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prohojiy [21]
3 years ago
5

Can someone please help me with this its about working safely in a lab

Chemistry
1 answer:
Greeley [361]3 years ago
8 0
I is Gas under pressure.
D is Corrosive.
F is Harmful to environment.
C is oxidizing*.
A is Explosive.
E is Toxic.
H is Long term health hazard.
G is Moderate health hazard.
...That's all I know

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if Fe(NO3)3 is dissolved in enough water to make exactly 323 ml of solution, what is the molar concentartion of nitrate ion g
Ilya [14]

The given question is incomplete. the complete question is : If 5.15 gFe(NO_3)_3 is dissolved in enough water to make exactly 323 ml of solution, what is the molar concentartion of nitrate ion.

Answer:  The molar concentartion of nitrate ion is 0.195.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Given : 5.15 g of Fe(NO_3)_3 is dissolved

Volume of solution = 323 ml

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{5.15g}{242g/mol}=0.021moles  

V_s = volume of solution = 323 ml

Molarity=\frac{0.021\times 1000}{323}=0.065M

As 1 M of Fe(NO_3)_3 gives 3 M of NO_3^- ions.

Thus 0.065 M of Fe(NO_3)_3 gives  = \frac{3}{1}\times 0.065=0.195M of NO_3^- ions.

The molar concentartion of nitrate ion is 0.195.

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