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.

Which contributions did galileo make to the model of the solar system? check all that apply. a mathematical model for the orbits of the planets scientifically accurate data on planetary orbits data that showed that planets reflected sunlight similar to earth's moon up the idea that stars are other suns that do not move u observations of the moons of jupiter rotating around the gas giant