The chemical standard for the quantity of a mole is based on which substance? a. hydrogen-1 b. helium-2 c. oxygen-16 d. carbon-12

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Find the mass, in grams, of 5.00*10^23 molecules of f2

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?