Calculate the empirical or molecular formula mass and the...

Calculate the empirical or molecular formula mass and the molar mass of each of the following minerals: (a) limestone, $\mathrm{CaCO}_{3}$ (b) halite, $\mathrm{NaCl}$ (c) beryl, Be $_{3} A$ l $_{2} S$ i 6 ) $_{18}$ (d) malachite, $\mathrm{Cu}_{2}(\mathrm{OH})_{2} \mathrm{CO}_{3}$ (e) turquoise, $\operatorname{CuAl}_{6}\left(\mathrm{PO}_{4}\right)_{4}(\mathrm{OH})_{8}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}$

Transcript

00:01 Hey welcome to the video we have the calcium carbonate and the molar mass of calcium carbonate would be we have calcium 1 and the molar mass of calcium is 40 .078 so it would be equal to 40 .078 and we have one carbon and the molar mass of carbon is 12 .00 so it would be 12 .00 and we have 3 oxygen and molar mass of carbon is 12 .00.

00:30 One oxygen is 16 .00 so therefore it would be equal to 48 .00 and therefore from this the molar mass of calcium carbonate on summing this up it would be equal to 100 .078 gram per mole and next we have nacl or halite where we know that na is 1 and the molar mass of n.

01:01 That is sodium is 22 .9 .9 which would be equal to 22 .989 and one chlorine and the molar mass of chlorine is 35 .453 which would be equal to 35 .453 and therefore from this the molar mass of hairlight or enice here is equal to 58 .442 gram per mole and next.

01:31 Next we have beryl or we have the chemical formula of mixed to be b .e.

01:43 Thrice, al2, s .i .6 -o -18.

01:51 And here we have three atoms of beryllium and the molar mass of one beryllium is 9 .01 -21.

01:59 So it would be equal to 27 .0363.

02:03 3 and we have 2 atoms of aluminum and the molar mass would be 26 .98.

02:12 So this would be equal to 53 .96.

02:17 And we have 6 atoms of silicon and 1 atom silica waste 28 .0855.

02:29 So this would be equal to 168 .513.

02:35 And next we have.

02:37 18 atoms of oxygen and the molar mass of one oxygen is 16.

02:42 So this would be equal to 288...

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