I think this is the answer try it
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Answer:
On the placement of hydrogen and helium in the periodic system
H1=1
He2=2
Answer:A. An increase in temperature increases the reaction rate.
Explanation:because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.
C. NO2 is covalent. Hope this helps!
If the two gases has a total pressure of 5.7 atm and one of the gases has a partial pressure of 4.1 the the other one has the pressure of 1.6