football4life10 football4life10
  • 26-02-2021
  • Mathematics
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Helpppppppppppppp!!!!!

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samuel4933
samuel4933 samuel4933
  • 26-02-2021

Answer:

60°

Step-by-step explanation:

angle at a point is 360°

add your given angles and minus it from 360°

40°+105°+155°=300

360°-300°=60°

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Background Info:The standard enthalpy of formation (ΔH∘f) is the enthalpy change that occurs when exactly1 mol of a compound is formed from its constituent elem