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2 years ago

Hi there! Can someone help me with this, i need a proper answer, i don't need LINKS or FILES for the explanations.

Chemistry

1 answer:

valentina_108 [34]2 years ago

6 0

Answer:

Please see the attached picture for the full solution.

Explanation:

Alternatively, for problem #2, you can find the density in g/ml first then convert it to kg/m³.

$\boxed{ 1g/ml= 1000 kg/m^3}$

Density of liquid

= 45 ÷45

= 1 g/ml

= 1000 kg/m³

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Whats the strongest base on the ph scale? A.HCI B.NaOH C.blood D.saliva

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Answer:

NaOH

Explanation:

The sodium hydroxide is strongest base because it fully dissociate into ions.

It dissociate to gives the sodium and hydroxyl ions and solution became more basic.

NaOH → Na⁺(aq) + OH⁻(aq)

Its pH is 12. It is also known as caustic soda.

Other given Options:

The pH of blood is vary from 7.35 - 7.45. it is slightly alkaline.

The pH of HCl is 3.

The pH of saliva is 6.2 - 7.6.

We know that neutral pH is 7 the pH less than 7 is acidic so HCl is acidic because its pH is 3.

The pH is greater then 7 is basic so saliva and blood are basic but less than the NaOH.

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212 ml of lead nitrate is required to prepare a dilute solution of 820.7 ml of lead nitrate.

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Option A.

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