Calculate the approximate number of atoms in a bacterium. Assume the average mass of an atom in the bacterium is 10 times the mass of a proton.

A typical atom has a diameter of about 1 × 10^ -10 m. (a) What is this in inches? (b) Approximately how many atoms are along a 1.0-cm line, assuming they just touch?

If you used only a keyboard to enter data, how many years would it take to fill up the hard drive in your computer that can store 95gigabytes95gigabytes (95×109bytes95×109bytes) of data? Assume "normal" eight-hour working days, and that one byte is required to store one keyboard character, and that you can type 180 characters per minute. Express your answer using two significant figures.

The density of bubble gum is about 1g/cm3. You blow an 8g wad of gum into a bubble 9cm in diameter. What is the thickness of the bubble? Use the equation: 4πr2 to help solve the problem.

If the radius of a CD-ROM is 6 cm, what is the average area taken up by each bit if the total number of bits stored is 6 billion (6 x 109) bits?

One mole of atoms consist of 6.02 × 10^23 individual atoms. If one mole of unicorn atoms were spread uniformly over the surface of a sphere the size of the Earth, approximately how many atoms would be found per square meter? The average radius of the Earth is 6.38 × 10^3 km.

A pyramid has a square base of side x and height h. The volume V of the pyramid is given by the expression: V - x²h 3 If V is measured to 5% and h is measured to 3%, what is the percentage uncertainty of ? Remember to include the % symbol with your answer.

Estimate the number of molecules that make up Earth, assuming an average molecular mass of 30 g/mol. (Note there are on the order of 1024 objects per mole.)

The common Eastern mole, a mammal, typically has a mass of 75 g, which corresponds to about 7.5 moles of atoms. (A mole of atoms is 6.02 * 1023 atoms.) In atomic mass units (u), what is the average mass of the atoms in the common Eastern mole?