Respuesta :
Answer:
1. 1.145 mole
2. 19.368g
3. 66.67 moles
4. 0.0056g
Explanation:
The following calculations gives the answers to the various questions asked above:
1. Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Mass of NaCl from the question = 67g
Number of mole NaCl =.?
Number of mole = Mass /Molar Mass
Number of mole NaCl = 67/58.5
Number of mole of NaCl = 1.145 mol
2. Number of mole of H2O = 1.076 mole
Molar Mass of H2O = (2x1) + 16 = 2 + 16 = 18g/mol
Mass of H2O =?
Mass = number of mole x molar Mass
Mass of H2O = 1.076 x 18
Mass of H2O = 19.368g
3. Molar mass of C6H12O6 = (12x6) + (12x1) + (16x6) = 72 + 12 + 96 = 180g/mol
Mass of C6H12O6 = 1.2x104g
Mole of C6H12O6 =.?
Number of mole = Mass /Molar Mass
Mole of C6H12O6 = 1.2x104/180
Mole of C6H12O6 = 66.67 moles
4. Molar mass of Br2 = 2 x 80 = 160g/mol
Mole of Br2 = 3.5x10^-5 moles
Mass of Br2 =?
Mass = number of mole x molar Mass
Mass of Br2 = 3.5x10^-5 x 160
Mass of Br2 = 5.6x10^-3 = 0.0056g
Answer:
i) 1.15 moles NaCl
ii) 19.39 grams H2O
iii) 66.61 moles C6H12O6
iv) 0.00559 grams Br2
Explanation:
Step 1: data given
Molar mass = mass / moles
i.67 grams of NaCl to moles of NaCl
Moles = mass / molar mass
Moles NaCl = 67 grams / 58.44 g/mol
Moles NaCl = 1.15 moles NaCl
1.076 moles of H2O to grams of H2O
Mass H2O = 1.076 moles * 18.02 g/mol
Mass H2O = 19.39 grams H2O
1.2x104grams of C6H12O6to moles
Moles C6H12O6 = 12000 grams / 180.16 g/mol
Moles C6H12O6 = 66.61 moles C6H12O6
3.5x10-5 moles of Br2 to grams Br2
Mass Br2 = 3.5x10^-5 moles * 159.81 g/mol
Mass Br2 = 0.00559 grams Br2
