Activity 1: Solve for mole Direction: Answer the following problem. Show your solution.
1. How many moles are there in 178.05 g of Na?
2. How many moles are there in 150.18 8 of Fe?
Activity 2: Solve for Percent Composition
1. A chalk was found to contain CaCO3. Get the percent composition of each element in it.
2. Get the percent composition of each element in MgCO3.

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.