00:01
So here one application that is 0 .010 mm layer of chromium.
00:07
So it is deposited on a part with the total surface area it is given us total surface area.
00:19
Total surface area that is given us 3 .3 meters square.
00:24
This is from a solution it contains the chromium ions.
00:28
From a solution it contains chromium ions.
00:33
So here they have asked how long that it would take to deposit the layer of chromium to deposit layer of chromium layer of chromium if the current so if the current was so here the current it is given 33 .46 ampia and the density of chromium metal also here it is given density of chromium metal also it is gibralian that is 7 .19 gram per centimeter cube so here we have to find out the volume of chromium so whenever so by using this data we can easily find out the volume of chromium so what is given the chromium surface area it is given so the chromium surface area it is given 3 .3 meters square then what is given and the thickness also it is given what is the thickness here the thickness here it is 0 .010 mm so that is converted into one meters 1 1 into 10 to the power of minus 5 meters now we have to find out the volume of chromium how to find out volume of chromium it is given by area into thickness area into thickness what is the area here the area here it is the area it is the one in that is a 3 .3 meter square and here the thickness it will be the 1 .1 into 1 .1 into 1 .1 into thickness here 1 into 10 to the power of minus 5 meter so whenever we calculate this we'll get 33 this is the volume of chromium what is the volume of chromium that is 33 centimeter cub because here the conversion factor here it is 3 .3 into 10 to the power of 2 centimeter cube that is the volume so whenever we convert 3 .3 into 10 to the power of minus 5 meters into centimeter that it will be 3 .3 3 .3 into 10 to the power of 2 cm.
03:10
So whenever we do this, it will become 33 centimeters.
03:15
Now here we have to find out.
03:18
So here we have to find out amount of chromium.
03:23
So how to find out amount of chromium? here they have given density.
03:29
Density value 7 .19 gram per centimeter...