15.5% by mass is
equivalent 15.5 g urea in 100 g solution or 155 g urea in 1 kg solution. <span>
<span>we know that molality = moles solute / kg solvent
<span>moles solute = 155 g / 60 g/mol = 2.58 moles urea
</span></span></span>
Since there are 155 g
urea in 1000g solution, hence the solvent is 845 g or 0.845 kg
So:<span>
<span>molality = 2.58 / 0.845 = 3.06 m</span></span>
The amount of water evaporating from the ocean is significantly larger than the amount of precipitation falling into the ocean. On a global scale, the ocean loses about 577,000 cubic kilometers of water through evaporation each year, whereas it gains just 505,000 cubic kilometers of water from precipitation.
<h3>The Hydrologic Cycle and its Impact on the Ocean</h3>
Is a natural process involving evaporation, precipitation, transport, and recirculation of water through the land and ocean. The key elements in the hydrologic cycle are water and heat.
The hydrological cycle is important for life on Earth, as it regulates air moisture levels and contributes to:
- Food production
- Energy production
- Aquifer recharge
- Flood mitigation
The hydrological cycle also has a significant impact on the ocean, regulating:
- Salinity levels
- Temperature
- Seawater circulation
Learn more about The Hydrologic Cycle:
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A) Double replacement
Because the reactants switch when they become products
Answer:
C- a method of testing an idea