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Inga [223]
3 years ago
10

Which of the following is the best definition of a scientific theory?Help me plz

Chemistry
1 answer:
tatiyna3 years ago
7 0
A scientific theory is a well tested explanation of a natural phenomenon.
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Which of the following is true of a buffered solution? Group of answer choices All of these are true The solution resists any ch
olya-2409 [2.1K]

Answer:

All of these are true

Explanation:

A buffer solution in chemistry is a solution that resists changes in pH when an acid or base is added to it. It is a solution that contains a weak acid and its conjugate base (anion) or a weak base and its conjugate acid.

A buffer is able to resist a change in pH due to the conjugate base and conjugate acid of the weak acids and bases contained in them respectively. The conjugate base/acid are present in an equilibrium quantity with their acid/base counterparts and help to neutralize or react with any additional H+ or OH- from an acid or base added to their solution.

However, when a strong acid or base is added to the buffer solution, there is only a slight change which practically does not change the pH of the solution.

Hence, all of the above options about a buffered solution is true.

5 0
3 years ago
the relative molecular mass of sodium hydroxide is 40. if 60 grams of sodium hydroxide are dissolved in water how many moles wil
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The formula to find the amount of moles of a substance used is: actual mass divided by relative molecular mass. 

Therefore,
60/40 = 1.5 moles
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