MB₂H₆: 2×11g+6×1g= 28 g/mol
...................
B₂H₆ + 3O₂ ---> 2HBO₂ + 2H₂O
28g.......................................2 mol......
28g B₂H₆ ---- 2 mol H₂O
19,2g B₂H₆ --- X
X = (2×19,2)/28
X = 1,37 mol H₂O
Answer:
Mixtures are made of two or more substances (elements or compounds) that are mixed physically but not chemically.
Using this definition we can say the reasons are the first two.
Answer:
2,347.8 grams
Explanation:
The freezing point depression Kf of water = 1.86° C / molal.
To still freeze at -12° C, then the molality of the solution 12/ 1.86 = 6.45 moles
The molecular weight of sorbitol (C6H14O6)is:
6 C = 6 ×12 = 72
14 H = 14 × 1 = 14
6 O = 6 × 16 = 96
...giving a total of 182
So one mole of sorbitol has a mass of 182 grams.
Since there are 2 kg of water, 2 × 6.45 moles = 12.9 moles can be added to the water to get the 12° C freezing point depression.
Therefore
grams = moles × molar mass
12.9 moles × 182 grams / mole = 2,347.8 grams of sorbitol can be added and still freeze
Answer:
Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains. Volume is often quantified numerically using SI derived unit, the cubic meter.
Explanation: