Answer
2.5 x 10^21 Hydrogen Atoms
Work Step by Step
The sample of glucose has 1.250 x 10^21 Carbon atoms. Each glucose molecule has 6 Carbon atoms as can be seen form the formula C6H12O6. Therefore, if we divide the number of Carbon atoms by 6, we find how many glucose molecules we have. This is 1.250x10^21 / 6 = 2.08 x 10^20 glucose molecules.
Then, each glucose molecule has 12 Hydrogen atoms so we multiply this number by 12 to get the number of Hydrogen atoms:
2.08 x 10^20 * 12 = 2.5 x 10^21 H atoms
