Marquel

Please check (5^3) (5^9) is the answer 60 Need help with this one (3x-2) and (5x^2+3x)

Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D Use the following data: Substance ΔH∘f (kJ/mol) A -247 B -375 C 191 D -483 Express your answer to three significant figures and include the appropriate units. My answer was 285 kJ/mol but...

Write an algebric expression to represent the phrase "subtract t from 9."