THINK Process
A student performed an experiment to test the
acidity of foods. Put the following steps in the order
they should occur.
The student
records the acidity of the food.
asks a question about food's acidity.
observes that there are acidic foods.
presents the results to the class.
prepares to conduct the experiment
creates a hypothesis about the acidity.
5) Intro

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Identify and describe the three ways that mutations affect organisms.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.