1. Calculate the formula of the following compounds to the nearest 0.1AMU. (4 po

Question

1. Calculate the formula of the following compounds to the nearest 0.1AMU. (4 points) a. MgO b. Al(OH)s c. CJHsO Balance the following chemical equations. (6 points, 2 each) (a) Zn + aHCI ZnCl2 + H2 (b) Fe + O2 Fe3O3 (c) C2H6 + O2 CO2 + H2O 2. 3. Circle the spectator ion in the following chemical reaction. (4 points) 4. Write the net ionic equation for the reaction in question 3. (4 points) 5. Oxidation is the (4 points) (a) loss of electrons (b) gain of electrons (c) any exothermic reaction (d) none of these 6. Which of the elements in the following chemical reaction has been reduced? (4 points) 7. How many grams are in one mole orc2H? (4 points)

Explanation / Answer

1)
a)

Molecular mass of MgO,
MM = 1*MM(Mg) + 1*MM(O)
= 1*24.31 + 1*16.0
= 40.3 amu
Answer: 40.3 amu

b)
Molecular mass of Al(OH)3,
MM = 1*MM(Al) + 3*MM(O) + 3*MM(H)
= 1*26.98 + 3*16.0 + 3*1.008
= 78.0 amu
Answer: 78.0 amu

c)
Molecular mass of C3H8O,
MM = 3*MM(C) + 8*MM(H) + 1*MM(O)
= 3*12.01 + 8*1.008 + 1*16.0
= 60.1 amu
Answer: 60.1 amu

Only 1 question at a time please

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.