hydrogen is the lightest element in the periodic table
The gas flows from higher concentration/pressure to lower concentration/pressure, which is outside the ball.
Answer:
Hydrogen is an element
Explanation:
Hydrogen is an element with only hydrogen atoms, whereas air, carbon dioxide, and water are all made up of multiple elements with different types of atoms.
If 200cm^3 takes 10secs then 120 will take 6secs. i hope u understood
Also water H2O is made of H+ and OH- ions. so when an acidic substance is added to water the concentration of H+ ions increase.