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Alex Ar [27]
3 years ago
13

How many H atoms are in 6.43g x 10^24 molecules of water

Chemistry
1 answer:
kow [346]3 years ago
5 0

Answer:

12.86\times 10^{24} atoms of hydrogen

Explanation:

The molecular formula for a water molecule is H_2O.

From the above formula, we can conclude that 1 molecule of water contains 2 atoms of hydrogen and 1 atom of oxygen.

There are 6.43\times 10^{24} molecules of water.

1 molecule of water = 2 atoms of hydrogen.

∴ 6.43\times 10^{24} molecules of water = 2\times 6.43\times 10^{24}=12.86\times 10^{24} atoms of hydrogen.

Therefore, there are 12.86\times 10^{24} atoms of hydrogen in 6.43\times 10^{24} molecules of water.

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A group of students is comparing the graphs of strong acid-strong base and weak acid-strong base titration curves, where the bas
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The initial pH for the weak acid-strong base curve is higher than the initial pH for the strong acid-strong base curve. Hence, option A is correct.

<h3>What is a weak acid?</h3>

Weak acids are acids that don't completely dissociate in solution.

A weak acid is an acetic acid. It has a of 1.8⋅10^{-5}. Calculate how much it will dissociate in water. Since acetic acid is a weak acid so large part will not dissociate completely.

k_a=\frac{[CH_3COO^-]H^+]}{[CH_3COOH]}

B is not true, it shows the titration curve for weak/strong acid titrated with a strong base. When choosing an indicator for colourimetric titration select one so that the pH jump at the equivalence point contains the interval p±1. Phenolphthalein has a p≈9, so to decide if it is a suitable indicator check if the pH jumps from 8 to 10 at the equivalence point.

C is not true either because of the very slow reaction.

Learn more about weak acid here:

brainly.com/question/12811944

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