Answer
$4.5\%$ Hydrogen in Ascorbic Acid
Work Step by Step
HC6H7O6 = C6H8O6 = 6 Carbon, 8 Hydrogen, 6 Oxygen
Mass % = TOTAL Mass of element / Molar mass of the chemical compound * 100
Using the formula above, we simply find the specified values and plug it in:
TOTAL Mass of H = 8g (since there are 8 total hydrogen atoms)
Molar Mass (mm) of Ascorbic Acid = The sum of Multiplying each of the atomic weight of each atom by the number of each atom
Carbon: 6 * 12g = 72g
Hydrogen: 8 * 1 = 8g
Oxygen: 6 * 16g = 96g
72g + 8g + 96g
= 176 g of Ascorbic Acid (C6H8O6)
Now we can plug in the values:
Mass % of H = (8g/176g) * 100 = 4.5%
