3 years ago

How many moles are there in 54g of H2O? 3 1 6.022 x 1023 162

1 answer:

5 0

Hi! I calculated that the mols should be around 2.99 so rounded up the answer should be 3.

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lilavasa [31]

Answer:

$\frac{[magenta\ phenolphthalein]}{[colorless\ phenolphthalein]}=31.62$

Explanation:

Considering the Henderson- Hasselbalch equation for the calculation of the pH of the buffer solution as:

$pH=pKa+\log\frac{[base]}{[acid]}$

Where Ka is the dissociation constant of the acid.

pKa of phenolphthalein = 9.40

pH = 10.9

So,

$10.9=9.40+\log\frac{[magenta\ phenolphthalein]}{[colorless\ phenolphthalein]}$

$\frac{[magenta\ phenolphthalein]}{[colorless\ phenolphthalein]}=31.62$

4 0

3 years ago

Daniel [21]

The answer would be 56.096 x 68.932

8 0

4 years ago

Kazeer [188]

The symbol for hydrogen is H

3 0

3 years ago

Semenov [28]

Answer:

Negative 1.

Explanation:

Negative 1:- H-.

Examples of Hydrides are KH, NaH and LiAlH4.

6 0

3 years ago

PolarNik [594]

Answer:200ML

Explanation:from quiz ck-12

4 0

3 years ago