D. Aparear la función con el compuesto que corresponda: 37. ( ) Oxido básico A. CuOHNO3 38. ( ) oxido ácido В. NaH2PO4 39. ( ) Hidróxido C. Al2O3 40. ( ) Acido Hidrácido D. KCaPO4 41. ( ) Acido oxácido E. K2SO4 42. ( ) Sal Haloidea F. HI 43. ( ) Oxisal ácida G. HCIO4 44. ( ) Oxisal básica H. SO3 45. ( ) Sal doble 1. NaI 46. ( ) Hidruro J. Ca(OH)2 47. ( ) Peróxido K. NaH 48. ( ) Sal neutra L. Na2O2

i believe it is 40–40–20%

explanation:

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

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.