Could you please help me? This is so confusing!?

Question

During a moon landing, one of the experiments performed was the measurement of the intensity of solar wind. As a collector, an aluminum strip of about 3,000.000 square centimeters was used. It was found that in 100.00 minutes, a mass of 3.00 x 10^-10g of hydrogen was collected. What is the intensity of the solar wind (number of atoms per sq. centimeter per second?).

Answer 1

(3.00 x 10^-10g) / (3,000.000 cm^2 * 100.00*60s)
you get g/(sxcm^2), right?
Now, 1gram of hydrogen atom is of 6.022x10^23 hydrogen atoms. Hence the answer you are looking for is:
(6.022x10^23 atoms/g) * (3.00 x 10^-10g) / (3,000.000 cm^2 * 100.00*60s)
you do the math.