Answer:
<em><u>Over 96 percent is saline. Of total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground.</u></em>
The force of an object due mass and gravity.it can also be defined as the force exerted by gravity on a body
Answer:
A. No precipitate is formed
Explanation:
Hello,
In this case, since the reactions are:
We evidence no formation of insoluble salts or precipitates since both calcium and barium chlorides are largely soluble in water due to the ionic bond which binds them, thus A. No precipitate is formed.
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Answer:
136.5°C
Explanation:
Given data
- Boiling point of X: 134.5°C
- Molal boiling point elevation constant (Kb): 1.36·°C·kg.mol⁻¹
We can calculate the elevation in the boiling point (ΔT) using the following expression.
ΔT = Kb × m
where,
m is the molality
The molar mass of urea is 60.06 g/mol. The moles of urea corresponding to 76 g is:
76 g × (1 mol/60.06g) = 1.3 mol
The mass of the solvent (X) is 850 g = 0.850 kg.
The molality is:
m = 1.3 mol / 0.850 kg = 1.5 mol/kg
Then,
ΔT = Kb × m
ΔT = 1.36·°C·kg.mol⁻¹ × 1.5 mol/kg
ΔT = 2.0 °C
The boiling point of the solution is
134.5°C + 2.0°C = 136.5°C
Answer:
Explanation:
sp² hybridization is found in those compounds having double bond .
Out of the given compounds only C₂H₂Cl₂ has double bond so this compound contains carbon with sp² hybridization .
Rest have sp³ hybridization because they are saturated compounds .
