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What is the mass of 1.00 mole of magnesium oxide?I need the conversation factor PLEASE

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1., A, 2. c, 3. b  4, d  5, c  6, d  7, b  8, c

a) 3.33 g or 0.137 mol of Mg

b) 0.1729 g or 5.403 mmol (mmol = 1/1000 mol) of silver oxide

c) 542 g or 6.43 mol of magnesium carbonate

d) 13.8 Kg or 768 mol of water

e) 2.761 g or 16.30 mol of barium oxide

a)                                       Mg + 2HCl → MgCl2 + H2

Molar mass             Mg = 24.305 g/mol        HCl = 36.46094 g/molProportions              X g of Mg 5.00 g of HCl

                                         X = 3.33 g of  Mg

Number of moles     3.33 g / 24.305 g/mol = 0.137 mol of Mg

b)                                       2AgO2 → 2Ag + O2

Molar mass             AgO2 = 231.735 g/mol             O2 = 31.998Proportions              1.252 g of AgO2 X g of O2

                                         X = 0.1729 g of  O2

Number of moles    0.1729 g / 31.998 g/mol = 0.005403 mol of O2

c)                                       MgCO3 → MgO + CO2

Molar mass             MgCO3  = 84.3139 g/mol         CO2 = 44.01 g/molProportions              X g ofMgO3 X g of O2

                                         X = 542 g of  CO2

Number of moles     542 g / 44.01 g/mol = 6.43 mol of MgCO3

d)                                       2C2H2 + 5O2 → 2H2O + 4CO2

Molar mass             C2H2 = 26.04 g/mol             H2O = 18.01528 g/molProportions              20.0 Kg of C2H2X g of H2O

                                         X = 13.8 Kg of  H2O

Number of moles     13.8 Kg / 18.01528 g/mol = 768 mol of H2O

e)                                       2BaO2 → 2BaO + O2

Molar mass             BaO2 = 169.33 g/mol             BaO = 153.33 g/molProportions              X g of BaO2        2.500 Kg of BaO

                                         X = 2.761 Kg of  BaO2

Number of moles     2.761 Kg / 169.33 g/mol = 16.30 mol of BaO2

number one, A

number two, c

number three, b

number four, d

number five, c

number six, d

number seven, b

number eight, c

77
Lori King
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