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Jim: Man-made elements, survival of?

Will man-made elements survive when the sun eventually begins to die out and engulf the earth? Will that be our only legacy? Thank you for your time!

Answer:

Jim

many man made elements probably will not survive but undergo fusion reactions. Juding from the behavior of man kind, life on earth will probably not exist anymore at the time the sun dies out.

Regards
Oliver Reiser

 

Kewal: Moles and Equivalent

What is the mass of 6.02 x 1023 molecules of H2CO3?

Answer:

Kewal,

this is 1 mol, so it is 2x1 + 12 + 3x16

Regards
Oliver Reiser

 

Kewal: Moles and Equivalent

What is the molar mass of K2Cr2O7?

Answer:

Kewal,

check the periodic table, you will find the mass of each element, and then you need to add it up according to the formula given.

Regards
Oliver Reiser

 

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