Answer the questions about the following reaction. 2K(s) + Br2(l) 2KBr(s)

How many molecules of Br are used in the reaction?
1,2,or3
How many bromine atoms are used in the reaction?
1,2,3,or4
How many moles of KBr are formed?
1,2,3,or4
What is the mole ratio of Br2 to KBr?
1/2,1/1,or 3/2

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

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