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svp [43]
3 years ago
5

I need help!!!!!!! please

Chemistry
1 answer:
lions [1.4K]3 years ago
8 0

Answer:

A. bacteria

Explanation:

can i have brainlest?

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Need help w the questions in the pic! thankyouu
katrin [286]

Answer: Here are the answers

Explanation:

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3 years ago
Number of electrons present in 3.6mg of NH₄⁺?​
nata0808 [166]
0.0036g of NH4+ x 1mol of NH4+/18.04g of NH4+ x 6.02*10^23 electrons of NH4+/1mol of NH4+

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3 years ago
Explain the difference, with sketches, between the titration curves of monoprotic acid and a triprotic acid.
kvasek [131]

Answer:

A monoprotic acid has only one equivalence point in a titration curve while a triprotic acid has three equivalence points.

Explanation:

Monoprotic acids, HA, are acids that are able to donate one proton per molecule during the process of ionization or dissociation as shown below:

HA ----> H⁺ + A⁻

A triprotic acid is a polyproprotic acid, that is acids that can donate more than one proton per molecule during ionization. a triprotic acid can donate three protons per molecule during the process of ionization. The dissociation of a triprotic acid is shown below;

H₃A -----> H₂A⁻ + H⁺

H₂A⁻ ----> HA²⁻ + H⁺

HA²⁻ -----> A³⁻ + H⁺

The value Ka, is known as the acid dissociation constant. It is found by looking at the equilibrium constant for the dissociation of the acid. The higher the Ka, the more the acid dissociates

A titration curve is the plot of the pH of the analyte solution versus the volume of the titrant added as the titration progresses.

In a titration curve in which base is added to acid, the pH rises slowly until the equivalent point at which point the pH remains constant before it begins to rise again on the addition of more base.

In a titration curve of a monoprotic acid, there is only one region in which the equivalence point is obtained corresponding to the point of acid of dissociation of all its protons.

In the titration curve of a triproprotic acid, three equivalent points are obtained corresponding to the point of dissociation of each of three protons of the triprotic acid.

The titration curves are shown below

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3 years ago
Which of the following was a major contribution to chemistry by Antoine Lavoisier
omeli [17]
Antoine Lavoisier proved that oxygen is required for material to burn. Without oxygen, the fire goes out which is easily testable.
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How many significant figures<br> are in this number?<br> 107.051
Anestetic [448]

Answer:

there are 6 significant figures in 107.051

7 0
3 years ago
Read 2 more answers
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