70g*\frac{1mol}{84.48g}=0.0201mol

Which equal the moles of KOH. In such a way, since the molarity is defined as moles over liters (M=n/V), the liters are moles over molarity (V=n/M), thus, the resulting volume is:

V=\frac{0.0201mol}{0.650mol/L}\\\\V=0.0310L=3.10mL

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3 years ago
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How many grams is needed to make the following solution?
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c

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