The rate constant for the gaseous reaction h2(g) + i2(g) → 2hi(g) is 2.42 × 10−2/(m·s) at 400°c. initially an equimolar sample of h2 and i2 is placed in a vessel at 400°c and the total pressure is 1670 mmhg. (a) what is the initial rate (m·min) of formation of hi? (b) what are the rate of formation of hi and the concentration of hi (in molarity) after 14.5 min? rate of formation = (m/min) [hi] = m

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este