1. WHATS THE CORRECT NAME FOR P 2 O 5 ? 2. HOW MANY VALENCE ELECTRONS DOES A NEU

Question

1. WHATS THE CORRECT NAME FOR P2O5? 2. HOW MANY VALENCE ELECTRONS DOES A NEUTRAL ATOM OF SILICONHAVE? 3. WHAT AVERAGE TIME IS EXPRESSED USING THESE NUMBERS 90.3,90.2, AND 90.5? 4. HOW MANY NEUTRONS ARE PRESENT IN THIS ISOTOPE? 19, 8 5. WHAT IS THE EMPIRIAL FORMULA FORC6H12 6. COMPLETE THE CHEMICAL EQUATION 203 (G)-- 3_________(G) 7. HOW MANY LITERS ARE EQUIVALENT TO FIVE MILLILITERS? 8. THE CORRECT FORMULA FOR COPPER BROMIDE IS? 1. WHATS THE CORRECT NAME FOR P2O5? 2. HOW MANY VALENCE ELECTRONS DOES A NEUTRAL ATOM OF SILICONHAVE? 3. WHAT AVERAGE TIME IS EXPRESSED USING THESE NUMBERS 90.3,90.2, AND 90.5? 4. HOW MANY NEUTRONS ARE PRESENT IN THIS ISOTOPE? 19, 8 5. WHAT IS THE EMPIRIAL FORMULA FORC6H12 6. COMPLETE THE CHEMICAL EQUATION 203 (G)-- 3_________(G) 7. HOW MANY LITERS ARE EQUIVALENT TO FIVE MILLILITERS? 8. THE CORRECT FORMULA FOR COPPER BROMIDE IS? 6. COMPLETE THE CHEMICAL EQUATION 203 (G)-- 3_________(G) 7. HOW MANY LITERS ARE EQUIVALENT TO FIVE MILLILITERS? 8. THE CORRECT FORMULA FOR COPPER BROMIDE IS?

Explanation / Answer

      1) Phosphorous pentoxide (since 5 oxygen atoms arepresent).        2) 4 electrons (silicon has 14 electrons, 2 in 1st shell, 8 insecond, and 4 in the outermost one)    3) Average time = (90.3+90.2+90.5)/3 = 90.33 (approx)        4) No. of neutrons = 19-8 = 7    5) The emperical formula is C6/6H12/6 =CH2    6) The reaction is : 2O3 (g) -->3O2(g)       7) 5 ml = 5/1000 L = 0.005 L    8) Formula = CuBr2    

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