Choose all the answers that apply. Which of the following occurs during data analysis?

observations are made
data is collected
graphs are created
mathematical calculations are completed
statistical information is calculated

Use the standard enthalpies of formation for the reactants and products to solve for the δhrxn for the following reaction. (the δhf of c2h4 is 52.26 kj/mol, co2 is -393.509 kj/mol, and h2o is -241.818 kj.) c2h4 (g) + 3o2(g) 2co2 (g) + 2h2o(g) δhrxn = the reaction is .

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Which type of fossil does this image depict?