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Homework answers / question archive / 2
2. The difference between moles and atomic mass units as units for measuring atom is a. Moles represent the number of atoms/molecules of a substance in one gram of that substance while amu is the mass in grams of one atom/molecule of a substance. b. Atomic mass units are for measuring individual molecule or atom masses, while moles are for measuring larger quantities of a compound c. A and B d. A mole is always a mole, while an atomic mass unit depends on which element you are measuring, e. A, B, and D
3. Please write the balanced decomposition reaction of cesium carbonate (Cesium is element #55)
5. What is the mass in kilograms of 1 mole of HCI04? 6. How many moles are in 34.5 grams of NaBrO3? 7. Please write the balanced chemical formation reaction for Iron (II) Sulfate. 8. Using your chemical reaction from #7, how many moles of oxygen are needed to make 5 moles of the Iron (II) Sulfate?
9. A chemist has aluminum oxide and causes it to decompose Into aluminum and oxygen gas. Please write the balanced decomposition reaction. You will have to figure out the chemical formula of aluminum oxide. (hint = aluminum oxide is an ionic compound)
10. Using your chemical reaction from #9, please calculate how many moles of aluminum are produced when 9.18 moles of oxygen are produced.
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