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juin [17]
3 years ago
12

please help due in 1 hour. This is 7th grade science. & in return I’ll help you on something! 15 points

Chemistry
1 answer:
MA_775_DIABLO [31]3 years ago
8 0

Answer: MCCCMC

Please. Mark as brainliest

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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
erma4kov [3.2K]

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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5 0
2 years ago
Which statement best describes science?
mrs_skeptik [129]

Explanation:

science can answer any and all questions

4 0
3 years ago
On a number line, the number O would make a good...
AVprozaik [17]

Answer: Base point

Explanation: Base point

8 0
3 years ago
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How many electrons are there in 2 g of H2
KiRa [710]

Answer:

6.02 x 10²³ electrons

Explanation:

Given parameters:

Mass of H₂  = 2g

Unknown:

Number of electrons = ?

Solution:

To find the number of electrons, we must determine the number of moles of H₂ first.

 Number of moles  = \frac{mass}{molar mass}  

  Molar mass of H₂   = 2(1)  = 2g/mol

Number of moles  = \frac{2}{2}   = 1mol  

1 mole of a substance contains 6.02 x 10²³ particles

the particles can be protons, neutrons, electrons

So,

  2g of H₂ will contain 6.02 x 10²³ electrons.

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3 years ago
What is the avrage atomic mass of zinc
pychu [463]

65.38 u ± 0.002 u there you go

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