Answer:
i think its c [everything is so blury]
Explanation:
Explanation:
Rate of the reaction ,k=
Half life of the
(first order kinetics)
Half life of the is 20,502.958 seconds.
Integrated rate equation for first order kinetics in gas phase is given as:
p= pressure of the gas at given time t.
= Initial pressure of the gas
(i) When, t = 50 sec
p = 500.49 Torr
(ii)When, t = 20 min = 1200 sec
p = 519.83 Torr
The empirical formula is CH2O bc you divide the percent and the mass of the element, Carbon 40/12.01=3.33, Hydrogen 6.7/1.01=6.63, Oxygen 53.3/16.00=3.33, then divide the lowest number which is 3.33 to all Carbon 3.33/3.33=1, Hydrogen 6.63/3.33=1.99 but rounds to 2, Oxygen 3.33/3.33=1
1 mole Zn ---------- 6.02 x 10²³ atoms
0.750 moles Zn ----- ?
atoms = 0.750 * ( 6.02 x 10²³ / 1 )
= 4.515 x 10²³ atoms
hope this helps!