HESI CHEMISTRY Questions and Correct Answers the Latest Update and Recommended Version
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Course
Hesi A2 Chemistry
Institution
Hesi A2 Chemistry
What makes an atom's physical structure?
→ A nucleus and orbits(sometimes known as electron clouds)
What composes the center of the atom?
→ Protons and neutrons
What spins in the orbits of an atom?
→ Electrons
What are the energy levels of the atom called?
→ Shells or orbits
What is...
What is the term given to the results of a chemical reaction?
→ The products.
Why must a chemical equation be balanced at the end of a reaction?
→ Because the law of conservation of mass indicates that mass cannot be created nor
destroyed in a chemical reaction.
What are equilibrium reactions?
→ Chemical reactions that stop before all the reactants are used to make the products.
What causes equilibrium?
→ The state in which reactants are forming products at the same rate that products are
forming reactants.
What are the four basic ways to increase the reaction rate?
→ Increase temperature
→ Increase the surface area of the reactants
→ Add a catalyst
→ Increase the concentration of the reactants.
What does increasing temperature cause in a chemical reaction?
→ The particles have greater kinetic energy, increasing the speed at which they move
around, and the chance of collision between particles.
How does increasing the surface area of the particles in a reaction speed chemical reactions?
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