Anyone know how i can make a 3D model of a hemoglobin molecule (online by the use of a website)?

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

Which of the following notations would be the appropriate and final way to display the formula for magnesium chloride a. mgcl2 b. mg+2cl–1 c. mgcl2 d. mgcl