I need these two questions answered will give Brainliest for them!! Combination of ∆H1, ∆H2, and ∆H3 needed (using Hess’s law):
The published value for this reaction is –603 kJ/mol. What is the percent error of your experimental value?

What is the smallest component or the most basic building block of any element ? a. an atom, b. a compound c. gas d. element

Acontrol during an experiment. might change remains constant does not exist does change

As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave