1. A carbon atom is 12 times heavier than a hydrogen atom, and an oxygen atom is 16 times heavier than a hydrogen atom. If glucose (C₆H₁₂O₆) is chemically decomposed, what will be the ratio of the weights of the resulting elements.
2. The universe is a million trillion seconds old. Write this in powers of 10 notation.
3. The average weight, per atom, of the atoms in your body is about 10^-26 kg (2 x 10^-26 pounds). About how many atoms are there in your body?
4. Write the following in powers of 10 notation: 3 trillion; five-thousandths; 730,000,000,000,000; 0.000000000082