Determine the mass of carbon iv oxide ,produced on burning 104g of ethyne

163 grams (3 sig. fig.).

All carbon atoms in that 104 grams of ethyne will end up in . Number of moles of molecules in 104 grams of ethyne:

.

There are two carbon atoms in each ethyne molecule. Number of carbon atoms in that many ethyne molecules:

.

There are one carbon atom in each molecule. In case oxygen is in excess, all those carbon atoms from that 104 grams of ethyne will make of .

Mass of all those molecules:

. (3 sig. fig. as in the mass of ethyne.)

-be a crystalline solid

- be soluble in water

-conduct electricity

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