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MakcuM [25]
3 years ago
9

Last science question!! Thank you all for the help!

Chemistry
1 answer:
AlladinOne [14]3 years ago
5 0

Answer 11 moles of O2 and 10 moles of H2O

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Whats the strongest base on the ph scale? A.HCI B.NaOH C.blood D.saliva
Zepler [3.9K]

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.

3 0
3 years ago
I’m confused on this concept please help asap!
mixas84 [53]
No because it is a gas so (in space) so, it would most likely stay in one place. Your welcome!
5 0
3 years ago
The image shows sedimentary rock layers with index fossils and a fault.
GrogVix [38]

Answer:

Layer 2 and layer 9 is the same relative age since it is the same type of rock and has the same fossils.

Hope this helped!

4 0
3 years ago
4.A 100 L sample of gas is at a pressure of 80 kPa and a temperature of 200 K. What volume does the same
dexar [7]

Answer:

V₂ = 107.84 L

Explanation:

Given data:

Initial volume = 100 L

Initial pressure = 80 KPa (80/101 =0.79 atm)

Initial temperature = 200 K

Final temperature =273 K

Final volume = ?

Final pressure = 1 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁T₂  /T₁P₂

V₂ = 0.79 atm × 100 L × 273 K / 200 K × 1 atm

V₂ =21567 atm.L.K /200 K.atm

V₂ = 107.84 L

8 0
3 years ago
A student does an experiment to determine the molar solubility of lead(II) bromide. She constructs a voltaic cell at 298 K consi
attashe74 [19]

Answer:

The molar solubility of lead bromide at 298K is 0.010 mol/L.

Explanation:

In order to solve this problem, we need to use the Nernst Equaiton:

E = E^{o} - \frac{0.0591}{n} log\frac{[ox]}{[red]}

E is the cell potential at a certain instant, E⁰ is the cell potential, n is the number of electrons involved in the redox reaction, [ox] is the concentration of the oxidated specie and [red] is the concentration of the reduced specie.

At equilibrium, E = 0, therefore:

E^{o}  = \frac{0.0591}{n} log \frac{[ox]}{[red]} \\\\log \frac{[ox]}{[red]} = \frac{nE^{o} }{0.0591} \\\\log[red] =  log[ox] -  \frac{nE^{o} }{0.0591}\\\\[red] = 10^{ log[ox] -  \frac{nE^{o} }{0.0591}} \\\\[red] = 10^{ log0.733 -  \frac{2x5.45x10^{-2}  }{0.0591}}\\\\

[red] = 0.010 M

The reduction will happen in the anode, therefore, the concentration of the reduced specie is equivalent to the molar solubility of lead bromide.

7 0
3 years ago
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