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3 years ago

FREE BRAINLIST NEED HELP ASAP

Chemistry

2 answers:

tamaranim1 [39]3 years ago

4 0

Answer is the first one ( F )

Vinil7 [7]3 years ago

3 0

Answer: F. Electrons

Explanation: hope it helped .u.

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A NaOH(aq) solution with a pH value of 13 is used to determine the molarity of a HCl(aq) solution. A 10.0-mL sample of the HCl(a

erica [24]

Answer:

pH of the H⁺(aq) is 0

Explanation:

It is possible to know the concentration of a HCl(aq) solution by titration with a solution of NaOH(aq) with known concentration. The reaction is:

HCl(aq) + NaOH(aq) → H₂O(l) + NaCl(aq)

The added moles of NaOH are equal to moles of HCl and as you know volume of HCl added you will obtain concentration of HCl.

Now, a solution of H⁺(aq) with a concentration 10 times greater than original NaOH(aq) solution -0.100M-, has a concentration of 1.00M H⁺(aq), the pH of this solution is:

pH = -log (1.00M H⁺(aq) = 0

That means pH of the H⁺(aq) is 0

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3 years ago

When do we classify a disease as epidemic

djyliett [7]

Explanation:

An epidemic (from Greek ἐπί epi "upon or above" and δῆμος demos "people") is the rapid spread of disease to a large number of people in a given population within a short period of time.

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3 years ago

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Ppredict the identity of the precipitate in the below reaction: BaCl2(aq) + K2SO4(aq) →

Annette [7]

Answer: The precipitate formed is $BaSO_4$

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid or precipitated form are represented by (s) after their chemical formulas.

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.

The balanced chemical equation is:

$K_2SO_4(aq)+BaCl_2(aq)\rightarrow BaSO_4(s)+2KCl(aq)$

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3 years ago

30 mL of 0.6 M HCl solution is neutralized with 90 mL NaOH solution. What is the concentration of the base? Show all work Please

skad [1K]

From

na=1

nb=1

Va=30mls

Vb=90mls

Ma=0.6M

Mb=?

from

Mb=Ma×Va×nb

 Vb×na

Mb=0.6×30×1

 90×1

mb=18

 90

Mb=0.2M

NaOH=40

From

conc=molarity×mr

conc=0.2×40

conc=8g/mol

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3 years ago

Who wana give me a free brainliest? i need 1 more <3

Triss [41]

Answer: me

Explanation:

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