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Please help need it by 11 tonight!: Express your answer using two significant figures.
A.) 195 mL of 0.33 M NaNO3. N= mol
B.) 500 mL of 1.7 M HNO3. N= mol
Also,
How many milliliters of 0.400 M HCl solution can be made from 50.0 mL of 12.0 M HCl solution? V= mL

Respuesta :

Eduard22sly

Answer:

A. 0.064mol

B. 0.85mol

C. 1500mL

Explanation:

A. Molarity = 0.33M

Volume = 195mL = 195/1000 = 0.195L

Mole =?

Molarity = mole /Volume

Mole = Molarity x Volume

Mole = 0.33 x 0.195

Mole = 0.064mol

B. Molarity = 1.7M

Volume = 500mL = 500/1000 = 0.5L

Mole =?

Molarity = mole /Volume

Mole = Molarity x Volume

Mole = 1.7 x 0.5

Mole = 0.85mol

C. C1 = 12M

V1 = 50mL

C2 = 0.4M

V2 =?

Using the dilution formula C1V1 = C2V2, we find the volume of the diluted solution as follows:

C1V1 = C2V2

12 x 50 = 0.4 x V2

Divide both side by 0.4

V2 = (12 x 50) /0.4

V2 = 1500mL

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