This for metal......the farther to the left the more reactive they are. Group 1 metals, which include sodium and potassium, are so highly reactive that they do not exist in nature by themselves
Thats non metals..........the farther to the right the more reactive they are *with the exception of group 18* which are the noble gases and do not react at all. The most reactive are group 17, which include fluorine and chlorine. These non-metals, like group 1, rarely exist by themselves because of their high reactivity.
2MnO4 - + Fe2+ ------> Fe2(MnO4)2
Answer: Number of balloons that can be filled with He are 1397.
Explanation:
The given data is as follows.
V = 25 L He
, P = 131 atm
T =
= (19 + 273) K
= 292 K
According to ideal gas equation,
PV = nRT
where, n = 
= 
= 136.76 mol of He
The data for small balloons is given as follows.
T =
= (27 + 273) K
= 300 K
P = 732 = 0.963 atm
V = 2.50 L
Now, we will calculate the number of moles as follows.
n = 
= 
= 0.098 mol
So, number of balloons that can be filled with He are calculated as follows.
n =
= 
= 1397.60 balloons
or, = 1397 balloons (approx)
Thus, we can conclude that number of balloons that can be filled with He are 1397.
Answer:
set, variety, family, species,
Explanation: