The answer is stationary bc between those two times the car is not moving as seen by the flat line
8) 21.504 liters of gas
9) 122.5 g
10) 6.022*10^23
Explanation:
8)
1 mole= 22.4 liters
to calculate the volume of gas of 0.960 moles of CH4
22.4*0.960/1
= 21.504 liters of gas
9)
2.0 mole*18.02 g/ 1 mole
=122.5 g
10)
2.0 l * 1 mole/22.4 l
6.022*10^23
Henri Becquerel is the first scientist who discover evidence of radioactivity.
Maria Curie is one of the most famous scientists in the world who invented the word "radioactivity". She discovered that radioactive materials gave out rays and discovered two elements: polonium and radium, which are extraordinary active.