Please help!?

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

100 min= 100*60= 6000 s
the mass of hydrogen collected by sq centimeters by second is

3*10 ^-10/6000/3000000=1.667*10^-20g

an atom hydrogen has a mass of 1.008/6.02*10^23 =1.67*10^-24g
So number of hydrogen atoms= 1.667*10^-20/1.67*10^-24= 10^4

Approximately 10 thousands of atoms