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13 simple chemistry numerical calculating moles
Typology: Exercises
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Three conversions to remember about chemicals – usually used when we are asking about just one chemical:
02 𝑥 1023 𝑎𝑡𝑜𝑚𝑠 1 𝑚𝑜𝑙 ) = 1.07 x 10^22 atoms Au
0.975 mol (
3.59 x 10^19 atoms Ar ( 1 𝑚𝑜𝑙
02 𝑥 1023 𝑎𝑡𝑜𝑚𝑠
4 𝐿 1 𝑚𝑜𝑙 ) = 0.00134 L Ar gas
Four oxygens = 64.00 grams, H 2 SO 4 total = 98.09 grams. So percent oxygen is (
Two hydrogens in water = 2.02 grams, H 2 O = 18.02 grams So percent H is (
02 𝑔 ) x 100% = 11.2%