A solution that has a higher osmotic pressure than body fluids is said to be a <span>hypertonic solution.</span>
To understand what makes a material hard, it is necessary to look at the atomic structure of its crystals. ... In diamonds, however, the carbon atoms are bound together in a tetrahedral formation, a shape that is extremely rigid. Combined with the strong carbon to carbon bonds, it makes diamond extremely hard
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Answer:
A. The number of moles of HNO2 will remain the same. True
B. The number of moles of NO2- will remain the same. False
C. The equilibrium concentration of H3O will remain the same. False
D. The pH will decrease. False
E. The ratio of [HNO2] / [NO2-] will remain the same. True
Explanation:
The mixture of nitrous acid and potassium nitrite is a buffer solution. Hence the properties outlined above. Buffer solutions are designed to militate against changes in acidity or alkalinity. This explains why the above statements were categorized as true or false accordingly.
Answer:
124.6 g/mol will be the molar mass for the unknown non-electrolyte
Explanation:
Freezing point depression → ΔT = Kf . m
ΔT indicates the temperature variation:
Freezing point of pure solvent - Freezing point of solution
Kf is the cryoscopic constant → 29.8 K/m
Generally the unit is °C/m but we have to type the ΔT by K so let's replace the data given → 7.03 K = 29.8 K/m . m
m = 7.03 K / 29.8 m/K = 0.236 mol/kg
m means molality, the moles of solute in 1 kg of solvent. If we want to determine the moles of solute we do this operation:
molality . kg, so we may convert the mass of solvent from g to kg.
50 g . 1kg/1000g = 0.05 kg
0.236 mol/kg . 0.05 kg = 0.0118 moles
Molar mass → g/mol → So 1.47 g / 0.0118 mol = 124.6 g/mol
