Https://www.google.com/search?q=how+to+solve+fir+atomic+mass+in+chemisty&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari#kpvalbx=1
Here is the link to a great video that explains your question nicely, hope this helps.
Liquid? maybe, its really inbetween if you get what i mean
Fine particles, ground level ozone, sulfur dioxide, nitrogen dioxide, lead
Answer:
126 m
Explanation:
Distance=time*speed➡42*3=126m.
B. 35.45 ! Hope this helps