Which process results in a chemical change?

(1) tearing tin foil

(2) melting an iron bar

(3) crushing an aluminum can

(4) burning magnesium ribbon

How many people in the United states depend on groundwater

What is one way an erupting volcano could have a global effect on ecosystems

Which of the following correctly applies to a reaction mechanism?1. The elementary steps must sum to the overall reaction. 2. The rate-determining step limits the overall rate of the reaction. 3.

Consider the rate below R=K (L) ^2 (XY) What is the overall order of the reactants in this reaction? 0 1 2 3

Consider the following reaction:CaCO3 (s) →CaO (s) + CO2 (g). Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.) A. 285 KΔG∘ = B. 1025 KΔG∘=C.

What organelle does the process of cellular respiration?

How much heat is absorbed during production of 127 g of NO by the combination of nitrogen and oxygen? N2 (g) + O2 (g) →2NO (g), ΔH = + 43 kcal/mol

Which of the following is the result of the process that binds many amino acids on to another? a. protein b. allele c. dna d. rna

What does the electron transport chain do to the concentration of hydrogen ions (protons) ?

What is the cation name for alcl3?