How do enzymes lower the activation energy of a reaction? select one:

a. they provide heat to the reaction

b. they facilitate the reaction to occur

c. they provide additional hydrogen ions?

Q1 What are the energy transformations of a fan? A flashlight? Burning a little wood?

What statement best describes an independent variable? a. The factor that's not changed by the experimenter and is impacted by the dependent variable b. The factor that's changed by the experimenter and impacts the constant in an experiment c.

For the unbalanced equation, what is the coefficient for O2?? C5H10 (l) + ? O2 (g) →? CO2 (g) + ? H2O (g) A. 5 B. 10 C. 15 D. 6 E. 1

The following reaction is at equilibrium. What would be the effect of adding an excess of N2 and O2? N2 + O2 ↔ 2NO Question 16 options: The equilibrium will shift to the right. The equilibrium will shift to the left. Less product will be produced.

Choose all the true statements concerning the law of conservation of mass: a) When ice melts, mass is gained since water is more dense than ice.

Sulfur oxidation Choose one: A. contributes to global warming due to CO2 production. B. contributes to global warming due to methane production. C. causes environmental acidification due to production of sulfuric acid. D.

Consider a liquid in a piston apparatus that is at equilibrium with the vapor phase. in which direction should the piston be moved to decrease the number of molecules in the liquid phase?

Based on its location in the periodic table, what can most likely be predicted about phosphorus? It has three valence electrons available for bonding. It has three nonbonding electrons. It has five valence electrons available for bonding.

The rate constant is found to be 3.9 x 10-5 M-1 s-1. Calculate the rate of formation of ozone when the concentration of oxygen atoms is 3.0 x 10-14 molar and the concentration of diatomic oxygen is 1.3 x 10-14 molar.

The element Oxygen, O, is an example of which of the following? Question 8 options: A compound B molecule C atom D mixture