Question 16 What is the coefficient of Cuowhen the equation is balanced? [a] Cu2

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Question 16 What is the coefficient of Cuowhen the equation is balanced? [a] Cu20 Question 17 In an experiment phosphorus pentachloride reacts with water to give phosphoric acid and hydrogen chloride according to the equation: PCI5 4 H20 H3PO4 5 HCI If 0.400 mole of PCIs reacts with 1.40 mole of water, how many moles of HCI are produced? IHCI moles Question 18 Consider the balanced reaction: Mgo 2 HBr MgBr2 H20 Formula Weights (g/mol) Mgo 40.3 HBr 80.91 MgBr2- 184.1 H20 18.02 (a when 18.0 grams of Mgo and 32.4 grams of HBr react, what is the limiting reactant? (b) How many grams of magnesium bromide IF.w. 184.1] are formed in the reaction? How many grams of water are formed in the reaction? (dy How many grams of the excess reactant are left at the end of the reaction? T T T Arial 3 (12pt) T a le PC

Explanation / Answer

13. Balanced reaction is 4 Li(s) + O2 (g) = 2Li2O

14. Balance reaction for combustion of C5H10

C5H10 + 15/2O2 = 5CO2 +5H2O.

Coefficient of O2 is 15/2

15. Balance recatio is

2AgNO3 + K2SO4 = 2KNO3 + Ag2SO4

     Coefficient of KNO3 is 2

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