A student used a DCP solution (standardized to 9.94x10-4M) to analyze a sample of extract from 3.50g of solid food. The titration required 22.49mL of DCP. 91.75% of all the ascorbic acid in the food was collected in the extract. (MM Ascorbic Acid = 176.124 g/mol)

What mass of food (in grams) would be required to attain the RDA of ascorbic acid (60 mg)

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the answer is 75.0%.

answerlinnaeus;

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.