There is 43.56 g of sugar in 12 oz serving of soda. According to the information in the question.
We know that we must first convert the unit of volume from oz to millilitre as follows;
1 Oz = 30 mL
12 oz = 12 oz × 30 mL/1 Oz
= 360 mL
If 1 mL of soda contains 0.121 g of sugar
360 mL of soda contains 360 mL × 0.121 g / 1 mL = 43.56 g of sugar
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