A chemist must dilute 58.00ml of 13.5 aqueous silver(II) oxide solution until the concentration falls to 5.00M. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Round your answer to 3 significant digits.

Explanation:

The given solution of silver oxide = 58 ml of 13.5 M of silver oxide

When we increase its volume , its molar concentration becomes less . To calculate the concentration of diluted solution , we can apply the following relation .

S₁ V₁ = S₂ V₂ .

S₁ is molar strength when volume is V₁ . S₂ is molar strength when volume is V₂

Puting the given values in the formula above ,

58 x 13.5 M = V₂ x 5

V₂ = 58 x 13.5 / 5

= 156.6 ml .

= 157 ml after rounding off.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27