How many seconds does it take to deposit 0.94 g of Ni on a decorative drawer handle when 14.9 A is passed through a Ni(NO3)2 solution? Molar mass of Ni is 58.69 g/mole. Faraday constant=96485 C/mole. Enter numbers into 1 decimal places.

Time take to deposit Ni is 259.02 sec.

Explanation:

Given:

Current A

Faraday constant

Molar mass of Ni

Mass of Ni g

First find the no. moles in Ni solution,

Moles of Ni

                    mol

From the below reaction,

  ⇆

Above reaction shows "1 mol of requires 2 mol of electron to form 1 mol of "

So for finding charge flow in this reaction we write,

Charge flow C

For finding time of reaction,

Where charge flow

    sec

Therefore, time take to deposit Ni is 259.02 sec.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance